Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!uakari.primate.wisc.edu!samsung!usc!ucsd!ucsdhub!hp-sdd!hplabs!hpfcso!hpfcmgw!rodc From: rodc@hpfcmgw.HP.COM (Rod Cerkoney) Newsgroups: comp.sys.hp Subject: Re: serial port on HP9000/360 Message-ID: <1080106@hpfcmgw.HP.COM> Date: 14 Dec 89 17:02:10 GMT References: <1989Dec12.220931.24207@iex.uucp> Organization: HP Fort Collins, CO Lines: 18 1 - DTR: data terminal ready 2 - TXD: transmitted data 3 - RXD: received data 4 - RTS: request to send 5 - CTS: clear to send 6 - DSR: carrier detect 7 - GND: signal ground 8 - CD: carrier detect 9 - RI: ring indicator Hope this helps. By the way I couldn't find this in any manual either. I had to look it up in some internal notes that I have. I'll call this to the attention of the proper documentation specialist(s).