Path: utzoo!utgpu!watmath!att!dptg!rutgers!iuvax!mailrus!cornell!uw-beaver!rice!sun-spots-request
From: isaak!fischer@uunet.uu.net (Frank Fischer)
Newsgroups: comp.sys.sun
Subject: Handshaking problems Sun 3/50 <--> Micom PAD
Keywords: Hardware
Message-ID: <1026@brazos.Rice.edu>
Date: 21 Aug 89 15:48:31 GMT
Organization: Sun-Spots
Lines: 32
Approved: Sun-Spots@rice.edu
X-Sun-Spots-Digest: Volume 8, Issue 102, message 8 of 11

I want to connect a Sun 3/50 running SunOS 4.0.3 to a Micom PAD for dial
in and dial out on the same serial line.

The kernel is configured for hardware-handshake and modem-control.

There seems to be no configuration to match the handshaking between the
PAD and the Sun.

The only reasonable configuration for the PAD seems to be:

    -extended EIA controls  (call option)
    -dedicated  (channel option)

... but there is still a problem: the PAD raises DTR and RTS (would be ok)
    but also DCD without receiving a call.
    Result: -the getty thinks someone wants to log in ( DCD active)
	     and blocks the port.
	    -the PAD thinks someone wants to call out and doesn't accept
	     an incoming call.

Any suggestions to solve that problem ?

Thanks in advance.

---

  Frank Fischer

ISA GmbH  -  Informationssysteme fuer computerintegrierte Automatisierung
Azenbergstr. 35, D-7000 Stuttgart 1, West-Germany, Phone: +49-711/22769-0
UUCP: ...{uunet!unido, pyramid!iaoobel}!isaak!fischer or fischer@isaak.UUCP
BITNET: fischer%isaak.uucp@unido.bitnet