Re: [Sip-implementors] Query regarding Early-session(RFC-3959)

2009-01-21 Thread Paul Kyzivat
A A ANEES-RJD876 wrote: All As part of implementing RFC 3959 (early session) I am trying to understand what interactions this feature has with preconditions as described in RFC 3312. RFC just mentions and provides a reference to RFC 3312 but does not provide any details. I

[Sip-implementors] user=phone usage in SIP trunking gateways

2009-01-21 Thread Andrea Rizzi
I'm coming back to an old question as it appears to me RFCs says differently about. Quoting an old answers from Paul: If user=phone is present, then the syntax of the user part must conform with the TEL URI syntax as defined in RFC 3966. That syntax says that the number must start

Re: [Sip-implementors] user=phone usage in SIP trunking gateways

2009-01-21 Thread Paul Kyzivat
Andrea Rizzi wrote: On the other hand, RFC3966, Section 12 says: When the '+' sign is not present, but a telephone number is represented by the user portion of the URI, the SIP URI SHOULD contain the optional ';user=phone' parameter; e.g., To: sip:83...@sip.example.net;user=phone

Re: [Sip-implementors] user=phone usage in SIP trunking gateways

2009-01-21 Thread Paul Kyzivat
Andrea Rizzi wrote: Sorry, I reported the wrong RFC number, the right one is 3398 SIP-ISUP mapping. I beg your pardon OK. That is also old - it predates 3966 by a couple of years, but it was incorrect even with respect to RFC 2806, which it referenced for the definition of the tel URL

Re: [Sip-implementors] ad hoc conferences with SIP

2009-01-21 Thread Stefan Sayer
Hello, o Dale Worley [01/20/09 21:50]: (2) The SIP standards tend to define *mechanisms* that are utilized to implement features -- E.g., a phone executes a blind transfer by sending a REFER to the remote phone. So one UA will be the one that you can find more about transfer mechanisms in