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- Path: nova.bli.uci.edu!pho
- From: pho@nova.bli.uci.edu (Peter Ho)
- Newsgroups: comp.dcom.modems
- Subject: Re: Cardinal 288I & 1.4 Firmware
- Date: 27 Feb 1996 00:05:09 GMT
- Organization: University of California, Irvine
- Message-ID: <4gthrl$lpu@news.service.uci.edu>
- References: <4gg9rj$gvo_001@L62.borg.com> <DnEBI1.7zs@freenet.carleton.ca>
- NNTP-Posting-Host: nova.bli.uci.edu
-
- 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
- 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
- AT%K0S27=32 on the USR v.34 modems that you're probably more familiar
- 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
- 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.
-
-