Yealink SIP-T48S User Manual
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Yealink SIP-T48S User Manual

T4 series; t4x series;
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Summary of Contents for Yealink SIP-T48S

  • Page 2: End User License Agreement

    Yealink and/or its respective suppliers are not responsible for the suitability of the information contained in this doc- ument for any reason. The information is provided “as is”, and Yealink does not provide any warranty and is subject to change without notice. All risks other than risks caused by use of the information are borne by the recipient. In no...

  • Page 3: Patent Information

    We are striving to improve our documentation quality and we appreciate your feedback. Email your opinions and com- ments to DocsFeedback@yealink.com. Technical Support Visit Yealink WIKI (http://support.yealink.com/) for the latest firmware, guides, FAQ, Product documents, and more. For better service, we sincerely recommend you to use Yealink Ticketing system (https://ticket.yealink.com) to submit all your technical issues.

  • Page 4: Gnu Gpl Information

    Yealink T4X series IP phones firmware contain 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: Table Of Contents

    Table of Contents Table of Contents Table of Contents About This Guide Related Documentation In This Guide Getting Started with Your Phone Hardware Overview T48S/T48G Hardware T46S/T46G/T42S/T42G/T41S/T41P/T40P/T40G Hardware Power LED Indicator Line Key LED Screen and Icons Idle Screen Dialing/Pre-dialing Screen Calls Screen Icons in the Status Bar T48S/T48G Icons in the Status Bar...
  • Page 6 Yealink T4 Series IP Phones User Guide Changing the Waiting Time for Screen Saver Enabling/Disabling Time & Date and Status Icons Display Adding a Screen Saver from a USB Flash Drive Setting the Screen Saver Type Changing the Screen Backlight Brightness and Time...
  • Page 7 Table of Contents Adding a Favorite from Local Directory Adding a Favorite while Adding a Contact Viewing Favorites Reordering Favorites Deleting Favorites Deleting a Favorite by Removing a Contact from Favorites Directory Deleting a Favorite by Deleting the Favorite Index Number Blacklist Managing the Blacklist Contacts Adding a Blacklist Contact...
  • Page 8 Yealink T4 Series IP Phones User Guide Placing an International Call Placing a Call from the Call History Placing a Call from the Directory Placing an Anonymous Call Enabling Anonymous Call Placing a Anonymous Call Answering Calls Answering a Call...
  • Page 9 Table of Contents Performing Transfer with a Transfer Key Setting a Transfer Key Performing a Blind Transfer Using a Transfer Key Performing a Semi-Attended/Attended Using a Transfer Key Conference Calls Local Conference Setting Up a Local Conference Call Joining Two Calls in a Conference Joining a Transfer Target and a Transferee into a Conference Holding/Resuming a Conference Call Muting/Unmuting a Conference Call...
  • Page 10 Yealink T4 Series IP Phones User Guide Picking up a Group Call Picking up a Call with a Directed Pickup Key Setting a Directed Pickup Key Directed Picking up a Call Using a Directed Pickup Key Picking up a Call with a Group Pickup Key...
  • Page 11 Table of Contents Placing Calls on a Shared line Answering Calls on a Shared line Placing a Call on Hold on a Shared Line Placing a Call on Public Hold Placing a Call on Private Hold Setting a Private Hold Key Holding a Call Privately Retrieving a Held Call Remotely on a Shared line Barging In an Active Call on a Shared line...
  • Page 12 Yealink T4 Series IP Phones User Guide Using Headsets Activating the Headset Mode Deactivating the Headset Mode Bluetooth Connecting the Bluetooth USB Dongle BT40 Activating the Bluetooth Mode Deactivating the Bluetooth Mode Using Bluetooth Feature Pairing and Connecting the Bluetooth Headset...
  • Page 13 Table of Contents For the SIP-T46S/T46G IP Phone For the SIP-T42S/T42G/T41S/T41P/T40P/T40G IP Phone...
  • Page 14 Yealink T4 Series IP Phones User Guide...

  • Page 15: About This Guide

    About This Guide Thank you for choosing Yealink T4 series IP phones, which deliver the industry’s leading HD audio quality and a wide range of business telephony features, such as Call Hold, Call Transfer, Busy Lamp Field, Call Recording, Multicast Paging and Conference over an IP network.

  • Page 16: In This Guide

    Yealink T4 Series IP Phones User Guide Wall Mount Installation Guide, which provides detailed instructions for how to use an optional wall mount bracket to mount your phone on the wall. Administrator Guide, which provides the detailed information on how to configure phone features for system admin- istrator.

  • Page 17: Getting Started With Your Phone

    This chapter provides the overview of phone hardware and screen layout, and how to navigate your phone for the best performance. Topics Hardware Overview Screen and Icons Entering Characters on T46S/T46G/T42S/T42G/T41S/T41P/T40P/T40G Entering Characters on T48S/T48G Hardware Overview Yealink T4 series IP phone has distinct hardware types: Hardware T42G/T41P/T40P/T40G T42S/T41S T46S/T46G T48S/T48G Color Screen...

  • Page 18: T48S/T48G Hardware

    Yealink T4 Series IP Phones User Guide T48S/T48G Hardware Item Description Power LED Indicator Indicates call status, message status and phone’s system status. Touch Screen Enables you to navigate menus and select items on the touch-sensitive screen. Toggles the headset on or off. The LED indicator glows green when the headset is activ- HEADSET Key ated.

  • Page 19: T46S/T46G/T42S/T42G/T41S/T41P/T40P/T40G Hardware

    Reversible Tab more information on how to adjust the reversible tab, refer to Yealink Wall Mount Quick Installation Guide for Yealink IP Phones Connects or disconnects the phone from the phone line. The hookswitch is auto- Hookswitch matically activated when a user lifts the handset from the cradle to get a dial tone.

  • Page 20: Power Led Indicator

    The phone enters power-saving mode. Solid red for 500ms and off for 3000ms alternately. It is only available on the SIP-T48S/T48G/T46S/T46G IP phone. Note The above introduces the default LED status. Your system administrator can configure the status of the power LED indicator.
  • Page 21 Getting Started with Your Phone LED Status Description The line is seized. Solid green The line is in conversation. Fast-flashing green The line receives an incoming call. Slow-flashing green The call is placed on hold. The line is inactive. Line key LED (configured as a Forward key with a value (destination number)) LED Status Description Solid green...

