Troubleshooting Terminal, Printer, and Serial Device Connections - Edition 5 (32022-90058)

General Information
Datacommunications and Terminal Subsystem (DTS)
Chapter 1
20
10Base-T and 100 Base-T
Figure 1-3 shows the star topology of the 10/100 Base-T network and offers another way
to lay out your Ethernet network. 10/100 Base-T offers maximum connection lengths of
up to 200 meters of unshielded twisted pair per segment and supports up to 12
workstations per HUB. You can connect multiple HUBs to the LAN with an Ethernet
performance of 10 Mbps. The DTCs only support a connection at the 10 Base-T speed.
The hp e3000 system can be connected to a switch that will allow the System LAN to
operate using the 10 or 100 Base-T connections. The following diagram shows how to
connect the DTC and system through a switch to allow the system to operate at 10 or 100
Base-T speed. Hewlett-Packard recommends that the links be operated in half-duplex
mode.
Figure 1-3 10/100 Base-T Topology
ASC Software
The Asynchronous Serial Communications (ASC) software controls the DTS hardware. It
provides the interface between the IEEE 802.3 LAN and the MPE/iX operating system.
The software is included with the MPE/iX Fundamental Operating System (FOS).
The MPE/iX system tracks all of the devices connected to it by means of configuration
files. The network configuration information necessary to initialize and control the DTS
resides in a special configuration file. This file is created through the Node Management
Configuration Manager (NMMGR). Configuring Systems for Terminals, Printers, and
Other Serial Devices provides a detailed discussion of the configuration process.
HP e3000
Series 900
10/100 Switch
DTC 1
HP e3000
Series 900
DTC 2
10 Mb Half
Duplex
10 Mb Half
Duplex
10 or 100 Mb
Half Duplex
10 or 100 Mb
Half Duplex