Re: Multiport Serial

From: Bill Vermillion (bv_at_wjv.com)
Date: 11/25/03

  • Next message: Charles Swiger: "Re: start multiple sendmail daemons from rc.conf?" 
    Date: Tue, 25 Nov 2003 13:21:23 -0500
To: freebsd-isp@freebsd.org

    Shakespeare wrote plays and sonnets which will last an eternity,
    but on Tue, Nov 25, 2003 at 12:08 , Wm Brian McCane wrote:

    > Greetings,
    > This might no longer be a good place to ask this since so few of
    > us actually use modems anymore, but...

    > I am wondering which of the multiple serial port cards is best
    > supported/maintained in FreeBSD. I am also concerned with
    > expandability...

    > A customer with a server running about 20 dumb terminals plus
    > some PCs on a network, wants to put a box in a satellite office
    > to run 4 or 5 terminals and a printer. They also would like a
    > new report system and we are looking at setting up a box with
    > about 32 modems hanging off it's backside for faxing and dumping
    > directly to onsite modem/buffer/printer units.

    > So:
    > support for 8 upto 32 ports
    > well maintained driver
    > capable of sending 32 simultaneous 19200 or faster faxes
    > Not too worried about the price

    Given the way the world has changed - and having managed many
    multi-serial port devices in the far past, I think you'd be
    better served by a terminal-server - which gives you multiple
    RS-232 ports being connected to the OS by TCP/IP. Performance
    is much better than any serial boards I've seen in the past - with
    the exception of the Specialix RIO devices with on Inmos Transputer
    for very 8 serial ports. That could handle about 70 ports
    at 115Kb - and if you maxed it out with 128 serial ports
    you could sustain about 70Kb. But the damned wiring will kill you.

    I don't know what terminal servers are supported under BSD but IMO
    they are a better solution. And they are easy to remote if
    needed.

    Bill 

    -- 
Bill Vermillion - bv @ wjv . com
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  • Next message: Charles Swiger: "Re: start multiple sendmail daemons from rc.conf?"

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