  • Page 22: Screen And Icons

    Yealink T4 Series IP Phones User Guide LED Status Description The shared line is idle. Fast-flashing green The shared line receives an incoming call. The shared line is busy or is in a call. Solid green (Local SCA Phone) The shared line is dialing.
  • Page 23 Getting Started with Your Phone SIP-T48S/T48G SIP-T46S/T46G SIP-T42S/T42G/T41S/T41P SIP-T40P/T40G Status Bar: Display the default account, feature status icons, and the time. The status icons display when features are actived. Line Keys: Display the information associated with the line and feature keys on the phone.

  • Page 24: Dialing/Pre-Dialing Screen

    Soft Keys: Each soft key label indicates the action for the soft key below the screen. More Key: Tap to display more line keys on the SIP-T48S/T48G IP phone. Shortcut and Main Menu: Tap to access the shortcut or enter the main menu.

  • Page 25: Calls Screen

    On the SIP-T48S/T48G IP phone, you can tap the call status bar to switch among calls. The call status bar displays call status, contact name/number and call duration. When there is an active call and a held call, the Calls screen on the SIP-...

  • Page 26: T48S/T48G Icons In The Status Bar

    Yealink T4 Series IP Phones User Guide T48S/T48G Icons in the Status Bar Icons Description Wired network is unavailable Speakerphone (hands-free) mode Handset mode Headset mode Voice Mail Text Message Auto Answer Do Not Disturb (DND) Keep Mute Ringer volume is 0...

  • Page 27: T46S/T46G Icons In The Status Bar

    Getting Started with Your Phone Icons Description Bluetooth mode is on Bluetooth headset is both paired and con- nected Bluetooth-Enabled mobile phone is both paired and connected Wi-Fi connection is successful Wi-Fi connection fails T46S/T46G Icons in the Status Bar Icons Description Wired network is unavailable...

  • Page 28: T41S/T41P/T42S/T42G Icons In The Status Bar

    Yealink T4 Series IP Phones User Guide Icons Description Missed Calls Call Forward Recording starts successfully (Using a USB flash drive) Recording is paused (Using a USB flash drive) Bluetooth mode is on Bluetooth headset is both paired and con-...

  • Page 29: T40P/T40G Icons In The Status Bar

    Getting Started with Your Phone Icons Description Missed Calls Call Forward Recording starts successfully (Using a USB (SIP-T42S/T41S) flash drive) Recording is paused (Using a USB flash drive) (SIP-T42S/T41S) T40P/T40G Icons in the Status Bar Icons Description Wired network is unavailable speakerphone (hands-free) mode Handset mode Headset mode...
  • Page 30 Yealink T4 Series IP Phones User Guide Topics T48S/T48G Line Key Icons T46S/T46G Line Key Icons T41S/T41P/T42G/T42S Line Key Icons T40P/T40G Line Key Icons Icon indicators (associated with line key features): Icons Description Hold/Public Hold Private Hold Voice Mail Direct Pickup...
  • Page 31 Getting Started with Your Phone Icons Description Phone Lock Directory Speed Dial Icon indicators (associated with line) Icons Description The private line registers successfully The shared/bridged line registers successfully Registering Register failed DND is enabled on this line Call forward is enabled on this line Icon indicators (associated with call park/retrieve park) Icons Description...
  • Page 32 Yealink T4 Series IP Phones User Guide Icons Description Target extension is ringing. Target extension is dialing or in a call. Target extension fails to register. Icon indicators (associated with ACD) Icons Description Log in Available Wrap up Unavailable Log out...

  • Page 33: T48S/T48G Line Key Icons

    Getting Started with Your Phone Icons Description The bridged line is idle. The bridged line is seized. (for monitoring BLA phone) The bridged line receives an incoming call. The bridged line is dialing. The bridged line is busy or is in a call. The call on bridged line is placed on hold.
  • Page 34 Yealink T4 Series IP Phones User Guide Icons Description Transfer ReCall Record URL Record Recording in process (Record/URL Record) Multicast Paging Group Listening Paging List Hot Desking Zero Touch Phone Lock Directory Speed Dial Icon indicators (associated with call park/retrieve park)
  • Page 35 Getting Started with Your Phone Icons Description Target extension is available. Target extension is ringing. Target extension is dialing. Callout Target extension is busy or is in a call. Talking Target extension registers failed. Icon indicators (associated with ACD) Icons Description Log in Available...

  • Page 36: T46S/T46G Line Key Icons

    Yealink T4 Series IP Phones User Guide The Local BLA Phone is involved in a BLA call, while the Monitoring BLA Phone is not involved in a BLA call and used for monitoring bridged line. Icons Description The bridged line is idle.
  • Page 37 Getting Started with Your Phone Icons Description Conference Forward Transfer 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 indicators (associated with call park/retrieve park) Icons Description Park successfully/Idle state...
  • Page 38 Yealink T4 Series IP Phones User Guide Icons Description Target extension is available. Target extension is ringing. Target extension is dialing. Target extension is busy or is in a call. Target extension fails to register. Icon indicators (associated with ACD)

  • Page 39: T41S/T41P/T42G/T42S Line Key Icons

    Getting Started with Your Phone Icons Description The bridged line is idle. The bridged line is seized. (Monitoring BLA Phone) The bridged line receives an incoming call. The bridged line is dialing. The bridged line is busy or is in a call. The call on bridged line is placed on hold.

  • Page 40: Call History Icons

    Yealink T4 Series IP Phones User Guide Icons Description Log in Available Wrap up and x Unavailable Call History Icons Topics T48S/T48G Call History Icons T46S/T46G Call History Icons T42S/T42G/T41S/T41P/T40P/T40G Call History Icons T48S/T48G Call History Icons Icons Description Received Calls...

  • Page 41: Entering Characters On T48S/T48G

    Entering Characters on T48S/T48G SIP-T48S/T48G IP phone provides onscreen keyboard, phone keypad and dial pad to enter data. Keypad and dial pad provides standard key layout, which enables users to use existing or familiar key positions. You can enter characters using the onscreen keyboard, phone keypad or dial pad.

  • Page 42: Using The Phone Keypad And Dial Pad

    Yealink T4 Series IP Phones User Guide Task Action If there is only one field or the field you are editing is the last one of the configuration, tap  to confirm the setting. Confirm the settings/Go to the next field.

