User`s guide

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If the Common Air Interface (CAI) data packet to be transmitted is an
acknowledgment, this timer represents the MAXIMUM time that the
radio will wait after it detects a BUSY Channel Status Symbol to re-
check the Channel Status Symbols for permission to transmit. This
value may range from 50 to 1000 ms in 50-ms increments.
Increasing this value reduces the potential of collision with other
radios attempting to transmit data (seize the channel), but it also
increases channel access delay.
Note: For more details on data channel access operation, refer to
the APCO 25 Common Air Interface Operational Description for
Conventional Channels.
Data Group ID This field will be visible for Mobiles only. Use the UP/DOWN arrow keys
to select the Common Air Interface (CAI) Data Group ID value. This
value may also be entered directly.
The CAI Data Group ID associates the radio with a specific group for
group addressing of data messages. This ID is used only for address
decoding on data receive. When data is being transmitted by the radio,
the Data Group ID is NOT used. A radio can be a member of up to 8
groups. Values for this ID may range from 10,000,000 to 16,777,214.