Using the ttyb serial port on a V240

I am trying to connect a terminal to a V240 via the ttyb (10101) port, the port directly above the "Serial Mgmt" port.

I added the following line to the /etc/inittab file:

c1:234:respawn:/usr/lib/saf/ttymon -g -h -p "`uname -n` login: " -T sun -d /dev/ttyb -l console -m ldterm,ttcompat

The ttymon process showed up soon afterward:

unixsrv3# ps -ef | grep ttymon

root 26551 0 12:34:31 term/b0:00 /usr/lib/saf/ttymon -g -h -p unixsrv3 login: -T sun -d /dev/ttyb -l console -m

and pmadm shows the port monitor:

unixsrv3# pmadm -l

PMTAG PMTYPE SVCTAG FLGS ID<PMSPECIFIC>

zsmon ttymon ttyauroot/dev/term/a I - /usr/bin/login - 9600 ldterm,ttcompat ttya login: - tvi925 y #

zsmon ttymon ttyburoot/dev/term/b I - /usr/bin/login - 9600 ldterm,ttcompat ttyb login: - tvi925 y #

But when I connect either a dumb terminal or a PC based terminal emulator to the port, I get nothing... no login prompt. Dead silence. I tried both straight through and null modem cables, and neither worked. The null modem cable worked fine on the SerialMGMT port (ttya).

Any help is greatly appreciated!

[1159 byte] By [truly64] at [2007-11-26 11:20:36]
# 1
One thing that helps me when messing with serial cabling and port settings is that, even with ttymon running, you should be able to "cat > /dev/ttyb" and see stuff on the terminal. If you don't see anything, you almost certainly still have some work to do on cabling, settings,
wsanders at 2007-7-7 3:36:03 > top of Java-index,Sun Hardware,Servers - General Discussion...