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15. Test Commands
15-2
August 2002 4200-A2-GB20-00
OPR-LPBK-T1
The OPR-LPBK-T1command places a specific T1 facility in loopback mode.
Response Format
If, in less than 2 seconds, a normal or error response cannot be sent, the following
acknowledgment response is sent:
IP c
After the above response, a new command input may be generated.
Normal Response:
sid yy-mm-dd hh:mm:ss
M c COMPLD
/* OPR-LPBK-T1:[tid]:aid_ds1:[ctag]::,,,[lpbktype] */
;
Table 15-1. OPR-LPBK-T1 Command Parameters
OPR-LPBK-T1:[tid]:aid_ds1:[ctag]::,,,[lbktype];
RESTRICTIONS:
All parameters in this command are position-defined.
Loopbacks are supported for the near end (NEND) of the facility only.
Loopbacks configured with this command are subject to the overall system test
timeout.
The near end of the facility can also be placed in loopback by sending DS1 in-band
loopback control codes.
Only one loopback at a time is allowed on a facility.
[tid] Identification of the target NE. The default value is null. The NE SID
code is the only other valid value.
aid_ds1 Access Identifier for the T1 facility. The value can be preceded with
AID=, but this is not required. Enter in any of the following formats,
replacing lower-case parameters with the values given:
NTT1-circuit
– circuit: DS1 circuit on the NT (1)
[ctag] Correlation tag (6 characters maximum) that links an input command
with associated output responses. The default is 0.
[lpbktype] Type of loopback. Valid values are:
LINE: Loopback facility at the physical line level toward the facility
(default)
PAYLOAD: Loopback facility data (payload) toward the facility