You can configure anonymous call rejection on cucm to block calls from anonymous callers at the SIP ...

Is your packetization greater than 80 bytes on the router. If yes try setting codec packetization to...

HI Mohammed,Can you please let know what kinf od sound are you hearing. Is it a crackling sound or a...

Bulk edit of speed dial can be accomplished by exporting all the phone details and then re-inserting...

Hi,It seems the phone is not responding to the Call control system. I am pretty sure that this is ha...

Can you try to make numbering type in call leg for called party to match the numbering type for outg...

If this issue is not resolved, can you please capture trace of a failed call and send it to abbhowmi...