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  1. chingkui

    What is "bearer service"? Why is this term used (or chosen)?

    I have been reading a lot in telecommunication, I find it very difficult to understand some of the terms. One of them is "bearer service", what is it exactly? Is there a (meaningful, understandable) definition of it? Why do people choose the word "bearer" to describe this "service"? Thanks.
  2. chingkui

    Does call between GSM users go through PSTN?

    Hi, I was told that GSM is an access network, does this mean that any call between two GSM users of the same network has to go through PSTN (or some other networks external to GSM)? Does that depend on the location of the two GSM subscribers? What if they are in the same cell (or same location...

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