Hey Yuantao,
> *From:* [EMAIL PROTECTED] [mailto: > [EMAIL PROTECTED] *On Behalf Of *Yuantao Zhang > *Sent:* Wednesday, June 04, 2008 12:10 > *To:* [email protected]; [EMAIL PROTECTED] > *Subject:* [SIPForum-discussion] What is the port number in "Invite" > request-line? Thanks > > Dear all > > INVITE sip:[EMAIL PROTECTED] <[EMAIL PROTECTED]> SIP/2.0:5555 > > INVITE sip:[EMAIL PROTECTED] <[EMAIL PROTECTED]> SIP/2.0 > > Above are 2 "Invite" request-line examples. In example one, it indicates a > port number, 5555. What does the port number mean? Is it the port number > of SIP proxy? > As you suspected yourself and as Shmulik pointed correctly, the number 555 indicates the port number of the running SIP Proxy which the UA is registered to. > Why we include port number here? The SIP proxy(biloxi.com) application > layer who receives > Simply because this is a non-standard SIP port, just as if a web server was running on port 8081 you would have to explicitly tell the browser to use that port, for example: http://www.non-standard-server.com:8081 This is also required when more than one SIP Proxy is involved in the process and the INVITE travels from one proxy to another. The second "Invite" request-line example is from RFC3261 and does not > include port number. Can I say the port number is useless? So why example > one includes a useless part in "Invite" request-line URL? > To be more precise the first invite message (INVITE sip:[EMAIL PROTECTED]<[EMAIL PROTECTED]>SIP/2.0:5555) is wrong. It should have been INVITE sip:[EMAIL PROTECTED]:5555 SIP/2.0 > Any standard on this port number issue? Thanks. > It is very common for different SIP stacks to behave somewhat differently and quite a few of them do not comply with the RFC which is very unfortunate. -- -- Regards, *Liran Tal **Unix Kernel Developer NGN Solutions, TELES Israel * [image: [Teles Logo]] Phone +972 4 9092592 Fax +972 4 9597144 Mobile +972 52 3793446
_______________________________________________ Sip mailing list https://www.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use [EMAIL PROTECTED] for questions on current sip Use [EMAIL PROTECTED] for new developments on the application of sip
