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- Path: news2.aimnet.com!usenet
- From: JNavas@NavasGrp.com (John Navas)
- Newsgroups: comp.dcom.modems
- Subject: Re: 21,600 on a 28,800???
- Date: Sun, 31 Dec 1995 18:38:17 GMT
- Organization: The Navas Group of Dublin, CA, USA
- Message-ID: <4c6l84$8nn@news2.aimnet.com>
- References: <00001a31+00006a2c@msn.com> <4c4648$p6r@dec-alpha.fred.net>
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-
- [Posted to comp.dcom.modems]
- daleg@fred.net (Dale Ghent) wrote:
-
- >Line noise and other factors can contribute to a lower connect rate. Line
- >noise is a big thing because each phone line has 4KHz of bandwidth. To
- >connect at 28,800 speeds, a modem requires a bandwitdth in the high
- >3.7KHz range. It can be done, but line noise cuts on average about .2 to
- >even 1KHz of bandwidth out of your line, therefore making your modem bump
- >down to a lower speed (or even making it dissconect). Its like driving a
- >6 foot wide car through a 6'1" alley.
-
- >Call you telephone service provider and have them test your lines, or go
- >to Radio Shack and look for a EMI (Electro-magnetic Interference) filter for
- >your phone lines.
-
- A filter will not help, and may even make things worse.
-
- --
- Best regards,
- John mailto:JNavas@NavasGrp.com http://web.aimnet.com/~jnavas/
- 28800 Modem FAQ: http://web.aimnet.com/~jnavas/modem/faq.html
-
-