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- Path: FreeNet.Carleton.CA!an171
- From: an171@FreeNet.Carleton.CA (Anthony Hill)
- Newsgroups: comp.dcom.modems
- Subject: Re: V.32 terbo
- Date: 25 Mar 1996 23:47:00 GMT
- Organization: The National Capital FreeNet
- Sender: an171@freenet2.carleton.ca (Anthony Hill)
- Message-ID: <4j7b9k$826@freenet-news.carleton.ca>
- References: <4ho7ql$2g5@cub.flex.net> <4hs1u7$427@panix3.panix.com> <4ip5h3$mci@mips.pfalz.de> <31570319.285D@interserv.com>
- Reply-To: an171@FreeNet.Carleton.CA (Anthony Hill)
- NNTP-Posting-Host: freenet2.carleton.ca
-
-
- V C Lant (vclant12@interserv.com) writes:
- > Christian Weisgerber wrote:
- >>
- >> schuster@panix.com (Michael Schuster) writes:
- >>
- >> > "V.32 terbo" is a proprietary protocol (to AT&T Paradyne) and so you will
- >> > only connect in that mode to modems made by them, or using their data
- >> > pump.
- >>
- >> V.32terbo is also implemented by some other independant (i.e. not
- >> depending on somebody else's chipsets) modem manufacturers, e.g.
- >> USRobotics (Courier) and Telebit (Fastblazer).
- >>
- >> The V.32terbo specs seem to be freely available.
- >>
- >> --
- >> Christian 'naddy' Weisgerber naddy@mips.pfalz.de
- >
- > The question is not what's a standard and whose but :
- >
- > - what is the percentage of market penetration of V.32terbo?
- > hint : nearly nothing. USR modem are frequent at ISP sites but check out their
- > connect statistics for terbo modes.
-
- It isn't exactly the most popular protocol around, but it DOES
- have some use. And hey, 19.2 is faster then 14.4 by about 500cps (on
- pre-compressed files).
-
- > - do you get a better connectivity and throughput at 16.8 and 19.2 at V.34 or
- > by connecting at V.32terbo at such speeds ?
- > hint : not at terbo.
-
- There is no difference in throughput. Of course, if you're only
- connecting at 19.2 with v.34, chances are that you will NOT connect at
- 19.2 with terbo.
-
- > - why did Zyxel abandon pushing their version of V.32bis extension (which is what
- > the terbo is) and limit it to 16.8k only?
-
- Since Zyxel pushed their v.32bis extension up to 19.2kbps quite
- some time ago (before Terbo appeared), I think we can safely ignore this
- question.
-
- > hint : that technique has been a dead-end before and after the V.34 introduction
- > for performance reasons. AT&T's flavor is no exception to it.
- >
- > V.32terbo today is what Bell212A has been for many years. A checkmark on feature
- > list. Don't beat the dead horse.
-
- v.32terbo is more like vFC, a temporary protocl that is no longer
- with us in any great numbers. It served it's pupose and did so fairly
- well. It allowed companies to build faster modems with VERY little change
- in design/cost. v.34 on the other hand, requires a complete rebuild of
- almost all modems on the market, and MUCH more complicated software
- modifications. In any case, the only thing that Christian said was that
- Terbo was availible on more then just AT&T modems. First of all it's
- availible on both AT&T Paradyne modems (the ones who invented the
- protocol), and AT&T ME based chipset modems (Paradyne doesn't make the
- chipsets, although they may help out to some extend). USR, and Telebit
- are two other companies that liscened the protocol, and there are others.
- Just because not too many people use Terbo anymore doesn't mean that it
- isn't there.
-
- Anthony
-
- --
- Anthony Hill | an171@FreeNet.Carleton.CA
-