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- Path: darkstar.prodigy.com!davidsen
- From: davidsen@tmr.com (bill davidsen)
- Newsgroups: comp.dcom.modems
- Subject: Re: Sportster incoming call and Unix getty
- Date: 13 Mar 1996 21:40:46 GMT
- Organization: TMR Associates, Schenectady NY
- Message-ID: <4i7fcu$1huq@usenetw1.news.prodigy.com>
- References: <3145F1BC.794BDF32@miworld.net>
- NNTP-Posting-Host: darkstar.prodigy.com
- Originator: davidsen@darkstar.prodigy.com
-
- In article <3145F1BC.794BDF32@miworld.net>,
- Mitchell Perilstein <mperilstein@miworld.net> wrote:
- | Does anyone know what the external Sportster 28.8/33.6 does to inform
- | its host that a call is incoming?
- |
- | I would expect something on the CD line, but the modem seems to require
- | DTR in order to answer in the first place, kind of a chicken-egg
- | problem if you're trying to notify a Unix GETTY process.
-
- Yes, you want DTR high, then CD will come up as it should. When DTR
- is inactive the modem hangs up. Works on SunOS, AIX, Solaris, Linux,
- HP-UX, etc. Device drivers on every UNIX I've used in the last 20
- years have been able to handle this, I bet yours does, too.
-
- | I just swapped out a T2500 that worked fine like this.
-
- They run fine in a normal configuration, too.
-
- The only time you run with DTR down is when the modem is locked at
- fixed speed and you are waiting for a "RING" message from the modem.
- You need to enable that message, lock the speed, tell the getty the
- locked speed, and run a getty which looks for that.
-
- The only major getty which does this is mgetty (part of sendfax),
- although there are some other versions with fax packages which are
- documented to work this way.
- --
- -bill davidsen (davidsen@tmr.com)
- Behavioral scientists at Harvard University have proven that there
- are six things a man must do to keep a woman happy. They have also
- determined that no one has any idea what these things are.
-