Nortel Networks 553-3001-211 manual MMI Tests Test number Equipment tested Test description

Page 230 of 894 NT5D11 and NT5D14 Lineside T1 Interface cards

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 will stop a test with a duration selection of 99. After entering the test number selection, a prompt similar to the following will appear:

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 since the tests will 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 will indicate how many failures, if any, occurred during the test.

Table 86 shows which test to run for the associated equipment.

Table 86

MMI Tests

Test number	Equipment tested	Test description
1	Lineside T1 card	Local loopback
2	T1 link, lineside T1 card	External loopback
	and T1 network
3	CPE device and T1	Network loopback
	network

Test 1, local loopback, loops the T1 link signaling toward itself at the backplane connector, and test data is generated and received on all timeslots. If this test fails, it indicates that the lineside T1 card is defective. Figure 31 on page 231 demonstrates how the signaling is looped back toward itself.

553-3001-211 Standard 2.00 September 2004