Xerox 4520 User Manual page 234

C a b l e S p e c i f i c a t i o n s
RS-232C Serial
Interface (CCITT
V.24)
A-8 4 5 2 0 / 4 5 2 0 m p U s e r ' s G u i d e
The RS-232C Serial Interface complies with the EIA 232C
standard which defines the interconnect of Data Terminal
Equipment (DTE) and Data Communication Equipment
(DCE).
Data Rates
The user may select line speeds of 300, 600, 1200, 2400, 4800,
9600, 19200 and 38400 baud. Default setting is for 9600 baud.
Encoding
Asynchronous communication in the printers supports 7 or
8-bit ASCII data. The string of data bits is encapsulated by 1
Start bit, 1 or 2 Stop bits and may have an appended Parity
bit. Parity (even, odd or none), the number of stop bits and 7
or 8 bit data are selectable from the front panel UI. Default
settings are for 8 bit data with 1 stop bit and parity none.
Protocols
Character protocols are used to regulate the flow of
information between machine and host. The software
handshaking protocol of XON/XOFF, Robust XON/XOFF,
and DTR Polarity are available – DTR provides the hardware
handshaking. The default setting is for Robust XON/XOFF.
Connections
The connector for the RS-232 interface is the 25 pin "D" Shell
type. The use of short cables for interconnect is
recommended. Cable length has been certified at 4 feet.