Yes, assuming that your B2B does not also host registrations, it would 
modify the SIP message accordingly and forward it to the next hop (which 
may be another proxy, or the intended registrar)

regds
arjun

--
Arjun Roychowdhury @ Hughes Software Systems
11717 Exploration Lane, Germantown MD 20876
(O): 301 212 7860 




"Patrick Lam" <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED]
07/15/2003 06:38 AM

 
        To:     <[EMAIL PROTECTED]>
        cc: 
        Subject:        [Sip-implementors] How does a B2BUA handle REGISTER messages?


Dear all:
 
When a B2BUA is used as an ALG (to deal the firewall/NAT), how would it 
handle REGISTER?  Would it "proxy" the REGISTER for the sending UA? 
 
What I am thinking is to add a "Via" header and then forward it to the 
proxy server.  When the 200OK returns, the B2BUA will just relay the 
response back to the sending UA.  Does this make sense?
 
Thanks.
 
Patrick_______________________________________________
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