[SIPForum-discussion] How to know whether anonymous INVITE is recieved from B2BUA user or other external user

[Vivek Batra]

Hi,
In B2BUA, if anonymous INVITE is recieved from one of the registered user,
how B2BUA can become to know whether INVITE is recieved from its user or
some other external user.
To elaborate, let us taken an example:

*	User alice at abc.com is registered with B2BUA (abc.com).
*	B2BUA itself is registered with some other domain let say xyz.com.
*	B2BUA can recieve the INVITE from:

*	It's registered user viz Alice or other one.
*	External users (xyz.com) which are not registered with B2BUA instead
B2BUA is registered with doamin xyz.com

*	B2BUA applies different call routing mechanims in both the cases viz
when INVITE is recieved from its registered users or when INVITE is recieved
from exteranl users. E.g., B2BUA doesn't authenticate the INVITE recieved
from exteranl user while may/ may not authenticate the INVITE recieved from
its registered user. 
*	Now if Alice sends the anonymous INVITE to B2BUA, how B2BUA become
to know whether INVITE is recieved from Alice or some other user. B2BUA
needs to know this since call routing mechanim for each system user is
different. For E.g., Class of Serive, Time-Zone etc (from IPPBX point of
view).

Best Regards,
Vivek Batra 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sipforum.org/pipermail/discussion/attachments/20090306/7299e012/attachment-0002.html>