In this article, you will learn how to use your Yealink T23g Phone.

Note: the same features and device buttons apply to most Yealink Txx models.

I. Connecting your Yealink Phone


Connect Handset

Step 1.  Turn the phone body over to expose the ports on the back of the unit

Step 2.  Insert the long end of the phone cord into the handset port on the phone body

Step 3.  Insert the other end of the phone cord into the port at the bottom of the handset.


Connect Power

Step 1.  Insert one end of the power cord into an outlet and insert the other end of the

power cord into the power port on the phone body

NOTE:  To power the phone through the Ethernet connection, use the optional Yealink YLPOE30 Power Over Ethernet splitter accessory (sold separately)


Connect to Network

Step 1.  Insert one end of the Ethernet cable into the network port on the phone body marked “Internet”

Step 2.  Insert the other end of the Ethernet cable into the appropriate device, such as a

network switch, on your network.

(Optional) Connect a PC to your IP Device

Step 1.  To provide network access to a PC, connect one end of an additional Ethernet cable (not provided) to the PC port on the back of the phone body


II. Getting to know your Yealink T23g

1: Phone Screen

Shows information about calls, messages, soft keys, time, date and other relevant data.

2: Power Indicator LED

Indicates call status, message status and phone’s system status.

• Receives an incoming call—Fast-flashing

• Receives a voice mail or text message—Slow-flashing

3. Line Keys

Access your phone lines and features

4. Soft Keys

Access the function displayed on the screen above the soft keys. The soft keys change depending on what you are doing at the time.

5. Navigation Keys

- Scroll through information or options displayed on the screen.

5. OK Key

- Confirms actions or answers incoming calls.

5. Cancel Key

- Cancels actions or rejects incoming calls

6. Headset Key

Toggles headset mode on or off. The LED indicator glows green when the headset is activated.

7. Hold Key

Places caller on hold or resumes a held call.

8. TRAN Key

Transfers a call.

9. Speakerphone KeyToggles the speakerphone (hands-free) mode or not.

10. RD Key

Redials a previously dialed number.

11. MESSAGE Key

Access your voice messages.
The LED indicator glows green when receiving a new voice mail.

12. CONF Key

Creates a conference with another party.
(Not available on T23G/T23P/T21(P)

13. MUTE Key

Toggles the microphone on or off..

14. Volume Key

Adjust the volume of handset, headset, speaker.

15. Keypad keys

Allow you to enter numbers, letters, and special characters. If a menu item has an index number, you can use the keypad key to select the item.

16. Speaker

Provides ringer and speakerphone audio output.

17. Reversible Tab

Secures the handset in the handset cradle when the phone is mounted vertically. For more information on how to adjust the reversible tab, refer to Yealink Wall Mount Quick Installation Guide for Yealink IP Phones

18. Hookswitch

Connects or disconnects the phone from the phone line. The hookswitch is automatically activated when a user lifts the handset from the cradle to get a dial tone.


III. Basic Phone Functions

1. Answering a Call

Option 1. Pickup the Handset

Option 2. Press the Speaker Button

Option 3. Press the Headset Button (if separate headset is attached)

Option 4. Press a red flashing line button to answer a call.


2. Placing a Call

Step 1.  Pickup the Handset or press the Speaker button to hear a DialTone

Step 2.  Using the Dialpad, enter the 10-digit number of the person you wish to call.


3. How do I put a caller on Hold?

Step 1. Press the HOLD Key or Hold during a call.

Step 2. To resume a held call press the HOLD button again.


4. How do I transfer a call?

Your Yealink T-Series  Device supports two different methods of Transferring calls. Both options are described below:

Option 1: Attended Transfer: You call the person to whom you are transferring the call and either:

   - transfer the call while the phone is ringing.

   - wait for the person to answer before transferring the call.

Option 2: Blind Transfer: You transfer the call without speaking to the other party to which you are transferring the call.


To perform an Attended Transfer:

Step 1:  During an active call, press the [Trans] soft key or the [Tran] button. The call is placed on hold and a new line is opened to dial the number.

Step 2:  Dial the number you want to transfer the call.

Step 3:  When your call is connected with the other party, press the [Tran] button to complete the transfer.



To perform a Blind Transfer:

Step 1:  During an active call, press the [Trans] soft key or the [Tran] button

Step 2: Enter the number to which you want to transfer the call

Step 3:  When you hear Ringback, Press the [B. Tran] soft key or [Tran] button again to complete the transfer.


5. How do I use "Do Not Disturb" mode to prevent incoming calls from ringing Device?

To activate Do Not Disturb (DND):

Step 1: To activate Do Not Disturb, press the [DND] soft key. The LCD screen indicates that Do Not Disturb is turned on for your phone. by displaying a red icon in the top bar of the LCD screen as shown below:

To deactivate Do Not Disturb (DND):


Step 1: To deactivate Do Not Disturb, press the [DND] softkey.


6. How to place a Three-Way Conference Call

Step 1:  Press the [Conf] softkey during an active call. The first call is placed on hold, a second line is opened, and you hear a dial tone.

Step 2: Dial the second person’s telephone number.

Step 3:  Press the [Conf] softkey again. All three parties are connected in the conference call.

Note: When you hang up, the other two parties are disconnected.



IV. Restart your Phone

Step 1:  Press the Menu soft key

Step 2:  Choose 3. Settings

Step 3:  Choose 1. Basic Settings

Step 4.:  Choose 7. Reboot

Step 5: Press OK  to confirm the reboot.

Note: The phone will reboot. During this time you will not be able to place or receive calls. Additionally, if you have a PC connected to the PC port of your phone, it will temporarily lose connectivity to your network.



Refer to the manufacturers Yealink T23G Getting Started Guide for additional instructions and visual illustrations for the following:

  • Assembling the Phone
  • Connecting to Wired Network
  • Connect external corded  Headset
  • Populate device's Contacts / Directory