Re: GS modem troubles

[supertimer@aol.com (Supertimer)]

jlogo@NOSPAM.zip.com.au (John Logothetis) wrote:

>I have an Apple IIGS (ROM Rev 3) 1.4MB system connected to a generic
>33k6bps external faxmodem that I am trying to get working correctly.
>
>I have setup Proterm 2.1 to use the GS's serial port and created a
>modem entry with a default init string (AT&F) and can successfully
>enter terminal mode through Open-apple CTRL-T.
>
>Now the problem.  I have set the port speed of my system entry to
>19.2Kbps and also entered two AT commands at the terminal mode which
>>will lock the modem at a DCE rate of 14.4Kbps (ATS37=11, ATN0).  Every
>time I try to dial a system I get a successful connection but no
>echo-response from the remote.  Data is definitely comming down the
>line and the AT&F enables echoing by default.  I suspected my modem
>cable isn't fully RTS/CTS compliant or the handshaking is wrong.

ProTERM 2.1, while good, is too old to properly do high speed
communication.  You need to upgrade to ProTERM 3.1, which
includes a port driver supporting speeds of up to 56k.

With the upgrade, you really only need to set up an entry
in your ProTERM 3.1's phone book with the port set to 56k
or 38k4 and select your 33k6bps modem from the list of modem
drivers and everything else is automatic.  Besides, the feature
list has been EXTENSIVELY upgraded.

Go to http://www.intrec.com/ Intrec for details.  Upgrades
involve verification of version 2.1 ownership, but the benefits
are a valuable upgrade at a huge discount.

>BTW, The modem cable is the Mini-DIN type used on most Mac systems.  
>
>Any ideas? Do I need a GS-specific modem cable?.

The Macintosh cable is the correct cable.  It may be that
this particular Mac cable is too old and designed to
support only 2400 speed modems.  If it was designed for
14.4 or faster modems on the Mac, then it should be a
hardware handshaking cable on the IIGS too.