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- Newsgroups: comp.dcom.modems
- Path: FreeNet.Carleton.CA!an171
- From: an171@FreeNet.Carleton.CA (Anthony Hill)
- Subject: Re: Cardinal 288I & 1.4 Firmware
- Message-ID: <DnnvrL.BDE@freenet.carleton.ca>
- Sender: an171@freenet5.carleton.ca (Anthony Hill)
- Reply-To: an171@FreeNet.Carleton.CA (Anthony Hill)
- Organization: The National Capital FreeNet
- References: <4gg9rj$gvo_001@L62.borg.com> <DnEBI1.7zs@freenet.carleton.ca> <4gthrl$lpu@news.service.uci.edu>
- Date: Sat, 2 Mar 1996 22:28:33 GMT
-
-
- Peter Ho (pho@nova.bli.uci.edu) writes:
- > In article <DnEBI1.7zs@freenet.carleton.ca>,
- > Anthony Hill <an171@FreeNet.Carleton.CA> wrote:
- >
- >> Dont' just look at connect rates though. I just recently got a
- >>Cardinal, and I've found that it runs at a rather high error rate, and as
- >>a result the speed of a 28.8 connection with this Cardinal is about the
- >>same as the speed of a 26.4 connection with any other modem I've used (and
- >>no, the modem did not fall-back, it would always stay at 28.8 throughout
- >>the connection).
- >
- > What was your transmit and receive speed? The CONNECT XXXXX only shows
- > the transmit speed. Even though you got CONNECT 28800, I suspect you
- > actually connected at transmit:28000/receive:26400 and were downloading
- > at the slower 26400. Did you do test both download and upload? Were the
- > throughput the same in both directions? If you have the v1.40 firmware
- > do AT\V1 to show both the transmit and receive connect speed upon
-
- I was using \V1, my connect speeds where using Tx:28800/Rx:26400 or
- Tx:28800/Rx:26400 (except for one board which always gives me slower
- connections). I didn't test uploading too much (as with most other
- people, most of my traffic is in the recieving dirrection).
-
- > connecting. My experiences were different from yours. I use an init
- > string of AT%C0\N2\A3 on the Cardinal MVP288I. This disables compression,
- > forces MNP4 error correction (less overhead than v.42), and selects a
- > maximum MNP block size of 256 characters. This is similar to doing
-
- I was using something like AT&F S11=50 S95=47 S91=12 \V1 S2=124,
- that resets to the factory defaults, speeds up dialing, gives full result
- codes (not really useful with the \V1), reduces the transmit attenuation
- from -10dBm to -12dBm (optimal setting for my lines, other S91 settings
- just slow things down), turns on the one line connect results and changes
- my escape character from + to | (a lot of boards around here haven't
- changed the escape character on their end, so if I don't change it on my
- end I drop their modem into command mode as well as my own).
-
- > AT%K0S27=32 on the USR v.34 modems that you're probably more familiar
-
- That should be &K0.
-
- > with. This gives me the best throughput for compressed (ZIPped) files.
- > At 28800, I get 3440 cps using Ymodem-G. The Cardinal works so well I
-
- I don't only transfer compressed files, so v.42bis speeds things
- up a fair bit, of course that means I need to use LAP-M (which may be the
- source of the problems). I tend to use ZModem since it's almost as fast
- as YModem-G and I really hate downloading a bit file then having it abort
- right near the end because I got one little com overrun (which shouldn't
- happen, but while multitasking there are no garuntees). In any case, it
- transfer as about 3000-3050cps on a 28.8 connection vs. 3200-3250cps with
- most other modems I've used (USRs, Sportsters, Motorola's, Infotel, etc.).
-
-
- > recently installed a second one in the same computer and using two lines
- > to get a combined bandwidth of ~6k to the internet (poor man's ISDN 1B
- > channel). The only thing that's stopping me from adding a third modem is
- > that I'm out of low (7 or below) IRQ's. If I had only bought a
- > motherboard with PS/2 mouse port using IRQ12 then I could put the third
- > put on COM1.
-
- You could try setting one modem to Com2 IRQ3, one to Com3 IRQ5,
- and one to Com4 IRQ7 (or various combinations of the above), that should
- work with most computers, although you probably wont be able to print at
- the same time as your using your modems. Anyway, all in all the Cardinal
- is a reasonable modem, especially for the price, it's just a bit slower on
- any given line then the Motorola's and USRs that I've used (even when
- connecting to Supras or Zooms or other Rockwell based modems). My
- Cardinal also isn't a big fan of Multitechs (I managed a 7200/24000
- connection where the Motorola and USRs consistantly made 28800/28800
- connections). The only place that Cardinals seem to have a bit of an edge
- is when connecting to Hayes modems, of course with all the troubles that
- Hayes v.34s have been having those are disappearing pretty fast.
-
- Anthony
-
- --
- Anthony Hill | an171@FreeNet.Carleton.CA
-