  • Page 43: Customizing Your Phone

    3. Press Save. Wallpaper Yealink SIP-T48S/T48G/T46S/T46G IP phones support wallpaper. The IP phone comes with a default picture, you can change it to another built-in picture. You can also add personal pic- tures as wallpapers using a USB flash drive.

  • Page 44: Changing Idle Screen Wallpaper

    3. Press Save. Changing Dsskey Screen Wallpaper You can change the wallpaper that is displayed when unfolding the line key list on the SIP-T48S/T48G IP phone. Tap More when the phone is idle to unfold the line key list. Procedure 1.

  • Page 45: Adding A Dsskey Screen Wallpaper From A Usb Flash Drive

    The phone wallpaper will change to the selected picture. Adding a Dsskey Screen Wallpaper from a USB Flash Drive When you set a picture in USB flash drive as dsskey screen wallpaper on the SIP-T48S/T48G IP phone, the picture is added to the Wallpaper list.

  • Page 46: Screen Saver

    Yealink T4 Series IP Phones User Guide Screen Saver The screen saver will automatically start when the IP phone is idle for the preset waiting time. You can stop the screen saver at any time by pressing any key. When your phone is idle again for a preset waiting time, the screen saver starts again.

  • Page 47: Enabling/Disabling Time & Date And Status Icons Display

    Customizing Your Phone Enabling/Disabling Time & Date and Status Icons Display For the SIP-T48S/T48G/T46S/T46G IP phone, you can enable or disable your phone to display Time & Date and Status Icons on the screen saver. Before You Begin You cannot enable Time & Date and status icons display if your system administrator has set your phone to display cus- tom information on the screen saver.

  • Page 48: Setting The Screen Saver Type

    Active Level: The brightness level of the LCD screen when the phone is active. Digits (1-10) represent different bright- ness levels. 10 is the brightest level. It is only available for the SIP-T48S/T48G/T46S/T46G IP phone. Inactive Level: The brightness of the LCD screen when the phone is inactive. You can select a low brightness or turn off the backlight.

  • Page 49: Adjusting The Screen Contrast

    For the SIP-T42S/T42G/T41S/T41P/T40P/T40G IP phone, navigate to Menu->Settings->Basic Settings->Display- >Backlight. 2. For the SIP-T48S/T48G/T46S/T46G IP phone, select the desired level from the Active Level field. 3. For the SIP-T48S/T48G/T46S/T46G IP phone, select the desired value from the Inactive Level field.

  • Page 50: Changing The Date Format

    Yealink T4 Series IP Phones User Guide 1. Navigate to Menu->Basic->Time & Date->General->Manual Settings. For the SIP-T48S/T48G IP phones, navigate to Menu->Basic->Time & Date->General. And then select Manual Set- tings from the pull-down list of Type. For the SIP-T42S/T42G/T41S/T41P/T40P/T40G IP phone, navigate to Menu->Settings->Basic Settings->Time &...

  • Page 51: Customizing The Soft Keys

    Customizing Your Phone For the SIP-T42S/T42G/T41S/T41P/T40P/T40G IP phone, navigate to Menu->Features->Key As Send. 2. Select # or * from the Key As Send field, or select Disabled to disable this feature. 3. Press Save. Customizing the Soft Keys You can customize the function of the soft keys displayed in the bottom of the Idle screen for the SIP- T42S/T42G/T41S/T41P/T40P/T40G IP phone.

  • Page 52: Setting The Phone Lock

    4. Select Enabled from the Lock Enable field. 5. Select a desired type from the Lock Type field (except the SIP-T48S/T48G IP phone). 6. Enter the desired interval between 0 and 3600 (seconds) of automatic phone lock in the Auto Lock field.

  • Page 53: Changing Your Phone Unlock Pin

    Customizing Your Phone Changing Your Phone Unlock PIN The default unlock PIN is 123. You can change your unlock PIN at any time for security reasons. Procedure 1. Navigate to Menu->Basic->Change PIN. For the SIP-T42S/T42G/T41S/T41P/T40P/T40G IP phone, navigate to Menu->Settings->Basic Settings->Change PIN.
  • Page 54 Yealink T4 Series IP Phones User Guide...

  • Page 55: Audio Settings

    Audio Settings Audio Settings You can control certain audio settings on your phone, including adjusting the audio volume, setting a ring tone and key tone. Topics Adjusting the Volume Setting the Ring Tone Setting the Key Tone Adjusting the Volume You can adjust the volume of audio during a call or when playing an audio file, and adjust the volume of phone ring- tone.

  • Page 56: Setting A Ring Tone For The Phone

    Yealink T4 Series IP Phones User Guide You can also choose a unique ring tone for the different accounts on your phone. The ring tones is used according to the priority: Contact ring tone>Group ring tone>Account ring tone >Phone ring tone.

  • Page 57: Setting A Ring Tone For A Group

    On the SIP-T48S/T48G IP phone, tap Directory or navigate to Menu->Directory. 2. Highlight a desired group. On the SIP-T48S/T48G IP phone, tap Setting, and then select the desired group. 3. Press Option, and then select Detail. On the SIP-T48S/T48G IP phone, tap after the group name.

  • Page 58: Setting The Key Tone

    Yealink T4 Series IP Phones User Guide Setting the Key Tone You can set the phone to produce a sound when pressing the keypad keys. The key tone is enabled by default. Procedure 1. Navigate to Menu->Basic->Sound->Key Tone. For the SIP-T42S/T42G/T41S/T41P/T40P/T40G IP phone, navigate to Menu->Settings->Basic Settings->Sound- >Key Tone.

  • Page 59: Directory

    Directory Directory The Yealink IP phone provides several types of phone directories, depending on the phone models and what the sys- tem administrator has set up for you. The phone provides the following types of directories by default: Local Directory...

  • Page 60: Editing Contact Groups

    On the SIP-T48S/T48G IP phone, tap Directory or navigate to Menu->Directory. 2. Highlight a desired group. On the SIP-T48S/T48G IP phone, tap Setting, and then select the desired group. 3. Press Option, and then select Detail. On the SIP-T48S/T48G IP phone, tap after the group name.

  • Page 61: Editing Contacts

    5. Select the desired account from the Account field. 6. Select the desired ring tone from the Ring field. 7. On the SIP-T48S/T48G/T46S/T46G IP phone, select a desired photo from the Photo field. 8. Press Save. On the SIP-T42S/T42G/T41S/T41P/T40P/T40G IP phone, press Add.

