DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-1682TBRI-PT (TN2185 ISDN Trunk-Side BRI Port)
9
BRI Port Local LAN Looparound Test (#618)
This test is destructive
.
This test checks the connectivity of the BRI port across the LAN bus. Because
this test is destructive, run this test only if the port is out-of-service.
Failures of this test indicate either on-board faults associated with the TBRI-PT
hardware on the circuit pack or problems with the LAN Bus, which is used to form
connectivity between the switch and the TBRI-PT.
If the port is in a state other than out-of-service, the BRI Port Local LAN
Looparound Test will abort. If the port is out-of-service, then the port is put into a
local looparound mode and the following test is executed.
A looparound test is performed across the Packet Bus for the D-Channel. The
switch sends data over a packet connection, which is looped back by the BRI
port (D-Channel) and received back by the switch. The test passes if the packet
connection can be established and the transmitted data is received unaltered.
The test aborts if the Packet Bus is alarmed in the Processor Port Network (or the
port network in which that circuit pack resides) or if the Packet Interface board is
out-of-service. The test fails due to either on-board faults associated with the BRI
port hardware on the circuit pack or problems with the LAN bus.
1, 2 FAIL The NPE of the tested port was found to be transmitting in error, causing
noisy and unreliable connections. Error code 1 indicates that the NPE
Crosstalk Test failed on Channel B1. Error code 2 indicates that the NPE
Crosstalk Test failed on Channel B2.
1. Replace circuit pack.
PASS The port is correctly using its allocated time slots.
1. To be sure that this is not an intermittent problem, repeat this test a
maximum of 10 times to ensure it continues to pass.
2. If complaints still exist, examine the connections and wiring.
Table 9-630. TEST #617 NPE Crosstalk Test — Continued
Error
Code
Te s t
Result Description/ Recommendation
Continued on next page
