From: utzoo!decvax!ucbvax!helge Newsgroups: net.micro Title: Re: RS-232 Article-I.D.: ucbvax.9 Posted: Mon Mar 14 08:27:44 1983 Received: Fri Mar 18 01:41:06 1983 References: sri-arpa.554 teklabs.1796 My experience is that unless you want to use *really* long cables, there is no need for line drivers on rs232 lines. dz11's can drive at least 350m (>1000') of good cable without problems at 9600 baud. helge