Original multifunctional SIP terminal modernized with PTT function (Push To Talk), which has a key purpose for use in conferences with several subscribers, for instance as an operator terminal of expedited-technological connection.

In order not to transmit extraneous noise into the conference, each terminal is set to MUTE mode (microphone off) by default. If the subscriber wants to talk, then he must press and hold the special PTT button (marked in red in the photo) during the entire conversation period. The moment the PTT button is released, the voice to the conference stops.
The terminal is equipped with ports for connecting an additional hands-free kit: an external microphone and a foot switch for the PTT function.
One EXP20 expansion module is already included in the package, additional modules can be ordered optionally (up to 6 pieces).