Serial Interface

Serial Interface

The physical connection for the remote diagnostic interface is provided by an RS232-C serial interface.
The remote diagnostic port is accessed through a male DB9 connector.
Figure 24 lists the electrical pinout for this connector, which is the pinout for a null modem cable.
This interface is in conformance with the R5232-C electrical specification.
Parameters for the interface are:

•  Serial information transmitted at 19.2 K-baud
•  8 bits, no parity, 1 stop bit
•  VT1OO terminal emulation
•  XON/XOFF protocol, with a one-character maximum delay between receipt of XOFF and transmission halting
•  Character framing and translation OFF

Pin	Name	Tape Library Connection
1	DCD	Connected to Pins 4, 6
2	RXD	Data to Tape Library
3	TXD	Data from Tape Library
4	DTR	Connected to Pins 1, 6
5	GND	Logic Ground
6	DSR	Connected to Pins 1, 4
7	RTS	Connected to Pin 8
8	CTS	Connected to Pin 7
9	RI	No Connection