ADTRAN 3192 H4TU-C, Установка и эксплуатация

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61223404L2-5A Issue 1, December 2003 A-3
Table A-2. Loopback Control Codes
Function Code (Hex / Binary) Response
ARM (in-band) - also
known as 2-in-5 pattern 11000 (binary) If the pattern is sent from the network, the units will arm, and
the H4TU-R will loop up if NIU Loopback is enabled.
ARM (ESF Data Link) FF48 or
1111 1111 0100 1000
sent in the Facility Data Link If the pattern is sent from the network, the units will arm, and
the H4TU-R will loop up if NIU Loopback is enabled. When
sent from the customer, the units will arm.
Disarm (in-band) - also
known as 3-in-5 pattern 11100 (binary) When sent from the network or customer, all units are
removed from the armed state, and loopbacks will be released.
Disarm (ESF Data Link) FF24 or
1111 1111 0010 0100
sent in the Facility Data Link When sent from the network or customer, all units are
removed from the armed state, and loopbacks will be released.
H4TU-C Loop Up
1,2 D3D3 or
1101 0011 1101 0011 If armed, the H4TU-C will loop up, 2 seconds of AIS (all
ones) will be transmitted, the looped data will be sent for 5
seconds, and then a burst of 231 logic errors will be injected.
The burst of 231 logic errors will continue every 20 seconds as
long as the D3D3 pattern is detected. When the pattern is
removed, the unit will remain in loopback. If the pattern is
reinstated, the injection of 231 logic errors will continue every
20 seconds.
Loop Down w/o Disarm 9393 or
1001 0011 1001 0011 When sent from the network, all units currently in loopback
will loop down. Armed units will not disarm. In order to
behave like a smartjack, the H4TU-R will not loop down from
a network loopback in response to the 9393 pattern if NIU
Loopback is enabled.
Loopback Query
1 D5D5 or
1101 0101 1101 0101) When the pattern is sent from the network, logic errors will be
injected toward the network to indicate a loopback is present
toward the network. The number of errors injected is
determined by the nearest unit that is in loopback. As long as
the pattern continues to be sent, errors are injected again every
20 seconds:
H4TU-C 231 errors
H4R1 10 errors
H4R2 200 errors
H4TU-R 20 errors
Loopback Time Out
Override
1
D5D6 or
1101 0101 1101 0110 If the units are armed or a unit is currently in loopback when
this pattern is sent from the network, the loopback time out
will be disabled. As long as the units remain armed, the time
out will remain disabled. When the units are disarmed, the
loopback time out will revert to the previous loopback time
out setting.
If any element is in network loopback a bit error confirmation
will be sent.
H4TU-C 231 errors
H4R1 10 errors
H4R2 200 errors
H4TU-R 20 errors