[SR-Users] openSIPS vs Kamailio vs SIP-Router

[Henning Westerholt]

On Monday 15 August 2011, Nick Khamis wrote:
> [..]
> Alex: Nice documentation based on Kamailio! If we choose this product
> it will be a perfect reference point.

Hi Nick,

was the response from Alex also on the list? I somehow missed it.

> [..]
> In terms of Sip Router vs. Kamailio, is it safe to say the former is a 
> subset of the other? I.e., both function on the same core that provide SIP 
> trunking, proxy and termination services, and Kamailio contains additional 
> features such as B2B etc...?

Both are actually the same codebase, the only difference is in packaging, some
defines and daemon/script names etc.. http://sip-router.org/releases/
But its the other way round, kamailio is a subset of sip-router.
 
> In terms of clustering, high availability, and more importantly load
> balancing, what is offered across the board. In terms of "made to
> scale" this is extremely important to us.

Especially if you look to TCP and TLS there were extensive optimizations and
refactorings recently done, e.g. have a look to this benchmark:
http://www.kamailio.org/w/2011/05/green-voip-energy-efficiency-and-performaces-of-v3-0/

With regards to the "build to scale", for example in our backend we use
Kamailio to operate services for more than 3 million customers and more than
1 billion minutes/month, so scaling and performance are of course really
important for us. Daniel will present in two weeks at the 10 year SER event in
Berlin some more interesting usage statistics, I think.

Best regards,

Henning