Black Box LRU4240 - Manual (Page 83)

Dual Trunk E1 Router
Dual Trunk E1 Router User’s Guide TECHNICAL: 0118 96 56 000 71
When performing a test, you can:
• Initiate loopbacks and tests on full bandwidth or on NET 1 or NET 2.
• Set programmable test patterns
Link Layer Diagnostics and Delay Monitoring
When installing or maintaining wide area connections, you must verify the end-to-end operation of
the WAN links. With dedicated E1 line, you can verify the WAN link by placing the Dual Trunk E1
Router on one end of the line in a loopback test and initiating the transmission of a pattern test from
the other end. The pattern is received and monitored to detect transmission errors.
Table 8-3 Tests Allowed Through Telnet Connection
Test COM NET
Self Test Yes Yes
Loop Net Yes No
Loop Payload Yes No
Loop Up Remote Yes No
Loop Down Remote Yes No
QRW Pattern Yes No
1:7 Pattern Yes No
3:24 Pattern Yes No
1:1 Pattern Yes No
All 1s Pattern Yes No
All 0s Pattern Yes No
1:2 Pattern Yes No
1:4 Pattern Yes No
User 1 Pattern Yes No
User 2 Pattern Yes No
Lamp Test Yes Yes
NOTE: You do not need to notify the telephone company that you are running
the tests. However, if the tests reveal a problem with telephone company
service or with the Dual Trunk E1 Router, you should inform the telephone
company that the Dual Trunk E1 Router must be removed from service.