alok khemka wrote:
> hi i was going through the papers written for sip and was confused about
> the sip url. basically when we say like sip:[EMAIL PROTECTED] here a.b.com is
> the machine name over which alok is logged or it's the domain name of
> the network of which the user is part of. like my machine name is
> kc.umkc.edu and my network domain is umkc.edu. so my address is
> sip:[EMAIL PROTECTED] or sip:[EMAIL PROTECTED]???
Alok:
For an analogy, look at how email works. When someone sends you email,
they will simply send it to [EMAIL PROTECTED] Your email, when it gets
to the umkc.edu domain may actually go to a mail server called
email.cs.umkc.edu from where you retrieve it using POP3 or IMAP or any
other MUA.
SIP works the same way. Just like in email, you have a URI
([EMAIL PROTECTED]). Anyone wanting to send you an invitation uses that
URI in the To field and the R-URI of the INVITE. The SIP proxy mesh
routes the invitation to umkc.edu domain, where a proxy looks up your
current registration and forwards the INVITE there. Unlike email,
however, SIP name-to-location bindings are not static. SIP supports the
REGISTER method for registering your current location with umkc.edu's
registrar. Thus you may move around the campus, but so long as your UA
registers with the registrar, you will get the invitation wherever you
happen to be.
Regards,
- vijay
--
Vijay K. Gurbani vkg@{lucent.com,research.bell-labs.com,acm.org}
Internet Software and eServices Group
Lucent Technologies/Bell Labs Innovations, 2000 Lucent Lane, Rm 6G-440
Naperville, Illinois 60566 Voice: +1 630 224 0216 Fax: +1 630 713 0184
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