HP Visualize J200 Reference Manual page 7

Network Interface
The J Class has built–in ThickNet LAN AUI and TP (Twisted Pair) connectors for the 802.3
(ETHERNET) network. Connections to ThinLAN networks require an external transceiver. Your
workstation will autoselect the correct network setting.
The IEEE 802.3 Ethernet Local Area Network (LAN) circuit provides both the AUI interface for
conventional coaxial Ethernet and a direct interface to a twisted pair (TP) 10BASE–T network. Only one
built–in interface can be used at a time. The system auto–selects the correct port that is being used.
Ethernet is a 10 Mbit/s packet–switched serial interface employing Carrier Sense Multiple
Access/Collision Detection (CSMA/CD). Table 1–3 lists the supported LAN adapters and other network
devices.
Table 1–3. Supported AUI LAN Adapters and Devices
LAN Adaptor
HP 28641B ThinLAN Transceiver
HP 30241A 10Base4 ThickLAN MAU
RS–232 Serial I/O Interfaces
The RS–232 Serial I/O (SIO) ports on the J Class accept a variety of pointing devices or peripheral
devices. Peripheral devices include printers, plotters, modems, and scanners. Consult the documentation
that accompanies each peripheral device for specific information concerning its use.
The SIO ports are programmable, allowing the setting of such functions as bit rate, character length,
parity, and stop bits. SIO Ports are used as interfaces for serial asynchronous devices to the CPU. The
ports operate at up to a 19.2 K baud rate.
Table 1–4 shows the SIO connector pin listings. The serial connectors are 9–pin D–sub connectors.
Signal names are those specified in the EIA RS–232 standard.
Table 1–4. Serial I/O Pins
Pin No. Signal Description
1 DCD Data Carrier Detect
2 RXD Receive Data
3 TXD Transmit Data
4 DTR Data Terminal Ready
5 GND Ground
6 DSR Data Set Ready
7 RTS Request To Send
8 CTS Clear To Send
9 RI Ring Indicator
Network Devices
HP 28692A ThinLAN Hub Plus
HP 28673A 10:10 LAN Bridge
HP 28683A Fiber Optic Transceiver