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Article #96Re: Rockwell 56k modem - will it work?
From: Craig Morton
Date: Wed, 06 Nov 1996 00:00
Date: Wed, 06 Nov 1996 00:00
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Pete Kockritz wrote: > > In article <slrn57ju57.gsn.bet@onyx.interactive.net>, bet@interactive.net > (Bennett Todd) wrote: > > > > That's my reading of their marketing propoganda; see > > <URL:http://www.nb.rockwell.com/mcd/56kmodem/>. > > USR has a white paper on their new modem at: > <http://x2.usr.com/technology/wp.html> > > Regards, > Pete > -- > This paper describes how the most 'robust' 128 PCM voltage levels are used to produce a 56Kbps data stream. The other levels, are optimized for voice (they are all non-linear). As North America uses u-law quantization and the rest of the world? a-law quantization, is there enough difference to produce more or less 'robust' useable PCM voltage levels? and therefore a different data rate? Does the modem pair continually train - to select the best 128 voltages, once only or are they preset? will it work?!?
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f4e50,51d4eb73fe922b62 X-Google-Attributes: gidf4e50,public X-Google-Thread: fc9bd,cb9877bcf635a7b5,start X-Google-Attributes: gidfc9bd,public From: Craig Morton <cmorton@ozemail.com.au> Subject: Re: Rockwell 56k modem - will it work? Date: 1996/11/06 Message-ID: <327FEA7D.85E@ozemail.com.au> X-Deja-AN: 194749751 references: <55a901$bbh@mulga.cs.mu.OZ.AU> <slrn57ju57.gsn.bet@onyx.interactive.net> <Pete.Kockritz-0311962045390001@192.168.22.22> content-type: text/plain; charset=us-ascii organization: Moving Data P/L mime-version: 1.0 reply-to: cmorton@ozemail.com.au newsgroups: comp.dcom.telecom.tech,aus.comms x-mailer: Mozilla 3.0Gold (Win95; I)