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What is the difference between FDMA, TDMA and CDMA? Could you give me an example?
I live in a "developing" nation and there is a good market for VoIP termination to the local cellular networks. I have dedicated bandwidth (frame relay) to bring traffic in, a couple of Quintum AX4800 Tenor-S gateways with patch boards, but need to acquire some good GSM channel banks to complete...
What is the technology that would allow a call from a cell phone to be routed to a transmission device that triggers a loud beeping sound. For example, using a cell phone to call a number that calls a database, and then triggers an external receiver that is attached to one's keychain for example?