whm@sri-unix (11/05/82)
We're having some problems with a VA3481 modem. We're using it with a VA821 dialer and VA831 converter. It is being used to dial out and we seem to be unable to connect with modems that do not support the 3400 protocol. A neighboring site has accquired several 3481's and they are having the same problem. Has anyone ever encountered similar problems? I have a creeping suspicion that the software is at fault, does anybody have Unix software that we could use to test our equipment with? Thanks in advance, Bill Mitchell
zemon@Berkeley@sri-unix (11/23/82)
From: randvax!trw-unix!trwspp!sentry1!zemon@Berkeley (Art Zemon (213-535-6166))
To: trwspp!trw-unix!randvax!ucbvax!menlo70!sytek!gi!arizona!whm@Berkeley
Cc: trwspp!trw-unix!randvax!ucbvax!unix-wizards@Berkeley
Uucp-Address: ...!ucbvax!randvax!trw-unix!trwspp!zemon
Via: Ucb-C70; 20 Nov 82 16:44-PST
Remailed-date: 22 Nov 1982 1833-PST
Remailed-from: the tty of Geoffrey S. Goodfellow <Geoff5 at SRI-CSL>
Remailed-to: Unix-Wizards@SRI-CSL: ;
Via: Sri-Csl; 23 Nov 82 0:23-PST
Date: Thursday, 18 Nov 1982 10:07-PST
Bill,
We had exactly the same problem with VA3481 modems and
VA821+VA831 autodialer/adapters. I am assuming that you
are *not* using the MACS chassis. The problem is not in
your software. Neither, as you might guess, is it in the
modem . The problem is a set of micro switches in the
autodialer!
The switches in the autodialer control when control of
the telephone line is passed from the dialer to the modem.
A pair of switches select one of the following:
1) when a Racal-Vadic carrier is detected,
2) when a non-Racal-Vadic carrier is detected, or
3) as soon as dialing is complete (do not even wait
for answer).
You want the third option if you will be calling both Vadic
and non-Vadic modems. Sorry, I don't remember which
micro-switches or the actual settings. Call me if you
don't have a manual and I'll look them up for you.
Good luck,
-- Art Z. =16730=