How do you find a very cost effective way to do the following:
Connect two local PSTNs via Internet telephony gateways
or create a cyber path to the PSTN (public switched telephone networks i.e. mobile phone) enabling interconnection between the Internet and PSTNs.
Background of technology
http://www.cjmag.co.jp/magazine/issues/1997/nov97/1197internettele.html
"The third type of Internet telephony service - that between two telephones - can be implemented by connecting two local PSTNs via Internet telephony gateways. This application of the technology can offer the caller lower phone rates since it uses the Internet for the long-distance portion of the call.

1 comment… read it below or add one
I have used Skype with some of my code to replace the long-haul with VoIP.
I call into my own Skype with my cell phone, then after entering a password, I can dial an international number, and I do a "SkypeOut", or VoIP to a closest VoIP-to-PSTN gateway in the foreign country, which then is converted to PSTN. Cost is usually less then $0.01 minute.
Cell --> My VoIP Gateway --> VoIP long Haul ---> Skype's VoIP Gateway --> PSTN
If this is a permanent solution you can establish your own VoIP long haul replacement, by putting a VoIP gateway at each permanent location, thereby not have to pay for Skype's VoIP Gateway.