ADTRAN HTU-C M R Installation And Maintenance Manual page 22

Type Source
Abbreviated (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.
Wescom (N) ................ FF1E ............................. Loopback data from network toward network at HTU-C.
(C) ................. 3F1E ............................. Loopback data from customer toward customer at HTU-C.
(N) ................ FF04 ............................. Loopback data from network toward network at HRE1.
(N) ................ FF06 ............................. Loopback data from network toward network at HRE2.
(C) ................. 3F04 .............................. Loopback data from customer toward customer at HRE1.
(C) ................. 3F06 .............................. Loopback data from customer toward customer at HRE2.
(N) ................ FF02 ............................. Loopback data from network toward network at HTU-R.
(C) ................. 3F02 .............................. Loopback data from customer toward customer at HTU-R.
(C) ................. FF48 (ESF-DL) ............ 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) ............ Loopback data from network toward network at HTU-R.
(N/C) ............. 1in3 (100) ..................... Loopdown everything.
(N/C) ............. FF24 (ESF-DL) ............ Loopdown everything.
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.
All codes are inband unless labeled ESF-DL
All codes listed above must be sent for a minimum of 5 seconds in order for them to be detected and acted upon.
A-2
Table A-1. HDSL Loopback Control Codes
Code Name
Section 61245001L6-5, Issue 7 61245001L6-5G