Sun 3/80 + Hayes modem problem

[Dave Pascoe]

We've had a Sun 3/80 (running SunOS 4.0.3) linking up with a UUCP neighbor
for many months with no problems to speak of.  We use a 2400 baud Hayes modem
hooked up to the cua0 port.

A few days ago, for some strange reason that I haven't been able to trace,
the communication between the Sun and the modem got screwed up.  I can still
go in and use "tip maint" to send modem commands but I can't dial out using 
the ATDT dialing commands.  I get the error "can't synchronize with hayes" and
ocaasionally get an "all ports busy" message from the Sun.  To my knowledge,
the /etc/remote file has not been changed (I compared it with an earlier 
version).  We have tried fastbooting the Sun with no change.  Previously the
AA (auto-answer) LED on the modem was lit up but it isn't any more.  I have
tried resetting the modem to its original internal settings, as well as power
cycling it, all to no avail. 
 
I also tried removing any strange lock files but could find only one (can't
remember the file name) and I removed it.

Any ideas?  Please e-mail as I don't read these groups often.


contents of /etc/remote:
-----
cua1:dv=/dev/cua1:br#1200
dialup1|Dial-up system:\
        :pn=2015551212%:tc=UNIX-1200:
hardwire:\
        :dv=/dev/ttyb:br#9600:el=^C^S^Q^U^D:ie=%$:oe=^D:
tip0|tip1200:tc=UNIX-1200:
tip300:tc=UNIX-300:
cu0|cu300:tc=UNIX-300:
cu1200:tc=UNIX-1200:
UNIX-300:\
        :el=^D^U^C^S^Q^O@:du:at=ventel:ie=#$%:oe=^D:br#300:tc=dialers:
UNIX-1200:\
        :el=^D^U^C^S^Q^O@:du:at=ventel:ie=#$%:oe=^D:br#1200:tc=dialers:
VMS-300|TOPS20-300:\
        :el=^Z^U^C^S^Q^O:du:at=ventel:ie=$@:oe=^Z:br#300:tc=dialers:
VMS-1200|TOPS20-1200:\
        :el=^Z^U^C^S^Q^O:du:at=ventel:ie=$@:oe=^Z:br#1200:tc=dialers:
choke:el=^C^D^S^Q^U:br#9600:dv=/dev/ttya:pn=:
jjmhome:br#2400:pblahblahblah:tc=edcd-sun:
wpi1:br#2400:pblahblahblah:tc=edcd-sun:
wpi2:br#2400:pblahblahblah:tc=edcd-sun:
wpi3:br#2400:pblahblahblah:tc=edcd-sun:
wpi4:br#2400:pn=blahblahblah:tc=edcd-sun:
bunny:br#2400:pn=blahblahblah:tc=edcd-sun:
edcd1:br#1200:pn=blahblahblah:tc=edcd-sun:
edcd:br#2400:pn=blahblahblah:tc=edcd-sun:
edcd-sun:at=hayes:du:dv=/dev/cua0:el=^C^D^S^Q^U::pa=none:
tops:br#2400:pn=blahblahblah:tc=edcd-sun:
maint:br#2400:dv=/dev/cua0:el=^C^D^S^Q^U::pa=none:
dialers:\
        :dv=/dev/cua2,/dev/cua1:\
-------

-- 
Dave Pascoe | Internet: km3t at jjmhome.m2c.org 
KM3T        | UUCP: km3t at jjmhome.UUCP