Lucent Technologies 555-233-119 Troubleshooting Multimedia Call Handling (MMCH)

DEFINITY ECS Release 8.2 Maintenance for R8.2csi 555-233-119 Issue 1
April 2000
Maintenance for csi systems
1-135Troubleshooting Multimedia Call Handling (MMCH)
1
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 between the A
and B side of the EPN.
Troubleshooting Multimedia Call
Handling (MMCH)
Before troubleshooting any prob lems associated with the DEFINITY MMCH,
always be sure that the endpoint is operating correct ly (audio, video, and d ata)
by making point-to-p oint test calls. If possib le, make the test calls over the
network to test the connectivity and routing of network calls from the end point.
This eliminates problems such as d isconnected aud io or video cables and
network troubles.
64 Kbps Calls Terminate but Far End Receives
56 Kbps Indication
Description
Some 2x64 Kbps conferences o n the DEFINITY MMCH do not establish because
of framing, audio, or vid eo problems.
For calls that are routed in the network through a Luc ent Technologies/LEC
interface, the originating equipment may launc h a 64 Kbps call attemp t, and the
far end receives either a 56 Kbp s or 64 Kbps indic ation. If the far end receives a
64 Kbps indic ation, the call may have used 56 Kb ps facilities. If so, the c all may
exhibit any of the following c onditions:
■No handshaking in one direc tion or both (call d isconnects after timeouts)
■Call connects, but aud io or video is corrup ted (audio noise or no vid eo)
■Call succeeds without d isruption (this is the least likely since one endpoint
must be aware that the call is really 56 Kb ps to connect)
If any of the above conditi ons occur, then 64 Kbp s calls from the site are
blocked.
Solution
Administer the conference for c onnection at 56 Kbp s.