Check whether alarms or errors are present against the packet bus.
If there are no alarms or errors, go to step 5.
Check whether the system is a critical reliability (duplicated PNC) system.
If the system is not a critical reliability system, go to step 5.
Check for alarms or errors against M/T-PKT.
If there are no alarms or errors against M/T-PKT, go to step 5.
Follow the repair procedure for M/T-PKT.
Check whether the problem is isolated to the PPN.
If the problem is not isolated to the PPN, check for alarms or errors against EXP-INTF and follow the repair procedure for EXP-INTF to resolve the problem. When there are no alarms or errors against EXP-INTF, go to step 6.
Check for alarms or errors against PKT-INT.
If there are no alarms or errors against PKT-INT, go to step 10.
Follow the repair procedure for PKT-INT.
Check whether the ISDN-BRI problem is resolved.
If the problem is resolved, no further steps are required.
If the problem persists, follow the repair procedure for PKT-BUs and go to step 13.
Check whether the problem affects MOs on multiple BRI-BD circuit packs.
If the problem affects multiple MOs on multiple BRI-BD circuit packs, go to step
If the problem affects MOs on only one BRI-BD circuit pack, check whether the the problem affects multiple MOs on the same BRI-BD circuit pack.
Follow the repair procedure for BRI-PORT, BRI -DAT, ABRI-PORT, BRI-SET, or ASAI-ADJ as appropriate.
Check whether the ISDN-BRI problem is resolved.
If the problem is resolved, the procedure is complete. If not, escalate the problem.
