HP 24SII - Manual (Page 25)

Connect the proper serial cable between COMx (where x = 1, 2, 3, or
4) of a PC, or dumb terminal, to Port 1 of Module 1 (the master
configuration port). All other cables can be connected after the system
is configured (see
Section 8 ).
From the factory, the Model 24SII Data Exchange System is set up
with Port 1 of Module 1 (serial) designated as a computer port. Port 1
of Module 1 is the master configuration port and must always be a
serial port. Several parameter settings are set only through this port.
Port 2 of Module 1 (serial) is factory-designated as a printer port. All
other installed ports are factory-designated as computer ports. You
may designate in the configuration mode which ports are computer
ports and which are printer ports if required.
Other factory-default settings are:
Input Inactivity Timeout: 20 seconds
Port Select Code: $SELECT
Port Select Mode: Mode A (printer selection anytime while
printing).
Form Feed Mode: disabled
I.D. Page Message: disabled
Port Logical Name(s): set as Device A, Device B, etc.
Default Printer Assignment: 0 for all computer ports
(contention mode).