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- Path: inforamp.net!ts18-05
- From: crs0794@inforamp.net (Geoffrey Welsh)
- Newsgroups: comp.dcom.modems
- Subject: Re: 512Kbps modem developed by Ericsson
- Date: 8 Apr 1996 01:34:14 GMT
- Organization: InfoRamp Inc., Toronto, Ontario (416) 363-9100
- Message-ID: <4k9qem$fnf@sam.inforamp.net>
- References: <4k9grj$q2t@rubens.telebyte.nl>
- NNTP-Posting-Host: ts18-05.tor.istar.ca
- X-Newsreader: News Xpress Version 1.0 Beta #4
-
- In article <4k9grj$q2t@rubens.telebyte.nl>,
- hong@telebyte.nl (Hong Zhou) wrote:
- >Hi all,
- >
- >I have just learned from Australia Financial Review
- >that a research Lab of Ericsson in Vianna has developed
- >a 512kbps modem for conventional telephone line.
- >
- >Has anyone else read this spetacular news as well?
-
- I am certain that there is no way to build a modem wich establishes a 512 kbps
- data stream over the public switched telephone network, and I am not impressed
- by Hayes/PPI's claim that their superior data compression makes their 28.8
- modems equivalent to 230.4 kbps devices. There are various schemes to get
- high rates between the home and the calling office, but they all require
- specialized equipment at the phone company's office and one can't establish a
- high-speed link just by buying two of the devices and plugging them into phone
- jacks anywhere in the world and having one call the other.
-
- The reason for my comment on the raw data rate is that most calls though the
- public switched telephone network are digitized into a data stream of no more
- than 64 kbps, and there's no way to squeeze more than 64 kbps through such a
- connection and bring it out recognizably on the other side.
-
- --
- Geoffrey Welsh, Developer, InSystems Technologies Inc.
- Temporary: crs0794@inforamp.net; At work: insystem@pathcom.com
- At home: geoff@zswamp.uucp or [xenitec.on.ca|m2xenix.psg.com]!zswamp!geoff
- Capitalism is a cold-hearted system which guards the interests of whoever's
- at the top, yet hypocritically claims that it offers everyone a fair shot.
- So is every other system ever put in place by man.
-