ADTRAN T200 H2TU-R, Руководство по установке и обслуживанию

Страница: 22 / 24

A-2 Section 61222026L1-5, Issue 2 61221026L1-5A
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.
Table A-1. HDSL2 Loopback Control Codes
Type Source
A-1
Code
A-2, A-3
Name
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.