Step 1: At switch under test; make all trunks busy to Telco Tandem switches.

Step 2: Initiate 9-1-1-test call from each NNX test number.

Step 3: Verify proper all trunks bust indication (120 IPM).

Step 4: Un-Busy trunk #1 to the "Primary Route" Telco Tandem switch.

Step 5: Initiate 9-1-1 test call from each NNX test number, associated with the PSAP (See test number list).

Step 6: Verify correct ALI/ANI information with the 9-1-1 PSAP calltaker.

Step 7: Disconnect the test call.

Step 8: Make the trunk just tested busy and un-busy the next trunk in the primary route trunk group.

Step 9: Repeat steps 5 through 8 progressing through all trunks in the primary route trunk group correcting/document ting any problems encountered.

Step 10: Un-Busy trunk #1 to the "secondary route" Telco Tandem switch.

Step 11: Repeat steps 5 through 9 progressing through all trunks in the secondary route trunk group.