[Asterisk-Users] New Asterisk bounty: SIP simultaneous

[Andres]

>So isn't this the problem * has? The first client registers as the address
>of record, then the second client comes in with the same registration and
>becomes the address of record? 
>
>  
>
I think you are making this look more complicated than it actually is.  
We do this with our SER Network all the time.  Its called "parallel 
forking".   For example, our subscribers can have 2 or more Sipuras with 
the same number and registration info.  They have one Sipura at the 
office and another at home.  When a call is destined for that sub, SER 
will lookup the location database to see where it should send the 
INVITE.  If it sees 2 or more locations then it sends multiple INVITES, 
ie.. "Parallel Fork".  The first INVITE to answer will be the one that 
establishes the RTP Session and all the others will receive a CANCEL. 

Its quite simple and works perfectly. 

-- 
Andres
Network Admin
http://www.telesip.net