Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent
1997-02-21
1998-08-18
Hunter, Daniel S.
Telephonic communications
Supervisory or control line signaling
Using line or loop condition detection
379382, 379355, 370904, 370264, H04M 156
Patent
active
057968160
DESCRIPTION:
BRIEF SUMMARY
CROSS-REFERENCES TO RELATED APPLICATIONS
This application is a U.S. national phase counterpart of international application Ser. No. PCT/JP96/01758 filed Jun. 25, 1996 which claims priority to Japanese application Ser. No. 7-158958 filed Jun. 26, 1995.
TECHNICAL FIELD
The present invention relates to a cleaning system for a telephone number list in a customer list and so forth to be used in telemarketing and the like, for deleting null telephone numbers from the telephone number list using such an apparatus as a personal computer.
BACKGROUND ART
In various businesses utilizing a telephone, a telephone number list of customers is quite important information and thus has to be maintained frequently for deleting telephone numbers which have become unnecessary from the list to prevent degradation of the value of the contained information. The customer information in such lists naturally contains variable information. Namely, the telephone number of the customer may be varied due to termination of use of the registered telephone number, changing to other telephone number, and can be null because of original registration of a wrong number. Such null telephone numbers have to be deleted from the list or to be replaced with correct or new telephone numbers.
Conventionally, maintenance of a customer list has been performed upon giving a phone call to respective customers according to the telephone number list through certain business transactions. Namely, deletion or updating of the null telephone numbers has been done with verifying response from respective customers.
The conventional cleaning method for deleting and updating a telephone number list associating with business inherently may cause significant waste or irrationality in certain type of businesses. Namely, since it is not avoidable to make a phone call to the customers having null telephone numbers which should be deleted from the list, extra expense may be wasted or people who are not customers can be disturbed. On the other hand, for the customers who have moved to other addresses, it is possible to redundantly phone the old and the new numbers to cause waste both in time and cost.
DISCLOSURE OF THE INVENTION
It is an object of the present invention to provide a cleaning method for a telephone number list and a system therefor, which can automatically and efficiently perform a process of deleting null telephone numbers using a personal computer or the like, without making phone calls on actual business basis.
The present invention utilizes advanced bearer services provided by an ISDN integrally connected with the existing public telephone network to process cleaning of a telephone number list accurately and quickly. Namely, a cleaning method for a telephone number list and a system therefor according to the present invention, including an apparatus such as a personal computer, comprises each of the following elements (1)-(5).
(1) The system is connected with an ISDN to process circuit-switched call control procedures defined in the ITU-T recommendation Q.931 as a calling terminal.
(2) A telephone number is retrieved sequentially from a telephone number list to be cleaned as a called party number to send a SETUP message including an unrestricted or a restricted digital information in a "bearer capability" information element to the network.
(3) When the network receives the SETUP message sent and transfers an "alerting" or "connect" message, the system immediately sends a "disconnect" message to the network to perform a disconnect and release sequence and determine the called party number in the SETUP message effective.
(4) When the network does not receive the SETUP message sent and transfers a "disconnect" message, the system immediately performs a disconnect and release sequence and obtains a cause display in an information element of the "disconnect" message from the network to determine the called party number in the SETUP message either effective or null according to the cause display.
(5) A new telephone number list is generated, whic
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patent: 5075894 (1991-12-01), Iwase et al.
patent: 5259026 (1993-11-01), Johnson
patent: 5309505 (1994-05-01), Szlam et al.
patent: 5371787 (1994-12-01), Hamilton
patent: 5483586 (1996-01-01), Sussman
Mechanism To Automate Updating Obsolete Telephone Numbers, Apr. 1994, 115 vol. 37, No. 4A IBM Technical Disclosure Bulletin.
Hunter Daniel S.
Jintec Corporation
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