IDENTIFIER TO DETERMINE THE CLASS OF SERVICE TO WHICH A SUBSCRIBER IS ENTITLED

• US 3,555,198 A
• Filed: 04/01/1968
• Issued: 01/12/1971
• Est. Priority Date: 04/01/1968
• Status: Expired due to Term

• Current Assignee: Alcatel-Lucent USA, Inc. (Nokia Corporation)
• Original Assignee: Stepan James Lawrence, Welch John Samuel
• Inventors: STEPAN JAMES LAWRENCE, WELCH JOHN SAMUEL
• Application Number:
  US04/718,318
• Time in Patent Office: 1,016 Days
• US Class Current: 379/243
• CPC Class Codes: H04M 15/08 Metering calls to called party , i.e. B-party charged for the communication
• CPC Class Codes: H04Q 3/0016 Arrangements providing connection between exchanges

Abstract

Identifier circuits are provided for determining which services a calling telephone subscriber is entitled to dial. The identifier circuits also provide identification of the originating central office when more than one central office is serviced by the equipment. Means are provided for routing permitted calls automatically to called parties and for routing unauthorized calls for special screening.

Claims

1. A multiclass identifier for detecting signals indicating the class of service to which a calling subscriber is entitled and for providing the signals to an appropriate circuit, comprising:

a gate circuit connected to receive signals indicative of entitled class of service over input lines from an identification matrix;

said gate circuit providing outputs to a detector circuit independently of the subscriber'"'"''"'"'s directory number;

the detector circuit routing a further output indicative of the class of service to which a caller is entitled; and

a director circuit responsive to said further output to provide an indication of class of service to a signal transmitting circuit and to a control circuit.

2. A multiclass identifier as claimed in claim 1, in which the gate circuit includes a transistor coupled in a normally nonconductive state to a sequencer, to a plurality of thousands busses and to the detector circuit.

3. A multiclass identifier as claimed in claim 2, in which the base circuit of the transistor includes means for receiving gate signals from the sequencer to make the transistor conductive, said transistor thereby permitting transmission of signals indicative of entitlement from the thousands busses to the detector.

4. A multiclass identifier as claimed in claim 1, in which the director circuit includes a plurality of switching means responsive to said outputs to close selected contacts and connect said thousands digit gates to the cOntrol circuit.

5. A multiclass identifier as claimed in claim 1, in which the director circuit includes a plurality of switching means responsive to said further outputs from the detector circuit to close selected contacts and connect class of service signals to the control circuit.