Making and receiving calls
202 Manpack Transceiver 2110 series Reference Manual
Making a call
Listen Before Transmit Mode
The 2110 series Manpack Transceiver is capable of listening to a channel before
initiating a call on the channel. If the Cfg LBT Mode in the Control List is enabled, the
transceiver detects whether or not there is traffic on the selected channel. The transceiver
listens on a channel for the length of time specified in the Cfg LBT Period entry in the
Control List. If there is traffic on the channel, the transceiver reports that the channel is
occupied.
The Cfg LBT Mode may be set to Enabled, Override allowed, or Disabled.
When the Cfg LBT Mode is set to Enabled and the transceiver detects that the channel
tried is occupied, it prompts you to try the call again. You can:
• press CALL to try the call again using LBT
• press to select a new channel, then press CALL to make a call on this channel
using LBT
When the Cfg LBT Mode is set to Override allowed and the transceiver detects that
the channel tried is occupied, it prompts you to try the call again. You can:
• press CALL to try the call again using LBT
• hold CALL to try the call again without LBT (send the call regardless of any
detected traffic)
• press to select a new channel, then press CALL to make a call on this channel
using LBT
• hold to select a new channel and try the call on this channel without LBT (send
the call regardless of any detected traffic)
Calls using the Emergency call type or calls made through the key override the LBT
Mode if it is enabled at either level.
When the Cfg LBT Mode is set to Disabled the transceiver does not test the channel.
NOTE
If you change the setting in the Cfg LBT Mode entry in the Control List,
you must switch the transceiver off then on again for the change to take
effect.
NOTE
If only one channel was tried and found to be occupied using LBT, you
can listen for traffic on the channel then, if clear, override LBT by holding
CALL.
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