Path: utzoo!utgpu!watserv1!watmath!att!pacbell!pacbell.com!mips!zaphod.mps.ohio-state.edu!samsung!uunet!saxony!dgil
From: dgil@pa.reuter.COM (Dave Gillett)
Newsgroups: comp.dcom.modems
Subject: Re: Invisible modems ?
Keywords: Modem RS232 UNIX Sun
Message-ID: <364@saxony.pa.reuter.COM>
Date: 2 Sep 90 09:06:24 GMT
References: <1909@jura.tcom.stc.co.uk>
Organization: Reuter:file Inc  (A Reuter Company) Palo Alto, CA
Lines: 13

In <1909@jura.tcom.stc.co.uk> rajesh@tcom.stc.co.uk (Rajesh Kirpalani) writes:
>      On the Sun I am using the command :-
>           ( stty 2400 ; echo ATD number ) > /dev/ttya

I'd suspect that "echo" may be providing a line-feed, in addition to or in place
of the carriage-return expected by the modem.  I remember encountering a similar
problem with the MS-DOS "echo" command, which was fixed by putting the necessary
text into a file and copying ("cat"?) to the device instead of using echo.

You probably also want to put a delay in your procedure, to allow the dialing to
take place and the line to stabilize before the application tries to use it--and
remember to flush out the modem responses, too.
                                                  Dave