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Alarms, Errors, and Troubleshooting
555-233-143
4-62
Issue 1 May 2002
64-kbps Calls Terminate, but Far End Receives
56-kbps Indication
Description
Some 2 x 64-kbps conferences on the S8700 Multi-Connect MMCH are not
established because of framing, audio, or video problems.
For calls that are routed in the network through an Avaya/LEC interface, the
originating equipment may launch a 64-kbps call attempt, and the far end receives
either a 56- or 64-kbps indication. If the far end receives a 64-kbps indication, the
call may have used 56-kbps facilities. If so, the call may exhibit any of the
following conditions:
■
No handshaking in one direction or both (call disconnects after timeouts)
■
Call connects, but audio or video is corrupted (audio noise or no video)
■
Call succeeds without disruption (least likely, since one endpoint must
realize that the call is using 56-kbps facilities)
If any of the above conditions occur, then 64-kbps calls from the site are blocked.
Solution
Administer the conference for connection at 56 kbps.
Calls Terminate with No Audio
Description
To support endpoints that do not support Multipoint Command Conference (MCC),
the S8700 Multi-Connect MMCH changes its capability set and initiates a
capability set exchange with the endpoint when the Selected Communications
Mode (SCM) changes. If the endpoint does not follow the SCM audio mode, the
MCU may include the endpoint as a secondary (audio only) endpoint. If the
endpoint sends an unknown or unsupported audio mode, then the TN788B
decoder port mutes the endpoint from the conference. The user may hear the
conference but may not be heard by other conference parties.
Solution
1. Use the Status Conference x form and check the
Audio Mode
field for the
current operating mode of the conference.
2. Another indication of the audio modes is in the “Incoming Mode
Commands from Endpoint and Outgoing Commands from MMI” on page 3
of the Status Conference x Endpoint y form. Check the
Audio
fields under
the Mode Commands/Communication Modes section of the form.
Summary of Contents for S8700 Series
Page 50: ...Maintenance Architecture 555 233 143 1 26 Issue 1 May 2002 ...
Page 74: ...Initialization and Recovery 555 233 143 3 12 Issue 1 May 2002 ...
Page 186: ...Alarms Errors and Troubleshooting 555 233 143 4 112 Issue 1 May 2002 ...
Page 232: ...Additional Maintenance Procedures 555 233 143 5 46 Issue 1 May 2002 ...
Page 635: ...status psa Issue 1 May 2002 7 379 555 233 143 status psa See status tti on page 7 406 ...
Page 722: ...Maintenance Commands 555 233 143 7 466 Issue 1 May 2002 ...