Subject: Re: PPP & Modem Lockups
To: None <port-i386@NetBSD.ORG>
From: Ernst J. du Toit <firstname.lastname@example.org>
Date: 03/07/1995 19:24:10
> Has anyone else seen modem problems after failed ppp connection
> attempts? I have an internal Cardinal v.32bis fax/modem and
> occasionally after a failed attempt the modem stops responding to
> input completely. The system otherwise operates normally. It seems
> that the hardware is going into an odd state since nothing less than
> a hard reset reset returns the modem to responsiveness. It could
> very well be specific to my modem, but I thought I'd ask anyway.
> Gary D. Duzan
> Humble Practitioner of the Computer Arts
I had similar problems with a Rockwell chipset based internal MODEM.
I traced the 'lockup' (kermit would fuzz out too if I tried getting to the
MODEM) to the fact that I had NO DTR control. This was with
'Luckly' my MODEM would die and keep the line open, so I programmed the
MODEMs internal timer to drop after 3mins of no traffic - this works since
getty doesn't (can't?) toggle DTR when cycling. Doing a DTR toggle (from
another operating system :-) forces the timer off, so am happy about the
silly DTR behavoir.
Before I discovered that I had to shutdown and RESET the box to get the
MODEM to kick - which means driving in from home, not funny :-(
Your mileage me wary...
Ernst J. du Toit (TED5) Internet: email@example.com
School of Electrical Engineering BELTEL : 175250 / Amateur Radio: ZR1ABB
Cape Technikon Voice: +27 21 460 3911 / Fax: +27 21 45 4161
South Africa /* Hackers do it with bytes and nybbles ! */