[SR-Users] Network Architecture Question

[Klaus Darilion]

On 03.04.2012 14:15, Rob Watkin wrote:
> Hi,
>
> I am just getting started with Kamailio and have been following the book
> "Building Telephony Systems with OpenSER" by Flavio E. Goncalves. The
> book describes an architecture with a SIP Proxy handling registrations
> and handing calls to a PSTN Gateway. I now have a basic test network
> running where calls are routed via the SIP Proxy (Kamailio) to a third
> party PSTN Gateway. I feel that a better design would be to implement my
> own PSTN Gateway using Kamailio. This single gateway would then handle
> all third party PSTN gateways. Thus one Kamailio server would be facing
> my clients while another would be facing my suppliers.
>
> Is this a sensible architecture and are there any sample configurations
> for Kamailio performing this role?

It depends on what features you need facing the gateway providers. Eg. 
if the gateway provider uses digest authentication then you may run into 
problems with Kamailio. Many people use a B2BUA as "fake" gateway to 
have full control over the call (e.g. Asterisk, sems, sippy)

regards
Klaus