Pages 22, 352 and 353 of the following document mentions the scenarios for the consumption of RMS license
http://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/admin_guide/Cisco-Expressway-Administrator-Guide-X8-8.pdf
Regarding the Rich Media calls, it is written on page 353,
Rich Media Sessions: these calls consume rich media session (RMS) licenses and consist of every other type of video or audio call that is routed through the Expressway. RMS licenses are consumed on the exit node of the Expressway in the following scenarios:
■ B2B
■ B2BUA
■ Jabber Guest
■ Interworked or gatewayed calls to third-party solutions
■ Interworked SIP to H.323 calls ( RMS license is consumed on the node where interworking takes place)
■ Interworked IPV4 to IPV6 calls
The Expressway may take the media or just the signaling
A few things are not very clear from this document, as follows:-
a) Does it mean that RMS license will be consumed in the call flows, where either Expressway-C or Expressway-E is used as exit node, i.e. when trunks to external or third party devices/gateways are made from one of the expressways? OR does it mean that the RMS license will be consumed only on the exit node (i.e. Expressway-C or Expressway-E), as earlier RMS licenses were needed on both C and E?
b) Do we need RMS licenses for calls to third party gateways via SIP trunks from CUCM. E.g. for the below call flow, do we need a RMS license?
MRA Jabber client -------> Expressway-E -------> Expressway-C ------> CUCM -------SIP---------> non-Cisco SBC (or to devices not specified in the definition below and on page 352 of the doc) ----------> end destination
Calls from registered systems (as above) to Cisco infrastructure do not use RMS licenses. Currently, this extends only to Acano server, or to TelePresence Server when managed by TelePresence Conductor --------> So what about trunks to other Cisco gateways and SBCs?