  • Page 62: Deleting A Contact

    2. Enter the desired contact group. 3. Press Option, and then select Delete All. On the SIP-T48S/T48G IP phone, tap Setting, and then tap the checkbox of Select All. Tap Delete. A confirmation message is displayed, confirming that you want to delete all contacts.

  • Page 63: Favorites

    Directory 1. Press Directory (Dir) or navigate to Menu->Directory->Local Directory to enter the local directory. On the SIP-T48S/T48G IP phone, tap Directory or navigate to Menu->Directory->All Contacts. 2. Press Search. 3. Enter a few continuous characters of the contact name or continuous numbers of the contact number (office, mobile or other number).

  • Page 64: Adding A Favorite While Adding A Contact

    5. Press OK to automatically accept an index number or press Edit to enter an index number (1-999999999). On the SIP-T48S/T48G IP phone, tap OK automatically accept an index number. Or tap Cancel, and then enter an index number (1-999999999) in the Favorites Index field.

  • Page 65: Reordering Favorites

    You can change the order in which your favorites display on the idle screen or in the favorites directory. Procedure 1. Navigate to Menu->Directory->Favorites to enter the favorites directory. On the SIP-T48S/T48G IP phone, you can also tap Directory->Favorites. 2. Highlight a desired contact, and then press Option. Select Detail. On the SIP-T48S/T48G IP phone, tap after the desired entry.

  • Page 66: Blacklist

    Adding a Blacklist Contact Procedure 1. Navigate to Menu->Directory->Blacklist. On the SIP-T48S/T48G IP phone, you can also tap Directory->Blacklist. 2. Press Add. 3. Enter the blacklist contact’s name and the office, mobile or other numbers in the corresponding fields. 4. Select the desired account from the Account field.

  • Page 67: Deleting A Blacklist Contact

    On the SIP-T48S/T48G IP phone, you can also tap Directory->Blacklist. 2. Press Option, and then select Delete All. On the SIP-T48S/T48G IP phone, tap Setting, and then tap the checkbox of Select All. Tap Delete. A confirmation message is displayed, confirming that you want to delete all contacts.

  • Page 68: Adding A Mobile Contact To The Local Directory/Blacklist

    Procedure 1. Navigate to Menu->Directory->Mobile Contacts to enter the local directory. On the SIP-T48S/T48G IP phone, tap Directory or navigate to Menu->Directory->Mobile Contacts. 2. Press Search. 3. Enter a few continuous characters of the contact name or continuous numbers of the contact number (office,...

  • Page 69: Updating The Mobile Contacts

    Procedure 1. Navigate to Menu->Directory->Mobile Contacts. 2. Press Option, and then select Update. For the SIP-T48S/T48G IP phone, tap Update. The LCD screen prompts “Updating, please wait…”. Note If you disconnect the mobile phone from IP phone when the IP phone is updating the Mobile Contacts, the LCD screen will prompt “Fail to download mobile contacts!”, and the mobile contacts will disappear from the IP phone directory list.

  • Page 70: Searching For Remote Phone Book Contacts

    Yealink T4 Series IP Phones User Guide On the SIP-T48S/T48G IP phone, you can also tap Directory->Remote Phone Book. 2. Select the desired remote phone book. 3. Highlight a desired contact, and then press Option. On the SIP-T48S/T48G IP phone, tap after the desired contact.

  • Page 71: Call History

    3. Highlight a desired entry, and then press Option. On the SIP-T48S/T48G IP phone, tap after the desired entry. 4. Select Add to Contact (or Add to Blacklist). On the SIP-T48S/T48G IP phone, tap Add (or Blacklist). 5. Edit the corresponding fields. 6. Press Save. Deleting History Records You can delete a call record or all call records from the call history list.

  • Page 72: Deleting A Call Record

    2. Select a desired list. 3. Press Option, and then select Delete All. On the SIP-T48S/T48G IP phone, tap Setting, and then tap the checkbox of Select All. Tap Delete. A confirmation message is displayed, confirming that you want to delete all the records.

  • Page 73: Call Features

    Call Features The Yealink IP phone is designed to be easily used like a phone deployed 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 74: Placing Calls

    You can also select a desired contact from the search list, or select a contact from the placed call list or Directory before you enter the number. On the SIP-T48S/T48G IP phone, you can select a desired contact from the left sidebar, or select a contact from the Directory or History.

  • Page 75: Placing Multiple Calls

    Call Features 3. Press the OK key or Send. Note Your system administrator can enable live keypad feature, which enables your phone to automatically dial out the phone number after a period of time without pressing the Send soft key. Check with your system administrator to find out if this feature is available on your phone.

  • Page 76: Speed Dialing A Contact Using A Speed Dial Key

    Yealink T4 Series IP Phones User Guide Procedure 1. Navigate to Menu->Features->DSS Keys. 2. Select a desired line key. 3. Select SpeedDial from the Type field. 4. Select a desired line from the Account ID field. 5. Do one of the following: (Optional.) Enter the string that will appear on the LCD screen in the Label field.

  • Page 77: Recalling A Contact

    Procedure 1. Navigate to Menu->Features->Others->Hot Line. On the SIP-T48S/T48G/T42S/T42G/T41S/T41P/T40G/T40P IP phone, navigate to Menu->Features->Hot Line. 2. Enter the desired number in the Hotline Number field. 3. Enter the desired delay time between 0 and 10 (seconds) in the Hotline Delay field.

  • Page 78: Placing A Call From The Call History

    2. Select a desired call list. 3. Select a desired call record, and press Send. On the SIP-T48S/T48G IP phone, tap the desired contact. Placing a Call from the Directory You can search or call contacts in your phone directories.

  • Page 79: Placing A Anonymous Call

    For the SIP-T42S/T42G/T41S/T41P/T40P/T40G IP phone, select a desired line from the Line ID field. 3. Select Enabled from the Local Anonymous field. For the SIP-T48S/T48G IP phone, tap the On radio box of the Local Anonymous field. 4. (Optional.) Select the desired value from the Send Anony Code (Send Anonymous Code) field.

  • Page 80: Answering Calls

    Yealink T4 Series IP Phones User Guide Enabling Anonymous Call Rejecting Anonymous Calls Automatically Answering Calls When your phone receives an incoming call on your phone, you can choose to answer it in various ways, including answering a call or multiple calls, or answering calls automatically.

