calling card, ipbx, ip centrex, voip solution to implement through a softswitch to build and install

Hello In order to start a voip business, I would like to build a softswitch (dedicated server) to provide following services: - Calling cards - Ipbx - call back (pin/pinless) - IP Centrex Different calling plans, rates, Voip providers should be setup and configured IVR for calling card (french, english, arabic), ipbx and Ip centrex should be created, configured and integrate into the business solution Following softs will be used: - Asterisk - A2Billing Documentation could be written for explanation and for well understanding technical tools and ressources. I look forward to hearing from you with requirements and details realization. Albert The Administrator removed this message due to contact details which breaches our Terms and Conditions.