Hi,
I can offer you the following switches
iTel , A2billing , VOS3000 , with full support which contains configuration , technical support and training as well as I can offer you full security services to protect your voice system from hacking , I have quite good experience in voice security , I can also provide you lot of new ways to enhance your system ..
I am working in telecommunication sector from last 8 years , currently providing Voice/Network consultancy to one of VoIP company in based in london, UK .
I have worked with voip switches like Mera-II, VoIPSwitch, Star2Billing, Digitalk ,VOS3000, PortaOne , A2billing , NexTone , Squire Billing .. Moreover I can configure SS7/PRI/GSM gateways to make your business more profitable and can give lot of new ideas to grow your business in new direction
Looking forward to hear from you