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Push to Talk
The
For PTT to function, the
Two types of PTT calls can be made:
•PTT Voice Style (initiated by the handset)
•PTT Message Style (initiated by the system)
PTT Voice Style Calls (Handset initiated)
Each member of a PTT group is able to initiate a PTT call via a PTT request. This PTT Call request is typically programmed onto a soft key, hot key or
After a PTT Call request is made, the system invites the other members of the PTT group into the PTT call. The invitation typically barges onto the invited members' handsets following brief alerting of the incoming PTT call; manual PTT Call acceptance can be configured optionally.
After the PPT group members have received/accepted their PTT invitations, the system automatically dials them onto the configured conference bridge and they become active in the PTT call.
Note: Depending on the configuration, it may take 10 seconds or more for all members to be active on the PTT call from the time a user initiates a PTT request.
Note: Multiple PTT groups are supported; if a handset is a member in multiple groups, the PTT Groups can be programmed onto the handset menu to enable selection of the appropriate PTT group Call request.
Tip: Set the automatic key lock to “On”. If it is desired to have key lock during an ongoing call, see Activate the Automatic Key Lock on page 69.
Accept a PTT Invitation - Voice Style
The PTT invitation is indicated by a 
icon and is received as an incoming call. In the dialog window, a message containing maximum 24 characters can also be shown.
1.Press 
The handset may accept the invitation automatically and start in inverted mute and loud- speaking mode, depending on the configuration of the received PTT invitation.
2.Press and hold the Mute button to open the microphone for transmitting.
The microphone is muted again when the Mute button is released.
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