jimmy@denwa.info.com (Jim Gottlieb) (11/11/90)
We have been using Dialogic voice boards for several years now and have several hundred in service. Yet I am not completely happy with them and would like to hear about the competition. Specific complaints include bad ring-detect circuitry (shout into the phone and the board goes off-hook) and the lack of a hybrid circuit to prevent output audio from finding its way into the touch-tone receiver (the board will often not hear a touch-tone from the user if pressed at the same time as speech is being played). 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. Jim Gottlieb E-Mail: <jimmy@denwa.info.com> or <attmail!denwa!jimmy> V-Mail: +1 213 551 7702 Fax: 478-3060 Voice: 824-5454
dave@westmark.westmark.com (Dave Levenson) (11/16/90)
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