  • Page 81: Enabling Call Waiting

    1. Navigate to Menu->Features->Call Waiting. 2. Select Enabled from the Call Waiting field. For the SIP-T48S/T48G IP phone, tap the On radio box of the Call Waiting field. 3. Select Enabled from the Play Tone field. For the SIP-T48S/T48G IP phone, tap the On radio box of the Play Tone field.

  • Page 82: Silencing Or Rejecting Incoming Calls

    For the SIP-T42S/T42G/T41S/T41P/T40P/T40G IP phone, select a desired line from the Line ID field. 3. Select Enabled from the Local Anony Reject (Local Anonymous Rejection) field. For the SIP-T48S/T48G IP phone, tap the On radio box of the Local Anony Reject field.

  • Page 83: Ending Calls

    For T48S/T48G/T42S/T42G/T41S/T41P/T40P/T40G, navigate to Menu->Features->Auto Redial. 2. Select Enabled from the Auto Redial field. For the SIP-T48S/T48G IP phone, tap the On radio box of the Auto Redial field. 3. Enter the desired time (between 1 and 300 seconds) in the Redial Interval field.

  • Page 84: Call Mute

    Yealink T4 Series IP Phones User Guide Procedure When the callee is busy, the phone screen prompts whether to auto redial the contact, press OK. 1. The phone screen displays the redial times and interval, press OK. 2. Wait for the designated period of time or press OK to redial the phone number immediately.

  • Page 85: Keep Mute

    Call Features The mute key LED goes out on all IP phones except the SIP-T40P/T40G IP phone. You can also mute the microphone while phone is dialing or ringing, so that the other party cannot hear you when the call is set up.

  • Page 86: Resuming A Held Call

    Yealink T4 Series IP Phones User Guide The phone ignores engaged audio device (handset or headset) and plays beep in the Speakerphone (hands-free) mode by default. The Speakerphone key will light up for 1 second along with the beep except on the SIP-T40P/T40G IP phone.

  • Page 87: Rejecting Calls With Dnd On All Lines

    Procedure 1. Navigate to Menu->Features->DND. 2. Select Enabled from the DND Status field. On the SIP-T48S/T48G IP phone, tap On radio box of the DND Status field. 3. Press Save. The DND icon appears in the status bar. To activate or deactivate DND quickly, press the soft key when the phone is idle.

  • Page 88: Deactivating Dnd

    Yealink T4 Series IP Phones User Guide 4. (Optional.) Enter the DND on code or off code respectively in the On Code or Off Code field. 5. Press Save. The DND icon appears on the desired line. If you activate DND on the default line, the DND icon will appear both on the line and in the status bar.

  • Page 89: Forwarding All Incoming Calls To A Contact

    1. Navigate to Menu->Features->Call Forward. 2. Select a desired forwarding type and select Enabled from the corresponding field. For the SIP-T48S/T48G IP phone, tap the On radio box of the corresponding field. 3. Do one of the following: Enter the contact number you want to forward incoming calls to in the Forward to field.

  • Page 90: Deactivating Call Forward

    2. Select a desired line. 3. Select a desired forwarding type and select Enabled from the corresponding field. For the SIP-T48S/T48G IP phone, tap the On radio box of the corresponding field. 4. Do one of the following: Enter the contact number you want to forward incoming calls to in the Forward to field.

  • Page 91: Forwarding Incoming Calls With A Forward Key

    Enter the contact number you want to forward the incoming calls to in the Value field. For theSIP-T46S/T46G IP phone, highlight the Label or Value field. Press Directory (Dir) and then select a desired contact from the Directory list(s). For the SIP-T48S/T48G IP phone, tap , and then tap the desired contact. 6. Press Save.

  • Page 92: Transferring Calls

    If you have set a Speed Dial key, you can also press the Speed Dial key to transfer the call to the contact directly. Press Directory (Dir). Select a desired contact from the Directory list(s). On the SIP-T48S/T48G IP phone, tap the Directory or History. Tap the desired contact. 4. Press B Transfer (B Trans) or the TRANSFER key to complete the transfer.

  • Page 93: Performing A Semi-Attended/Attended Transfer

    Enter the number or select a contact from the placed call list you want to transfer the call to. Press Directory (Dir). Select a desired contact from the Directory list(s). On the SIP-T48S/T48G IP phone, tap the Directory or History. Tap the desired contact. 3. Press the OK key or Send.

  • Page 94: Performing Transfer With A Transfer Key

    Yealink T4 Series IP Phones User Guide Performing Transfer with a Transfer Key By default, you can transfer a call to a specific contact directly using a Transfer key during a call. Your system admin- istrator can also set your phone to perform attended transfer when using a Transfer key.

  • Page 95: Conference Calls

    Setting a Transfer Key Conference Calls The Yealink IP phones support three-way local conference and multi-way network conference. Note Network conference is not available on all servers. Check with your system administrator to find out if it is available on your phone.

  • Page 96: Joining Two Calls In A Conference

    You can also select a desired contact from the search list, or select a contact from the placed call list or Directory before you enter the number. On the SIP-T48S/T48G IP phone, you can select a desired contact from the left side- bar, or select a contact from the Directory or History.

  • Page 97: Holding/Resuming A Conference Call

    Press Remove to remove the party from the conference call. Press Back to return to the previous screen. On the SIP-T48S/T48G IP phone, you can do the following: to mute the party. The muted party can hear everyone, but no one can hear the muted party. The icon changes to to hold the party.

  • Page 98: Ending A Conference Call

    Contact your system administrator for more information. Call Recording On the SIP-T48S/T48G/T46S/T46G/T42S/T41S IP phone, you can record active calls onto a USB flash drive connected to your IP phone, and the recordings are saved as *.wav files. Recording using a USB flash drive is not available by default. Check with your system administrator to find out if this feature is available on your phone.

  • Page 99: Recording A Call

    Call Features Topics Recording a Call Managing a Call While Recording Pausing a Recording Pausing a Recording Resuming a Recording Resuming a Recording Stopping a Recording Playing a Recorded Call Pausing/Resuming a Recording Fast Forwarding/Rewinding a Played Recorded Call Stopping a Playback Deleting a Recorded Call Viewing the Available Recording Time Recording a Call...

  • Page 100: Resuming A Recording

    Yealink T4 Series IP Phones User Guide Procedure 1. Press More, and then press PauseREC. The pause recording icon appears on the LCD screen and the duration stops counting. Resuming a Recording You can resume a paused recording during a call.

