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From: gaarder@tcgould.tn.cornell.edu (Steve Gaarder)
Newsgroups: comp.dcom.telecom
Subject: Noisy Enviroments and Sidetone
Message-ID: <10064@accuvax.nwu.edu>
Date: 24 Jul 90 16:20:46 GMT
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>Related question: anybody know how to deal with phones in a noisy
>environment like a machine room
     .....
>The problem is room noise picked up in
>the mouthpiece and heard through my earpiece (is sidetone the right term
>for that?)[yes] If I cup my hand over the mouthpiece, I can hear fine, but
>that's a real drag.  I think what I want is a push-to-talk handset, but
>havn't been able to fine any.  Any suggestions?
	
What you really want is a "push-to-listen" phone.  The button disables
the mike.  Many fancy phones have this, usually called a "mute"
button.  My ATT cordless has one, and it's even placed where I can
push it using the hand holding the handset.  It has come in real handy
when trying to have a conversation with a screaming baby in my lap
(talk about noisy environments..).

A good old 500 set can be modified pretty easily - just install a
normally open pushbutton so it shorts the mike, or a normally closed
so that it opens one of the wires to the mike.  I even have a couple
of 500 handsets with built-in buttons that I think could be wired as
mute buttons.  If you want one, let me know - I'll swap it for a
standard 500 handset.


Steve Gaarder
gaarder@batcomputer.tn.cornell.edu
...!cornell!batcomputer!gaarder