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From: dorner@pequod.cso.uiuc.edu (Steve Dorner)
Newsgroups: comp.sys.mac.comm
Subject: Re: MacTerminal 3.0 (more technical stuff)
Message-ID: <1991Apr24.132317.13900@ux1.cso.uiuc.edu>
Date: 24 Apr 91 13:23:17 GMT
References: <1991Apr23.224409.2375@ux1.cso.uiuc.edu>
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Organization: University of Illinois at U-C
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In article <1991Apr23.224409.2375@ux1.cso.uiuc.edu> resnick@cogsci.uiuc.edu (Pete Resnick) writes:
>5. Will it work just ducky with my good old 2400 baud Everex modem?
>Is it configurable so that I can insert things into the AT line
>(like L0 to lower the volume)?

If (working from no more info than you) MacTerminal is used with the standard
Apple Modem Tool, the answers are "Probably, if your modem is dumb" and
"Yes, but you won't find out how in the documentation."

First, the AMT does not work with MNP-5 or other data compression schemes.
The problem is that such modems run the serial port at a higher rate than
the phone line (*compression*).  However, the AMT insists on resetting the
serial rate to match the line rate, resulting in disaster.  This is fixable.

Second, you can get at the configuration string that's sent to the modem.
Hold down the option key when pressing on the modem type popup, and a
"Custom..." dialog box appears.  Choose it, and you'll be able to edit
the init string.  While you're in there, change "X4" to "X0", and your
MNP-5 modem will operate again; this makes the modem not report the phone
line speed, so the AMT doesn't have a chance to do anything stupid.

Other Incompatibilities:

The "US Robotics Courier" configuration that comes with the AMT is
DOA unless you have a hardware-handshake cable.  Delete the "&"
parameters from the init string if your cable isn't up to snuff.
Then it will work fine (again, if you're using compression, you
better change the X4 to X0...).

The "Lightspeed" 2400 MNP-5 modems don't work with the AMT.
Lightspeed claims that there's an update to the AMT coming out that
fixes the problem, but I haven't been able to get anybody at Apple
to fess up about it.
--
Steve Dorner, U of Illinois Computing Services Office
Internet: s-dorner@uiuc.edu  UUCP: uunet!uiucuxc!uiuc.edu!s-dorner