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Характеристики настольного телефона Yealink T48S 

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• Page 2: Declaration Of Conformity

  No parts of this publication may be subject to alteration, modification or commercial use. Yealink(Xiamen) Network Technology CO., LTD. will not be liable for any damages arising from use of an illegally modified or altered publication.

• Page 3: Class B Digital Device Or Peripheral

  Do not dispose of WEEE as unsorted municipal waste and have to collect such WEEE separately. Customer Feedback We are striving to improve our documentation quality and we appreciate your feedback. Email your opinions and comments to DocsFeedback@yealink.com.

• Page 4: Gnu Gpl Information

  GNU GPL INFORMATION Yealink SIP-T48S IP phone firmware contains third-party software under the GNU General Public License (GPL). Yealink uses software under the specific terms of the GPL. Please refer to the GPL for the exact terms and conditions of the license.

• Page 5: About This Guide

  About This Guide About This Guide Thank you for choosing the SIP-T48S IP phone, an ultra-elegant Gigabit IP phone which is exquisitely designed to provide business telephony features, such as Call Hold, Call Transfer, Busy Lamp Field, Call Recording, Multicast Paging and Conference over an IP network. It also features an enhanced user experience and newly developed industrial designs, with a large touch screen for easy and efficient use.

• Page 6
  User Guide for the SIP-T48S IP Phone…

• Page 7: Table Of Contents

  Table of Contents Table of Contents About This Guide …………….v In This Guide …………………………..v Summary of Changes ……………………….. v Changes for Release 81, Guide Version 81.20 ………………v Table of Contents …………….. vii Overview ………………1 Hardware Component Instructions ……………………1 Icon Instructions ………………………….

• Page 8
  User Guide for the SIP-T48S IP Phone Registration …………………………..34 Touch Screen Display ……………………….35 Navigating Menus and Fields……………………… 37 Entering Data and Editing Fields……………………38 Customizing Your Phone …………. 41 General Settings …………………………41 Wallpaper …………………………..41 Transparency …………………………44 Screen Saver…………………………..

• Page 9: Table Of Contents

  Table of Contents Basic Call Features …………..131 Placing Calls …………………………..132 Answering Calls …………………………134 Ending Calls …………………………..136 Redialing Numbers ……………………….. 136 Recent Call In Dialing ……………………….136 Auto Answer …………………………..138 Auto Redial …………………………..139 Call Completion …………………………141 Recall …………………………….

• Page 10
  User Guide for the SIP-T48S IP Phone Recording Using a USB Flash Drive ………………….190 Recording Using a Record Key ……………………197 Hot Desking …………………………..200 Intercom …………………………… 202 Configuring the Intercom Feature on the IP Phone…………….202 Using Intercom …………………………205 Multicast Paging …………………………

• Page 11: Overview

   User Interfaces  Documentations  If you require additional information or assistance with your new phone, contact your system administrator. Hardware Component Instructions The main hardware components of the SIP-T48S IP phone are the touch screen and the keypad.

• Page 12
  User Guide for the SIP-T48S IP Phone Hardware component instructions of the SIP-T48S IP phone are: Item Description Indicates phone power and some feature statuses. ① Power Indicator LED • Receives an incoming call—Fast flashing • Receives a voice mail or text message—Slowly flashing The screen is touch-sensitive.

• Page 13: Icon Instructions

  Overview Item Description • Laying the handset down on the handset cradle, the phone disconnects from the line. Icon Instructions Feature Status Icons Icons appearing on the status bar are described in the following table: Icons Description Wired network is unavailable Hands-free speakerphone mode Handset mode Headset mode…

• Page 14: Line Key Icons

  User Guide for the SIP-T48S IP Phone Icons Description Bluetooth mode is on Bluetooth headset is both paired and connected Wi-Fi connection is successful Wi-Fi connection failed Wired network is unavailable Line Key Icons Icon indicator (associated with line key features):…

• Page 15
  Overview Icons Description ReCall Record URL Record Recording starts successfully (Record/URL Record) Multicast Paging Group Listening Paging List Hot Desking Zero Touch Phone Lock Directory Speed Dial Icon indicator (associated with line) Icons Description The private line registers successfully The shared/bridged line registers successfully Register failed Registering (Flashing)
• Page 16
  User Guide for the SIP-T48S IP Phone Icons Description Call Park (Park successfully; Call park idle state) Call Park (Park failed) Call Park (Call park ringing state) Retrieve Park Icon indicator (associated with BLF/BLF List) Icons Description BLF/BLF List idle state…
• Page 17
  Overview Icons Description Intercom failed state…
• Page 18
  User Guide for the SIP-T48S IP Phone Icon indicator (associated with ACD) Icon Description Logged in the ACD system The ACD status is available The ACD state is Wrap up The ACD status is unavailable Logged out of the ACD system…

• Page 19: Other Icons

  Overview Icon Description The shared line conversation is barged in by the other shared line party. For a multi-party call, all the shared line parties participating in this call place the shared line conversation on hold. Icon indicator (associated with a bridged line) The local BLA phone indicates the phone is involved in a BLA call, while the monitoring BLA phone indicates the phone is not involved in the BLA call.

• Page 20: Led Instructions

  User Guide for the SIP-T48S IP Phone Icon Description Recording cannot be stopped (Using a record key) Icon indicator (associated with call history) Icon Description Received Calls Placed Calls Missed Calls Forwarded Calls Icon indicator (associated with contact) Icon Description…

• Page 21: User Interfaces

  Overview User Interfaces Two ways to customize configurations of your SIP-T48S IP phone: The user interface on the IP phone.  The user interface in a web browser on your PC.  The hardware components keypad and touch screen constitute the phone user interface, which allows the user to execute all call operation tasks and basic configuration changes directly on the phone.

• Page 22
  User Guide for the SIP-T48S IP Phone The main options you can use to customize the IP phone via phone user interface and/or via web user interface are listed in the following table: Options Phone User Interface Web User Interface…
• Page 23
  Overview Options Phone User Interface Web User Interface —Hotline √ Basic Call Features —Recent Call In Dialing × —Auto Answer √ —Auto Redial √ —Call Completion √ —ReCall √ —Do Not Disturb (DND) √ √ —Call Forward √ —Call Transfer √…

• Page 24: Documentations

  √ Note The table above lists most of the feature options. Please refer to the relevant sections for more information. Documentations The following table shows documentations available for the SIP-T48S IP phone. Name Contents Where found Language Basic call features…

• Page 25: Getting Started

  Navigating Menus and Fields  Entering Data and Editing Fields  If you require additional information or assistance with your new phone, contact your system administrator. Packaging Contents The following components are included in your SIP-T48S IP phone package: SIP-T48S IP Phone …

• Page 26: Optional Accessories

   Quick Start Guide  Check the list before installation. If you find anything missing, contact your system administrator. Optional Accessories The following items are optional accessories for your SIP-T48S IP phone. You need to purchase them separately if required.

• Page 27
  Getting Started Wall Mount Bracket  Power Adapter (5.5mm DC plug)  Headset  Wireless Headset Adapter EHS36  Bluetooth USB Dongle BT40 …

• Page 28: Phone Installation

  User Guide for the SIP-T48S IP Phone Wi-Fi USB Dongle WF40  We recommend that you use the accessories provided or approved by Yealink. The use of Note unapproved third-party accessories may result in reduced performance. Phone Installation If your phone is already installed, proceed to Phone Initialization on page 22.

• Page 29
  The top two slots are plugged up by silica gel. You need to pull out silica gel before attaching the wall mount bracket. For more information on how to attach the wall mount bracket, refer to Yealink Wall Mount Quick Installation Guide for Yealink IP Phones Connect the handset and optional headset Note The EXT port can also be used to connect an expansion module EXP40.
• Page 30
  Connect the DC plug on the power adapter to the DC5V port on the phone and connect the other end of the power adapter into an electrical power outlet. Note The IP phone should be used with Yealink original power adapter (5V/2A) only. The use of the third-party power adapter may cause the damage to the phone.

• Page 31: Network Connection

  Getting Started Power over Ethernet With the included or a regular Ethernet cable, the SIP-T48S IP phone can be powered from a PoE-compliant switch or hub. To connect the PoE: Connect the Ethernet cable between the Internet port on the phone and an available port on the in-line power switch/hub.

• Page 32: Connecting To The Wired Network

  Connecting to the Wireless Network Yealink SIP-T48S IP phone supports Wi-Fi feature. You can connect your phone to a wireless network. The wireless network is more convenient and cost-effective than wired network. The PC port is unavailable when using wireless network. For more information on how to connect to a…

• Page 33: Phone Status

  Getting Started DHCP (Dynamic Host Configuration Protocol) The phone attempts to contact a DHCP server in your network to obtain valid IPv4 network settings (e.g., IP address, subnet mask, default gateway address and DNS address) by default. Note If your network does not use DHCP, proceed to Basic Network Settings on page 24.

