ADTRAN 1200287L1 Manual de usuario descargar pdf (Pagina 159)

Appendix A. Acceptance Test Procedure

61185001L1-1 MX2810 M13 User Manual A-7

5. The MX2810 will be in an alarm condition because of the previously

tested and now un-terminated DS1 ports, but this should not prohibit a

successful BERT between the DS1 and DS3 test sets on the channel

under test.

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.

DS1 Daisy-chain to DS3 (Hard) Loopback

(can only be used if DS1s are terminated at the DSX1)

This test can be performed single-handedly. It loads all 28 ports of the

MX2810 with traffic at the same time, but it does not

confirm DS3 cabling

integrity (transmit Vs receive).

Equipment Required: • 1 DS1 Test Set for running a BERT

• 28 DS1 Bantam test cords

• 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 panel, insert the TRANSMIT of the DS1

test set into the INPUT of the first DS1 channel of the MX2810.

3. At the DSX-1, install a Bantam test cord from the OUTPUT of the

first DS1 channel to the INPUT of the second, then connect a second

Bantam test cord from the OUTPUT of the second DS1 channel to the

INPUT of the third DS1 channel. Repeat this procedure for all 28

DS1 channels.

4. Connect the OUTPUT of the 28th DS1 channel to the RECEIVE of

the DS1 test set.

5. Set the test set options for ESF/B8ZS and run a standard BERT using

QRSS or other preferred test pattern(s).

6. 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.

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ADTRAN 1200287L1 Manual de usuario Pagina 159