Multiple handset use
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Push-to-talk (PTT)
Answer a PTT call
You can respond to a PTT call, as described below.
1.  When your device receives a PTT call, it beeps and shows Press 
and hold [PTT] to talk. 
2.  When the other party is speaking, your speakerphone light is 
on, and your device shows PTT From HS X To HS X
X represents the initiating handset number, and the second X 
represents your handset number; a maximum of four handset 
numbers appear).
3.  Press 
and hold [PTT] to talk), press and hold PTT on your handset. 
You will hear a chirp. Speak towards the device.
f While you are speaking, your device shows PTT To handset: X  
(X represents the handset numbers of one or more 
destination handsets; a maximum of four handset numbers 
appear).
f Your voice is broadcast to all destination devices.
PTT
press and hold 
PTT to continue speaking.
Change a one-to-one PTT call to an intercom call
You can convert a one-to-one PTT session to an intercom call. 
1.  When your device shows Press and hold [PTT] to talk, press  
MENU/SELECT. The screen shows Intercom.
2.  Press MENU/SELECT. Your device displays Calling other handset 
or Calling HANDSET X
Push to talk Ended and then Other handset is calling or 
HANDSET X is calling. The destination device rings.
3.  Press   or any dialing keys (0-9, 
#
 or TONE ) on 
the destination device to answer the intercom call. Both devices 
now show Intercom.
4. To end the intercom call, press   on your handset 
or place the handset in the telephone base or charger. Both 
screens show Intercom ended.