DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Alarms, Errors, and Troubleshooting
5-59Multimedia Call Handling (MMCH)
5
Swapped Routes, End System Identifiers, or Fiber

between A and B side TN230Xs on an EPN

Symptoms
â– The PPN establishes links to what it thinks is the active TN230X on the
EPN.
â– As normal, it reboots this TN230X, and when comp lete, it resets the EPN.
When this happens, the active (instead of the standby) TN230X reboots,
dropping the links.
â– To recover, the PPN re-establishes links to what it thinks is the active
TN230X and the cycle repeats ind efinitely.
Diagnostics
1. The status pnc command on the DEFINITY SAT shows both the A-side
and B-side State of Health field as partially functional.
Action
1. Correct the ATM addresses (or swap fibers) on the A500 b etween the A
and B side of the EPN.
Multimedia Call Handling (MMCH)

Expansion Services Module

The Expansion Services Module (ESM) provides T.120 data sharing capability on
a MMCH multipoint H.320 video c onference. Each conference p articipant must
have endpoints administered and a personal c omputer with the H.320 video
application installed . The DEFINITY ECS must have the expansion servic e
module installed.
Figure 5-37. Typical ESM connections
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