Path: utzoo!attcan!uunet!cs.utexas.edu!sun-barr!decwrl!amdcad!diablo!tc
From: tc@diablo.amd.com (Tom Crawford)
Newsgroups: sci.electronics
Subject: Re: How can I restrict outgoing phone calls?
Message-ID: <25678@amdcad.AMD.COM>
Date: 18 May 89 14:59:53 GMT
References: <778@tetons.UUCP> <21001@genrad.UUCP> <1989May18.042535.9003@utzoo.uucp>
Sender: news@amdcad.AMD.COM
Reply-To: tc@diablo.AMD.COM (Tom Crawford)
Organization: Advanced Micro Devices, Inc. Sunnyvale CA
Lines: 13

>>...If you do what you say, disable the keypad, they
>>can still make calls anywhere they want with a hand held dialer (assuming
>>that you have tone service)...
>
>And if they're deft, they can make calls anywhere they want even if you
>*don't* have tone service, by rapidly pulsing the hookswitch (the switch
>that distinguishes between "on hook" and "off hook", often by having the

I know from first hand experience that you can "dial" O(perator) by
pulsing the hookswitch.  Then you can place an operator-assisted call
anywhere you like...

		Tom Crawford