Path: utzoo!utgpu!cunews!bnrgate!brtph3!brchh104!brchs1!bnr.ca!rice!sun-spots-request
From: devil@TECHUNIX.BITNET
Newsgroups: comp.sys.sun
Subject: Re: Does the SLC serial port (s) have modem control?
Keywords: Hardware
Message-ID: <304@brchh104.bnr.ca>
Date: 19 Nov 90 01:00:00 GMT
Sender: news@brchh104.bnr.ca
Organization: Sun-Spots
Lines: 51
Approved: Sun-Spots@rice.edu
X-Original-Date: 5 Nov 90 19:40:32 GMT
X-Refs:  Original: v9n357
X-Sun-Spots-Digest: Volume 9, Issue 368, message 3
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In article <1990Nov4.030825.2169@rice.edu> freedman@euclid.math.temple.edu (Avi
Freedman) writes:

>Since sun sales dweeboids are notoriously unreliable, I figured that I'd
>check with the net.  Are there any problems hanging a Tbit 2500 off of an
>SLC?  I heard in a press release that they had strange serial ports or
>something, and it is important that I can run uucp over the tbit.

No problem for the first serial port, it is completely standard.  In fact,
I am writing this thorugh a Tbit 2500 connected to an SLC, so I guess that
proves it.

I got the pin out for the second serial port off the net, and that one
does not have DTR/DSR lines. This makes it bad for use with modems, unless
you want to do software control of hangups, and don't mind not detecting
them...

The following is a part of an old mesasge from comp.sys.sun.  I forgot who
the original proster was, But Thanks! I tested the pin-out below, and it
works for both ports.

Wire these pins straight through for the A port:

        SLC     use                     A port
        1       protective ground       1
        2       TD (transmitted data)   2
        3       RD (received data)      3
        4       RTS                     4
        5       CTS                     5
        6       DSR                     6
        7       signal ground           7
        8       DCD                     8
        20      DTR                     20
        22      RI                      22

Wire these pins to the B port:

        SLC     use                     B port
        1       protective ground       1
        7       signal ground           7
        13      secondary CTS           5
        14      secondary TD            2
        16      secondary RD            3
        19      secondary RTS           4

Note that pins 1 and 7 are common to both ports.

End included message.

| Gil Tene                      "Some days it just doesn't pay     |
| devil@techunix.technion.ac.il   to go to sleep in the morning."  |