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- Path: dispatch.news.demon.net!demon!bram-sys.demon.co.uk
- From: pete@bram-sys.demon.co.uk (Pete Jones)
- Newsgroups: comp.dcom.modems
- Subject: Re: Modem gurus.....I could use some help !!
- Date: Fri, 08 Mar 1996 23:57:56 GMT
- Organization: Bramble Software
- Message-ID: <3140b7b4.1272996@news.demon.co.uk>
- References: <4hhjav$3du@shell.fore.com> <4hnm7s$jbk@dsm6.dsmnet.com>
- Reply-To: pete@bram-sys.demon.co.uk
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-
- blockd@dsmnet.com (Dennis Block) wrote:
- [snip]
- >instead of 115K, or, get a phone number for 28.8K line to your ISP.
- >
- >BTW, some ISP's force there modems to a maximum speed far below the 115K
- >that a 28.8K modem is capable of. Kind of makes you wonder about
- >buying that 28.8 doesn't it? Ask your ISP.
-
- Hi Dennis
- I am a little bit concerned about the above. You talk about 28.8K
- modems being capable of 115K. My understanding is that the speed of a
- modem is given in "bits per second" so a 28.8K modem is able to
- transmit data at a maximum of 28.8Kb/s.
-
- The link between the PC and the modem should be run at a speed above
- this (say 38.4K) to ensure that the modem is always running at the
- maximum rate that it can cope with. There is very little gain to be
- made if the PC to modem link is configured to run at a higher rate.
- Higher rates are more likely to cause errors on the serial link!
-
- For your information, the 28.8K refers to the bearer rate of the link,
- that is the rate at which bits are moved between modems. One should
- also consider that a large number of those bits will be protocol bits
- (ARQs / CRCs etc) so your traffic rate will be somewhat less than
- 28.8K, probably more like 20kb/s.
-
- Regards
-
- Pete Jones
-
-