Answers in this category:
Does SIP support the standard telephone features?
How does SIP provide message waiting services?
Why does CSeq not have a compact form?
How does the location server communicate with a proxy?
How does SIP support caller ID?
How do I charge/bill for Internet telephony using SIP?
How do prepaid calling cards work in a SIP network?
Does SIP do conference control?
How do I put a call on hold?
How does SIP do "call progress tones" or "ring back"?
Does SIP do admission control?
Does SIP administer bandwidth?
How does SIP support multipoint conferences?
How does SIP support text chat and instant messaging?
Does SIP support video or multimedia conferences?
When do I use a proxy server vs. a redirect server?
How do gateways register with a registrar?