I did a front-end to manage OpenSIPs via web a long time ago, but never published it... gotta look for it.
Looks like the following (pasted pages on top of pages), it's been on production about 4 year, not one restart... of course, low traffic:
Cdrs are not rated, but shouldn't but difficult considering they're already in a table...

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On Tue, Feb 21, 2012 at 2:32 PM, Abid Naseem <bidnaseem@gmail.com> wrote:
Can we integrate opensips and viking?


On 21-Feb-2012, at 4:18 PM, David Villasmil <david.villasmil.work@gmail.com> wrote:

If there's no NAT involved, that's what i'd use... OpenSIPs, not kamailio (in my case)

On Mon, Feb 20, 2012 at 4:45 PM, Abid Naseem <bidnaseem@gmail.com> wrote:
Hi David

Lot of people recommend kamailio for wholesale routing. You think thats better thn freeswitch? 

Thanks,
Abid.



On 20-Feb-2012, at 7:43 PM, David Villasmil <david.villasmil.work@gmail.com> wrote:

Hello Abid,

100,000+  CONCURRENT?

David

On Sun, Feb 19, 2012 at 4:24 PM, Abid Naseem <bidnaseem@gmail.com> wrote:
Hi David!

I am researching on some open source softswitches for a wholesale voip operation (buy and sell routes); Basically I am planning to buy direct routes in bulk and sell to resellers with small requirements.
It would be great help if you can tell me about the following:
  • Number of concurrent calls it can handle (freeswitch + viking)
  • hardware requirements for 100,000+ concurrent calls (with media by-pass)

thanks for your time! keep inspiring.


--
Regards,