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I have Observed that normally we have E1 a/b/c matched to Serial interface like serial4/a/b,I have a cofusion that how and why this is done, if we have E1 card on router we can do straight away..
thanx jack, but how serial interface is mapped/matched to the E1 controller.Like Router A E1 1/0/6 -- SERIAL1/0/6:0and why is it necessary if we have E1 card.
