The FCD-1L is a single port access unit for T1 or Fractional T1 services. User data is placed into a T1 frame, using only the required number of timeslots. DSU III AR - All Rate DSU/CSU for 4-wire Dedicated DDS or Switched 56K applications with Secondary channel. LCD display for configuration and status; V.35 and EIA-232 DTE connections; V.25 bis Dialing.
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