ADTRAN T200 HDSL4 Installation And Maintenance Practice page 26

Type
Abbreviated
Wescom
A-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.
A-2
All codes are in-band unless labeled ESF-DL
A-3
All codes listed above must be sent for a minimum of 5 seconds for them to be detected and acted upon.
A-2
Table A-1. HDSL4 Loopback Control Codes
1 2, 3
Source Code
...............
(N) ................ 3in7 (1110000)
Loopback data from network toward network in the HTU-R.
(N) ................ 4in7 (1111000)
Loopback data from network toward network in the HTU-C.
(N) ................ 2in6 (110000)
Loopback data from network toward network in first HRE.
(N) ................ 3in6 (111000)
Loopback data from network toward network in second HRE.
(C) ................. 6in7 (1111110)
Loopback data from customer toward customer in HTU-C.
(C) ................. 5in7 (1111100)
Loopback data from customer toward customer in HTU-R.
(C) ................. 4in6 (111100)
Loopback data from customer toward customer in first HRE.
(C) ................. 5in6 (111110)
Loopback data from customer toward customer in second HRE.
(N) ................ FF1E (1111 1111 0001 1110)
Loopback data from network toward network at HTU-C.
(C) ................. 3F1E (0011 1111 0001 1110)
Loopback data from customer toward customer at HTU-C.
(N) ................ FF04 (1111 1111 0000 0100)
Loopback data from network toward network at HRE1.
(N) ................ FF06 (1111 1111 0000 0110)
Loopback data from network toward network at HRE2.
(C) ................. 3F04 (0011 1111 0000 0100)
Loopback data from customer toward customer at HRE1.
(C) ................. 3F06 (0011 1111 0000 0110)
Loopback data from customer toward customer at HRE2.
(N) ................ FF02 (1111 1111 0000 0010)
Loopback data from network toward network at HTU-R.
(C) ................. 3F02 (0011 1111 0000 0010)
Loopback data from customer toward customer at HTU-R.
(C) ................. FF48 (ESF-DL) (1111 1111 0100 1000)
Loopback data from customer toward customer at HTU-R.
(N) ................ 1in6 (100000)
Loopback data from network toward network at HTU-R.
(N) ................ FF48 (ESF-DL) (1111 1111 0100 1000)
Loopback data from network toward network at HTU-R.
(N/C) ............. 1in3 (100)
Loop down everything.
(N/C) ............. FF24 (ESF-DL) (1111 1111 0010 0100)
Loop down everything.
Name
61222426L1-5B