1. How can a Windows Phone handheld connect to other handhelds not loaded with Windows Phone?
2. Explain each of the following.
(a) Session Announcement Protocol
(b) Session Description Protocol
(c) H.248
(d) SCTP
(e) SIP to SIP call flow
(f) SIP to PSTN call flow
(g) PTN to IP call flow
(h) Mobile VoIP