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Telecommunications network

  • US 5,923,659 A
  • Filed: 09/20/1996
  • Issued: 07/13/1999
  • Est. Priority Date: 09/20/1996
  • Status: Expired due to Term
First Claim
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1. A telecommunications system, comprising:

  • a first switched telecommunications network comprising;

    first program controlled switching systems serving first customer terminals connected by local links to the first program controlled switching systems, first trunks interconnecting the first program controlled switching systems for carrying interoffice communications to and from customer terminals, and a first common channel signaling system interconnecting the first program controlled switching systems for carrying call set-up signaling protocol messages for control of selective establishment of call connections to or from the first customer terminals via the first trunks;

    a second switched telecommunications network comprising;

    second program controlled switching systems serving second customer terminals connected by local links to the second program controlled switching systems, second trunks interconnecting the second program controlled switching systems for carrying interoffice communications to and from customer terminals, and a second common channel signaling system interconnecting the second program controlled switching systems for carrying call set-up protocol signaling messages for controlling selective establishment of call connections to or from the second customer terminals via the second trunks;

    an open-access, non-proprietary internetwork connecting spaced dissimilar networks and using transmission control protocol/internet protocol (TCP/IP) to link the dissimilar networks;

    a first interface having routing capabilities, coupled to the first common channel signaling system and the internetwork, for communicating call set-up protocol signaling messages to and from the first common channel signaling system over the internetwork in TCP/IP; and

    a second interface having routing capabilities, coupled to the second common channel signaling system and the internetwork, for communicating call set-up protocol signaling messages to and from the second common channel signaling system over the internetwork in TCP/IP, whereinthe first and second interfaces enable exchange of call set-up signaling protocol messages over the internetwork between the first and second common channel signaling systems, to enable selective establishment of a communication connection between a first customer terminal in one of the switched communications networks and a second customer terminal in the other of the switched telecommunications networks at least partially over trunks.

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