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Gotcha. &nbsp;Thank you - very helpful.
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How do you create a h.323 trunk from Cisco UCM 7.1 to an Avaya S8300? &nbsp;I have done this on Call Manger Express. &nbsp;When I went to add trunk in UCM I only saw options for inter-cluster, intra-cluster, h.225 gatekeeper controlled, SIP trunk. 
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How do you create a h.323 trunk from Cisco UCM 7.1 to an Avaya S8300?  I have done this on Call Manger Express.  When I went to add trunk in UCM I only saw options for inter-cluster, intra-cluster, h.225 gatekeeper controlled, SIP trunk. 

Cisco UCM h.323 Trunk to Avaya

IP telephony (Internet Protocol telephony) is a general term for the technologies that use the Internet Protocol's packet-switched connections to exchange voice, fax, and other forms of information that have traditionally been carried over the dedicated circuit-switched connections of the public switched telephone network (PSTN). Using the Internet, calls travel as packets of data on shared lines, avoiding the tolls of the PSTN. The challenge in IP telephony is to deliver the voice, fax, or video packets in a dependable flow to the user.