On Wed, 2009-10-28 at 09:40 -0400, Tony Graziano wrote:
> I am testing some functionality with sipXbridge. I am curious if ISN
> dialing is supported via sipXbridge. 
> 
> What I think I know:
> 
> Internet calling does not need to be enabled if using sipXbridge, it
> does it natively.
> sipXbridge does ITSP trunking 
> sipXbridge supports remote workers (Nat traversal, via media relay)
> 
> Since there is no dial plan for ISN, and you can natively enable it
> via registrar, what does one need in place to support ISN lookup and
> dialing. I assume it would be an independent SBC.
> 
> Am I correct?

Not quite.

> Internet calling does not need to be enabled if using sipXbridge, it
> does it natively.

The Internet Calling checkbox controls whether or not you can route to
an arbitrary SIP URL somewhere on the internet.  Since that's what ISN
dialing provides a telephone-keypad way to do, you do need to enable
Internet Calling.

> sipXbridge does ITSP trunking 

True, but it can also be used to route to unconfigured targets if you
enable Internet Calling.

> sipXbridge supports remote workers (Nat traversal, via media relay)

Nope - remote workers connect directly to the sipXproxy.  The media
relay is shared between the bridge and the proxy.

ISN dialing (see http://freenum.org/) provides a way for the registrar
to translate a dial string like 123*5678 into a sip url
[email protected].  The actual routing of the request is then done
using normal SIP rules.  If you're not putting your sipXecs system
directly on the public Internet, then you need to route the call through
an SBC to allow the traffic in and out.  You can use sipXbridge as that
SBC.



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