I need to disable all un-necessary protocols on my voice gateway. I have callmanager (6.11) and Cisco IOS voice gateway. I do not use sip or h323 to connect to any other voice gateway. Calls from phones only need to talk to callmanager and voice gateway and calls will go out from PRI on the voice gateway.
I also use SRST in case callmanager fails.
My understanding is that I only need sccp as the protocol for communication between callmanager, voice gateway and phones. So can I disable all H323 and SIP connections to my voice gateway? Callmanager always talk to voice gateway through SCCP. Is this correct? If callmanager fails, all phones will talk sccp to voice gateway. Is this correct? So is there any need for H323 connection in this scenario? If all my calls are going through PRI do I need to enable H323 or SIP connections to the voice gateway at all?
I know that for SRST we need H323. But this is only a service enabled on the router and no h323 connection to the voice gateway is needed. Is this correct?
Any link to any clear document?