Lucent Technologies Network Access Module - Manual (Page 66)

INA Module Maintenance Options
C-6 INA Module Installation and Configuration Guide
Demand Tests
The INA module board incorporates three new demand tests:
• Line loopback
• Payload loopback
• Bit error rate test (BERT)
Line Loopback Test
The line loopback test loops the T1 signal back towards the network without
regenerating framing and without recalculating a cyclic redundancy test (CRC)
checksum. To perform this test, you must first busy out the INA module. From your
system programming console, use the following sequence to start the line loopback test:
Menu: Maintenance
→
Slot
→
Slot#
→
Enter
→
Demand test
→
LineLpbk
After the line loopback test has been started, selecting
→
Back terminates the test.
Note – During the line loopback test, the INA module transmit clocking is derived from
the signal received by the INA module. The remote end of the T1 connection must be
set up as the clock master for the T1/PRI inrfco v(o)6.5il tilcloo