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- Newsgroups: comp.dcom.modems
- Path: FreeNet.Carleton.CA!an171
- From: an171@FreeNet.Carleton.CA (Anthony Hill)
- Subject: Re: RPI chip?
- Message-ID: <DnB216.6C4@freenet.carleton.ca>
- Sender: an171@freenet5.carleton.ca (Anthony Hill)
- Reply-To: an171@FreeNet.Carleton.CA (Anthony Hill)
- Organization: The National Capital FreeNet
- References: <4gfs90$st6@nuntius.u-net.net>
- Date: Sun, 25 Feb 1996 00:15:06 GMT
-
-
- Phillips (?@gramar.u-net.com) writes:
- > Hi.
- >
- > A friendly chappie explained to me that my modem has an RPI chip which is not
- > ideal for Internet (and other) connections and as a result was the cause of some
- > connection problems I was having.
- >
- > To establish that I did have an RPI chip he (over the phone) guided me through a
- > test. The test went as follows:
- >
- > Run Win3.11 Terminal, go into 'Settings' then 'Communications'. I then set up
- > the appropriate baud rate, 7 data bits, even parity (this is a serious matter so
- > no parity/party jokes please!! ;-)) and finally hardware flow control. The afore
- > mentioned was OK'd and we went back to the terminal window. He now asked me to
- > type some instructions and from this could determine if I had an RPI chip. The
- > instructions and result went as followed...
- >
- > at
- > OK
- > at+h0
- > OK
- >
- > He then went on to explain that I had an RPI chip in my modem and that if I ever
- > decided to upgrade it would be better to get a modem without this chip. In fact
- > he kindly recommended a US Robotics 28800 after I explained that I do soon
- > intend moving up from my 14400.
- >
- > I would appreciate any comments on the feasibility of the above tests in showing
- > that my modem doesn't have error correction, and would be a cause for a slow or
- > difficult connection as a result of having an RPI chip. I have no problems with
- > my U-NET connection and this wasn't a telephone conversation with any of their
- > staff but one of Compuserves'. Looking at Netscape 2's figures my average access
- > is about 800 bps (14400 baud modem) to U-NET, is this good or bad?
-
- That's quite bad. A 14.4 modem should be transfering at about
- 1500 to 1700 cps depending on what sort of software overhead you're
- getting (assuming you're transfering compressed files, uncompressed files
- will transfer faster). What you should do is get the WinRPI drivers off the
- Rockwell home page (http://www.tokyo.rockwell.com) and install those.
- Obviously these only work while in Windows, but you should notice a big
- improvement in throughput since these drivers will give your error control
- and data compression.
-
- > Could anyone recommend a fairly priced 28800 modem too?
-
- Well, the USR Sportster is certainly an ok choice. But if I were
- you, I'd first figure out what sort of modems you'll be connecting to
- most, and get the mdoem that's as similar to them as possible, eg if
- they're running Rockwell based modems, get a Rockwell based modem (eg
- Supra), if they're running AT&T based modems, get an AT&T based modem (eg
- Multitech), if they're running USRs, get a USR, etc..
-
- Anthony
-
- --
- Anthony Hill | an171@FreeNet.Carleton.CA
-