Design and Deployment Checklist
Question 15: For shared control of IP sets, is the network region of the Avaya IP Softphone the same as the IP set?
Use the change
Note:
For shared control when using video, the only option supported is via the server. Do not try using the via the phone (CTI) option.
Yes.
No. Do not do this. This is not supported, so expect undefined results. When using shared control with video, the network region used for Avaya IP Softphone must match the network region used by the IP set. For Avaya Communication Manager Release 5.0 and later, this will not be a limitation.
26 Avaya Video Telephony Solution Networking Guide