Nortel Networks Corporation

Michael Tessler

Charles J Meubus

Pierre Belzile

The invention provides a method and a system for selectively delivering information to callers in an AIN environment. In accordance with the method the service switching point to which is connected the terminal equipment of the caller monitors the condition of the telephone line to detect an AIN trigger, such as an off-hook event among other possibilities. When such event occurs, the service switch point formulates a message query. The query is routed to a service control point via one or more service transfer points, that holds knowledge of the service subscribed by the caller and the information to be displayed for this service. The service control point analyzes the request and assembles the appropriate response. That response is then returned to the service switch point that formats it properly and delivers it to the terminal equipment of the caller. In one embodiment the information delivery is effected during call establishment. In a variant, information is delivered while no call is being attempted.

Delivery of display information to the caller in an advanced intelligent network

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.

Growing community of inventors

Memphis, TN, United States of America

Michael Tessler