  • Page 101: Pausing/Resuming A Recording

    ) to skip forward the playback. Press once to skip forward 8 seconds. Press F.Rew ( ) to rewind the playback. Press once to rewind 8 seconds. On the SIP-T48S/T48G IP phone, drag the slider to skip forward the playback or rewind the playback.

  • Page 102: Stopping A Playback

    The IP phone supports the following 31 channels: 0: Broadcasts are sent to channel 0. Note that the Yealink IP phones running firmware version 80 or earlier can be regarded as listening to channel 0. It is the default channel.

  • Page 103: Sending Multicast Paging

    Managing a Paging Call Sending Multicast Paging Yealink IP phone supports up to 31 groups for paging. You can assign a label to each group to identify the phones in the group, such as All, Sales, or HR. You can set a line key as Multicast Paging key or Paging list key on the phone, which allows you to send announce- ments to the phones with pre-configured multicast address(es) on specific channel(s).

  • Page 104: Setting A Paging List Key

    The default tag is Empty if it is not configured before. 3. Press Option, and then select Edit. For the SIP-T48S/T48G IP phone, tap Edit. 4. Enter the multicast IP address and port number (for example, 224.5.6.20:10008) in the Address field.

  • Page 105: Sending A Paging By A Multicast Paging Key

    Both your phone and receiver’s phone play a warning tone and the multicast RTP session will be automatically answered on the receiver’s phone in the speakerphone (hands-free) mode. On the SIP-T48S/T48G IP phone, the multicast paging key icon indicator will become  and solid. On other IP phones, the multicast paging key LED glows green.

  • Page 106: Receiving Multicast Paging

    Yealink T4 Series IP Phones User Guide Receiving Multicast Paging You system administrator has set a listening paging group for you, and then you can receive a paging call when the phone is idle. The paging call is automatically answered on your phone.

  • Page 107: Advanced Features

    Advanced Features Advanced Features This chapter explains how to use the advanced features on the IP phone. Topics Call Completion Call Pickup Call Park and Call Retrieve Busy Lamp Field (BLF) BLF List Shared Line Intercom Messages Hot Desking Automatic Call Distribution (ACD) If you require additional information or assistance with your new phone, contact your system administrator.

  • Page 108: Call Pickup

    You can use call pickup to answer someone else’s incoming call on your phone. Check with your system administrator to find out if this feature is available on your phone. The Yealink IP phone supports Directed Call Pickup and Group Call Pickup. Directed Call Pickup: allows you to pick up incoming calls from another phone.

  • Page 109: Picking Up A Group Call

    Advanced Features The target phone receives an incoming call. Your system administrator has enabled the directed call pickup and set the directed call pickup code. Procedure 1. Pick up the handset, press the line key or the Speakerphone key. The DPickup soft key appears on the LCD screen (You may need to press the More soft key to see the DPickup soft key).

  • Page 110: Setting A Directed Pickup Key

    Yealink T4 Series IP Phones User Guide Setting a Directed Pickup Key You can set a line key as a Directed Pickup key, and specify a contact you want to pick up a call from for this key. Before You Begin Your system administrator has set the directed call pickup code.

  • Page 111: Picking Up A Group Call Using A Group Pickup Key

    Enter group call pickup code in the Value field. For theSIP-T46S/T46G IP phone, highlight the Label or Value field. Press Directory (Dir) and then select a desired contact from the Directory list(s). For the SIP-T48S/T48G IP phone, tap , and then tap the desired contact. 7. Press Save.

  • Page 112: Parking Or Retrieving A Call In The Fac Mode

    Yealink T4 Series IP Phones User Guide Parking or Retrieving a Call in the FAC Mode Parking or Retrieving a Call in the Transfer Mode Parking or Retrieving a Call with a Park/Retrieve Key Parking or Retrieving a Call in the FAC Mode Your system administrator sets up the FAC mode in which you can park and retrieve a call on your phone.

  • Page 113: Parking Or Retrieving A Call In The Transfer Mode

    Advanced Features When the phone is idle, you can use a Retrieve key or a BLF key to retrieve a parked call directly. Related Topics Parking or Retrieving a Call with a Park/Retrieve Key Parking/Retrieving a Call by BLF Key Retrieving a Call by BLF List Key Parking or Retrieving a Call in the Transfer Mode Your system administrator has set up the Transfer mode in which you can park and retrieve a call on your phone.

  • Page 114: Parking Or Retrieving A Call With A Park/Retrieve Key

    Yealink T4 Series IP Phones User Guide Parking or Retrieving a Call with a Park/Retrieve Key You can easily use a Park key to park a call to a specific extension (if the FAC mode is set) or shared parking lot (if the Transfer mode is set), and quickly retrieve this parked call using a retrieve key.

  • Page 115: Setting A Retrieve Key

    Enter the parked extension or the retrieve lot in the Value field. For theSIP-T46S/T46G IP phone, highlight the Label or Value field. Press Directory (Dir) and then select a desired contact from the Directory list(s). For the SIP-T48S/T48G IP phone, tap , and then tap the desired contact. 6. Press Save.

  • Page 116: Setting A Blf Key

    Yealink T4 Series IP Phones User Guide Audio Alert for Monitored Lines Visual Alert for Monitored Lines Picking up a Remote Call by BLF Key Transferring a Call by BLF Key Parking/Retrieving a Call by BLF Key Setting a BLF Key You can set a BLF key to monitor a specific line for status changes on the phone.

  • Page 117: Audio Alert For Monitored Lines

    Advanced Features Set a BLF key to monitor the state of specific remote line. An idle screen is similar to the one shown below: The following table shows the LED/icon indicator associated with the line you are monitoring. Icons LED Status Description T48S/T48G T46S/T46G Solid green...

  • Page 118: Visual Alert For Monitored Lines

    Yealink T4 Series IP Phones User Guide For the SIP-T42S/T42G/T41S/T41P/T40P/T40G IP phone, navigate to Menu->Settings->Basic Settings->Sound- >BLF Ring Type. 2. Select the desired ring tone. The ring tone is played automatically. You can press the Volume key to adjust the tone volume.

  • Page 119: Picking Up A Remote Call By Blf Key

    When the monitored line receives an incoming call, the BLF key LED indicator of the monitored line will flash red (except the SIP-T48S/T48G IP phone). On the SIP-T48S/T48G IP phone, the BLF key icon indicator of the monitored line will become and flashing.

