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PK-88 OPERATING MANUAL
FRACK 'n'
Parameters:
'n'
1 to 15, specifying frame acknowledgment time-out in onesecond intervals.
FRACK is the FRame ACKnowledgment time in seconds that your PK-88 will wait for
acknowledgment of the last-sent protocol frame before resending or 'retrying' that
frame.
After sending a packet requiring acknowledgment, the PK-88 waits for FRACK seconds
timeout before incrementing the retry counter and sending the frame again. If the
packet address includes digipeat instructions, the time between retries is adjusted
to:
Retry interval = 'n' x (2 x m + 1)
where m is the number of intermediate relay stations
When a packet is retried, a random wait time is added to any other wait times in use.
This avoids lockups in which two packet stations repeatedly send packets which collide
with each other.
FULLDUP ON|OFF
Parameters:
ON
-
Full duplex mode is ENABLED.
OFF -
Full duplex mode is DISABLED.
When full-duplex mode is disabled (default), the PK-88 uses the DCD (Data Carrier
Detect) signal from its modem to avoid collisions; the PK-88 acknowledges multiple
packets in a single transmission with a single acknowledgment.
When full-duplex mode is enabled, the PK-88 ignores the DCD signal and acknowledges
packets individually.
Full-duplex operation is useful for full-duplex radio operation, such as through OSCAR
10 or dedicated traffic trunks. It should not be used unless both your station and the
distant station can operate in full-duplex.
You may also find full-duplex mode useful for some testing operations, such as analog
or digital loopback tests.
Mnemonic: FR
Mnemonic: FU
5-46
Default: 3
Default: OFF
COMMAND SUMMARY
PK88-128
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