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From: nynex1!ggray@uunet.uu.net (George Gray)
Newsgroups: comp.dcom.telecom
Subject: Re: Data Over Voice
Message-ID: <2123@accuvax.nwu.edu>
Date: 13 Dec 89 15:23:28 GMT
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X-Telecom-Digest: Volume 9, Issue 571, message 5 of 11


DOV (Data Over Voice) is a techniqiue that uses a single pair of wires
that permits both data and voice on a line simultaneously.  The data
portion of the service is modulated at a higher frequency outsied of
the normal voice conversation. For example, the voice conversation is
at 300-4000 Hz (approx) and the data would be sent at 40Khz on the
receive side and 80Khz on the transmit side. Because of the
frequencies involved, the operating distances between 2 DOV units is
usually less than 10,000 feet.  DOV units are connected similar to a
modem with a TESLSET jack and a TELCO LINE jack plus power. There are
several maufacturers of these units among them are TELTONE and APPLIED
SPECTRUM TECHNOLOGIES.


George Gray