DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Alarms, Errors, and Troubleshooting
5-64Multimedia Call Handling (MMCH)
5
No Switching, Full Motion Video
If a room is excessively noisy, the DEFINITY MMCH may receive sufficient audio
signal to conclud e that there is a speaker present. Use the Status Conference x
form to determine if the MMCH thinks an endp oint is talking. The MMCH sets the
Ts field to t for each endp oint if there is voice energy detec ted. This endpoint
may have to mute when nobody at the site is speakin g to allow the conference to
proceed normally. Remind the customer that it may be necessary to mute if a
side conversation is goin g on in the background , just as one would do in an
audio conference. If the system does not switch broadc asters even after the
current broadcaster has muted, check the c onference administration using the
display conference X command to ensure that the c onference is in
voice-activated mod e. Also verify that parties who were sp eaking are valid video
sources as describ ed in the “Calls Terminate with No Video” section above.
The See-Me feature (MCV) can also cause VAS to “lock-up.” An endp oint can
activate MCV to force their site to bec ome the broadcaster. If t hey do not disable
the feature when finished, the system remains in this mode ind efinitely. Beginning
with Release 3.0, the status conference X command shows that MCV is in effect
by displaying av in the Video Status (Vs) column. Page 3 of the Status
Conference X Endpoint Y form also has a Broadcaster field that indic ates MCV
is in e ffec t with ( SEE-ME) as the b road cast er. The s ame sc enar io ca n occ ur in a
CHAIR or UCC-controlled conference with a d esignated broadc aster. In this
situation the CHAIR/UCC has not released the designated b roadcaster and
returned to VAS mode. If there is a UCC-designated broad caster, status
conference X indicates a Video Status of u. Also, for UCC rollcall th e return
video may appear to b e stuck. Check the Video Status for an “R,” indicating
rollcall.
If none of the examples above ap pears to be the cause, and if the room was
quiet, all speakers are valid v ideo sources, the conference i s voice-activated,
and the speaker can b e heard, then escalate the prob lem.
Video Never Switches to a Particular Party
Description
Verify that the endpoint is a valid video sourc e as described in the “Calls
Terminate with No Video” section above. If it is, then the audio from the endpoint
may not have sufficient voice sig nal for the hardware to determine the par ties at
the endpoint are speaking . Check the Talk field on pag e three of the Status
Conference X Endpoint Y form to see if the talking bit is y. Next, check the
audio by standing adjacent to the microp hone and speaking at a norm al level.
Solution
If the audio is not muffled:
1. Use the status conference command to determin e which port on the
TN788B (VC board) is connected to this endpoint.