Avaya Communication Manager Administrator's Manual page 295

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To end the data collaboration session and retain the voice/video conference, the station that
selected the mm-datacnf button or FAC may press the mm-datacnf button or hit transfer and dial
the mm-datacnf deactivation FAC.
NOTE:
Currently, many endpoints do not respond correctly to ending the data collaboration
session and retaining voice/video. Some H.320 DVC systems drop the entire call. Avaya
recommends that once T.120 data sharing has been enabled for a conference, that it remain
active for the duration of the conference call. When all endpoints have dropped from the
call, the T.120 resources will be released.
Joining a multimedia conference after T.120 data sharing has been enabled.
If a multimedia conference with T.120 data sharing is already active and it is desired to conference in a
new video endpoint, the new video endpoint can be conferenced into the existing call. The new endpoint
will be allowed into the data conference if there exists sufficient ESM server resources for the new
endpoint. The new endpoint will get voice/video and data sharing if the new endpoint supports the data
rate chosen by the system when T.120 data collaboration was activated. If the endpoint does not support
the pre-existing data rate, the new endpoint will only receive voice and video.
Activating HOLD while on a T.120 data collaboration conference.
If an Enhanced multimedia complex is active on a multimedia call and the call has activated T.120 data
collaboration, the user should be receiving voice/video and data. If the station places this existing call on
hold, audio and video will be disconnected for the current call. The data collaboration portion of the call
will remain intact and unaffected. While this T.120 data conference is on hold, the user will only be
allowed to receive audio on all other call appearances. Thus a user is limited to one call appearance that
has T.120 data collaboration active.
Single server or switch data collaboration.
When all parties involved in data collaboration conference are located on the same physical Avaya
DEFINITY® Server or media server, there is no restriction on the type of user. The parties may be any
combination of Enhanced multimedia complexes, Basic multimedia complexes or stand-alone H.320
DVC systems.
Multi-switch data collaboration.
When all parties involved in data collaboration conference are not located on the same physical Avaya
media server, the parties located on the Avaya server hosting the data conference (i.e. the server that
activated mm-datacnf) may be any combination of Enhanced multimedia complexes, Basic multimedia
complexes or stand-alone H.320 DVC systems.
NOTE:
All parties on remote servers must not be Enhanced multimedia complexes. They must be
Basic multimedia complexes or stand-alone H.320 DVC systems.
Prior to originating or receiving a multimedia mode call, the mm-basic feature button or feature access
code can be used to dynamically change an Enhanced mode complex into a Basic mode complex and
back again.
Administrator's Guide for Avaya Communication Manager
November 2003
Managing MultiMedia Calling
Enhanced Mode MM Complex
295