GCC Printers 21 Series - Manual (Page 10)

7
Connectivity Ports
With the printer’s all
ports active feature,
all the interfaces are
simultaneously active.
This means you can
connect more than
one interface at a
time. You don’t have
to select a port; this
feature works
automatically.
Ethernet 10/100BaseT
Bi-directional Parallel
Universal Serial Bus (USB)
RS-232 Serial