1.
What is the difference between an H.323 gateway and a SIP gateway?
2.
What is the difference between an MGCP gateway and a SIP gateway?
3.
When an incoming PSTN call arrives at an H.323 gateway, how does the calling number get normalized to a global E.164 number with + prefix in Cisco Unified Communications Manager?

 
4.
Which statement about Service Advertisement Framework is true?