ADTRAN 1181413L2, Installation And Maintenance Manual

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HDSL4 Maintenance Modes HDSL4 for General Distribution Installation and Maintenance Practice
A-2 61223HDSL4L2-5C
Table A-1. HDSL4 Loopback Control Codes
Type
Source
1
Code
2,3 Name
Abbreviated (N)
(N)
(N)
(N)
(C)
(C)
(C)
(C)
3in7 (1110000)
4in7 (1111000)
2in6 (110000)
3in6 (111000)
6in7 (1111110)
5in7 (1111100)
4in6 (111100)
5in6 (111110)
Loopback data from network toward network in
the HTU-R
Loopback data from network toward network in
the HTU-C
Loopback data from network toward network in
first HRE
Loopback data from network toward network in
second HRE
Loopback data from customer toward customer in
HTU-C
Loopback data from customer toward customer in
HTU-R
Loopback data from customer toward customer in
H4R1
Loopback data from customer toward customer in
H4R2
Wescom (N)
(C)
(N)
(N)
(N)
(C)
(C)
(C)
(N)
(C)
FF1E
(1111 1111 0001 1110)
3F1E
(0011 1111 0001 1110)
FF04
(1111 1111 0000 0100)
FF06
(1111 1111 0000 0110)
FF08
(1111 1111 0000 1000)
3F04
(0011 1111 0000 0100)
3F06
(0011 1111 0000 0110)
3F08
(0011 1111 0000 1000)
FF02
(1111 1111 0000 0010)
3F02
(0011 1111 0000 0010) Loopback data from network toward network at
HTU-C
Loopback data from customer toward customer at
HTU-C
Loopback data from network toward network at
H4R1
Loopback data from network toward network at
H4R2
Loopback data from network toward network at
H4R3
Loopback data from customer toward customer at
H4R1
Loopback data from customer toward customer at
H4R2
Loopback data from customer toward customer at
H4R3
Loopback data from network toward network at
HTU-R
Loopback data from customer toward customer at
HTU-R
1. The Source column indicates which side of the interface the control codes are sent from. For example, an (N)
indicates a network sourced code while a (C) indicates a customer sourced code.
2. All codes are in-band unless labeled ESF-DL.
3. All codes listed above must be sent for a minimum of 5 seconds to be detected and acted upon.