  • Page 120: Performing A Blind Transfer

    Yealink T4 Series IP Phones User Guide Topics Performing a Blind Transfer Performing a Semi-attended/Attended Transfer Performing a Blind Transfer Before You Begin Check with your system administrator if the Transfer Mode via Dsskey is set to Blind Transfer. Procedure 1.

  • Page 121: Blf List

    1. Press Retrieve on the dialing screen. 2. Press the desired BLF key to retrieve a call that is parked to the monitored line. On the SIP-T48S/T48G IP phone, tap to back to the Idle screen, and then tap the desired BLF key to retrieve a call that is parked to the monitored line.

  • Page 122: Picking Up A Remote Call By Blf List Key

    Yealink T4 Series IP Phones User Guide Icon LED Status Description T48S/T48G T46S/T46G Solid red Monitored line is busy or in a call. Monitored line places a call on hold. Slow-flashing red A call is parked to the monitored line.

  • Page 123: Retrieving A Call By Blf List Key

    Shared Line Yealink IP phone supports Shared Call Appearance (SCA) or Bridged Line Appearance (BLA) to share a line, which can be registered on more than one IP phone at the same time.

  • Page 124: Placing Calls On A Shared Line

    Yealink T4 Series IP Phones User Guide The following table shows the LED icon indicator associated with the shared line: Line Key LED Icons Description except SIP-T48S/T48G T48S/T48G T46S/T46G The shared line is idle. Solid green The shared line is seized.

  • Page 125: Answering Calls On A Shared Line

    Advanced Features Answering Calls on a Shared line When an incoming call arrives on the shared line, all the registered phones will ring simultaneously, and the call can be answered on any of the phones. You can answer one call or multiple calls on the shared line. Incoming calls will be dis- tributed evenly among the available shared line keys.

  • Page 126: Holding A Call Privately

    Press the line key. On the SIP-T48S/T48G IP phone, tap In SCA scenario, long press the shared line key. On the SIP-T48S/T48G IP phone, long tap The Cancel, Call Pull (CallPull), New Call (NewCall) and Retrieve appear on the screen.

  • Page 127: Pulling A Shared Call On A Shared Line

    Advanced Features The Cancel, Call Pull (CallPull), New Call (NewCall) and Barge In (BargeIn) appear on the LCD screen. 2. Press Barge In (BargeIn) to interrupt the active call. Pulling a Shared Call on a Shared line In SCA scenario, both you and other users can pull an existing call from another shared phone that is in active or hold state.

  • Page 128: Placing An Intercom Call

    Yealink T4 Series IP Phones User Guide Picking Up an Incoming Call of the Target Extension Answering an Intercom Call Placing an Intercom Call To use the intercom feature, you should set a line key as an Intercom key in advance.

  • Page 129: Picking Up An Incoming Call Of The Target Extension

    When the target extension receives an incoming call, the intercom key icon of the target extension will change to on the SIP-T48S/T48G IP phone, the intercom key LED of the target extension will flash green on all other IP phones.

  • Page 130: Setting Intercom

    Yealink T4 Series IP Phones User Guide Setting Intercom You can configure the following behavior when receiving an intercom call. Intercom Allow Intercom Allow allows the IP phone to automatically answer an incoming intercom call. If you disable this feature, the IP phone will handle an incoming intercom call like a normal incoming call.

  • Page 131: Messages

    Your system administrator can disable the prompt box for new message(s). You can also read the messages if the prompt box disappears. Procedure 1. Navigate to Menu->Message->Text Message->Inbox. 2. Highlight a desired message, and then press View. On the SIP-T48S/T48G IP phone, tap the desired text message to read.

  • Page 132: Sending A Text Message

    Procedure 1. Navigate to Menu->Message->Text Message->Inbox. 2. Highlight the desired message, and then press Reply. On the SIP-T48S/T48G IP phone, tap the desired message, and then tap Reply. 3. Compose the new text message. 4. Press Send. Deleting a Text Message You can delete messages from your phone after reading.

  • Page 133: Setting The Voice Mail Code

    Advanced Features Receiving a Voice Message Leaving Voice Mails Listening to Voice Mails Setting the Voice Mail Code If you want to connect your phone to the message center, you need to set the voice mail code on your phone. Before You Begin Get the voice mail code from your system administrator.

  • Page 134: Hot Desking

    The LCD screen displays the amount of new and old voice mails. 2. Highlight an account, and then press Connect. On the SIP-T48S/T48G IP phone, tap the account. 3. Follow the voice prompt to listen to your voice mails. Related Topics...

  • Page 135: Automatic Call Distribution (Acd)

    Advanced Features The login wizard will be displayed. 3. Enter the login information. 4. Press Save to login. Automatic Call Distribution (ACD) ACD is often used in offices for customer service, such as call center. The ACD system handles large volumes of incom- ing calls from callers who have no need to talk to a specific person but who require assistance from any of multiple per- sons at the earliest opportunity.
  • Page 136 Yealink T4 Series IP Phones User Guide When you set the ACD user status to be unavailable, the ACD key icon indicator will become on the SIP-T48S/T48G IP phone, the ACD key LED flashes green, the server temporarily stops distributing calls to your IP phone.

  • Page 137: Optional Accessories With Your Phone

    Check with your system administrator to find out which of these applications or accessories are available on your phone. Caution We recommend that you use the accessories provided or approved by Yealink. The use of unapproved third-party accessor- ies may result in poor performance. Headset Yealink IP phone supports wired or wireless headset, USB headset and Bluetooth headset to place and answer calls.

  • Page 138: Analog Headset

    For more information on how to use your headset, see your headset documentation from the manufacturer. Bluetooth Headset You can use a Bluetooth headset to handle calls on the SIP-T48S/T48G/T46S/T46G/T42S/T41S IP phone. If both a Bluetooth headset and an analog headset are connected, only the Bluetooth headset can be used.

  • Page 139: Using Headsets

    LCD screen. Bluetooth The SIP-T48S/T48G/T46S/T46G/T42S/T41S IP phone supports Bluetooth. Bluetooth enables low-bandwidth wireless con- nections within a range of 10 meters (32 feet). The best performance is in the range of 1 to 2 meters (3 to 6 feet). Topics...

