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When you call in to order service, your sales rep checks a "tool" they have which does a loop pre-qualification, all it really checks is that your CO is "built" for ADSL (does it actually have an ASAM in it? Is it actually wired to the MDF in your CO?) and that your physical loop length is within the proscribed limits for the service (under 15K feet) - in most cases, the test that they're reading from can't tell if you're on a fiber circuit or a multiplexed circuit - and they almost never catch fiber to the curb or in the loop (because these are not Engineering databases that they're pulling this info from - this is for sales!). In reality, your physical loop could have all sorts of DSL-preventing "features" on it - in spite of the sales rep (or web-based) loop qualification... load coils, multiplexed lines (DAML), bridged taps, fiber in the circuit, etc. - which won't come out in the wash until someone from the phone company actually "looks" at your circuit.
FAQ by kadar
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