Regarding your Q4, in order to monitor the TP or DX endpoints they don't have to be plug into specific type of switches. They just need to reachable via the required (SNMP/HTTP) credentials. Only when you want to troubleshoot the quality of experienc...
Not for IP Communicator but we are working with Jabber team to support Video and Audio Call quality information in CDR/CMR. This is expected to be in 2HCY14.--Selva