Multiple handset use
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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 the screen 
shows Press and hold [PTT] to talk. 
When the other party is speaking, your speakerphone light is on, and 
your handset shows PTT From HS X To HS X (the first X represents the 
initiating handset number, the second X represents your handset number; 
a maximum of four handset numbers appear).
When your speakerphone light is off (the screen shows Press and hold 
[PTT] to talk), press and hold PUSH TO TAL� on your handset. You will 
hear a chirp. Speak towards the handset.
While you are speaking, your handset screen shows PTT To handset: X 
(X represents the handset numbers of one or more destination handsets; 
a maximum of four handset numbers appear).
Your voice broadcasts to all destination handsets.
After speaking, release PUSH TO TAL�. Your handset will beep.  
After the beep, if your speakerphone light is off, you can press and hold  
PUSH TO TAL� to continue speaking, or the destination handset  
can respond.
Change a one-to-one PTT call to an intercom call
You can convert a one-to-one PTT session to an intercom call. 
When your handset screen shows Press and hold [PTT] to talk, press 
MENU/SELECT. The screen shows 
>
Intercom. 
Press MENU/SELECT. Your handset displays Calling other handset or 
Calling HANDSET X. The destination handset screen briefly shows Push 
to talk Ended and then Other handset is calling or HANDSET X is 
calling. The destination handset rings.
On the destination handset, press  PHONE/FLASH or any of the dialing 
keys (0-9, #, or TONE ) to answer the intercom call. Both handsets now  
show Intercom.
To end the intercom call, press  OFF/CANCEL or place the handset in the 
telephone base or charger. Both screens show Intercom ended. 
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Push-to-talk (PTT)