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Push to Talk

The Push-to-Talk (PTT) function enables a pre-defined group of mobile staff to participate in a

call whereby they all listen to the group's call activity, typically in loudspeaker (Handsfree) mode.

Participants press and hold a button in order to speak.

For PTT to function, the PTT-capable handsets in the PTT group must be configured on the

Wireless Messaging Services (WSM) Gateway. In addition, a conference bridge, such as Mitel's

Collaboration Advanced (MCA), must be configured to support the PTT calls.

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 multi-function button on the handset

for quick access.

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.

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.

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.

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Mitel 5624 Bedienungsanleitung Seite 63