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From: mroddy@enmasse.UUCP (Mark Roddy)
Newsgroups: net.dcom
Subject: autodial on synchronous modems
Message-ID: <413@enmasse.UUCP>
Date: Mon, 24-Jun-85 18:22:26 EDT
Article-I.D.: enmasse.413
Posted: Mon Jun 24 18:22:26 1985
Date-Received: Wed, 26-Jun-85 05:36:01 EDT
Distribution: net
Organization: Enmasse Computer Corp., Acton, Mass.
Lines: 38

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I'm faced with a design question on implementing autodial for low speed
synch modems (i.e. 4800 bps.) 
	
	The only synchronous modem I've got a spec for is a UDS 4800 model.
	Dialout is accomplished by:
		1) driving pin 12 high;
		2) driving DTR high;
		3) waiting a specified time;
		4) raising pin 25 high for 3.5 seconds;
		5) providing high and low pulses on pin 25 corresponding to bell
		standard pulse dial signals.

The questions are:
	
	1) does anyone manufacture synchronous modems with some analogy  to the
	Hayes protocol for async dial out?

	2) Is UDS's method done by anyone else? (i.e. is this a standard?)

	3) If the answer to question 2 is no, then is there a standard?

	4) If the answer to 2 and 3 is no, then what dialout interface do
	other netlanders provide for their intelligent comm boards?

	5) In fact, even if the answer to 2 or 3 is yes, I'd be interested
	in knowing how other people provide autodial for comm. boards.

	Please send mail, if there is interest I will post a summary of responses
	to the net.

	Thanks.
-- 
						Mark Roddy
						Net working,
						Just reading the news.

					(harvard!talcott!panda!enmasse!mroddy)