transmission equipment FDSLIII (Fractional Digital Subscriber Line)

Reached distance: up to 5km(0.4mm) in case of line 4 type, without
   repeaters.
Various test and self-diagnosis function through Loopback and TPG
  - LLB, DLB, RDLB, ALB, L1, L2, L3, D1, D2, TPG (2047 pattern)
Uses dual intensive power with dual usage of AC/DC
Remote control function to change the status of the device setup at the
   COT.
Effective network configuration with E1/T1 multiplexing or de-multiplexing
   function
  - Insert up to 4 units of E1