• Page 34: Basic Network Settings

  User Guide for the SIP-T48S IP Phone Enter the user name (admin) and password (admin) in the login page. Click Confirm to login. The phone status is displayed on the first page of the web user interface. If IP mode of the phone is configured as IPv4 &…

• Page 35
  Getting Started To configure the IP mode via phone user interface: ->Advanced (default password: admin) ->Network->WAN Port. Tap the gray box of the IP Mode field, and then select the desired value (IPv4, IPv6 or IPv4 & IPv6) from the pull-down list. Tap the Save soft key to accept the change or to cancel.

• Page 36: Wireless Network Settings

  User Guide for the SIP-T48S IP Phone To configure a static IPv6 address via phone user interface: ->Advanced (default password: admin) ->Network->WAN Port->IPv6. Tap the gray box of the Type field, and then select Static IP from the pull-down list.

• Page 37: Activating The Wi-Fi Mode

  Getting Started Activating the Wi-Fi Mode To activate the Wi-Fi mode via phone user interface: ->Basic->Wi-Fi. Tap the On radio box of the Wi-Fi field. The IP phone scans the available wireless networks in your area. When Wi-Fi USB dongle WF40 is connected to the USB port at the back of the IP phone, the screen Wi-Fi adapter has been added, scanning the available wireless network right now? will prompt “…

• Page 38
  User Guide for the SIP-T48S IP Phone Manually Connect to an Available Wireless Network To manually connect to a wireless network via phone user interface: ->Basic->Wi-Fi. Tap the On radio box of the Wi-Fi field. The IP phone scans the available wireless networks in your area.
• Page 39
  WPS can automatically configure a wireless network with a network name (SSID) and strong WPA data encryption and authentication. Two methods supported by Yealink IP phones in the Wi-Fi protected setup: Push Button Configuration (PBC): The user simply has to press WPS key on both the IP …
• Page 40
  User Guide for the SIP-T48S IP Phone Push Button Configuration (PBC) To connect to the wireless network using PBC method: ->Basic->Wi-Fi. Tap the On radio box of the Wi-Fi field. The IP phone scans the available wireless networks in your area.

• Page 41: Viewing The Wireless Network Information

  Getting Started Use the WLAN settings obtained from your gateway/router to configure this WLAN Profile on the IP phone. Do the following: If you select None or WEP from the pull-down list of Security Mode: Enter the profile name, SSID and WPA shared key in the corresponding fields. If you select WPA-PSK or WPA2-PSK from the pull-down list of Security Mode: Select the desired Cipher type (TKIP, AES or TKIP AES) from the pull-down list of Cipher Type.

• Page 42: Managing The Saved Wireless Network

  User Guide for the SIP-T48S IP Phone If the IP phone is connected to a wireless network successfully, you can also tap Wireless Status to view the connected wireless network information. Managing the Saved Wireless Network Once the IP phone has ever been connected to a wireless network successfully, the wireless network profile will be saved in The storage network list.

• Page 43: Disconnecting The Wireless Network Connection

  Getting Started Do one of the following: To edit the wireless network profile: Tap Edit. Edit the desired wireless network information. Tap the Save soft key. To change the priority of the wireless network: Tap Move Up or Move Down to improve or lower the priority of the wireless network that the IP phone automatically connects to.

• Page 44: Deactivating The Wi-Fi Mode

  The SIP-T48S IP phone supports up to 16 accounts. If your phone is not registered, you may have to register it. For more information on…

• Page 45: Touch Screen Display

  Getting Started Touch Screen Display Idle Screen Display If the phone has successfully started up, the idle screen will be displayed. The following figure is an example of what is displayed on the touch screen. Name Description Displays the phone’s default account, icons and the Status Bar time and date.

• Page 46
  User Guide for the SIP-T48S IP Phone Name Description status of the assigned feature. For more information, refer to Line Keys on page 106. Tap to unfold the DSSkey list, then you can tap the desired line key to configure it.

• Page 47: Navigating Menus And Fields

  Getting Started Configuration Screen Display Name Description Screen Title Area Displays the title of the current menu screen. Displays various operation options for different Operation Option Area menu screens. Displays menu items. Menu Tree Area Tap the desired menu item to enter the corresponding feature configuration screen.

• Page 48: Entering Data And Editing Fields

  User Guide for the SIP-T48S IP Phone To operate your phone, follow these tips: If you want to Action Enter the main menu. Return to the idle screen. Go back to the previous menu. or press Tap the item. Select an item.

• Page 49: Input Mode

  Getting Started Input Mode Keypad (initials in capitals) 3defDEF def3è é ê ë ð def3è é ê ë ð DEF3È É Ê Ë Ð 4ghiGHI ghi4ì í î ï ghi4ì í î ï GHI4Ì Í Î Ï 5jklJKL jkl5£ jkl5£ JKL5£…

• Page 50
  User Guide for the SIP-T48S IP Phone If you want to Then you can To enter “A”, press once. To enter “B”, press twice quickly. To enter “C”, press three times quickly. To enter “2ÄÆÅÀÁÂÃÇ”, press more than three times quickly.

• Page 51: Customizing Your Phone

  General Settings Wallpaper You can customize the wallpaper of the SIP-T48S IP phone, and can change the wallpaper image via phone user interface or web user interface. You can also upload custom pictures as wallpaper images via web user interface.

• Page 52
  Wallpaper or Wallpaper with DSSkey unfold field. Note The SIP-T48S IP phone screen size is 800*480 pixels. If the size of the custom wallpaper doesn’t meet the IP phone screen size, the wallpaper will be stretched or/and zoomed out according to…
• Page 53
  Customizing Your Phone Wallpaper on the Idle Screen You can change the wallpaper to display when the phone is idle. To change the wallpaper on the idle screen via phone user interface: ->Basic->Display->Wallpaper. , or press to select the desired wallpaper image. Tap the Save soft key to accept the change or to cancel.

• Page 54: Transparency

  User Guide for the SIP-T48S IP Phone To change the DSSkey wallpaper via phone user interface: ->Basic->Display->DSSkey Wallpaper. , or press to select the desired wallpaper image. Tap the Save soft key to accept the change or to cancel. Wallpaper with DSSkey unfold is configurable via web user interface at the path Settings->Preference->Wallpaper with DSSkey unfold.

• Page 55: Screen Saver

  Customizing Your Phone To change the transparency via phone user interface: ->Basic->Display->Transparency. Tap the gray box of the Transparency field, and then select the desired value from the pull-down list. Tap the Save soft key to accept the change or to cancel.

• Page 56
  3. You can configure the phone whether to display the time & date on the screen saver or not. You can configure the screen saver of SIP-T48S IP phone, and upload custom pictures to set up a screen saver of your picture via web user interface. You can configure the screen saver wait time, screen saver type and screen saver display clock via phone user interface or web user interface.

• Page 57: Configuring The Screen Saver

  Customizing Your Phone This field appears only if Screensaver Type is set to Custom. The custom picture appears in Screensaver list. You can only delete the custom picture by clicking Del in the Screensaver field. Note You can only upload one custom image at a time via web user interface. Configuring the Screen Saver The screen saver wait time can be configured from the following options: Never: Screen saver is deactivated.

• Page 58
  User Guide for the SIP-T48S IP Phone This field is configurable only if you have uploaded a custom picture via web user interface. Tap the Save soft key to accept the change or to cancel. To configure the screen saver via web user interface Click on Settings->Preference.

• Page 59: Power Saving

  Customizing Your Phone Click Confirm to accept the change. Power Saving The power saving feature is used to turn off the backlight and screen to conserve energy. The IP phone enters power-saving mode after it has been idle for a certain period of time. The IP phone will exit power-saving mode if a phone event occurs: Press any key.
• Page 60
  User Guide for the SIP-T48S IP Phone To enable the power saving feature via web user interface: Click on Settings->Power Saving. Select Enabled from the pull-down list of Power Saving. Click Confirm to accept the change. Configuring the Office Hour via Web User Interface Office Hour specifies the starting time and ending time in the office each day.
• Page 61
  Customizing Your Phone Enter the starting time and ending time respectively in the desired day field. Click Confirm to accept the change. Configuring the Idle Timeout via Web User Interface Idle Timeout specifies the period of time before the IP phone enters power-saving mode. The following three types of idle timeout you can configure: Office Hours Idle TimeOut: Configures the idle timeout for office hours.

• Page 62: Backlight

  15s, 30s, 1min, 2min, 5min, 10min or 30min: Backlight is changed when the phone is  inactive after the designated time (in seconds). You can also change the intensity of the LCD screen of EXP40 connected to the SIP-T48S IP phone. To configure the backlight via phone user interface: ->Basic->Display->Backlight.

• Page 63: Contrast

  Backlight is configurable via web user interface at the path Settings->Preference. Contrast You can only configure the contrast of the expansion module EXP40 connected to the SIP-T48S IP phone to a comfortable level on the phone. Ensure that the expansion module has been connected to the phone before configuration.

• Page 64: Language

  User Guide for the SIP-T48S IP Phone The default contrast level is “6”. Tap the Save soft key to accept the change or to cancel. Language The default language of the phone user interface is English. If the language of your web browser is not supported by the phone, the web user interface will use English by default.

