Telephonic communications – Call or terminal access alarm or control – At switching center
Patent
1996-12-23
1999-09-21
Hong, Harry S.
Telephonic communications
Call or terminal access alarm or control
At switching center
379196, 379137, H04M 300, H04M 1500
Patent
active
059563931
ABSTRACT:
The present invention relates to a system and a method for limiting call velocity attempts in the public switched telephone network. A central office of the network is provided with a program element that examines all the physical channels from respective customer premises equipments (CPE). The program element counts the number of times each CPE goes off-hook within a given period of time. This condition is interpreted as an attempt to establish a call through the telephone network. If the number of attempts exceeds a threshold, the physical channel is de-activated for a predetermined time period. De-activation means that call establishment over that channel is negated for all possible destinations. This can be implemented by preventing establishment of dial tone. In a variant, selective de-activation is effected. More specifically, the program element in the central office examines the digits dialed at the CPE and authorizes call establishment only when certain specific destinations are attempted to be reached, such as emergency services (9-1-1 calls, for example). For all other destinations call establishment is denied or delayed. The present invention is particularly useful in controlling repetitive dialing that may overload the telephone network.
REFERENCES:
patent: 5060258 (1991-10-01), Turner
patent: 5357564 (1994-10-01), Gupta et al.
patent: 5359649 (1994-10-01), Rosu et al.
patent: 5408528 (1995-04-01), Carlson et al.
patent: 5454033 (1995-09-01), Hahn et al.
patent: 5524145 (1996-06-01), Parker
patent: 5537611 (1996-07-01), Rajagopal et al.
patent: 5646988 (1997-07-01), Hikawa
patent: 5655013 (1997-08-01), Gainsboro
patent: 5802157 (1998-09-01), Clarke et al.
patent: 5872840 (1999-02-01), Wu
patent: 5881140 (1999-03-01), Gerault et al.
Mase et al. "Advanced Traffic Control Methods for Circuit Switched Telecommunications Networks", IEEE Communications Magazine, Oct. 1990, vol. 28, No. 10, pp. 82-88.
Belzile Pierre
Meubus Charles
Tessler Michael
Hong Harry S.
Nortel Networks Corporation
Tieu Benny Q.
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