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Adtran 4205290L4

Adtran MX2800 DS3 DC System - (Redundant 48V DC with Modem - A fully redundant M13 mux that is DC powered and has a built-in V.34 modem for management. Complete with redundant controller cards and DC power supplies.)
Brand Adtran
Model -

The Adtran 4205290L4 is also known as ADN-4205290L4 .