GCC Printers 21 Series - Manual (Page 20)

17
RS-232 Serial Connection
The RS-232 Serial connection between the printer and a PC requires
a standard 9-pin RS-232 cable. The length of this cable can be up to
50 feet (15.4 meters). Serial connections are slower than parallel or
Ethernet connections, therefore the RS-232 connection is only
recommended for users who require a cable connection greater than
6.5 feet and do not have access to an Ethernet network.
Ethernet Network Connection
The Ethernet interface on your printer lets you connect to an Ethernet
network via standard 10 BaseT or 100 BaseT cabling.