User Guide

DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Routine Maintenance Procedures
Page 5-75Install DS1 CPE Loopback Jack (T1 Only)
5
section 2 wiring if there are no problems in the wiring between the
far-end CO and the far-end ICSU. Coordinate this test with the DS1
service provider.
If any of the above tests (a, b, or c) fail, a problem is indicated in section 2
as long as the tests for section 1 and section 3 pass. Since section 2
includes the network interface point, it is necessary to work with the
service provider to isolate the fault to the loopback jack cable, the “dumb”
block, or the Smart Jack.