[Kamailio-Users] use case for settlement free peering

[Daniel-Constantin Mierla]

Hello,

On 19.10.2009 20:18 Uhr, A G wrote:
> Greetings:
>
> I'm looking for advice on a project/proof of concept I'm working on.
> I would like to create a settlement-free peering fabric for voice
> traffic between and among some peer institutions in my area.  Because
> this is more of a side-project for cost cutting measure, I'm primarily
> looking at open source software, though commercial product
> recommendations would be helpful as well.
>
> The organizations I would like to connect have their own PBXs with
> large blocks of numbers (whole NPA-NXXs), with no number portability
> in or out.  I imagine both at the individual PBXs and peering fabric,
> the number routing would be static.  To put another way, we would
> manually configure which connections the block of telephone numbers is
> reachable at.
>
> Here is the required ASCII art diagram   :)
>
>
>                     +-------+
>                     |  PBX  |
>                     +-------+
>                         |
>                     +-------+
>                     |  SBC  |
>                     +-------+
>                         |
>                         |
> +---+  +---+         .--------.            +---+  +---+
> | P |  | S |        /          \           | S |  | P |
> | B |--| B |------ (     ????   )----------| B |--| B |
> | X |  | C |        \          /           | C |  | X |
> +---+  +---+        `---------'            +---+  +---+
>                         |
>                         |
>                     +-------+
>                     |  SBC  |
>                     +-------+
>                         |
>                     +-------+
>                     |  PBX  |
>                     +-------+
>
>
>
>
> For scalability reasons, a full mesh of connections between and among
> the SBCs is not an attractive option.
>
> Here's what I think I need:
> Basic SIP routing
> TCP, TLS, and UDP support
>
> What would be nice to have:
> IPv6
> CDR
>
> What is probably not needed:
> User agent client registration, presence, IM, voice mail
>
> I see there are several different open source voice projects.
> Do you think this is an appropriate use for Kamailio?
>   

Kamailio can be used in such scenario. It has a lot of features to help 
you routing calls -- see modules such as lcr, carrierroute, dialplan.

If you do heavy tls/tcp, then upcoming Kamailio 3.0 will have lot of 
improvements in this areas. IPv6 is supported as well for core routing. 
You can generate CDRs using acc module and some stored procedures -- see 
for example:
http://siremis.asipto.com/install-accounting/

Cheers,
Daniel

> I'm seeking comments on what you would use for this situation.
> Are there any existing  projects along these lines?
> Is there one project that is better than another for this application?
>
>   

-- 
Daniel-Constantin Mierla
* Kamailio SIP Masterclass, Nov 9-13, 2009, Berlin
* http://www.asipto.com/index.php/sip-router-masterclass/