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Difference between DXX & ADM

Can anybody tell the difference between Digital Cross Connect (DXX) and Add/Drop Multiplexer?

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Re: Difference between DXX & ADM

DXX is basically used in multiplexing digital channels like T1 or E1 . ADM is used in ATM to multiplex between channels. These are two options in carrier signalling , SDH and SONET.

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