[pct-l] SHARP TM-20?

[calliger@infolane.com (R.J.Calliger)]

You are still in error.

I requested you to respond OFF LIST please....

Ok?


At 1:26 PM -0800 3/5/01, R.J.Calliger wrote:
>At 8:04 AM -0800 3/5/01, Brick Robbins wrote:
>>Not true in this case.
>>
>>Your voice is analog data. The phone seems to work with it OK. <g>
>>Not true in this case.
>
>
>What I said is true.  I am *very* surprised you questioned me!!
>
>Your voice does not switch at 28KBS or 56KBS or use Kflex!! <g>....
>
>I thought this was (obviously) apparent when I said "analog data"
>which differentiates it from "voice".
>
>NOTE-  voice is not "analog data", per se, wherein data is defined
>as digital computer data stream converted from Digital (inside the computer)
>to analog at a **high speed**.. one does not usually consider the
>voice as "data" although in a purely Spockian sense it is included
>in the (marginal) definition of data transmission set theory.
>A modem MOdulates and DEModulates these signals. Thus
>we are speaking of two different things here- data rate as well
>as data content. Voice does not meet the criteria I stated as to
>either content or data rate, clearly.
>
>Heck- u can use two Pepsi (coke, beans, ..) cans (from the left over
>stove projects!! hah hah ha) and some string to transmit voice..
>but u can't do computers over a string!!!)
>
>**SOME** of the smaller companies competing with the Ma Bells
>use an inexpensive CSS (central switching system) wherein
>the A/D (analog to digital conversion circuitry and chips)
>in their new digital phone lines (acoustic OR direct connection) just dont
>switch fast enuf to capture the FSK (Frequency shift keying)- which is old
>modem
>technology BTW- newer modem technology uses stuff (similar
>to spread spectrum ) like X2 standard--that is why we can get 56Kbs
>on twisted pair- even 128KBS on ordinary copper in DSL..which
>is  even much more demanding on the poor A/D's. See the patents
>for the X2 and KFLEX and greater specs for details.
>
>Also- Some of these use *2* (TWO!!) A/D's which completely hoses 56K and
>u can only use V.34 (33.6k max), if that!!!  1200 again may be needed. Some
>out of the way payphones work similar to the PBX's in your office and
>are prevelant in smaller (read that cheaper) phone systems.
>
>Another problem is that prior to February, 1998, there was no signle set
>standard for 56K modems. You had a choice between two
>proprietary 56K protocols: X2 from U.S. Robotics or K56flex
>from Rockwell  (and Lucent I believe- I dont recall preceisely).
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