From: utzoo!decvax!cca!knutsen@sri-unix Newsgroups: net.dcom Title: Re: Which modem should I choose? Article-I.D.: sri-unix.3003 Posted: Mon Aug 30 16:01:34 1982 Received: Wed Sep 8 03:21:57 1982 References: slinac.119 We used to have a vadic 300b autodialer, and recently got a ventel 212+. A few points: 1) An OS hack is not really necessary for modems which dont always raise carrier-detect. We just moved the pin on the plug on the modem end of the cord from pin 8 (CD) to pin 9 (+12). This did the trick. Actually our vadic had a mode which supposedly kept CD up, but it went down for about 1/2 second as carrier was acquired. Just long enough for unix to close the line. What would be best would be to have a short drop as carrier was lost. Anybody do this? 2) Our ventel does have dial tone detect. An ampersand ('&') in the number will wait for it. 3) My main complaint with the ventel is that it wont send the two non-numeric tones ('#' and '*'). Is there a modem that will? Our PBX uses these for billing. The ventel seems to be working pretty well now, tho the autobauding (it determines the speed from the tty line) sometimes screws up when machine-done and our PBX takes a long time to connect, resulting in occasional timeouts. We have uucp mods to allow returns and delays to be specified in L.sys, but I dont think even this is necessary, and we're standard otherwise. Btw, I had to add a line to L-devices for 1200 baud, so we have a "cul0" for 300 and a "cul1" for 1200. These are linked to the same file in /dev, but have different speeds in L-devices. Sending a return, delay, return to the dialer usually does the autobaud. Andrew