• Page 65: Time & Date

  Customizing Your Phone To change the language for the web user interface: Select the desired language from the pull-down list at the top-right corner of web user interface. Text displayed on the web user interface will change to the selected language. Time &…

• Page 66
  User Guide for the SIP-T48S IP Phone This field appears only if Daylight Saving field is selected Automatic, and the default time zone name is “China(Beijing)”. Tap the Save soft key to accept the change or to cancel. Appendix A – Time Zones…
• Page 67
  Customizing Your Phone To configure the date and time format via phone user interface: ->Basic->Time & Date->Time & Date Format. Tap the gray box of the Date Format field, and then select the desired date format from the pull-down list. Tap the gray box of the Time Format field, and then select the desired time format (12 Hour or 24 Hour) from the pull-down list.

• Page 68: Administrator Password

  User Guide for the SIP-T48S IP Phone Administrator Password The Advanced option is only accessible to the administrator. The default administrator password is “admin”. For security reasons, you should change the default administrator password as soon as possible. To change the administrator password via phone user interface: ->Advanced (default password: admin) ->Change Password.

• Page 69: Key As Send

  Customizing Your Phone Key As Send You can set the “#” key or “*” key to perform as a send key while dialing. To configure key as send via phone user interface: ->Features->General. Tap the gray box of the Key As Send field, and then select # or * from the pull-down list, or select Disabled to disable this feature.

• Page 70
  User Guide for the SIP-T48S IP Phone To activate the phone lock via phone user interface: ->Basic->Phone Lock. Enter the desired PIN (default PIN: 123) in the Unlock PIN field, and then tap OK. Tap the gray box of the Lock Enable field, and then select Enabled from the pull-down list.
• Page 71
  Customizing Your Phone To change the phone unlock PIN via phone user interface: ->Basic->Change PIN. Enter the desired value in the Old PIN, New PIN and Confirm PIN field respectively. Tap the Save soft key to accept the change or to cancel.

• Page 72: Audio Settings

  User Guide for the SIP-T48S IP Phone You can long press or wait for a period of time (if configured) to lock the phone again. Note You can also unlock the phone by administrator password. When you enter the administrator password to unlock the phone, the phone will turn to the Change PIN screen.

• Page 73
  Customizing Your Phone To adjust the ringer volume: When the phone is idle: Press to adjust the ringer volume. When the phone is ringing: Press to adjust the ringer volume. You can also press to adjust the ringer volume when selecting a ring tone. For more information, refer to Ring Tones on page 64.

• Page 74: Ring Tones

  User Guide for the SIP-T48S IP Phone To adjust the volume when the phone is during a call: Press to adjust the volume of currently engaged audio device (handset, speakerphone or headset). You can also press to adjust the volume when playing back the recording calls. For…

• Page 75
  Customizing Your Phone A ring tone for the phone is configurable via web user interface at the path Settings->Preference->Ring Type. To select a ring tone for the account via phone user interface: ->Basic->Sound->Ring Tones. Tap the desired account. Tap the desired ring tone. If Common is selected, this account will use the ring tone selected for the phone.

• Page 76: Key Tone

  User Guide for the SIP-T48S IP Phone In the Upload Ringtone field, click Browse to locate a ring tone file (the file format must be *.wav) from your local system. Click Upload to upload the file. The custom ring tone appears in the pull-down list of Ring Type.

• Page 77: Blf Ring Type

  Customizing Your Phone Tap the On or Off radio box of the Key Tone field. Tap the Save soft key to accept the change or to cancel. Key tone is configurable via web user interface at the path Features->Audio. BLF Ring Type You can specify a desired ring tone to play for BLF pickup on the phone.

• Page 78: Contact Management

  User Guide for the SIP-T48S IP Phone BLF ring type is configurable via web user interface at the path Features->Call Pickup. Contact Management This section provides the operating instructions for managing contacts. Topics include: Directory  Local Directory  Blacklist …

• Page 79: Local Directory

  Customizing Your Phone Click Confirm to accept the change. Note The list(s) to access for Directory soft key is configurable via web user interface only. To view the directory via phone user interface: when the phone is idle. If only one list is enabled for the directory, tap to view the list directly.

• Page 80: Adding Groups

  User Guide for the SIP-T48S IP Phone Adding Groups To add a group to the local directory: The IP phone enters the local directory directly as there is only Local Directory enabled in the directory by default. If Local Directory is removed from the directory (refer to…

• Page 81: Editing Groups

  Customizing Your Phone Tap the desired ring tone. If Auto is selected, this group will use the ring tone according to the priority: Contact ring tone (refer to Adding Contacts) >Account ring tone (refer to Ring Tones) >Phone ring tone (refer to Ring Tones).

• Page 82
  User Guide for the SIP-T48S IP Phone Tap the desired group. after the group name. Edit the group name in the highlighted field. to accept the change. Deleting Groups To delete a group from the local directory: The IP phone enters the local directory directly as there is only Local Directory enabled in the directory by default.

• Page 83: Adding Contacts

  Customizing Your Phone The touch screen prompts the following warning: Tap OK to confirm the deletion or Cancel to cancel. Adding Contacts You can add contacts to the local directory in one of the following ways: Manually  From call history …

• Page 84
  User Guide for the SIP-T48S IP Phone If Local Directory is removed from the directory (refer to Directory on page 68), tap ->Directory->All Contacts to enter the local directory. Tap Add. If you want add a contact to the specified contact group, you can tap the contact group first, and then tap Add.
• Page 85
  Customizing Your Phone after the desired entry. Tap Add. Edit the corresponding fields. Tap the Save soft key to accept the change. The entry is successfully saved to the local directory.
• Page 86
  User Guide for the SIP-T48S IP Phone Adding Contacts from a remote phone book To add a contact to the local directory from a remote phone book: ->Directory->Remote Phone Book. If Remote Phone Book is added to the directory (refer to…

• Page 87: Editing Contacts

  Customizing Your Phone Edit the corresponding fields. Tap the Save soft key to save the contact to the local directory. If the contact already exists in the local directory, the touch screen will prompt “Overwrite the original contact?”. Tap OK to overwrite the original contact in the local directory or Cancel to cancel.

• Page 88: Deleting Contacts

  User Guide for the SIP-T48S IP Phone If the contact was added to a specified contact group, you can tap the contact group first, and then tap after the desired contact. Tap the desired field to edit the contact information.

• Page 89
  Customizing Your Phone Tap Delete. The touch screen prompts the following warning: Tap OK to confirm the deletion or Cancel to cancel. To delete all contacts: The IP phone enters the local directory directly as there is only Local Directory enabled in the directory by default.
• Page 90
  User Guide for the SIP-T48S IP Phone The touch screen prompts the following warning: Tap OK to confirm the deletion or Cancel to cancel. Uploading Contact Photos To upload a new custom photo for a contact via web user interface: Click on Directory->Local Directory.
• Page 91
  Customizing Your Phone You can click Delete Photo to delete the custom photo. The phone only supports *.png, *.jpg and .bmp format files. The file size must be less than 5M. Note You can only delete custom photos. To change the custom photo for the contact via web user interface: Click on Directory->Local Directory.

• Page 92: Placing Calls To Contacts

  User Guide for the SIP-T48S IP Phone When you place a call to the contact or receive a call from the contact, the touch screen will display the contact photo. Placing Calls to Contacts To place a call to a contact from the local directory: The IP phone enters the local directory directly as there is only Local Directory enabled in the directory by default.

• Page 93: Searching For Contacts

  Customizing Your Phone will prompt: Tap the desired number. The selected number will be dialed out. Searching for Contacts To search for a contact in the local directory: The IP phone enters the local directory directly as there is only Local Directory enabled in the directory by default.

• Page 94
  User Guide for the SIP-T48S IP Phone Enter a few continuous characters of the contact name or continuous numbers of the contact number (office, mobile or other number) using the keypad. The contacts whose name or phone number matches the characters entered will appear on the touch screen.
• Page 95
  Customizing Your Phone Click Import XML to import the contact list. The web user interface prompts «The original contact will be covered, continue?». Click OK to complete importing the contact list. To import a CSV contact list file via web user interface: Click on Directory->Local Directory.
• Page 96
  User Guide for the SIP-T48S IP Phone It will prevent importing the title of the contact information which is located in the first line of the CSV file. Click Import CSV to import the contact list. (Optional.) Mark the On radio box in the Delete Old Contacts field.

• Page 97: Blacklist

  Customizing Your Phone To export a contact list via web user interface: Click on Directory->Local Directory. Click Export XML (or Export CSV). Click Save to save the contact list to your local system. Note Importing/exporting contact lists is available via web user interface only. Blacklist The built-in phone directory can store names and phone numbers for a blacklist.
• Page 98
  User Guide for the SIP-T48S IP Phone To add a contact to the blacklist directory from the local directory: The IP phone enters the local directory directly as there is only Local Directory enabled in the directory by default. If Local Directory is removed from the directory (refer to…

• Page 99: Remote Phone Book

  Customizing Your Phone Remote Phone Book You can add contacts to the local directory, search for a contact, or simply dial a contact number from the remote phone book. You can configure your new phone to access up to 5 remote phone books. The phone supports up to 5000 remote phone book entries.

