Single Site
Multisite Centralized Call Processing
Multisite Distributed Call Processing
Clustering over the WAN EDMT - Enhanced Database Migration Tool
Cisco Prime Collaboration Assurance(PCA) - UCCE morning tool
OVA -Open Vertualization Archive
OVF -OPen Vertualization Format
GUID is the Global Unique Identification number that is generated by the gateway for each call, this is exactly the same that is passed to the CVP application as "callid".
https://community.cisco.com/t5/collaboration-voice-and-video/ct-p/4691-collaboration-voice-video
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