Configuring HP-UX For Peripherals

Chapter 4 125

Conﬁguring Terminals and Modems

Additionally Conﬁguring HP-UX for a Modem

documented on the inittab (4) manpage of the HP-UX Reference. For

example:

p5:234:respawn:/usr/sbin/getty -h -t 240 ttyd2p5 9600

• The p5 is a label used to uniquely identify the entry.

• This getty is executed when the system is in both run states 1 and 2.

• The respawn tells init to restart the process if it dies for any reason.

• The /usr/sbin/getty is the process used to open the port and

provide the initial login prompt.

• The -h option ensures that the getty will set the port speed before

resetting the port, which is crucial for the modem to work properly.

• The -t 240 is a security option to require that the user login name

and password is typed within 240 seconds.

• The ttyd2p5 is the device for modem port through which the getty

will receive incoming calls. (getty will complete the device name by

preﬁxing /dev to the port designation.)

• The 9600 does not represent the baud rate, but represents a label in

the /etc/gettydefs ﬁle. See gettydefs (4).

Step 9. After saving the ﬁle, invoke the following command to activate the

updated /etc/inittab ﬁle:

/sbin/init q

Step 10. To verify that getty is running on the port in a pending state, execute

ps-ef | grep ttyd2p5 (using the device ﬁle name for which the getty

was created). You should see a question mark in the tty ﬁeld.

Step 11. With modem still disconnected from the port, but powered on, the DTR

or TR light should be off. Connect the modem to its port. DTR or TR light

should come on. This veriﬁes that the port (not the modem) is setting

DTR or TR. If DTR or TR light remains on all the time, the modem has

DTR strapped high and setting should be changed. Check the modem

users' manual for procedure on how to change strapping.

Step 12. Execute another ps -ef

| grep ttyd2p5 command to verify that getty is stillin a pending state.

If getty has a port number in the tty ﬁeld instead of a question mark,

the modem has carrier detect (CD) strapped high. Check the modem