Here was a recent pitch to a Multi-National : you may wish to adopt to your own purposes:
If you can elaborate your interest I should more than happy to provide as service.
For our part, we were the first company to take Open Source Telephony Engines and deliver turnkey products. Increasingly the work is for running large hosted service provider models. The largest so far is 50,000 subscribers for ******. Yes ! Even the phone manufacturers use us !
By the nature of the technology it would be a lot simpler and controlled, never mind cost effective for an organization such as ******* to put in place ‘one large softswitch system’ but with multiple location redundancy to deal with natural disaster & acts of terror.
This of course beckons the question if ‘one’ system can cater for all possible needs of such a diverse organsisation. Any simple declaration of a perfect system is naive. What we have been able to do at Bicom Systems however is provide ‘best-fit’ custom development for the cost of ‘off-the-shelf’. A simple example for NASA was to design a conference facility that permitted the administrator to listen to twenty conference simultaneously while accessing 600 contributors around the world to pull in.
Let me know your interest and doubtless I can contribute further.