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- Newsgroups: comp.sys.ibm.pc.hardware,comp.sys.ibm.pc.misc,comp.windows.ms
- Path: sparky!uunet!usc!rpi!usenet.coe.montana.edu!selway.umt.edu!garion
- From: garion@selway.umt.edu (Jason Curnow)
- Subject: Re: Internal 14.4K Modems
- Message-ID: <1992Dec16.185058.26848@selway.umt.edu>
- Organization: University of Montana
- References: <1992Dec14.214713.15837@nosc.mil> <BzD405.3Bq@watserv1.uwaterloo.ca
- Date: Wed, 16 Dec 1992 18:50:58 GMT
- Lines: 37
-
- In article <BzD405.3Bq@watserv1.uwaterloo.ca> dherman@cape.UWaterloo.ca (Dennis Herman) writes:
- >I have done a bit of homework on the 14.4K FAX/modem business and came up
- >with a Zoom 14.4K S/R Internal Fax Modem. It is priced about 10% higher
- >than the Boca but does come with a buffered 16550A UART and some reasonabl
- >software (MTEZ (Telix look alike) and WinFAX lite). Zoom's stuff appears
- >to be as hardy as the big names USR and Practical Peripherals but doesn't
- >put much into marketing. PC Magazine wrote up a good review on a large
- >number of V32bis modems and I think Zoom was hard to beat for the price.
- >They come with a 7 year warranty ( who knows what you will be using in
- >7 years ). I haven't had a single problem with it and have used it alot
- >for communications and FAXes.
- >
- >If you are looking for trouble free high speed communications under
- >Windows you'll be lookin' a long time. Because of windows cooperative
- >multitasking and the some of the poor device drivers,interrupts can be
- >turned off for more than 4 milliseconds. The buffer on the 16550A is only
- >16 bytes or about 4 milliseconds long at high communications speeds.
- >THerefore you will more often than not run into data overrun problems
- >at high speeds under Windows. Best to compress the files at the source
- >or transfer pre ZIPped files. Anything over 1100 char/sec under windows
- >seems to cause retries using Zmodem on a 33 Mhz 486. Better yet do your
- >high speed data transfers under DOS.
-
- That's funny.. I have no problems doing z-modem and/or ymodem-g transfers
- within Windows. I regularly get 1500+ cps transferrs without retries
- or errors. I'm using a Digicom Scout Plus (A great modem for the money!),
- and Procomm for Windows. I've even transferred some text files and gotten
- very high throughput (Can't remember the exact number) without any retries.
- The Digicom has a built-in 16550 UART (of which flavor I am not sure..).
- Always has worked great!
-
- - Jason
- --
- - Jason Curnow University of Montana
- garion@selway.umt.edu CIS Consulting
- con_jpc@lewis.umt.edu (406) 243-2974, LA 40
-
-