IIGS MODEM PORT

[paul.parkhurst@uttsbbs.uucp (Paul Parkhurst)]

-> Can anyone give out the pin connections for an IIGS modem port.  Can
-> this port be used with a 'standard' hayes (yes an actual hayes)
-> modem? If so which is a good comm program to get to use with it? Any
-> and all help appreciated.
->
-> Thanks
-> Jim B.

   As someone mentioned, a standard "Mac to Hayes" cable should work
just fine for any low-speed modems (I'm assuming you're talking about a
Hayes Smartmodem 1200/2400).  If you get a high-speed modem, you'll need
a cable that supports handshaking.

   As for the pinouts of such a cable:

          GS Modem Port                    Modem
        (Male Mini DIN-8)               (Male DB-25)
        ==============================================
        1 (DTR)      ------------ 20 (DTR) and 4 (RTS)
        2 (HSKI)     ------------------------- 8 (DCD)
        3 (TX Data-) ------------------------- 2 (TX)
        4 (GND)      ------------------------- 7 (GND)
        5 (RX Data-) ------------------------- 3 (RX)
       *7 (DCD/GPI)  ------------------------- 5 (CTS)

* This line is optional.  If you use it, you can get handshaking with
any software that uses the GS firmware by setting "DCD Handshaking" to
"Yes" in the control panel.

   Pin-outs for the new handshake cable that packages like Proterm uses
is as follows:

          GS Modem Port                     Modem
        (Male Mini DIN-8)               (Male DB-25)
        ==============================================
        1 (DTR)      ------------ 20 (DTR) and 4 (RTS)
        2 (HSKI)     ------------------------- 5 (CTS)
        3 (TX Data-) ------------------------- 2 (TX)
        4 (GND)      ------------------------- 7 (GND)
        5 (RX Data-) ------------------------- 3 (RX)
        7 (DCD/GPI)  ------------------------- 8 (DCD)

   This new design departs from the tradition of using the DSR line for
carrier detect.  It uses pin 7 (not supported on some older Macs) for
carrier detect, and the DSR line for handshaking.

   As for which telecom program to get, I'm the wrong person to ask!
I'm prejudiced since I have one on the market.  I sell ANSITerm, which
might be something you'd want to look into.  Proterm is the current big
seller, however.  If you want information on ANSITerm, you can give me a
call at (510) 837-9098.


Paul Parkhurst

uttsbbs!paul.parkhurst@PacBell.COM
                                                                                            
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