• Page 100: Call History Management

  Click Confirm to accept the change. Call History Management The SIP-T48S IP phone maintains call history lists of Missed Calls, Placed Calls, Received Calls and Forwarded Calls. Call history list supports up to 400 entries. You can view call history, place…

• Page 101: Viewing History Records

  Customizing Your Phone History record feature is enabled by default, if you don’t want to save the call history, you can disable the feature. Viewing History Records To view call history: The touch screen displays all call records. to turn pages. You can also press to switch pages.

• Page 102: Adding A Contact To The Local Directory/Blacklist

  User Guide for the SIP-T48S IP Phone You can tap Missed Calls, Placed Calls, Received Calls or Forwarded Calls to view entries in each call list directly. Tap the desired entry. Adding a Contact to the Local Directory/Blacklist To add a contact to the blacklist directory from the call history list: The touch screen displays all call records.

• Page 103: Deleting History Records

  Customizing Your Phone Tap the Save soft key. For more information local directory and/or blacklist, refer to Local Directory on page and/or Blacklist on page 87. Deleting History Records To delete an entry from the call history list: The touch screen displays all call records. to turn pages.

• Page 104
  User Guide for the SIP-T48S IP Phone Tap the checkbox of Select All. Tap Delete. The touch screen prompts “Delete all the call records?”. Tap OK to confirm the deletion or Cancel to cancel.

• Page 105: Disabling History Record

  Customizing Your Phone Disabling History Record To disable history record via phone user interface: ->Features->General. Tap the Off radio box of the History Record field. Tap the Save soft key to accept the change or to cancel. Search Source List in Dialing You can search for a contact from the desired lists when the phone is on the dialing screen.

• Page 106
  User Guide for the SIP-T48S IP Phone To adjust the display order of the enabled list, select the desired list, and click Click Confirm to accept the change. The touch screen will display search results in the adjusted order. Note Search source list in dialing is configurable via web user interface only.

• Page 107: System Customizations

  Customizing Your Phone System Customizations Headset Use If you want to use a wired headset, physically connect your headset to the phone and activate the headset mode for use. For more information on physically connecting a headset, refer to Phone Installation on page 18.

• Page 108: Dual Headset

  User Guide for the SIP-T48S IP Phone To enable headset prior via web user interface: Click on Features->General Information. Select Enabled from the pull-down list of Headset Prior. Click Confirm to accept the change. To use headset prior, you should activate the headset mode in advance: Physically connect the headset.

• Page 109: Bluetooth Headset

  Dual headset is configurable via web user interface only. Bluetooth Headset The SIP-T48S IP phone supports Bluetooth. Bluetooth enables low-bandwidth wireless connections within a range of 10 meters (32 feet). The best performance is in the 1 to 2 meter (3 to 6 feet) range.

• Page 110
  User Guide for the SIP-T48S IP Phone Activating the Bluetooth Mode When you insert Bluetooth USB dongle BT40 into the USB port at the back of the IP phone, the touch screen prompts “Adapter has been added, scanning the bluetooth devices right now?”.
• Page 111
  Customizing Your Phone The touch screen displays the Bluetooth device information (device name and MAC address). Bluetooth mode is configurable via web user interface at the path Features->Bluetooth. Pairing and Connecting the Bluetooth Headset Before you pair a Bluetooth headset, check the indicator on the Bluetooth headset to make sure that the Bluetooth headset is discoverable.
• Page 112
  User Guide for the SIP-T48S IP Phone The default PIN is “0000”. Tap the OK soft key. The Bluetooth headset is then automatically connected to your IP phone. The touch screen displays as below: The Bluetooth icon appears on the touch screen.
• Page 113
  Customizing Your Phone With the Bluetooth headset paired and connected, you can use the Bluetooth headset to place and answer calls. For more information, refer to the documentation from the Bluetooth headset manufacturer. Viewing the Bluetooth Headset Information To view the Bluetooth headset information: ->Basic->Bluetooth.
• Page 114
  User Guide for the SIP-T48S IP Phone The default device name is “Yealink T48S”. Tap the Save soft key to accept the change or to cancel. The preconfigured Bluetooth device name will display in scanning list of other device. Disconnecting the Bluetooth Headset You can disconnect the Bluetooth headset from your phone.
• Page 115
  Customizing Your Phone headset, it disappears from the Bluetooth Device(s) list. To connect it to your IP phone again, you need to scan it first, and then connect it again. To delete your Bluetooth headset from your phone: ->Basic->Bluetooth. after the Bluetooth headset, and then select Delete from the prompt list. The touch screen prompts the following warning “Delete selected item?”.

• Page 116: Dss Keys

  User Guide for the SIP-T48S IP Phone DSS Keys There are three types of DSS keys: Line Keys, Programable Keys and Ext Keys. Details will be introduced in the following. The SIP-T48S IP phone supports 29 line keys and 13 programable keys. Line Keys You can assign predefined functionalities to line keys.
• Page 117
  Customizing Your Phone The following figure shows an example of label display when the label length feature is set to Extended: The following figure shows an example of label display when the label length feature is set to Default:…
• Page 118
  User Guide for the SIP-T48S IP Phone To configure the label length via web user interface: Click on Dsskey->Line Key. Select Extended from the pull-down list of Label Length. Click Confirm to accept the change. Note Label length feature is configurable via web user interface only.
• Page 119
  Customizing Your Phone Forward  Transfer  Hold   Group Listening  Zero Touch   Phone Lock  Retrieve  Directory  For the features not listed above, refer to Basic Call Features on page Advanced Phone Features on page 181.
• Page 120
  User Guide for the SIP-T48S IP Phone Type (Key Event) Dependencies: Key Type (Voice Mail) Account ID (the account this feature will be applied to) Label (key label displayed on the touch screen) Value (the voice mail access code) Usage: Tap the Voice Mail key to dial out the voice mail access code. Then follow the voice prompt to listen to the voice mails.
• Page 121
  Customizing Your Phone DTMF You can use this key feature to send the specification of arbitrary key sequences via DTMF. Type (Key Event) Dependencies: Key Type (DTMF) Label (key label displayed on the touch screen) Value (DTMF sequence) Usage: Tap the DTMF key during an active call to send the key sequence specified in the Value field.
• Page 122
  User Guide for the SIP-T48S IP Phone Usage: Tap the XML Group key to access the remote group specified in the XML Group field. XML Browser You can use this key feature to quickly access an XML browser. The XML browser allows you to create custom services which meet your functional requirements on the server.
• Page 123
  Customizing Your Phone Usage: Tap the Conference key during an active call to set up a conference with the number specified in the Value field. Note If the Value field is left blank, the key performs the same as the Conference soft Conference key during a call.
• Page 124
  User Guide for the SIP-T48S IP Phone Hold You can use this key feature to place an active call on hold or retrieve a held call. Type (Key Event) Dependencies: Key Type (Hold) Label (key label displayed on the touch screen) Usage: Tap the Hold key during an active call to place the call on hold.
• Page 125
  Customizing Your Phone Zero Touch You can use this key feature to quickly configure auto provision and network parameters. Type (Key Event) Dependencies: Key Type (Zero Touch) Label (key label displayed on the touch screen) Usage: Tap the Zero Touch key to access the zero touch screen. Tap the OK soft key within a few seconds.
• Page 126
  User Guide for the SIP-T48S IP Phone Directory You can use this key feature to easily access frequently used lists. For more information, refer to Directory on page 68. Type (Key Event) Dependencies: Key Type (Directory) Label (key label displayed on the touch screen) Usage: Tap the Directory key to immediately access to frequently used lists.

• Page 127: Ext Keys

  To customize ext keys via web user interface: Click on Dsskey->Ext Key. Customize specific features for these keys. Click Confirm to accept the change. Yealink EXP40 User Guide For more information, refer to Note Ext keys are configurable via web user interface only.

• Page 128: Account Management

  User Guide for the SIP-T48S IP Phone Account Management You can register one or multiple accounts on the SIP-T48S IP phone. You can also configure each line key to associate with an account or configure multiple line keys to associate with an account.

• Page 129: Default Account

  Customizing Your Phone Multiple accounts: To disable an account via phone user interface: ->Advanced (default password: admin) ->Account. Tap the desired account. Tap the gray box of the Activation field, and then select Disabled from the pull-down list. Tap the Save soft key to accept the change or to cancel.

• Page 130
  User Guide for the SIP-T48S IP Phone The label of the default account is displayed on the left of the status bar. The IP phone will use this account by default when dialing out. You can tap the label of the default account, and then tap the desired account to be the new default account.

