Epson 4500 - Manual (Page 179)

The Interface Boards
Compatible Interfaces
The following is a list of Epson interfaces that are compatible with your
printer.
Interface number Name
#8143 New Serial Interface
#8148 Intelligent serial interface
#8165 Intelligent IEEE-488 interface
#8172 32 KB buffered parallel interface
All Epson interfaces have the Epson name printed on them. If the board
has an identification code printed on it, it is a four-digit number
beginning with 8 and should correspond to one of the numbers listed in
the table above.
Also, Coax and Twinax interfaces are available from third party
vendors. These interfaces allow connectivity to mainframes and
minicomputers and emulation of IBM printers. The Coax (EP-Connect)
is available from Avatar Corporation (508) 435-6872, and the Twinax
(I-O8300) is available from I-O Corporation (801) 973-6767.
Installation
1. Turn off your printer. Then unplug the printer and disconnect the
interface cable.
Using the Printer Options 5-41