Path: utzoo!utgpu!water!watmath!onfcanim!dave
From: dave@onfcanim.UUCP (Dave Martindale)
Newsgroups: comp.dcom.modems
Subject: Re: Trailblazer, flow control, DMF32
Keywords: telebit trailblazer emulex 19200
Message-ID: <15547@onfcanim.UUCP>
Date: 14 Feb 88 19:00:34 GMT
References: <272@coherent.uucp> <3249@cbmvax.UUCP> <10433@mimsy.UUCP> <14856@oliveb.olivetti.com> <3313@cbmvax.UUCP>
Reply-To: dave@onfcanim.UUCP (Dave Martindale)
Distribution: comp
Organization: National Film Board / Office national du film, Montreal
Lines: 17

I've written a Telebit driver for 4.3BSD uucico.  After opening the line,
it does:

	for (i = 3; i > 0; i--) {
		sendthem("A\\dA\\dA\\dA\\dT", dh);
		if (expect("OK\r\n", dh) == 0)
			break;
	}

The string originally contained only three A's, and would sometimes fail
to autobaud the modem the first try, working on the second.  After I added
the fourth A, I've never seen this fail (but I have no 300-bps connections,
just 1200, 2400, and PEP).

Once the loop above has received the OK that positively acknowledges that
the modem is listening, configuration and dialing commands sent at 19200
work fine.