From: utzoo!decvax!cca!mo@LBL-UNIX@sri-unix Newsgroups: net.unix-wizards Title: Re: Very Distant Host support under 4.1bsd Unix. Article-I.D.: sri-unix.3199 Posted: Fri Sep 10 01:08:17 1982 Received: Fri Sep 10 06:59:17 1982 From: mo at LBL-UNIX (Mike O'Dell [system]) Date: 8 Sep 1982 09:43:47-PDT With all due respect for the people that did the VDH back in the Dark Ages, the VDH is famous for not working very well. They have been the cause of premature retirement for more than one good ARPAnet software support person. There are persistant rumors that Greg Noel down at NOSC may be working on a VDH driver for 4.1a, but if he gives up, noone would blame him. The best thing to do, if your IMP must be remote from you, is to get a pair of ECU-II's from ACC. The Error Control Units connect to modems between the pair, and to the host, it looks like a local IMP interface, and to the IMP, it looks like a local host interface. ECU's are not perfect, and if you have a really rotten phone line between them, you will have grief, but not nearly as much as with a VDH. The other alternative would be to do an HDH driver, which would actually be doing the world a large service. But I am somewhat curious about your comment about "do I really need a C30?" If you don't have one, who does?? I have been assuming from your questions that you will be remote from some other IMP. Somewhere the must be an IMP HOST PORT to which your machine is attached. -Mike