Telepresence server / Conductor cannot go past 5 screen licenses.

Question

I have a IX5000, ex90 and sx80 CUCM 10.5, telepresence server running in VM using the 30 cpu config. It is the latest code. I have 10 license screen on it, For some reason if I try a conference call between the EX90, to SX80 then Conference in the IX5000, the conference fails and I get a license error on the Telepresence server,
I have it set for FULL HD 1080p and content is set same. If I drop to 720p and leave content at 1080p it works. I have not been able to understand why I cannot go past 5 screens. I look at conference and it says I am using 5 screen licenses.
With the configuration I have I should have no issue connecting all three endpoints in a Full HD 1080p conference.
Any one have any ideas?   Hope this all makes sense
ex80----calls ix5000- ex80 adds SX90 in and the merge fails when TS is set for 1080p

Answer 1

See page 84 of the admin guide at the following link:
http://www.cisco.com/c/dam/en/us/td/docs/telepresence/infrastructure/conductor/admin_guide/TelePresence-Conductor-Admin-Guide-XC3-0.pdf
Field: Maximum screens.
(Available when the Service Preference has a conference bridge type of TelePresence Server and when Allow multiscreen is set to Yes)
For TIP-compliant endpoints dialing into Rendezvous conferences using the TelePresence Conductor's B2BUA, this field specifies the maximum number of screens for which resources are allocated on the conference bridge. The TelePresence Conductor takes the lesser of the Maximum screens value and the number of screens specified by the TIP endpoint and allocates resources accordingly.
For pre-configured endpoints this setting is ignored and the number of screens defined for the pre-configured endpoint are allocated.
For endpoints that are neither TIP-compliant nor pre-configured, this setting is ignored and only a single screen is allocated, unless the endpoint is:
escalated into an ad hoc conference on the TelePresence Conductor
reserved as a host in a Lecture-type conference
using the Cisco VCS's external policy server interface to call into a rendezvous conference
If the endpoint falls into one of the categories listed above, the Maximum screens defines the number of screens for which resources are initially allocated on the conference bridge.
Essentially in an adhoc escalation with 3 screens set on the template, each endpoint will reserve 3 screens worth - or roughly 4 SL per endpoint like the IX5000 is doing at 1080p + 1080p content. 
This does not happen in a Rendezvous conference, with 1080p + 1080p content and 3 screens it would take up about 79% of the 10 Screen Licenses and will fit correctly with an IX5000 and two 1 screen endpoints like an SX80
-Jonathan