[asterisk-users] Asterisk as a SIP to SIP Gateway

Dovid B asteriskusers at dovid.net
Sat Nov 3 18:09:21 CDT 2007

If you just want all users to register with "Domain A" and call over a single SIP trunk to "Domain B" that would be fairly simple. You have all the phones register on "Domain A" and set that all calls got through trunk X to "Domain B". If you want "Domain B" to call a specific phone connected to "Domain A" then it might be a bit trickier. 
  ----- Original Message ----- 
  From: Tomasz Zieleniewski 
  To: asterisk-users at lists.digium.com 
  Sent: Friday, November 02, 2007 5:25 PM
  Subject: [asterisk-users] Asterisk as a SIP to SIP Gateway


  It is my second time when I try to use asterisk :)
  I am starting with the following issue.
  I want asterisk to behave as a gateway between two sip networks.

  My architecture is the following:

  SIP proxy (registrar - domain A)    ---------------   Asterisk Gateway ------------------------ SIP proxy (registrar - domain B) 
                                                                              (number of UAC registered in domain B)

  Asterisk form the point of view of the domain A and users registered in A is outbound proxy and from the point of view of domain B is a set of SIP clients. 
  Is it possible to configure asterisk in such way that for a particular user from domain A who calls through asterisk 
  the SIP signaling will be passed through some pointed user (asterisk user logged in domain B).
  It is easy to achieve that in the other direction. when there is a connection from domain B to a particular user which was registered
  by asterisk. One can forward such connection to some user registered in sip proxy in domain A. 
  Please point me how can make such a mapping between the calling user from domain A and a user in asterisk who is registered in domain B??

  Thank You in advance.



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