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Multiple handset
Push-to-talk (PTT)
Answer a PTT call
You can respond to a PTT call whenever the speakerphone light is off, as 
described below.
When your handset receives a PTT call, the handset beeps and displays 
Press and hold [PTT] to talk.
When someone else is speaking, your speakerphone light is on, and 
you handset displays PTT From HANDSET X To handset: Y (the first X 
represents the initiating handset number and Y represents your handset 
number; a maximum of 4 handset numbers appear).
When your speakerphone light is off (the handset displays Press and hold 
[PTT] to talk), you hear a beep. Press and hold PUSH TO TALK on your 
handset. When you hear a chirp, speak towards the handset.
While you are speaking, your handset displays PTT To handset X 
(X represents the handset numbers of one or more destination 
handsets; a maximum of 4 handset numbers appear).
Your voice is broadcast to all destination handsets.
Release PUSH TO TALK when you finish speaking. Your handset will beep. After 
the beep, if your speakerphone light is off, you can press and hold  
PUSH TO TALK to continue speaking or the destination handsets can respond.
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