Yealink T42U IP Telephone

Answering a Call

Lift the handset to answer a call, or press the Answer soft key, Speaker, or Headset button.

 

Placing a Call

Lift the handset, press the Speaker key, or press the Headset key.
Enter the number, then press Send.

 

Ending a Call

Hang up the handset, press the End Call soft key, or press Speaker/Headset to disconnect.

 

Mute a Call

Press the Mute key to mute your microphone.
Press Mute again to unmute.

 

Redialing

Press Redial to open the placed call list.
Use the arrow keys to scroll through entries.
Press Send to dial the highlighted number.
Press Redial twice to redial the most recent number.

 

Holding and Resuming

Press the Hold soft key to place a call on hold.
Press Resume or the flashing line key to return to the call.
If multiple calls are on hold, use the arrow keys to select the correct call before pressing Resume.

 

Call Transferring

Attended (Warm) Transfer

  1. Press Transfer during the call
  2. Enter the destination number and press Send
  3. Announce the call when answered
  4. Press Transfer again to complete
  5. Press Cancel to return if unanswered

Blind Transfer

  1. Press Transfer
  2. Enter the number
  3. Press Blind Transfer or Transfer again

Transfer to Voicemail
Transfer to * + extension (example: *90100)

 

Call History

Press the History soft key.
Use the left/right arrows to select Missed, Placed, Received, or All calls.
Highlight an entry and press Send to dial.

 

Volume Control

Use the Volume Up/Down keys:

  • When idle: adjusts the ringer volume
  • During a call: adjusts handset, speaker, or headset volume

 

Voicemail

Press the Voicemail key to listen to new messages.
Follow the prompts to play, delete, save, or forward messages.

 

Recording an Unavailable Greeting

  1. Press the Voicemail key
  2. Enter your mailbox number and password
  3. Press 0 for mailbox settings
  4. Press 1 to record your unavailable greeting
  5. Follow voice prompts and press # to save
  6. Choose to Accept, Listen, or Re‑record

 

Conference Calling

  1. During a call, press Conference
  2. Enter the second number and press Send
  3. When they answer, press Conference again to merge calls

 

Parking a Call

Press More → Park (or a programmed Park key).
Listen for the park slot number.
To retrieve, dial the park location.

 

Do Not Disturb (DND)

Press DND to enable or disable Do Not Disturb.
Incoming calls will not ring when DND is active.

 

Call Forwarding

  1. Press Menu → Features → Call Forward
  2. Choose:
    • Always Forward
    • Busy Forward
    • No Answer Forward
  3. Enter the number to forward to
  4. Press Save