COMMON CONTROL TELEPHONE SWITCHING SYSTEM EMPLOYING ADDED DATA WIRE

• US 3,660,612 A
• Filed: 06/29/1970
• Issued: 05/02/1972
• Est. Priority Date: 05/11/1966
• Status: Expired due to Term

• Current Assignee: Alcatel SA (Nokia Corporation)
• Original Assignee: Heinz Schluter, Hilmar Schonemeyer
• Inventors: Schluter, Heinz, Schonemeyer, Hilmar
• Primary Examiner(s): Claffy, Kathleen H.
• Assistant Examiner(s): Brown, Thomas W.
• Application Number:
  US05/056,088
• Time in Patent Office: 673 Days
• Field of Search: 179/18D,27DA,18FH
• US Class Current: 379/245
• CPC Class Codes: H04Q 3/54 in which the logic circuitry controlling the exchange is centralised

Abstract

Subscriber circuits and junctors are interconnected through data wires via a switching network. In addition to the normal speech wires from the subscriber lines, a separate data wire is provided. This added data transmission wire is used to transmit information through a data wire connection within the network. The data wires receive identifying pulses from a central control through connecting facilities. The data wires are connected to a common information channel via translators. All data concerning an identified connection, as e.g. subscriber number, class-ofservice, position number or addresses of the participating switching multiples and the type and number of the junctor are made available over the common information channel to the central control facilities for evaluation.

Claims

1. An arrangement for transmitting items of supervisory and call control information in a telephone system having a switching network controlled from a central control circuit, a plurality of telephone stations within said system, a plurality of speech wires connecting each of said stations to said network, the invention comprising a data wire connecting each of said stations to said network, means for extending a data wire connection from a station included in setting up a call through said network for carrying information items within said network, means extending said data wire connection from the network to the central control circuit, means in said central control circuit responsive to the extension of said connection for applying identifying pulses over said data wire, means coupled to said data wire connection and individually responsive to applied pulses for supplying information to a common information channel directed to said central control circuit, and evaluating means connected to receive information from said common information channel for processing said information items.

2. The arrangement as claimed in claim 1, wherein supplying means comprise a plurality of translators, each adapted to provide an item of call control information for transmission through said network and control circuit.

3. The arrangement as claimed in claim 2, wherein said pulse applying means comprises a pulse distribution means for controlling access to said translators in sequence.