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From: dant@ryptyde.UUCP (Daniel Tracy)
Newsgroups: comp.sys.mac.comm
Subject: Re: PacerTerm announcement
Message-ID: <27@ryptyde.UUCP>
Date: 6 Jun 91 07:10:10 GMT
References: <55534@nigel.ee.udel.edu> <11884@hub.ucsb.edu>
Reply-To: dant@ryptyde.UUCP (Daniel Tracy)
Organization: Ryptyde Timesharing
Lines: 15

Responding to the following:

"I am curious too!  How can they do multiwindow communication with
a modem?  Or can they do that at all?  That's the most tempting
feature of all, IMHO."

This is an innate ability of the Communications Toolbox supplied with System 7.
Since this program supports the CTB, it can leave this job to the OS. However,
you will, of course, need multiple modems! There is a physical limit stating
you cannot open two different channels on the same line (unless you're using
ISDN!). However, you can do simultaneous uploads and downloads (as well as
chat at the same time!) using a program called MultiXfer. The same program
must also be on the other side (this is a Macintosh program). It uses a
proprietary protocol that handles simultaneous upload/download/chat VERY
efficiently (twice as efficient as Zmodem when handling multiple transfers).