ADTRAN T200 H2TU-R Installation And Maintenance Manual page 22

Type Source
Abbreviated (N) ........... 3in7 (1110000) ............................................... Loopback data from network toward network in
(N) ........... 4in7 (1111000) ............................................... Loopback data from network toward network in
(C) ............ 6in7 (1111110) ............................................... Loopback data from customer toward customer
(C) ............ 5in7 (1111100) ............................................... Loopback data from customer toward customer
Wescom (N) ........... FF1E (1111 1111 0001 1110) ...................... Loopback data from network toward network at
(C) ............ 3F1E (0011 1111 0001 1110) ........................ Loopback data from customer toward customer
(N) ........... FF02 (1111 1111 0000 0010) ........................ Loopback data from network toward network at
(C) ............ 3F02 (0011 1111 0000 0010) ........................ Loopback data from customer toward customer
(C) ............ FF48 (ESF-DL) (1111 1111 0100 1000) ...... Loopback data from customer toward customer
(N) ........... 1in6 (100000) ................................................. Loopback data from network toward network at
(N) ........... FF48 (ESF-DL) (1111 1111 0100 1000) ...... Loopback data from network toward network at
(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-1 A-2, A-3
Code
Section 61222026L1-5, Issue 2
Name
the H2TU-R.
the H2TU-C.
in H2TU-C.
in H2TU-R.
H2TU-C.
at H2TU-C.
H2TU-R.
at H2TU-R.
at H2TU-R.
H2TU-R.
H2TU-R.
61221026L1-5A