View source for Push-to-talk (PTT) (Zenitel Connect Pro)

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In a standard two‑way call in Zenitel Connect Pro, Zenitel intercom devices communicate in '''open duplex''' mode, enabling natural, hands‑free conversation with automatic echo cancellation.

For situations where controlled, one‑way speech is preferred, Zenitel native devices support '''Push‑to‑Talk (PTT)''', allowing users to momentarily override open duplex mode.

===Push-to-Talk Operation===
* '''Press M key''' (or * on ITSV)
**Device enters '''Talk Mode'''
** Loudspeaker is muted
** The device sends '''DTMF ‘*’''' to the remote side
* '''Release M key''' (or # on ITSV)
** Device returns to '''Open Duplex'''
** The device sends '''DTMF ‘#’''' to the remote side

The Zenitel Connect Pro will relay these DTMF * and # events to the remote device.

===Remote Control of Speech Mode (Received DTMF)===
Zenitel native devices respond to DTMF signals received from the remote device:
* '''On receiving DTMF ‘*’'''
** Device enters '''Listen Mode'''
** Microphone is muted
* '''On receiving DTMF ‘#’'''
** Device returns to '''Open Duplex'''

===Configuration Requirements===
No additional configuration is required for Push‑to‑Talk functionality.
However, this feature only applies when at least one device in the call is a Zenitel native device.
If '''neither''' device in the call is Zenitel native, Push‑to‑Talk does not apply.


=== Related articles ===
* [[Speech Direction Control (Zenitel Connect Pro)|Speech Direction Control]]



[[Category: Zenitel Connect Pro]]
[[Category: Zenitel Connect Pro Features and Functions]]