Path: utzoo!attcan!uunet!decwrl!hayes.fai.alaska.edu!accuvax.nwu.edu!nucsrl!telecom-request
From: dave@mars.njit.edu (Dave Michaels cccc)
Newsgroups: comp.dcom.telecom
Subject: How Does a Telephone Receiver Work?
Message-ID: <9841@accuvax.nwu.edu>
Date: 17 Jul 90 17:04:14 GMT
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X-Telecom-Digest: Volume 10, Issue 493, Message 9 of 9


A telephone handset has four wires going to it, two for mike, and two
for speaker.  How does the phone merge these two into a full duplex
pair of wires?  Also, I disconnected the transmitter disc trying to
make a 'mute' feature on a phone without one, and discovered my friend
can still hear me (at a reduced volume) from the earpiece ... hmm,
why?