Network call control system

• US 6,665,394 B1
• Filed: 09/16/1999
• Issued: 12/16/2003
• Est. Priority Date: 12/16/1998
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Muraoka, Kazuhiro, Yonehara, Akio, Tokunaga, Seiji, Nishimoto, Norihito
• Primary Examiner(s): TIEU, BENNY QUOC
• Application Number:
  US09/397,200
• Time in Patent Office: 1,552 Days
• Field of Search: 379/219, 379/220.01, 379/225, 379/229, 379/230, 379/221.15, 370/351, 370/410
• US Class Current: 379/220.01
• CPC Class Codes: H04Q 3/0037 involving call modelling techniques, e.g. modifications to the basic call state model [BCSM]

Abstract

A network includes a plurality of exchanges and a service station which carries out network services. Each exchange of the plurality of exchanges and the service station are connected through a call control signal line. Respective exchanges of the plurality of exchanges are connected through circuits. Each exchange of the plurality of exchanges includes a virtual-index capture processing portion which captures a virtual circuit identification index, and the exchange specifies the virtual circuit identification index and makes a call-out request to the service station.

Claims

1. A network call control system in which a network comprises a plurality of exchanges, each exchange of said plurality of exchanges and a service station, which carries out network services, being connected through a call control signal line, and the respective exchanges of said plurality of exchanges being connected through circuits,

wherein:

each exchange of said plurality of exchanges comprises a virtual-index capture processing portion which captures a virtual circuit identification index; and

said exchange specifies the virtual circuit identification index and makes a call-out request to said service station.

2. The network call control system as claimed in claim 1, wherein each exchange of said plurality of exchanges comprises a replacement processing portion which receives a response signal sent from an opposite station in response to the call-out request, and replaces the virtual circuit identification index with an actual circuit identification index.

3. The network call control system as claimed in claim 1, wherein:

said service station comprises an intra-network inter-station management portion which manages the circuit identification indexes between the respective exchanges of said plurality of exchanges; and

said service station receives the call-out request and captures the actual circuit identification index.

4. The network call control system as claimed in claim 1, wherein said service station comprises an intra-network calling-condition management portion which manages a calling condition for each dial number.

5. The network call control system as claimed in claim 2, wherein each exchange of said plurality of exchanges comprises a service-information setting processing portion which adds service identification information to the virtual circuit identification index in accordance with a result of analysis of a dial number.

6. The network call control system as claimed in claim 1, wherein said service station comprises a service determination processing portion which determines, from service identification information added to the virtual circuit identification index, the service to be carried out.