Nortel Networks 553-3001-211 manual Test Carrier T screen, Test parameters screen

NT5D33 and NT5D34 Lineside E1 Interface cards Page 295 of 894

Testing

The Test Carrier (T) command allows tests to be run on the LEI, the E1 link, or the CPE device. The three tests are designed to provide the capability to isolate faulty conditions in any of these three sources. See Table 103 on page 296 for additional information on these three test types. Enter the T command, and at the prompt, enter which of these three tests is to be initiated. The prompt is similar to Figure 54.

Figure 54

Test Carrier (T) screen

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 one 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 Stop Test stops a test with a duration selection of 99; however, the STOP command terminates a test set to any duration from one to 99. After entering the test number, a prompt similar to Figure 55 appears.

Figure 55

Test parameters screen

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

Test will interfere with traffic. Hit Q to quit or any Key to Continue

Before a test is run, be sure to verify that the card is disabled, as the tests interfere with calls currently in process.

During a test, if an invalid word is received, this is recorded by a failure peg counter. The peg counter has a limit of 65,000. At the end of the test, the Test Results message indicates how many failures, if any, occurred during the test.

Circuit Card Description and Installation