  • Page 140: Activating The Bluetooth Mode

    The Bluetooth device will not be connected anymore, but it will still be paired. When you activate the Bluetooth mode again, the paired Bluetooth device will appear in the Bluetooth Device(s) list on the SIP-T48S/T48G IP phone. On other IP phones, the paired Bluetooth device will appear in the Paired Bluetooth Device list.

  • Page 141: Pairing And Connecting The Bluetooth Headset

    On the SIP-T42S/T41S IP phone, navigate to Menu->Settings->Basic Settings->Bluetooth. 2. On the SIP-T46S/T46G/T42S/T41S IP phone, press Scan to search for the Bluetooth-Enabled mobile phone. 3. Find your Bluetooth-Enabled mobile phone, and then press Connect. On the SIP-T48S/T48G IP phone, tap your Bluetooth-Enabled mobile phone.

  • Page 142: Syncing The Mobile Contacts To The Ip Phone

    Yealink T4 Series IP Phones User Guide The IP phone will prompt the connect passkey on the LCD screen, as shown below: 4. Make sure your mobile phone is showing the same passkey, and then press OK on both mobile phone and IP phone.

  • Page 143: Viewing Your Mobile Contacts On The Ip Phones

    Make sure that the Bluetooth-Enabled mobile phone is paired and connected to your IP phone. Procedure 1. Navigate to Menu->Basic->Bluetooth->Paired Bluetooth Device. On the SIP-T48S/T48G IP phone, navigate to Menu->Basic->Bluetooth. On the SIP-T42S/T41S IP phone, navigate to Menu->Settings->Basic Settings->Bluetooth->Paired Bluetooth Device.

  • Page 144: Viewing The Bluetooth Device Information

    On the SIP-T42S/T41S IP phone, navigate to Menu->Settings->Basic Settings->Bluetooth->Paired Bluetooth Device. 2. Do one of the following: On the SIP-T48S/T48G IP phone, view the device name, device mac address, and the connection status from the Bluetooth Device(s) field. to view the synchronization status with the mobile contacts.

  • Page 145: Disconnecting The Bluetooth Device

    Bluetooth headset is connected again. Related Topics Deactivating the Bluetooth Mode Wireless Network You can connect the SIP-T48S/T48G/T46S/T46G/T42S/T41S IP phone to a wireless network. Topics Connecting the Wi-Fi USB Dongle WF40 Activating the Wi-Fi Mode Deactivating the Wi-Fi Mode...

  • Page 146: Deactivating The Wi-Fi Mode

    On the SIP-T42S/T41S IP phone, navigate to Menu->Settings->Basic Settings->Wi-Fi. 2. Select On from the Wi-Fi field. 3. Press Save on all IP phones except the SIP-T48S/T48G IP phone. The IP phone scans the available wireless networks in your area. Deactivating the Wi-Fi Mode You should deactivate the Wi-Fi mode when you need to connect your phone to the wired network.

  • Page 147: Connecting To An Available Wireless Network Manually

    3. (Optional.) To re-search the available network, press Scan. 4. Select the desired wireless network and then press Connect. On the SIP-T48S/T48G IP phone, tap the desired wireless network to connect to your IP phone. Or tap after the desired wireless network, and then tap Connect.

  • Page 148: Adding A Wireless Network Manually

    Procedure 1. Navigate to Menu->Basic->Wi-Fi->X Available Network(s) (X represents the number of available networks). On the SIP-T48S/T48G IP phone, navigate to Menu->Basic->Wi-Fi. On the SIP-T42S/T41S IP phone, navigate to Menu->Settings->Basic Settings->Wi-Fi->X Available Network(s). 2. Press Detail to view the detailed wireless network information (for example, Profile Name, SSID or Signal Strength).

  • Page 149: Managing The Saved Wireless Network

    Optional Accessories with Your Phone On the SIP-T48S/T48G IP phone, tap after the desired wireless network to view the detailed wireless network information (for example, Profile Name, SSID or Signal Strength). If the IP phone is connected to a wireless network successfully, you can also navigate to Menu->Basic->Wi-Fi- >Wi-Fi Status to view the connected wireless network information.

  • Page 150: Expansion Module And Your Phone

    The expansion module is a console you can use to connect to an IP phone to add additional line keys and expand the functions of your phone. Yealink SIP-T48S/T48G/T46S/T46G IP phone supports expansion module EXP40. It has two pages of 20 flexible ext keys and it can be programmed up to 40 various features. This section provides you how to con- nect the expansion module EXP40, how to assign the features for ext keys and how to adjust the contrast and backlight of expansion module EXP40.

  • Page 151: Adjusting The Backlight Of Expansion Module

    3. Press Save. Adjusting the Backlight of Expansion Module When you change the backlight intensity settings on your SIP-T48S/T48G/T46G/T46S IP phone, the backlight on expan- sion module connected to your phone automatically changes to match the new settings. Related Topics...
  • Page 152 Yealink T4 Series IP Phones User Guide...

  • Page 153: Maintaining Your Phone

    Maintaining Your Phone Maintaining Your Phone When your phone is unable to operate properly, you need to investigate or troubleshoot issues among other tasks your administrator may ask you to perform. Topics Diagnosing the Network Rebooting Your Phone Resetting to Factory Settings Updating the Phone Configuration Diagnosing the Network The wrong network settings may result in inaccessibility of your phone and poor network performance.

  • Page 154: Rebooting Your Phone

    Yealink T4 Series IP Phones User Guide 4. Press Back to go back to the preview screen. Rebooting Your Phone The improper operation may cause malfunction. If malfunction occurs, your system administrator may ask you to reboot your phone. Procedure 1.

  • Page 155: Updating The Phone Configuration

    Maintaining Your Phone The phone will be reset successfully after startup. Note Reset of your phone may take a few minutes. Do not power off until the phone has started up successfully. Updating the Phone Configuration Your system administrator may ask you to update your phone configurations. Procedure 1.
  • Page 156 Yealink T4 Series IP Phones User Guide...

  • Page 157: Appendix - Menu Structure

    Appendix - Menu Structure Appendix - Menu Structure For the SIP-T48S/T48G IP Phone...
  • Page 158 Yealink T4 Series IP Phones User Guide For the SIP-T46S/T46G IP Phone...
  • Page 159 Appendix - Menu Structure For the SIP-T42S/T42G/T41S/T41P/T40P/T40G IP Phone...

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