Path: utzoo!utgpu!water!watmath!clyde!cbosgd!ihnp4!cord!nsw
From: nsw@cord.UUCP (N Weinstock)
Newsgroups: comp.sys.amiga
Subject: Re: 19.2k baud modems
Message-ID: <503@cord.UUCP>
Date: 18 Dec 87 17:46:27 GMT
References: <7403@ccicpg.UUCP>
Reply-To: nsw@cord.UUCP (59455-N Weinstock)
Organization: AT&T Bell Laboratories, Liberty Corner
Lines: 42

In article <7403@ccicpg.UUCP> harald@ccicpg.UUCP writes:
>
>	Yes, there is such a beast. We just got one, on order for 3 months.
>We got it at discount for $700 plus bucks. The discount is applied to uunet
>subscribers. Else, pay a hefty $1500.
>
>	Its called a TrailBlazer. Want to know more?
>
>-- 
>Work: Computer Consoles Inc. (CCI), Advanced Development Group (ADG)
>      Irvine, CA (RISCy business! Home of the CCI POWER 6/32)
>UUCP: uunet!ccicpg!harald


Thought I'd stick my $.02 in.  The TrailBlazer is supposed (haven't actually
touched one myself) to be a very spiffy unit which will likely become a
standard for 19.2Kbps modems.  (By the way, BAUD rate is the signalling
frequency, not the data rate.  The TrailBlazer is a 19.2K bits per second 
modem, NOT 19.2Kbaud.  Sorry to be nitpicky, but I just learned this 
distinction recently :-)

This modem constantly checks the quality of the line, and adjusts data
rate accordingly.  It has supposedly been clocked at an average of about
14Kbps over random long-distance lines.  Pretty impressive.  I would guess
that if a conditioned line were available, it could probably make 19.2.

My understanding is that this thing works by subdividing the 3KHz voice band
into a large number of subchannels, and transmitting many bits in "parallel."

Well, that's all the hearsay I've heard said.  If this posting is a giant 
glob of misinformation, please correct (or flame) me.  I'm very interested in
how the TrailBlazer works.
-- 
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|                                                                   |
| Neil Weinstock                          UUCP: ...!codas!cord!nsw  |
| AT&T Bell Labs, Liberty Corner          NET:     nsw@cord.att.com |
| Warren, NJ                              (which one? I DON'T KNOW) |
|                                                                   |
|        DISCLAIMER:  My views are entirely my own, I think         |
|                                                                   |
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