Section 3 : Running a Server

Q321: Should I use Class1 modems?

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Should I use Class1 modems?

Date: Tue, 13 Aug 1996 18:07:02 -0700
From: Sam Leffler <>
Subject: Re: Code 25??

    Subject:  Re: Code 25??
    Cc:  Joergen Haegg 
    Date: Tue, 13 Aug 1996 18:02:43 CDT
    From:  Eric Jergensen 

    Try using it as a class 1 fax.
    The USR Sportster I have works that way, but not as class 2.0.  USR
    seems to have solid modulation code and pathetic fax firmware.
I personally would not depend on the operation of a Class 1 modem 
under FreeBSD unless the system is dedicated to fax operation.  This
is not a slam against FreeBSD, I'd say the same thing about any system
that does not have explicit support for "realtime"-oriented applications.
There is also the issue that you are assuming that my Class 1 driver
is better than any Class 2/2.0 firmware that you can buy.  Given that
there are high quality Class 2/2.0 modems at inexpensive prices I can
see no reason to spend much effort on a Class 1 modem unless you:

1. Already have a Class 1 modem that you want to use.
2. Need some functionality that is not available with a Class 2/2.0

I used a Class 1 modem with my software in production use for several
years with excellent results.  I have since replaced it with a Class 
2.0 modem with as good if not better reliability.


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