Newsgroups: comp.dsp
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!uupsi!nynexst.com!vermont!smehta
From: smehta@kwela.nynexst.Com (Sandeep Mehta)
Subject: Re: DSP board with telephone interface
In-Reply-To: phil@east.Berkeley.EDU's message of 29 May 91 20:36:01 GMT
Message-ID: <SMEHTA.91May30140922@kwela.nynexst.Com>
Sender: news@nynexst.com (For News purposes)
Organization: Speech Technology, AI Lab, NYNEX S&T, White Plains, NY
References: <14157@exodus.Eng.Sun.COM> <1991May29.203601.19054@agate.berkeley.edu>
Date: 30 May 91 14:09:22


> phil@east.Berkeley.EDU (Phil Lapsley) writes:

   If you want to avoid building the (analog) hardware, you might check out
   Atlanta Signal Processors, Inc.'s (ASPI) "Serial Voice Interface" box
   with the telephone line interface option.  This is a small box that
   has a TI TLC32040 14 bit codec, telephone line, and telephone handset
   interface.  The data from the codec is output via RS 422, and it's then
   your problem to get it into the DSP of your choice.  The price?  $895.00
   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Phil has pointed at one set of solutions to work around building one's
own box, but we've had a snag w/ ASPI boxes...

We use the ASPI Serial Voice Interface and the Serial Audio Interface
box The latter is higher bandwidth (20Hz-20KHz) and more $$. But, and
here is the crunch, we can't seem to get the driver working for the SVI.
The SAI driver runs fine. Both drivers are developed in-house. We're
using it with a DSP32C based VME board (from Valley Instruments). ASPI
basically said that the problem is clock related, sorry, buy our SAI box
instead, and have a nice day! I'm debugging the SVI driver in the hope
that we can salvage the SVI based box(es).

Burr Brown also makes boxes, though they're very high (MHz) b/w for my
use.  I didn't see anything in the VME/Sun world from Ariel @ ICASSP
this year...

so, caveat emptor...

sandeep
--
smehta@nynexst.com
--

"But jazz is decadent bourgeois music," I was told, for that is what the
Soviet press had hammered into Russian heads.
"It's my music," I said, "and I wouldn't give up jazz for a world revolution"
	- Langston Hughes
