Hearing some voice cut-off when either party stops talking. Does matter if it is an outside call over a SIP trunk or an internal extension to extension call.
FreePBX is version FreePBX 188.8.131.52
Phones are Aastra 9143i with FW version 184.108.40.2065 dated 13 Dec 13.
There is almost nothing else happening on the network at the moment (everyone else is pretty much out to lunch).