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 callback 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 allow the technician to test and turn up the ISDN BRI line, by ringing the portable ISDN BRI test set, setting up loopback and allowing for BERT testing.

3.

Set the callback number in the TSI-1569 by typing table phone-num callback. This setup will be done once the TSI-1569 is installed in the CO.

4.

Go off hook in the portable ISDN BRI test set. A dial tone should be heard.

5.

Dial the TSI-1569 CALLBACK number.

6.

The Model 1569 will automatically respond with a tone acknowledging the connection and providing a loopback for BERT test.

7.

The technician can start a BERT test.

8.

If the calling number is not passed to the TSI-1569 it will respond with an alarm audible tone then will go into a loopback for BERT testing.

9.

Twenty-three (23) separate and simultaneous ISDN BRI Turn-Ups can take place using the TSI-1569.

10.

To verify caller ID or ANI after the tone is heard, the technician should hang up by going ON HOOK with the portable ISDN-BRI test set.

11.

The TSI-1569 then places a call back to the portable ISDN BRI test set.

12.

When the portable ISDN BRI test set answers, the TSI-1569 will respond with a tone to acknowledge the connection, then enter a loopback state allowing the technician to use the BERT feature of the portable ISDN BRI test set to verify the line connection.