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From: dave@westmark.westmark.com (Dave Levenson)
Newsgroups: comp.dcom.telecom
Subject: Re: Dialogic vs. AT&T Voice Power vs. ...
Message-ID: <68880@bu.edu.bu.edu>
Date: 16 Nov 90 01:37:38 GMT
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X-Telecom-Digest: Volume 10, Issue 826, Message 11 of 12


In article <14540@accuvax.nwu.edu>, jimmy@denwa.info.com (Jim
Gottlieb) writes:

[ regarding PC voice i/o boards ]

> The other four-port boards that I know of are the AT&T Voice Power
> board, and a similar board from Rhetorex.  How do these compare?
> Unfortunately, Rhetorex does not provide Unix drivers.

AT&T Voice Power includes a UNIX driver (for AT&T UNIX SysV/386) and a
C application program interface library.  As far as I know, no driver
for MS-DOS was ever offered.  The audio quality is better than
Dialogic.  Compression is more effective (2000 bytes per second of
speech, with optional silence-compression making it even tighter).
Early versions of the board suffered from talk-off (speech being
detected as touch-tones) and from imperfect silence detection.  Later
versions improved both of these areas.  The cost per line is about 2x
the Dialogic cost for the four-line board.


Dave Levenson		Internet: dave@westmark.com 
Westmark, Inc.		UUCP: {uunet | rutgers | att}!westmark!dave
Warren, NJ, USA		AT&T Mail: !westmark!dave 
Voice: 908 647 0900     Fax: 908 647 6857