Configuring and Managing Host-Based X.25 Links - Edition 5 (36939-90054)

26 Chapter2

Preparing to Conﬁgure DTCs

Plan the Network Conﬁguration

Before you use NMMGR to conﬁgure DTS (the DTCs and DTC

connections for your system), you must deﬁne the physical layout and

conﬁguration parameters for the computer, its DTCs, and all

DTC-connected devices.

Conﬁguration values that you must determine include a name for the

computer and a link name and physical path for the link between the

computer and its DTCs. You also need to associate a name with each

DTC and deﬁne the characteristics of the devices connected to each

DTC.

You must also deﬁne X.25 network values to be conﬁgured for each DTC

that contains a DTC/X.25 Network Access card. You can conﬁgure each

DTC/X.25 Network Access card to allow PAD device connections,

system-to-system X.25 connections, or both.

If you are conﬁguring PAD connections, you can also conﬁgure incoming

security. Security can be speciﬁed to either reject or accept incoming

calls from speciﬁc addresses. The Incoming PAD Security ﬂowchart

shown in Figure 2-1 describes how incoming PAD calls are processed to

allow or disallow access to the host-based MPE/iX system.

On the pages that follow, information and worksheets are provided to

help deﬁne these required conﬁguration parameters.

Incoming PAD Security

Figure 2-1 shows how incoming PAD calls are processed to allow or

disallow access to the host-based MPE/iX system.