goose@surf.sics.bu.oz (Ralph Schwarten) (10/23/90)
Hi out there !
I am sure that this has been thrashed around before.. unfortunately I
didn't pay any attention then :-(
My problem is this:
I have a 1200 bd modem on ttyb(serial port b not using /dev/ttyb).
In /etc/ttys I run getty on that port in the following manner
ttydb "/usr/etc/getty d1200" dialup on secure
I am using an apple serial cable (it has a printer icon on it)
As sson as i kill -1 1 getty forks a login process on ttydb.
A ps -ax shows the login process on that port with garbage as it's args.
The td and rd light on the modem flash like crazy, stop then start again
as soon as the login process dies and getty establishs itself again.
Apparently, based on the zs manual entry, ttyd{a,b} is meant to block
wait dcd on the modem so that it only forks a login when the modem is
actually connected to the remote. Either ttyd{a,b} is not block
waiting, or the modem's dcd is always high ?
I have tried making a cable from scratch using the pin-outs as specified
in the zs man page, although I did not jump 4,8 -->20.
The modem works fine if I turn getty of for that port and use tip or cu.
So that is my problem.. a frustrating one indeed !
I have not tried a different modem, nor have I tried this modem on the
Sun which we have. Although under Microphone II on a mac with the same
two cables, we set the software to "wait for call" and everything is
sweet.
Any hints or solutons to this would be greatly appreciated.
Thanks in advance
Ralph Schwarten
Computing and Information Technology
Bond University
Gold Coast
Queensland
Australia
e-mail/internet: goose@hal.nmg.bu.oz.au