• Page 131: Dial Plan

  Dial Plan Dial plan is a string of characters that governs the way your SIP-T48S IP phone processes the inputs received from your phone keypad. The SIP-T48S IP phone supports the following dial plan features: Replace Rule …

• Page 132: Replace Rule

  User Guide for the SIP-T48S IP Phone logically combine two or more patterns. Example: «([1-9])([2-7])3» would match «923», «153», «773», etc. The “$” should be followed by the sequence number of a parenthesis. The “$” plus the sequence number means the whole character or characters placed in the parenthesis.

• Page 133: Dial Now

  Customizing Your Phone Click Add to add the replace rule. When you enter the number “1” using the keypad and then tap Send, the phone will dial out “1234” instead. The valid values for the Account field can be one or more digits among 1-16. Every two digits Note must be separated by a comma.

• Page 134
  User Guide for the SIP-T48S IP Phone For more information on the valid values for the Account field, refer to Replace Rule page 122. Click Add to add the dial now rule. When you enter the number “234” using the keypad, the phone will dial out “234”…

• Page 135: Area Code

  Customizing Your Phone The default value is “1”. Click Confirm to accept the change. Note Time out for dial now rule is configurable via web user interface only. Area Code Area codes are also known as Numbering Plan Areas (NPAs). They usually indicate geographical areas in a country.

• Page 136: Block Out

  User Guide for the SIP-T48S IP Phone For more information on the valid values for the Account field, refer to Replace Rule page 122. Click Confirm to accept the change. Note The default value of minimum and maximum length is 1 and 15 respectively.

• Page 137: Emergency Number

  Customizing Your Phone Emergency Number Public telephone networks in countries around the world have a single emergency telephone number (emergency services number), that allows a caller to contact local emergency services for assistance when necessary. The emergency telephone number may differ from country to country.

• Page 138: Live Dialpad

  User Guide for the SIP-T48S IP Phone Live Dialpad You can enable live dialpad feature on the SIP-T48S IP phone, which enables the IP phone to automatically dial out a phone number without pressing the send key. You can also configure a delay, and then the phone will dial out the phone number automatically after the designated period of time.
• Page 139
  Customizing Your Phone Enter the desired delay time in the Hotline Delay field. The valid values range from 0 to 10 (seconds) and the default value is “4”. Tap the Save soft key to accept the change or to cancel. Hotline is configurable via web user interface at the path Features->General Information.
• Page 140
  User Guide for the SIP-T48S IP Phone…

• Page 141: Basic Call Features

  Basic Call Features Basic Call Features The SIP-T48S IP phone is designed to be easily used like a regular phone on a public switched telephone network (PSTN). You can place calls, answer calls, transfer a call to someone else, or conduct a conference call.

• Page 142: Placing Calls

  User Guide for the SIP-T48S IP Phone Placing Calls You can place a call in one of three ways using your SIP-T48S IP phone: Using the handset  Using the speakerphone  Using the headset  You can also dial the number first, and then choose the way you want to speak to the other party.

• Page 143
  Basic Call Features You can also enter the number using the on-screen keypad. Press , or tap Send. The # key is configured as a send key by default. You can also set the * key as the send key, or set neither.

• Page 144: Answering Calls

  50 calls at one time. To place multiple calls: You can have more than one call on your SIP-T48S IP phone. To place a new call during an active call, do one of the following: Tap the line key. The active call is placed on hold.

• Page 145
  Basic Call Features Answering When Not in Another Call Call duration and destination will always appear on the touch screen for the active call. To answer a call using the handset: Pick up the handset. To answer a call using the hands-free speakerphone mode: Do one of the following: Press With the handset on-hook and the headset mode deactivated, tap the Answer soft key.

• Page 146: Ending Calls

  User Guide for the SIP-T48S IP Phone Ending Calls To end a call: Do one of the following: If you are using the handset, press , the End Call soft key or hang up the handset. If you are using the headset, press or the End Call soft key.

• Page 147
  Basic Call Features Select Enabled from the pull-down list of Recent Call In Dialing. Click Confirm to accept the change. Note Recent call in dialing is configurable via web user interface only. To view placed calls list when the phone is on the dialing interface: Pick up the handset, press the Speakerphone key or tap the line key.

• Page 148: Auto Answer

  User Guide for the SIP-T48S IP Phone You can also enter a few continuous characters of the contact name or continuous numbers of the contact number (office, mobile or other number) to search from placed calls list. Auto Answer You can use auto answer feature to automatically answer an incoming call on a line. Auto answer is configurable on a per-line basis.

• Page 149: Auto Redial

  Basic Call Features The icon appears on the touch screen. Auto answer is configurable via web user interface at the path Account->Basic. Note Auto answer is only applicable when there is no other call in progress on the phone. Auto Redial You can enable auto redial to automatically redial a phone number when the called party is busy.

• Page 150
  User Guide for the SIP-T48S IP Phone The default value is “10”. Tap the Save soft key to accept the change or to cancel. Auto redial is configurable via web user interface at the path Features->General Information. To use auto redial:…

• Page 151: Call Completion

  Basic Call Features The touch screen prompts the following: Wait for the designated period of time or tap the OK soft key to redial the phone number. The phone will retry as many times as configured until the called party is idle. Call Completion You can use call completion to notify the caller who failed to reach a desired party when the party becomes available to receive a call.

• Page 152: Recall

  User Guide for the SIP-T48S IP Phone To use call completion: When the called party is busy, the following prompt will appear on the touch screen of the phone: Tap OK, the phone will then returns to the idle screen and call completion will be activated.

• Page 153: Call Mute

  Basic Call Features To configure a recall key via phone user interface: Tap More. Tap the desired line key. Tap the gray box of the Type field, and then select Key Event from the pull-down list. Tap the gray box of the Key Type field, and then select ReCall from the pull-down list. (Optional.) Enter the string that will appear on the touch screen in the Label field.

• Page 154: Mute A Call

  User Guide for the SIP-T48S IP Phone Mute a Call To mute a call: Press during an active call. The mute key LED illuminates solid red. The touch screen indicates that the call is now muted. To un-mute a call: Press again to un-mute the call.

• Page 155: Call Hold/Resume

  Basic Call Features To mute the microphone on any screen: Press on any screen (for example, ringing, dialing, talking or idle). The mute key LED illuminates solid red. The icon on the status bar appears. To un-mute the microphone on any screen: Press again on any screen (for example, ringing, dialing, talking or idle).

• Page 156
  User Guide for the SIP-T48S IP Phone To place a call on hold: Press or tap the Hold soft key during a call. The touch screen indicates that the call is on hold. Note The phone will beep softly every 30 seconds to remind you that you still have a call on hold. The phone ignores engaged audio device (handset or headset) and switches to Speakerphone to play the hold tone by default.

• Page 157: Do Not Disturb (Dnd)

  Basic Call Features Do Not Disturb (DND) You can use DND to reject incoming calls automatically on the phone. The prompt message “n New Missed Call(s)” (“n” indicates the number of missed calls, e.g., 1 New Missed Call(s)) will appear on the touch screen, and callers will receive a busy message. All calls you receive while DND is enabled are logged to your missed calls list.

• Page 158
  User Guide for the SIP-T48S IP Phone You can enable/disable DND for the phone system, or you can customize DND for each or all accounts. Two DND modes: Phone (default): DND is effective for the phone system.  Custom: DND can be configured for each or all accounts.
• Page 159
  Basic Call Features To enable DND in phone mode: The icon appears on the status bar. When DND and busy forward are enabled in phone mode, calls will be sent to the configured Note destination number. For more information on busy forward, refer to Call Forward on page 152.
• Page 160
  User Guide for the SIP-T48S IP Phone Tap the Save soft key to accept the change. If you want to enable DND for all accounts, you can press the All On soft key. If you enable DND for the default account, the associated line icon will change to…
• Page 161
  Basic Call Features If you enable DND for all accounts, all line icons will change to and the icon will appear on the status bar. When DND and busy forward are enabled for a specific account, calls from the specific account Note will be sent to the configured destination number.

• Page 162: Call Forward

  User Guide for the SIP-T48S IP Phone numbers specified in the DND Authorized Numbers field. Note DND authorized number is configurable via web user interface only. When the phone misses a call, a prompt window will pop up by default. If you want to disable the feature, contact your system administrator for more information.

