User`s guide

284
Field Definitions
Max CAI Data Tx Attempts This field will be visible for Mobiles only. Use the UP/DOWN arrow keys
to select the Maximum Transmit Attempts per Common Air Interface
(CAI) Data Packet or enter a value directly. If the radio fails to receive
a positive acknowledgment to a confirmed packet transmission, it will
attempt to re-send the confirmed CAI data packet. This field
determines the maximum number of times (including the initial
attempt) that the radio will retry a confirmed CAI data packet without
receiving a positive CAI response before aborting. The valid range is 2
to 10.
Max CAI Packet Size This field will be visible for Mobiles only. Use the UP/DOWN arrow keys
to select the maximum Common Air Interface (CAI) Data Packet size.
The value in this field determines the maximum number of bytes that
can be transported in a single CAI data packet. The valid range of
values is 16 to 512 in increments of 16.
Talk Inhibit Tone This field will be visible for radios equipped with Data Peripheral only. Use
the UP/DOWN arrow keys to enable/disable the Talk Inhibit Tone
feature. The Talk Inhibit Tone is used to alert the user of a collision
between voice and data transmissions.
When this field is enabled, the radio will sound the inhibit tone any
time the user presses the PTT while the radio is already engaged in
transmitting a data packet. This tone will last for the duration of the
data packet.
CAI Data Response Timer (ms) This field will be visible for Mobiles only. Use the UP/DOWN arrow keys
to select the Common Air Interface (CAI) Response Timer value or
enter a value directly. This timer determines how long the radio will
wait for a CAI response before re-trying a confirmed CAI data packet
transmission. Timer values may range from 100 to 5000 ms in 100-ms
increments.
CAI Data Min Response Timer
(ms)
This field will be visible for Mobiles only. Use the UP/DOWN arrow keys
to scroll through the available Common Air Interface (CAI) Data
Minimum Response Timer values. The value may also be entered
directly. This timer defines the minimum idle time required over the
air to allow a confirmed CAI response to be sent across the RF channel.
This parameter should be slightly greater than the data throughput
delay from the RNC (the data controller) to the radio. Timer values
may range from 50 to 2000 ms in 50-ms increments.
Note: This parameter should NOT be changed without first verifying
the particular throughput of your system.
Data Frame Sync Seek Period
(ms)
Use the UP/DOWN arrow keys to select the Data Frame Sync Seek
Period (FSSP) value. This is the time period for which the radio will
“listen” for a Frame Sync Sequence. The presence of the Frame Sync
Sequence indicates that there is activity on the channel. If no Frame
Sync Sequence is detected within this time period, the radio will
assume that the channel is idle and transmit the next packet queued
for transmission.