Can I use module vwic2-1mft-g703 for ISDN PRI?

I am Upgrading from 3.3 to 4.2...When I upgrade from 3.3.4 to 4.1, 4.1 is not working.No error during the install, but when I try to start csadmin (net start csadmin) I have this error"The CSadmin service could not be started. error 3523"I tried exac...

Some of my users encounter echo problem and one way audio conversation when using their phone. I have enable echo cancellation in the CME.May I know what could be the cause of problem?

I observed when i perform 100 ping from my switch to ip phone, i will observe intermittent packet drop but this does not happen when i ping from a workstation to the ip phone. Is this normal or any misconfiguration in my switch?Below is the config fo...