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From: taylort@decus.com.au (Trevor Taylor (Graphics SIG Chairman))
Newsgroups: comp.os.vms,comp.dcom.modems
Subject: Re: How to change modem polling timing of VMS
Message-ID: <350@decus.com.au>
Date: 13 Oct 88 15:18:29 GMT
References: <2484@tansei.cc.u-tokyo.JUNET>
Organization: DECUS, Australian Chapter
Lines: 21

In article <2484@tansei.cc.u-tokyo.JUNET>, c31293@tansei.cc.u-tokyo.JUNET (Kenji Rikitake) writes:

> VMS polls each modems by setting DTR 30 seconds ON and 5 seconds OFF
> periodically. And this causes a trouble. I'm using Hayes-compatible
> modems as frontends, and I set them to reset when DTRs drop off.
> And I recently found it disconnected incoming calls very often,
> since VMS turns off DTR whatever modems are doing. <sigh>

I don't believe this should happen if the modem is set up correctly as
well as the terminal port. We use a setting of TTY_DIALTYPE = 1 in
SYSGEN which is required for Europe, UK, Australia, etc., and I don't
think it drops DTR for as long as 5 seconds, only one second. Still,
any dropping of DTR is probably too much ...


> Does anyone know how to make the polling cycle longer?

The SYSGEN parameter TTY_SCANDELTA determines the polling interval.


	Trevor