• Page 163
  Basic Call Features To configure the call forward mode via web user interface: Click on Features->Forward&DND. In the Forward block, mark the desired radio box in the Mode field. Click Confirm to accept the change. Note Call forward mode is configurable via web user interface only. To enable call forward in phone mode: ->Features->Call Forward or press when the phone is idle.
• Page 164
  User Guide for the SIP-T48S IP Phone (Optional.) Enter the always forward on code or off code respectively in the On Code or Off Code field. If you tap Busy Forward: Tap the On radio box of the Busy Forward field.
• Page 165
  Basic Call Features (Optional.) Enter the no answer forward on code or off code respectively in the On Code or Off Code field. Tap the Save soft key to accept the change. The icon on the idle screen indicates that the call forward is enabled. To enable call forward in custom mode: ->Features->Call Forward or press when the phone is idle.
• Page 166
  User Guide for the SIP-T48S IP Phone (Optional.) Enter the always forward on code or off code respectively in the On Code or Off Code field. You can also enable always forward for all accounts. Do the following: Tap the All Lines soft key.
• Page 167
  Basic Call Features (Optional.) Enter the busy forward on code or off code respectively in the On Code or Off Code field. You can also enable busy forward for all accounts. Do the following: Tap the All Lines soft key. The touch screen prompts “Copy to all lines?”.
• Page 168
  User Guide for the SIP-T48S IP Phone (Optional.) Enter the no answer forward on code or off code respectively in the On Code or Off Code field. You can also enable no answer forward for all accounts. Do the following: Tap the All Lines soft key.
• Page 169
  Basic Call Features If you enable call forward for the default account, the associated line icon will change to and the icon will appear on the status bar. If you enable call forward for the non-default account, only the associated line icon will change If you enable call forward for all accounts, all line icons will change to , and the icon will appear on the status bar.
• Page 170
  User Guide for the SIP-T48S IP Phone If the forward on code or off code is configured, the IP phone sends the corresponding code to the server when a certain action takes place. For example, if you set the Always Forward on code to be *71 (may vary on different servers), and the target number to be 1234.

• Page 171: Dynamic Forwarding

  Basic Call Features To disable call forward in phone mode: Do one of the following: Press when the phone is idle. ->Features->Call Forward. Tap the desired forwarding type. Tap the Off radio box. Tap the Save soft key to accept the change. To disable call forward in custom mode: ->Features->Call Forward or press when the phone is idle.

• Page 172: Call Transfer

  User Guide for the SIP-T48S IP Phone Call Transfer You can transfer a call to another party during a call in one of three ways: Blind Transfer: Transfer a call directly to another party without consulting.  Semi-Attended Transfer: Transfer a call when the target phone is ringing.

• Page 173: Semi-Attended Transfer

  Basic Call Features To perform a blind transfer to exist call: Press or tap the Transfer soft key during a call. Tap the desired hold call you want to transfer the call to on the left side. The call is then connected to the call to which you are transferring. Semi-attended Transfer Before performing a semi-attended transfer (except you use dial number method), make sure that the transfer mode on DSS key is configured as New Call or Attended Transfer.

• Page 174: Attended Transfer

  User Guide for the SIP-T48S IP Phone Attended Transfer Before performing an attended transfer (except you use dial number method), make sure that the transfer mode on DSS key is configured as New Call or Attended Transfer. For more information on how to configure it, refer to…

• Page 175: Conference

  Contact your server administrator for more information. Conference You can use the SIP-T48S IP phone to create a conference with other two parties using the phone’s local conference or create a conference with multiple participants which is called network conference.

• Page 176
  User Guide for the SIP-T48S IP Phone When the first party answers the call, tap the Conference soft key to place a new call. The active call is placed on hold. Enter the number of the second party, and then press , or tap Conference.

• Page 177: Network Conference

  Tap the End Call soft key to drop the conference call. Network Conference You can use network conference feature on the SIP-T48S IP phone to conduct a conference with multiple participants. This feature allows you to perform the following: Join two calls together into a conference call.

• Page 178: Call Park

  User Guide for the SIP-T48S IP Phone Click Confirm to accept the change. Note Network conference is configurable via web user interface only. To set up a network conference call: Place a call to the first party. Tap the Conference soft key to place a new call.

• Page 179: Fac Mode

  Basic Call Features You need to configure the call park code and park retrieve code before using call park feature. You can also configure a call park key and retrieve key. For more information, refer to DSS Keys on page 106. The call park code and call park retrieve code are predefined on the system server.

• Page 180
  User Guide for the SIP-T48S IP Phone To park a call in FAC mode: During a call, tap the Park soft key (You may need to tap the More soft key to see the Park soft key) or press the call park key (if configured).

• Page 181: Transfer Mode

  Basic Call Features If the call is parked successfully, you will hear a voice prompt confirming that the call is parked. The call is parked against the extension you entered. To retrieve a parked call in FAC mode: Do one of the following: If the park retrieve code is not configured, dial the park retrieve code (e.g., *88).

• Page 182
  User Guide for the SIP-T48S IP Phone It is configured for the Retrieve soft key. This park retrieve code will also apply to the retrieve key. Click Confirm to accept the change. Note If the Park or Retrieve soft key doesn’t appear on the LCD screen, please select Disabled from the pull-down list of Custom Softkey via web user interface at path Settings->Softkey…

• Page 183: Call Pickup

  The phone will retrieve the parked call from the shared parking lot. Call Pickup You can use call pickup to answer someone else’s incoming call on your phone. The SIP-T48S IP phone supports directed call pickup and group call pickup. Directed call pickup is used for picking up a call that is ringing at a target phone number.

• Page 184: Directed Call Pickup

  User Guide for the SIP-T48S IP Phone Directed Call Pickup To enable directed call pickup and configure the directed call pickup code on a global basis via web user interface: Click on Features->Call Pickup. Select Enabled from the pull-down list of Directed Call Pickup.

• Page 185
  Basic Call Features Enter the directed call pickup code in the Directed Call Pickup Code field. Click Confirm to accept the change. To pick up a call directly: Pick up the handset, tap the line key or press the Speakerphone key. The DPickup appears on the on-screen keypad.

• Page 186: Group Call Pickup

  User Guide for the SIP-T48S IP Phone Group Call Pickup To enable group call pickup and configure the group call pickup code on a global basis via web user interface: Click on Features->Call Pickup. Select Enabled from the pull-down list of Group Call Pickup.

• Page 187
  Basic Call Features Enter the group call pickup code in the Group Call Pickup Code field. Click Confirm to accept the change. To pick up a call in the group: Pick up the handset, tap the line key or press Speakerphone key. The GPickup appears on the on-screen keypad.

• Page 188: Anonymous Call

  User Guide for the SIP-T48S IP Phone You can also configure a DSS key as a group pickup key via phone user interface or web user interface. Once configured, you can pick up a call by tapping the group pickup key directly. For…

• Page 189: Anonymous Call Rejection

  Basic Call Features Tap the Save soft key to accept the change or to cancel. Anonymous call is configurable via web user interface at the path Account->Basic. To place an anonymous call: Using the specific line on the phone to place a call to phone B. The touch screen of phone B prompts an incoming call from anonymity.

• Page 190
  User Guide for the SIP-T48S IP Phone The phone will send the configured on code or off code depending on your selection when you enable or disable anonymous call rejection feature on the phone. Tap the Save soft key to accept the change or to cancel.

• Page 191: Advanced Phone Features

  Advanced Phone Features Advanced Phone Features This chapter provides operating instructions for the advanced features of the SIP-T48S IP phone. Topics include: Busy Lamp Field (BLF)  BLF List  Call Recording  Hot Desking  Intercom  Multicast Paging …

• Page 192
  User Guide for the SIP-T48S IP Phone (Optional.) Enter the string that will appear on the touch screen in the Label field. Enter the phone number or extension you want to monitor in the Value field. (Optional.) Enter the directed call pickup code in the Extension field.
• Page 193
  Advanced Phone Features Select Enabled from the pull-down list of Audio Alert for BLF Pickup. Click Confirm to accept the change. Note Visual and audio alert features are configurable via web user interface only. When the monitored line receives an incoming call, the following occurs on your phone: The phone plays a specific ring tone (if enabled).
• Page 194
  User Guide for the SIP-T48S IP Phone Tap the New Call soft key to place a new call. Tap the Cancel soft key to exit the screen. Note If your phone is locked, you cannot use the DPickup, Send, New Call and Cancel soft keys until unlocked.
• Page 195
  Advanced Phone Features To configure the directed call pickup code on a per-line basis via web user interface: Click on Account->Advanced. Select the desired account from the pull-down list of Account. Enter the desired pickup code in the Directed Call Pickup Code field. Click Confirm to accept the change.

• Page 196: Using Blf Feature On The Ip Phone

  User Guide for the SIP-T48S IP Phone If you select New Call, tap the BLF key to place a new call to the monitored user.  Click Confirm to accept the change. Using BLF Feature on the IP Phone You can use the BLF key in the following ways: Place a call to the monitored user.

• Page 197
  Advanced Phone Features To perform a blind transfer: Tap the BLF key of the monitored user which you want to transfer this call to. Then the active call is connected to the number of the monitored user. When the transfer mode on DSS key is set to Attended Transfer and there is already an active call on the IP phone, you can do the following: To perform a semi-attended transfer: Tap the BLF key of the monitored user which you want to transfer this call to.

• Page 198: Blf List

  User Guide for the SIP-T48S IP Phone BLF List You can use the BLF List feature to monitor a list of users defined by your system administrator. For example, your system administrator enables BLF List, and creates a BLF List URI (e.g., BLFList@example.com) including a list of user1, user2 on the server.

