Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!usenet.ins.cwru.edu!ncoast!allbery From: allbery@NCoast.ORG (Brandon S. Allbery KB8JRR) Newsgroups: comp.sys.mac.comm Subject: Re: ZTerm, Telebit T1000, and flow control Message-ID: <1991Jan4.031124.13353@NCoast.ORG> Date: 4 Jan 91 03:11:24 GMT References: Reply-To: allbery@ncoast.ORG (Brandon S. Allbery KB8JRR) Followup-To: comp.sys.mac.comm Distribution: comp Organization: North Coast Computer Resources (ncoast) Lines: 31 As quoted from by yee@osf.org (Michael K. Yee): +--------------- | Using the combination above, what is the best/fastest setup for flow | control? Currently I use the MNP/Enhanced mode on the Telebit @ | 9600 baud. I set flow control to XON and XOFF. | | The question is - Can I use hardware flow control (there are two | levels on available on the Telebit)? Or since the MNP/Fast | connection is suppose to be error free, should I just turn off flow | control? +--------------- I've had no trouble with the T1000 at 9600 baud with no flow control on a Mac SE. I don't think you can do hardware flow control, though. (I may be wrong about that, but I seem to remember something about it only working with RS422. Then again, the Mac isn't the only computer I use that uses the same physical port for both RS232C and RS422, so I may be completely confused. ;-) You should NOT use XON/XOFF flow control for file transfers: Xmodem & Co., Kermit, UUCP (there is at least one version for the Mac), etc. expect transparent communications lines, so software flow control is out. But note that if you use no flow control, the T1000 will retransmit packets to the computer in the case of an overrun until all packets are acked. (That's a fringe benefit of the "protocol spoofing".) ++Brandon -- Me: Brandon S. Allbery VHF/UHF: KB8JRR on 220, 2m, 440 Internet: allbery@NCoast.ORG Packet: KB8JRR @ WA8BXN America OnLine: KB8JRR AMPR: KB8JRR.AmPR.ORG [44.70.4.88] uunet!usenet.ins.cwru.edu!ncoast!allbery Delphi: ALLBERY