Owner's manual

Man-Machine T1 maintenance interface software 245

Figure 44

MMI network loopback test

The Test Carrier (T C) command set enables tests to be run on the

Lineside T1 card, the T1 link, or the CPE device. These three tests provide

the capability to isolate faulty conditions in any one of these three sources.

See Table 96 "MMI Tests" (page 246) for additional information on these

three test types.

After entering the T C command set, select which test to start. The prompt

appears, similar to the following:

Test 1: Local Loopback Test

Test 2: External Loopback Test

Test 3: Network Loopback Test

(1,2,3 or S to cancel):

Tests can be performed once (for 1 through 98 minutes), or continuously

(selected by entering 99 minutes) until a "Stop Test" command is entered.

Tests continue for the duration specified even if a failure occurs, and

terminate at the end of the time period or when a "Stop Test" command is

issued. Only a "Stop Test" command stops a test with a duration selection

of 99. After entering the test number selection, a prompt similar to the

following appears:

Enter Duration of Test (1-98 Mins, 0 = Once, 99 = Forever)

Verify DS-30A Links are disabled.

Hit Q to quit or any Key to Continue

Before a test is run, verify that DS-30A links are disabled because the

tests interfere with calls currently in process.

During a test, if an invalid word is received, a failure peg counter is

incremented. The peg counter saturates at 65,000 counts. At the end of

the test, the Test Results message indicates how many failures, if any,

occurred during the test.

Table 96 "MMI Tests" (page 246) shows which test to run for the

associated equipment.

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311 02.06 Standard

27 August 2008