Configuring and Managing Host-Based X.25 Links - Edition 6 (36939-90057)

Introduction

Host-Based Network Connections

Chapter 1

Host-Based Network Connections

Many of the communications services available for HP 3000 Series 900 systems are

provided through the Datacommunications and Terminal Controller (DTC). There are

four types of DTCs currently supported: DTC 72MX, DTC 16iX, DTC 16MX and the DTC

16RX. The DTC 72MX, is the only currently supported DTC can support the DTC/X.25

Network Access cards that make communications over X.25 networks possible. The DTC

16iX, DTC 16MX and the DTC 16RX do not support the DTC/X.25 Network Access cards.

The DTC 72MX allows up to three connector cards, plus a LAN card. Up to three

DTC/X.25 Network Access cards are supported. Although the DTC 48 and DTC16 are

beyond their official support life references to these DTCs have been retained in this

manual for completeness because NMMGR and the DTS subsystem still allow these

DTC to be configured.

Figure 1-1 shows both PAD and X.25 system-to-system connections for HP 3000 series

900 systems employing host-based netwrok management.

Figure 1-1 X.25 Network Connections

X.25

Public

PAD

HP e3000

Series 900

HP e3000

900

HP e3000

Series 900

HP e3000

Series 900

X.25

DTC

Async

DTC

X.25

Location B

Location A

PAD terminals and Printer

PAD terminals

2335A

private

PAD