• Page 199: Call Recording

  Call Pickup on page 173. Call Recording The SIP-T48S IP phone supports local and server recording. If you insert a USB flash drive into the USB port on your phone, you can record active calls on your phone. The recordings are…

• Page 200: Recording Using A Usb Flash Drive

  User Guide for the SIP-T48S IP Phone saved as *.wav files on your USB flash drive. You can also record active calls by tapping a record key on the phone. The recordings are saved on the server. Before recording any call, especially those involving PSTN, it is necessary to know about the rules Note and restrictions of any governing call-recording in the place you are in.

• Page 201
  Advanced Phone Features The following figure shows an example: The Start REC soft key controls the recording function, and is available: The free space of USB flash drive is sufficient  When there are one or more calls connected to your IP phone …
• Page 202
  User Guide for the SIP-T48S IP Phone The LCD screen displays the icon and recording duration. During the recording, you can do the following: Tap the More soft key, and then tap the Pause REC soft key. Then appears on the touch screen and the duration stops counting.
• Page 203
  Advanced Phone Features If there is insufficient free space (less than 30 minutes) on the USB flash drive during recording, the LCD screen prompts the following: Tap Cancel to return to the previous screen. If there is insufficient free space (less than 10 minutes) on the USB flash drive during recording, the LCD screen prompts the following: Tap the Cancel soft key to return to the previous screen.

• Page 204: Playing Back Recorded Calls

  User Guide for the SIP-T48S IP Phone To stop recording while the phone records, do one of the following: Tap the More soft key, and then tap the Stop REC soft key. The LCD screen prompts “Call has been successfully recorded on USB device”, the recording icon and recording duration disappear.

• Page 205
  Advanced Phone Features To browse the recorded files: ->USB->Browse Audio. The touch screen shows all recorded audio files in the Browse Audio list. The filename consists of the recording time & date, the other party’s number/IP address/name (or the first person’s number/IP address/name you called). Drag to scroll through the recorded files if required.
• Page 206
  User Guide for the SIP-T48S IP Phone between Speakerphone, Headset and Handset modes. If you are playing back a recorded call and an incoming call arrives on your phone, the playback will be paused and the phone rings. You can tap the Play soft key again to continue play the recoding when ending the call.

• Page 207: Recording Using A Record Key

  To view the storage space: ->USB->Storage Space. Recording Using a Record Key You can record calls by tapping a record key on the phone. The SIP-T48S IP phone supports record and URL record. Two ways of call recording: Record: The phone sends a SIP INFO message containing a specific header “Record: on/off”…

• Page 208
  User Guide for the SIP-T48S IP Phone Configuring a Record Key To configure a record key via phone user interface: Tap More. Tap the desired line key. Tap the gray box of the Type field, and then select Key Event from the pull-down list.

• Page 209: Recording A Call

  Advanced Phone Features Enter the URL (e.g., http://10.1.2.224/phonerecording.cgi) in the URL Record field. Tap the Save soft key to accept the change or to cancel. URL record key is configurable via web user interface at the path Dsskey->Line Key. Recording a Call To record a call: Tap the record key or URL record key during a call.

• Page 210: Hot Desking

  You can use hot desking on the SIP-T48S IP phone to log out of existing accounts and then log into a new account. As a result, many users can share the phone resource at different times. To use this feature, you need to configure a hot desking key in advance.

• Page 211
  Advanced Phone Features To use hot desking: Tap the hot desking key when the phone is idle. The touch screen prompts the following warning: Tap OK Registration configurations of all accounts on the phone will be cleared immediately. The login wizard will be displayed as below: Enter the login information in each field.

• Page 212: Intercom

  User Guide for the SIP-T48S IP Phone Intercom Intercom is a useful feature in an office environment to quickly connect with the operator or the secretary. You can tap the intercom key to automatically connect with a preconfigured target extension for outgoing intercom calls, and the target extension will automatically answer incoming intercom calls by default.

• Page 213: Incoming Intercom Calls

  Intercom key is configurable via web user interface at the path Dsskey->Line Key. Incoming Intercom Calls The SIP-T48S IP phone supports to automatically answer an incoming intercom call by default. The phone automatically plays a warning tone when it receives an incoming intercom call. In addition, you can enable the phone to mute the microphone when it automatically answers an incoming intercom call.

• Page 214
  User Guide for the SIP-T48S IP Phone Intercom Barge You can enable or disable the phone to automatically answer an incoming intercom call while there is already an active call on the phone. If Intercom Barge is enabled, the phone will automatically answer the intercom call and place the active call on hold.

• Page 215: Using Intercom

  Advanced Phone Features Using Intercom You can use the intercom key in the following ways: Place a call to the target extension  Pick up an incoming call of the target extension  Note To use the intercom key to pick up an incoming call, make sure the intercom subscription feature is enabled.

• Page 216: Sending Rtp Stream

  SIP signaling. You can specify up to 31 multicast listening addresses. Yealink IP phone supports the following 31 channels: 0: It is the default channel. This channel is for compatibility with the Yealink IP phones  running firmware version 80 or prior and third-party devices.
• Page 217
  Advanced Phone Features The valid channel ranges from 0 to 30. Tap the Save soft key to accept the change or to cancel. Multicast paging key is configurable via web user interface at the path Dsskey->Line Key. To configure a paging list key via phone user interface: Tap More.
• Page 218
  User Guide for the SIP-T48S IP Phone If the paging list key is not configured, you can also tap ->Features->Paging List to configure the paging list. Tap a desired paging group. The default tag is Empty if it is not configured before.
• Page 219
  Advanced Phone Features To delete a paging group via phone user interface: Tap the paging list key when the phone is idle. Tap a desired paging group. Tap the Delete soft key. Tap OK to accept the change or Cancel to cancel. If you want to delete all paging groups, you can tap the Delete All soft key.

• Page 220: Receiving Rtp Stream

  User Guide for the SIP-T48S IP Phone Click Confirm to accept the change. Note If G722 codec is used for multicast paging, the touch screen will display the icon to indicate that it is providing high definition voice. Default codec for multicast paging is configurable via web user interface only.

• Page 221: Using Multicast Paging

  Advanced Phone Features Enter the multicast IP address(es) and port number (e.g., 224.5.6.20:10008) which the phone listens to for incoming RTP multicast in the Listening Address field. (Optional.) Enter the label in the Label field. Label will appear on the touch screen when receiving the multicast RTP stream. Select the desired channel to listen from the pull-down list of Channel.

• Page 222
  User Guide for the SIP-T48S IP Phone The following figure shows a multicast RTP session on the phone: You can do the following: Tap the Hold soft key to place the current multicast RTP session on hold.  The sender’s phone places the multicast RTP session on hold and receiver’s phone releases the session.

• Page 223: Music On Hold (Moh)

  Advanced Phone Features Your can do the following: Tap the Hold soft key to place the current multicast RTP session on hold.  The sender’s phone places the multicast RTP session on hold and receiver’s phone releases the session. To resume the held multicast RTP session, tap the Resume soft key. The multicast RTP session is established again.

• Page 224: Automatic Call Distribution (Acd)

  ACD on the SIP-T48S IP phone allows the ACD system to distribute large volumes of incoming calls to the registered ACD users. To use this feature, you should configure an ACD key in advance. For…

• Page 225
  Advanced Phone Features To log into the ACD system: Tap the ACD key when the phone is idle. The touch screen prompts you the following information: User ID: the identity used to log into the queue. Password: the password used to log into the queue. Tap the Login soft key to log in.

• Page 226: Shared Call Appearance (Sca)

  User Guide for the SIP-T48S IP Phone Shared Call Appearance (SCA) You can use SCA feature to share an extension which can be registered on two or more IP phones at the same time. The shared line is indicated by a different line icon.

• Page 227: Configuring Sca Feature On The Ip Phone

  Advanced Phone Features Configuring SCA Feature on the IP Phone You can configure a primary account on the IP phone and other alternate accounts on the other IP phones. In a SCA Hybrid Key System scenario, you can automatically assign multiple DSS keys with Line type for a registered shared line on the phone (If auto linekeys feature is enabled).

• Page 228
  User Guide for the SIP-T48S IP Phone Auto LineKeys is you can automatically assign multiple DSS keys with Line enabled, type for a registered shared line on the phone. Click Confirm to accept the change. To configure the shared line settings and the number of line key on phone A via web user interface: Register the primary account 4603.
• Page 229
  Advanced Phone Features Click on Advanced, and then select Shared Call Appearance from the pull-down list of Shared Line. Enter the desired number in the Number of line key field. This field appears only if Auto Linekeys is enabled. The default value is 1. In this example, the value is set to 2. Click Confirm to accept the change.
• Page 230
  User Guide for the SIP-T48S IP Phone (Enter the primary account 4603 in the Register Name field.) Click on Advanced, and then select Shared Call Appearance from the pull-down list of Shared Line. Enter the desired number in the Number of line key field.
• Page 231
  Advanced Phone Features Click Confirm to accept the change. The phone B will automatically configure the line keys from the first unused DSS key, according to the configured number in the Number of line key field. Configuring private hold soft key or private hold key Public hold allows any shared line to retrieve the held call.
• Page 232
  User Guide for the SIP-T48S IP Phone (Optional.) Enter the string that will appear on the touch screen in the Label field. Tap the Save soft key to accept the change or to cancel. Configuring call pull feature Call pull feature allows users to retrieve an existing call from another shared phone that is in active or public hold status.

