Relationship to Other Protocols

#Does SIP do conference control?

#What is the relationship between
MGCP/Megaco/H.GCP and SIP?

#What is SIP+ and how does it
relate to SIP?

#How does SIP compare to H.323?

#Can SIP be used for Internet
telephony gateways (ITGs)?

#Can H.323 and SIP be used
together?

#How do I interconnect Q.931
(ISDN signaling) and SIP?

#How do I interconnect ISUP (SS7
signaling) and SIP?

#What are the different addresses
in SIP?

#How do I put a call on hold?
What is sip-cgi and how does it
relate to CPL?

#Is there a SIP interoperability
certification? How can I test
interoperability with others?