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Cell phone question

Discussion in 'Misc Electronics' started by burboun supreme, Jan 27, 2010.

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  1. Cellular phone questions:

    Do cellular phones only transmit to the nearest tower, and then at
    point they go down into the underground (buried) land line
    infrastructure... and make the entire journey via the landlines until
    they reach the desired other party?
    For example, if you are in New York and use your cell phone to call
    someone's cell phone in Chicago -- does the signal go from tower to
    landline and back to tower... or does it at some point make part of (or
    most of) the journey via satellite? And is that contingent upon the
    physical distance between the two calling parties?
  2. Not entirely like that.

    The cell phones transmit the signal to the nearest tower, and then at
    that point they go to the cellular phone system network infrastructure.
    Through that infrastructure the call goes to the cellular system
    central office, where it goes to whereever it needs to go
    (other cellular phone through same insfrastructure, to
    normal landline infrastructure, data to Internet etc..).
    The cellular phone system network infrastruture that connects
    the powers together and to cellular phone system central office
    is typically a mixture of copper lines, fiber optic lines,
    wireless microwave links etc..
    I don't think that cellular phone calls would go though satellite normally.

    The call normally would go most of the route though some
    infrastrure in land. Most typically most of the distance
    the call would go in fiber optic link...
    More than the distance the variations would be depending
    if the different call parties are both using same operator
    or different operators. If two callers are in the same city
    and use same operator, the call woul dbe routed to the operator's
    central office equipment only. If the both users use different
    operator, the call would go to operator A central office, then to
    operator's interconnection point (could be in another city) and
    from there to operator B central office and to operato B tower...
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