ADTRAN 1200287L1 Manual de usuario descargar pdf (Pagina 160)

Appendix A. Acceptance Test Procedure

A-8 MX2810 M13 User Manual 61185001L1-1

7. Leave this test set-up in place, as it will be used during the

redundancy testing portion of this document. Proceed to Alarm

Verification.

DS1 to DS3 (Hard) Loopback

This test requires minimal test equipment, tests one DS1 at a time and can

be performed single-handedly. It does not verify DS3 cabling integrity

(transmit Vs receive) to the DSX3 or connecting equipment.

Equipment Required: • 1 DS1 Test Set capable of running a BERT test

• 1 DS3 Test Cord

1. At the DSX-3 cross-connect panel or connecting equipment, loop the

DS3 from the MX2810 back on itself. Confirm that the MX2810 sees

a good DS3 signal (DS3 STATUS LED is solid Green on the Active

Controller) and that the DS3 Test Set is in frame synchronization with

the MX2810.

2. At the DSX-1 cross-connect bay or connecting equipment, insert the

TRANSMIT of the DS1 test set to the DS1 INPUT of the first channel

of the MX2810. Connect the RECEIVE of the test set to the

OUTPUT of the first DS1 channel of the MX2810.

3. Configure the DS1 test set for ESF/B8ZS and the desired BERT

pattern, e.g., QRSS.

4. All alarms should clear on the MX2810 and the BERT should run

error free for a minimal period, e.g., 15 seconds. Troubleshoot as

necessary.

5. Repeat the above procedure for DS1 channels 2-28. The MX2810

will be in an alarm condition because of the un-terminated DS1 ports,

but this should not prohibit a successful BERT.

6. Leave this test set-up in place, as it will be used during the

redundancy testing portion of this document. Proceed to Alarm

Verification.

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ADTRAN 1200287L1 Manual de usuario Pagina 160