[Sip-implementors] Registration doubt in SIP.

2015-12-30 Thread Karthik.v
Hi , if contact header is optional in REGISTER request then, multiple TO header can be sent to register multiple contact ? As per my knowledge, To header should not be multiple then why it has been said in RFC 3261 that contact header is optional in Register. Tha

Re: [Sip-implementors] SIP

2015-12-30 Thread Karthik.v
Hi Dale, Thanks for your response. 1) You meant to say that Registration is creating a dialog (dialog-id) but there is no reason for using it. Am I correct ? 2) No more thing is here, can u explain me the logical reason behind "The Contact header field MUST contain exactly one SIP o

Re: [Sip-implementors] Some Queries(Doubts) in SIP

2015-12-30 Thread Dale R. Worley
"Karthik.v" writes: > 1) Please state a real time scenario where multiple contact headers will be > present in a REGISTER request ? The most likely use is when a UA knows only its IP address and not any DNS name for that address. Then if it wants to register both an IPv4 address and an IPv6 addr

Re: [Sip-implementors] Some Queries(Doubts) in SIP

2015-12-30 Thread Paul Kyzivat
On 12/30/15 5:17 AM, Vivek Batra wrote: 3. Since it is optional and not sent in the REGISTER request, I would like to see registrar to simply return the present bindings. However not surprise for me if it's been rejected with 400 Bad Request and can be seen in many practical implementations. I

Re: [Sip-implementors] Some Queries(Doubts) in SIP

2015-12-30 Thread Paul Kyzivat
On 12/30/15 1:32 AM, Karthik.v wrote: Hi all, I have some list of queries on sip , It sounds like you are just getting started with sip. If you haven't already, you would do well to read one or more of the introductory books. 1) Please state a real time scenario where multiple co

Re: [Sip-implementors] Some Queries(Doubts) in SIP

2015-12-30 Thread Vivek Batra
Hi, 1. Please note that SIP is not limited to telephony application. For instance, user tries to register SIP address, mail address and phone number as a contact address in one REGISTER message. In addition, it can not be used to register multiple devices, only multiple identities of one device.