×

Telecommunication network

  • US 5,287,348 A
  • Filed: 08/19/1992
  • Issued: 02/15/1994
  • Est. Priority Date: 08/19/1991
  • Status: Expired due to Fees
First Claim
Patent Images

1. A telecommunication network having a plurality of switching centers composed of ATM exchanges and STM exchanges, the ATM exchanges of said plurality of switching centers operating on the basis of asynchronous through-connection of message packets in standard message cells of fixed length via virtual connections and the STM exchanges of said plurality of switching centers operating on the basis of synchronous circuit-switched through-connection, at least one predetermined ATM exchange of the ATM exchanges being capable of being connected to transmission lines connected to STM exchanges and/or subscriber lines connected to terminal equipment transmitting and receiving STM information in a STM mode, the STM information being in a plurality of time channels, comprising:

  • means for receiving STM information in the plurality of time channels;

    in the predetermined ATM exchange, means for packeting received STM information having a destination of one of an STM exchange or STM terminal equipment in at least one of short message cells and composite message cells, the short message cells being shorter than standard message cells transmitted between ATM exchanges of the plurality of switching centers, each short message cell having at least an information part containing message parts of one of the incoming time channels wherein the STM information is transmitted;

    the composite message cells having the same length as the standard message cells transmitted between ATM exchanges of the plurality of switching centers, each composite message cell having at least an internal cell header and having an information part containing message parts of a plurality of incoming time channels that have a common destination of a switching network output of the predetermined ATM exchange, and means for multiplexing the message parts into the information part of the composite message cells;

    means for interconnecting a plurality of subscriber lines carrying STM information to a multiplex line, the multiplex line being connected to said predetermined ATM exchange, said means for interconnecting having means for packeting STM information received on the subscriber lines in external message cells that have the same length as the standard message cells, each of the external message cells having at least an information part containing message parts of a plurality of time channels in which the STM information is transmitted, and having means for multiplexing the message parts into the information part of the external message cell irrespective of switching network output destinations of the STM information in the plurality of time channels; and

    in the predetermined ATM exchange, converter means connected to said multiplex line for converting said external message cells into one of said short message cells, said composite message cells with multiplexed message parts of time channels having a common destination, and said standard message cells.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×