• Page 233: Using Sca Feature On The Ip Phone

  Using SCA Feature on the IP Phone This section provides you with detailed information on using the SIP-T48S IP phone in a SCA Hybrid Key System scenario. In a SCA Hybrid Key System scenario, the status of the line key icon which associates with a shared line will change.

• Page 234
  You can answer the incoming call on either phone A or phone B. The touch screen of phone A displays the information of the incoming call (e.g., “Incoming Call: pbx.yealink.com”). Make sure call waiting feature is enabled on phone A. For more information, refer to…
• Page 235
  Advanced Phone Features Tap the Answer soft key. Phone B stops ringing. Tap the incoming call item. Press or tap the Answer soft key. Phone B stops ringing. The incoming call is answered and the original call is placed on hold. The icon indicators of the line key 1 on phone A and phone B will become and solid indicating that there is the held call on the line key 1.
• Page 236
  User Guide for the SIP-T48S IP Phone To place a call on private hold: Tap the PriHold soft key or private hold key on phone A when there is an active call on the shared line (You may need to tap the More soft key to see the PriHold soft key).
• Page 237
  Advanced Phone Features The Cancel, Call Pull, New Call and Retrieve soft keys appear on the touch screen. Tap the Retrieve soft key to retrieve the call. The conversation is established between phone B and phone C, phone A disconnects the call. And the line key icon on phone A and phone B will become To retrieve a call placed on private hold: The private held call can be only retrieved by the hold party (party A).
• Page 238
  User Guide for the SIP-T48S IP Phone The Cancel, Call Pull, New Call and Barge In soft keys appear on the touch screen of phone B. Tap the Barge In soft key to interrupt the active call of phone A.
• Page 239
  Advanced Phone Features The Cancel, Call Pull, New Call and Barge In soft keys appear when the active call is highlighted. Tap the Barge In soft key to interrupt the active call of phone A. Party B may hear a warning tone and then set up a conference call with the other parties of the active call.

• Page 240: Bridged Line Appearance (Bla)

  User Guide for the SIP-T48S IP Phone The Cancel, Call Pull, New Call and Barge In soft keys appear on the touch screen of phone B. Tap the Call Pull soft key. The active call has been retrieved from the phone A successfully.

• Page 241: Configuring Bla Feature On The Ip Phone

  Advanced Phone Features Any IP phone can be used to originate or receive calls on the bridged line. An incoming call to the BLA number can be presented to multiple phones in the group simultaneously. The incoming call can be answered on any IP phone of the group but not all. Configuring BLA Feature on the IP Phone You can share a BLA number on two or more phones.

• Page 242
  User Guide for the SIP-T48S IP Phone To register an account and configure BLA feature on phone A via web user interface: Register the account 14019833020. Click on Advanced, and then select Draft BLA from the pull-down list of Shared Line.
• Page 243
  Advanced Phone Features Register the account 10462190020. Click on Advanced, and then select Draft BLA from the pull-down list of Shared Line. Enter the desired number in the BLA Number field. Click Confirm to accept the change.

• Page 244: Using Bla Feature On The Ip Phone

  Using BLA Feature on the IP Phone This section provides you with detailed information on using the SIP-T48S IP phone in a BLA scenario. In a BLA scenario, the status of the line key icon which associates with a bridged line will change.
• Page 245
  Advanced Phone Features Answering Calls When the phone C dials the BLA number “14084588327”, an incoming call will arrive on the bridged line. The phone A and phone B ring simultaneously. You can answer the incoming call on either phone A or phone B but not both. Do one of the following on phone A or phone B: Press or tap the Answer soft key on phone A.

• Page 246: Messages

  Messages Short Message Service (SMS) You can send and receive text messages using the SIP-T48S IP phone. New text messages can be indicated both acoustically and visually. When receiving a new text message, the phone will play a warning tone. The power indicator LED will slowly flash red, and the touch screen will prompt “n New Text Message(s)”…

• Page 247
  Advanced Phone Features To read a text message: ->Message->Text Message->Inbox. Tap the desired text message to read. If the phone prompts receiving new text messages, you can also tap View to read the new Note messages directly. To send a text message: ->Message->Text Message->New Message.
• Page 248
  User Guide for the SIP-T48S IP Phone Sending a text message via web user interface at the path Features->SMS. is configurable To reply a text message: ->Message->Text Message->Inbox. Select the desired message and then tap the Reply soft key. Compose the new text message.

• Page 249: Voice Mail

  Voice Mail You can leave voice mails for someone else using the SIP-T48S IP phone. You can also listen to the voice mails that are stored in a voice mailbox. This feature is set up on the server side. It is not available on all servers.

• Page 250
  User Guide for the SIP-T48S IP Phone If the voice mail pop-up message box disappears, it won’t pop up again unless the user receives a new voice mail or the user re-registers the account that has unread voice mail(s). Note You can configure the phone not to display the pop-up prompt, contact your system administrator for more information.

• Page 251: Message Waiting Indicator (Mwi)

  LED slowly flashes red. This will be cleared when you retrieve all voice mails or delete them. The MWI service is unsolicited for some servers, so the SIP-T48S IP phone only handles the MWI messages sent from the server. But for other servers, the MWI service is solicited, so the SIP-T48S IP phone must enable subscription for MWI.

• Page 252
  User Guide for the SIP-T48S IP Phone The MWI subscription parameters you need to know: Options Description Enable or disable a subscription for MWI service. Subscribe for MWI Period of MWI subscription. The IP phone sends a refresh MWI Subscription Period SUBSCRIBE request before initial subscription expires.
• Page 253
  Advanced Phone Features To enable subscribe MWI to voice mail via web user interface: Click on Account->Advanced. Select the desired account from the pull-down list of Account. Select Enabled from the pull-down list of Subscribe for MWI. Select Enabled from the pull-down list of Subscribe MWI To Voice Mail. Enter the desired voice mail number in the Voice Mail field.
• Page 254
  User Guide for the SIP-T48S IP Phone…

• Page 255: Regulatory Notices

  Without prior written consent, no organization or individual is permitted to make  any change to the structure or the safety design of the device. Yealink is under no circumstances liable to consequences or legal issues caused by such changes.

• Page 256
  User Guide for the SIP-T48S IP Phone Please do not place heavy objects on the device in case of damageand deformation  caused by the heavy load. Keep at least 10 cm between the device and the closest object for heat dissipation.

• Page 257: Appendix

  Appendix Appendix Appendix A – Time Zones Time Zone Time Zone Name Samoa United States-Hawaii-Aleutian, United States-Alaska-Aleutian -9:30 French Polynesia United States-Alaska Time Canada(Vancouver,Whitehorse), Mexico(Tijuana,Mexicali), United States-Pacific Time Canada(Edmonton,Calgary), Mexico(Mazatlan,Chihuahua), United States-MST no DST, United States-Mountain Time Canada-Manitoba(Winnipeg), Chile(Easter Islands), Mexico(Mexico City,Acapulco), United States-Central Time Bahamas(Nassau), Canada(Montreal,Ottawa,Quebec), Cuba(Havana), United States-Eastern Time…

• Page 258
  User Guide for the SIP-T48S IP Phone Time Zone Time Zone Name +9:30 Australia(Adelaide), Australia(Darwin) Australia(Brisbane), Australia(Hobart), Australia(Sydney,Melboume,Canberra), Russia(Vladivostok) +10:30 Australia(Lord Howe Islands) New Caledonia(Noumea), Russia(Srednekolymsk Time) +11:30 Norfolk Island New Zealand(Wellington,Auckland), Russia(Kamchatka Time) +12:45 New Zealand(Chatham Islands) Tonga(Nukualofa) +13:30…

• Page 259: Appendix B — Menu Structure

  Appendix Appendix B – Menu Structure…

• Page 260
  User Guide for the SIP-T48S IP Phone…

• Page 261: Index

  Index Index Call Mute About This Guide Call History Management Account Management Call Hold/Resume Account Registration Call Park Activating the Bluetooth Mode Call Pickup Activating the Wi-Fi Mode Call Recording Adding a Contact to the Local Call Transfer Directory/Blacklist Call Waiting Adding Contacts CE Mark Warning Adding Groups…

• Page 262
  User Guide for the SIP-T48S IP Phone Disconnecting the Wireless Network Connection Keep Mute Do Not Disturb (DND) Key As Send Documentation Key Tone Dual Headset DSS Keys DSSkey Wallpaper Dynamic Forwarding Label Length Language LED Instructions Limitation of Liability…
• Page 263
  Index Packaging Contents Touch Screen Display Pairing and Connecting the Bluetooth Headset Time & Date Transparency Phone Initialization Phone Installation Phone Lock User Interfaces Phone Status Using BLA Features on the IP Phone Phone User Interface Using Intercom Picking up an Incoming Call of the Target Using Multicast Paging Extension Using SCA Features on the IP Phone…