i have started to maintain a 4.1(3)sr2 callmanager with about 150 phones and two 2821 routers with e1 connections running ios 12.4(3c)
Apparently the odd user has complained that at any point during a call the voice path from the ip phone drops. i.e the ip phone can still hear but the person on the other end cannot.
It only occurs during external calls and has been happening since the system went in two years ago.
My first thought is that this is a bug either in the phone load or in the ios gateway though i can't seem to find any related bug.
I know i probably need to to an upgrade to sr6 but was wandering whether anyone else had seen a similiar issue.
The issue is always in the same direction and there is no break up in the voice quality.