[asterisk-users] Confederated SIP service.

[Simon Donnyme]

'lo,

A provider sets up an Asterisk box in order to service the needs of a small
number of customers.  The provider issues SIP handsets and the users
register with sip.telco.com

Thanks to the selection of a brilliant family of technologies, including SIP
and Asterisk, the telco.com company grows and grows.  Eventually, beyond the
point that they can really hold all of the customer SIP registrations on one
server.  So, to improve scalability and redundancy, the provider installs
four Asterisk servers to handle registrations.

In a one server SIP environment, the dialplan is easy to setup

exten => 1234,1,Dial(SIP/user1234,20,r)

.. and if user1234 is registered, user1234 is dialed.  But what about this
multi-server environment?  If the same extensions.conf line appears on all
four asterisk servers, but the user is only registered to sip2.telco.com,
how can the administrator make a Dial(SIP/user1234,20,r) on
sip3.telco.comgo to the right user?

Does a type of 'confederated sip registrations' system exist in Asterisk 1.4
?

Best regards,
SJJD
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