VTech DS6421-26 Manual - Manual (Page 61)

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Push-to-talk (PTT)
You can directly broadcast messages from one handset to the
speakerphone of one or a group of handsets. Press and hold
PUSH TO TALK to begin two-way communication. If only one
handset is available or registered, the handset screen shows
PTT requires two handsets when you press PUSH TO TALK.
Only one handset can talk at a time. To do so,
press and hold PUSH TO TALK while you are speaking.
You must release PUSH TO TALK, so the other person
can respond.
Only one PTT session can be active at a time.
While PTT is in use between handsets, other handsets
cannot use the intercom feature.
If you attempt to place a PTT call to another handset that
is on an outside call or intercom call, or accessing the
answering system, your handset displays Not available at
this time.
PTT on/off
You can turn PTT on or off on each handset.
To turn PTT on or off:
Press PUSH TO TALK when the handset is not in use.
The PUSH TO TALK menu displays.
Press or to highlight PTT On/Off, then
press SELECT .
Press or to choose On or Off, then press
SELECT to save. You hear a confirmation tone.
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1.
2.
3.
INCOMING PTT
On
Off
BACK SELECT
PUSH TO TALK
HANDSET A 2
HANDSET B 3
All handsets
PTT On/Off
BACK SELECT
When PTT is turned off, the handset shows
No Incoming PTT while the phone is not in use.
Multiple handset use