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Automatic Modem disconnect for emergency

IP.com Disclosure Number: IPCOM000015356D
Original Publication Date: 2002-Jan-02
Included in the Prior Art Database: 2003-Jun-20
Document File: 1 page(s) / 39K

Publishing Venue

IBM

Abstract

Today many people have their computers using a modem on their phone line constantly. This is a problem when a user needs to make an emergency call such as a 911 call or a security system needs to call in on a break-in. The phone line is busy and there is no easy method for the user or security system to force the modem off the line. This disclosure is a method where the user on

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Automatic Modem disconnect for emergency

Today many people have their computers using a modem on their phone line constantly. This is a

problem when a user needs to make an emergency call such as a 911 call or a security system

needs to call in on a break-in. The phone line is busy and there is no easy method for the user or

security system to force the modem off the line. This disclosure is a method where the user on

emergency and/or security system can force the modem off the line and than dial the proper number.

Currently modems only back off the line when they detect a carrier signal lost. A carrier signal lost is basically the other modem on the other side of the line stops sending data. The modems have a timeout field and will disconnect when the timeout field is hit. Dialing 911 or a security number does not cause the modem to hang up as the other modem is still sending data and the time length of the dialing is to short to effect anything.

This disclosure address's two methods of forcing the modems off the line:

Method 1 is to force carrier signal lost which will then cause both modems to drop the line thereby allowing the phone to be open. The best method of doing this is to create noise on the line which overlays the modem data. New phones and new security systems will have this override function. The override function will be engaged whenever the phone dials 911 and/or the security system calls the security home base (Call this Emergency/Security Overr...