Nortel Networks Circuit Card - Manual (Page 307)

NT5D33 and NT5D34 Lineside E1 Interface cards Page 307 of 906
Circuit Card Description and Installation
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 108 on
page 308 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 57.
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 58 appears.
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.
Figure 57
Test Carrier (T) screen
Figure 58
Test parameters screen
Test 1: Local Loopback Test
Test 2: External Loopback Test
Test 3: Network Loopback Test
(1,2,3 or S to cancel):
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