Optical accommodation

Optical accommodation(ひ temporary palpus う way), analog telephone line N-ISDN, analog low-speed digital private line and the like, with the remote multiplex subscriber's line transmission device and the like optical cable. General,FTTx compared to terminal is slow.

It is introduced following kind of thing as purpose.

  • communication line length is long.
  • New construction multiple dwelling house.
  • At the area which demand is intensive underground piping.
  • railroad railroad track・ special high pressure transmission of electricity line.

2000 age, twisted pair cable communication line is stopped, the optical accommodation circuit furthermore is thought the thing which increases.

Constitution

  • RT (Remote Terminal) remote multiplex subscriber's line transmission device: D70 digital switchboard those which accommodate the subscriber's loop remotely.
  • RSBM (Remote SuBscriber Module) remote member accommodation module: New node system (multimedia handling node) subscriber's loop accommodation device. ADM (Add Drop Multiplexer) those which transmit the circuit which with the divergence multiplexer with one optical cable ring is accommodated in plural RSBM multiplex are many.
    • Indoor installation for RSBM-S (RSBM- Satellite building) remote station: For replacing the small-sized switchboard plural there is many also a thing which is installed in one bureau building.
    • RSBM-F (RSBM-Feeder Point) installation on feeder point site: For optical cable conversion of underground part underground pipe conduit is installed in the drawer point to the ground. In order to be installation possible on the sidewalk, it is miniaturized. public telephone box also those which are unified exist.
    • RSBM-U (RSBM-User building) member main distributing frame: multiple dwelling house・ office building and the like building. direct taking in telephone.
  • π System: utility pole, is closer to the member. Concerning one the metal circuit of 10 circuits it is accommodation possible, it is introduced at part area of the city center.

Cost distribution problem

fixing telephone・ private line and the like, there is argument in cost distribution in regard to accounting processing. In addition, there is argument concerning whether maintaining the cost at basic fee, whether telephone call fee and it maintains at utilization fee of the other enterprise.

In addition, communication protocolSDH・ATM, cost is high,IP net conversion.

Related item

  • main distributing frame
  • ADSL : Introduction and the like with optical accommodation circuit
  • telephone network
  • communication line
 

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