1.

Use with any portable ISDN BRI Test Set.

2.

The TSI-1569 is installed permanently in the Central Office (CO) in a 19/23-inch rack. The CO technician will assign a TABLE PHONE TEST number with a rollover feature capability according to the switch translation table. This number will allow the field test technician to dial to the TSI-1569. Once accessed the TSI-1569 will perform a Pass/Fail BERT test from the CO toward the handheld unit.

3.

Set the BERT Test in the TSI-1569 by typing table phone-num test patt-num num-sec num-bit-err. This setup is performed when the TSI-1569 is installed in the CO.

4.

Set the portable ISDN BRI test set in loopback mode.

5.

Dial the TSI-1569 table number corresponding to the pattern, error specifications and allows the TSI-1569 to start the test.

6.

The TSI-1569 will start the test by trying to connect for 15 seconds sending the test pattern. If the hand held BRI unit is not in loopback mode the technician will hear an Alerting Tone (NO SYNC) for a duration of 10 seconds. The TSI-1569 will try to SYNC again for a duration of 10 seconds if it cannot SYNC it will send and Alerting Tone (NO SYNC) for 10 seconds and will disconnect the test.

7.

The BERT test will run for a period of time established in item 3. At the end of the test the technician will hear a continuous 1004Hz tone which is defined as a TEST PASS tone or a GOOD LINE.

8.

If during the test the total error count exceeds the threshold number as set in item 3, or if SYNC is lost, the technician will hear an Alerting Tone which will be defined as a TEST FAILED or BAD LINE.

9.

By selecting different Table Phone numbers the user can select several test patterns, different test duration and different bit error threshold.

10.

Using the TSI-1569 will allow several technicians to test and install ISDN BRI lines all at the same time.