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Emergency Operation
scanned group. If the ATG is the currently selected group, the
terminal will receive the Emergency Group Call to the group
associated with this ATG. (For information on the ATG, see
page 41.)
When the MTP850 receives the call, the display will show
Emgcy In Use and the caller’s identity.
If upon entering Emergency Mode, your MTP850 receives an
Emergency call, and Hot Microphone was enabled by your
Service Provider, the Wait For Mic message will be
displayed. Your MTP850 will attempt to get a talk permit.
The caller’s voice will always sound via the speaker (unless
an external earpiece is connected to the terminal.
If configured by your Service Provider, the screen
background will be red.
Making an Emergency Private Call
1. Press and hold the Emergency button.
2. The terminal will start the call as a half-duplex or full-duplex
call (as programmed). The Emergency ID is pre-defined
and is not displayed.
3. Continue the call as you would do in a half-duplex or full-
duplex call.
Receiving an Emergency Private Call
1. The talker’s identity is displayed when the terminal receives
the half-duplex call.
2. When the terminal receives the call, the display will show
Emergency Prvt In Use and the caller’s identity.
If configured by your Service Provider, the screen
background will be red.
3. Continue the call as you would do in a half-duplex or full-
duplex call.
Modifying the Type of Call
The infrastructure can modify on-going calls as follows:
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