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From: manderso@sdcsvax.UUCP (Mark Anderson)
Newsgroups: net.rumor,net.news.adm
Subject: Re: Phone privacy
Message-ID: <1756@sdcsvax.UUCP>
Date: Wed, 7-May-86 12:48:43 EDT
Article-I.D.: sdcsvax.1756
Posted: Wed May  7 12:48:43 1986
Date-Received: Sat, 10-May-86 19:56:03 EDT
References: <703@frog.UUCP> <12400018@uiucdcs> <2410@jhunix.UUCP>
Reply-To: manderso@sdcsvax.UUCP (Mark Anderson)
Organization: EECS Dept. U.C. San Diego
Lines: 13
Keywords: scrambler
Xref: watmath net.rumor:2210 net.news.adm:687

>
>The test consoles which were once widely used by telco operators who
>were running tests on the integrity of the phone lines, all incorporated
>a randomizing filter which reduced speech to a pattern of buzzing and
>clicking.  It was recognizable as speech if you knew what it sounded like
>but wasn't understandable at all.  The phone companies required that this
>filter be added because of some government regs about phone-tapping.
>Hutch

I heard that this filter is now required on all phones. I know it is
in my phone for sure.

					manderso!sdcsvax