Lucent Technologies Release 7 DS1 Interface Options Audit Test (#798)

DEFINITY Enterprise Communications Server Release 7

Maintenance for R7r

555-230-126 Issue 4

June 1999

Maintenance Object Repair Procedures

DS1 Interface Options Audit Test (#798)

This test is non-destructive.

2500 ABORT Internal system error

1. Retry the command at 1-minute intervals a maximum of 3 times.

FAIL Far-End Internal loopback failed. A problem exists between DS1 CONV A and

the internal interface for DS1 facility on the DS1 CONV B (see diagram above).

1. If the test is executed as a part of an error analysis, then return back to the

related section.

2. Enter display errors and follow the associated repair procedures for any

on-board DS1 CONV-BD errors on this DS1 CONV circuit pack and the

DS1 CONV circuit pack at the o ther end of the DS1 CONV Complex.

3. If the network is used instead of private T1 lines, verify that the DS1 facility

and the network are using the same Line Coding. For TN574 boards and

TN1654 boards in T1 mode, also verify that the Framing Mode used is the

same. Use list fibers and display fiber-link commands to check the

values for this DS1 facility. Contact T1 Network Service to check the

modes used by the network. See the above sections, “Line Coding” and

“Framing Mode” for details on how these options apply to the TN574 and

TN1654 DS1 CONV boards.

4. Isolate the problem by running the Near-end External Loopback test #799

via the test ds1-facility UUCSSf external-loopback command, first at

this end and then at the other end of the DS1 CONV Complex. Setup

loopbacks at different points as shown in the description diagram for test

#799, and follow repair procedures described for test #799.

5. If the problem could not be found b y near-end external loopback tests,

then the fault should be between the CSU A and the CSU B. Contact T1

Network Service to resolve the problem, also see the repair procedures for

error type #1025 (Loss of Frame Alignment).

Any PASS Transmission through the path of the loopback is successful. TN1654 DS1

facilities will display the round trip delay time in milliseconds in the Error Code

field. The round trip delay time is defined as the length of time in milliseconds it

takes for the firmware to receive the test pattern after it has been sent.

Table 9-256. TEST #797 Far-End Internal Loopback Test — Continued

Error

Code Test

Result Description/ Recommendation

Continued on next page