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Communication apparatus for communicating between LANS through a wide area network

  • US 5,506,834 A
  • Filed: 08/01/1994
  • Issued: 04/09/1996
  • Est. Priority Date: 12/01/1993
  • Status: Expired due to Term
First Claim
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1. A communication apparatus for communicating between LANs through a wide area network, comprising:

  • at least one LAN interface portion serving as an interface between a terminal of a LAN and said communication apparatus;

    a plurality of wide area network interface portions, disposed between said LAN interface portion and the wide area network, for demultiplexing data that enter from the LAN interface portion, outputting demultiplexed data on a plurality of transmission lines in the wide area network, multiplexing the data input from the wide area network through a plurality of transmission lines, and sending multiplexed data to be LAN interface portion;

    an amount-of-data identifying portion for identifying the amount of data to be transferred, by referring to data amount information contained in negotiation information which is transferred from a transmission terminal of the LAN to a reception terminal of the LAN via the wide area network at a time of negotiation prior to data transmission; and

    a bandwidth controller for calculating a band which is necessary for communication between the LANs on the basis of said amount of data and determining the number of wide area network interface portions for outputting the demultiplexed data on the transmission lines.

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