Table A-1. Hdsl2 Loopback Control Codes - ADTRAN DDM+ H2TU-C Installation And Maintenance Manual

A-1
Type Source Code
Abbreviated .. (N) .......... 3in7 (1110000) ........................................... Loopback data from network toward network in the H2TU-R.
(N) .......... 4in7 (1111000) ........................................... Loopback data from network toward network in the H2TU-C.
(C) ........... 6in7 (1111110) ........................................... Loopback data from customer toward customer in H2TU-C.
(C) ........... 5in7 (1111100) ........................................... Loopback data from customer toward customer in H2TU-R.
Wescom ........ (N) .......... FF1E (1111 1111 0001 1110) ................... Loopback data from network toward network at H2TU-C.
(C) ........... 3F1E (0011 1111 0001 1110) .................... Loopback data from customer toward customer at H2TU-C.
(N) .......... FF02 (1111 1111 0000 0010) ..................... Loopback data from network toward network at H2TU-R.
(C) ........... 3F02 (0011 1111 0000 0010) ..................... Loopback data from customer toward customer at H2TU-R.
(C) ........... FF48 (ESF-DL) (1111 1111 0100 1000) ... Loopback data from customer toward customer at H2TU-R.
(N) .......... 1in6 (100000) ............................................. Loopback data from network toward network at H2TU-R.
(N) .......... FF48 (ESF-DL) (1111 1111 0100 1000) ... Loopback data from network toward network at H2TU-R.
(N/C) ....... 1in3 (100) ................................................... Loop down everything.
(N/C) ....... FF24 (ESF-DL) (1111 1111 0010 0100) ... Loop down everything.
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 inband unless labeled ESF-DL
A-3
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. HDSL2 Loopback Control Codes

A-2, A-3
Section 61222003L1-5, Issue 1
Name
61222003L1-5A