Tait P25 CG, Инструкция по установке и эксплуатации

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64 Operation TB9100/P25 CG Installation and Operation Manual
© Tait Electronics Limited January 2007
3. Press the speaker button a second time to play the receiver input. The
green speaker LED is lit.
4. Press the speaker button a third time to turn the speaker off.
Note
Under particular receiver settings, the speaker only monitors the
receiver audio, and not the switch output. If you need to talk to
people at other base stations, use an SU, or configure the base sta-
tion for another mode of operation (such as P25).
Gating and squelch mechanisms are carried out as normal on the switch output.
When the receiver input is monitored, the speaker audio is ungated but the
base station still carries out gating and squelch mechanisms on the receiver
input to the switch.
To maintain security, the speaker never decrypts encrypted calls. If a call is
encrypted, the speaker produces squalks and squeaks. However, if the P25
Console Gateway has an encryption license, the speaker remains silent.
Microphone Operation
The control panel microphone allows the maintainer to talk to the
dispatcher and to SU users on the network. This can be done in digital P25
or analog FM mode. This section describes how to set the speech mode for
the call. For detailed information about making a control panel call, refer to
“Making Test Transmissions” on page 42 .
To set the mode for the control panel microphone:
1. Use the CH button to select the channel you want to use.
2. Press the microphone button once to set the mode to analog FM.
The green microphone LED is lit.
3. Press the microphone button a second time to set the mode to
digital P25. The green microphone LED flashes.
When the mode is digital P25, microphone calls use the NAC (network
access code) in the current signaling profile. The call destination is to all
units in the channel group.
When the mode is analog FM, calls use the sub-audible signaling in the
current signaling profile.
Control panel calls can be made when the base station is in either Standby
or Run mode.
Note
Transmissions from the microphone override any other calls.
Before using the microphone, make sure that the channel is clear.
Otherwise, any calls in progress on that channel, including emer-
gency calls, will be terminated.