Return to BSD News archive
Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.mel.connect.com.au!news.mira.net.au!news.vbc.net!samba.rahul.net!rahul.net!a2i!news.walltech.com!news.his.com!news.akorn.net!gatech!news.mathworks.com!fu-berlin.de!irz401!orion.sax.de!uriah.heep!news From: j@uriah.heep.sax.de (J Wunsch) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: Setting up Dumb Terminal Date: 2 Sep 1996 07:33:48 GMT Organization: Private BSD site, Dresden Lines: 40 Message-ID: <50e2ks$lrs@uriah.heep.sax.de> References: <50cdfp$141@agate.berkeley.edu> Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) NNTP-Posting-Host: localhost.heep.sax.de Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Newsreader: knews 0.9.6 X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E chiuc@po.EECS.Berkeley.EDU (Chun-Yang Chiu) wrote: > tip to talk to the dumb terminal. A previous post indicated that > getty sleeps on DCD, and I think that could be my problem. However, > I dont know how to check whether my null modem cable carries the DCD > signal or not, and if it does, how to enable DCD in telix/telemate. > (The telix status bar always says "Offline"..is that related?) It's certainly related. :-) A proper null-modem cable looks like: TxD 2 ---\ /--- 2 TxD X RxD 3 ---/ \--- 3 RxD RTS 4 ---\ /--- 4 RTS X CTS 5 ---/ \--- 5 CTS DSR 6 -+ +- 6 DSR | | GND 7 -|-----|- 7 GND | | DCD 8 -*-\ /-*- 8 DCD X DTR 20 ---/ \--- 20 DTR The 20 <-> 6+8 crossover will generate DCD and DSR from the remote DTR, thus the pseudo-carrier will appear as soon as the modem indicates `ready'. Since the open tty port on the Unix side will also raise DTR, your Telix should get "online" seeing its own DCD signal. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)