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

34 Chapter2

Preparing to Conﬁgure DTCs

Determine X.25 Connection Characteristics

You must deﬁne characteristics for the X.25 PAD or system-to-system

connections you are conﬁguring. Values need to be conﬁgured for each

DTC/X.25 Network Access card mounted in the DTCs for the system

you are conﬁguring.

Whether you are conﬁguring system-to-system, PAD connections, or

both, you will need to deﬁne values for levels 1, 2, and 3 of the X.25

network. Most of these values are deﬁned by your X.25 network

subscription and you can transfer these values directly to the DTC X.25

Card Conﬁguration — Level 1 and 2 Worksheet shown later in this

Chapter, and the DTC X.25 Card Conﬁguration — Level 3 and

Miscellaneous Worksheet shown later in this Chapter.

If you are conﬁguring system-to-system connections for an X.25

network, you will need to deﬁne an X.25 link name, the maximum

number of SVCs, and remote X.25 addresses and security designations.

Once you have decided on your system-to-system conﬁguration, you can

use the DTC X.25 Card Conﬁguration — System-to-System Worksheet

shown later in this Chapter.

If you are conﬁguring nailed PAD connections, you can use the DTC

X.25 Card Conﬁguration — Nailed PAD Connections Worksheet shown

later in this Chapter.

If you are deﬁning nailed PAD connections, you may also wish to

conﬁgure security. To do so, you list remote X.25 calling addresses and

specify whether you want all calls from the listed addresses to be

blocked, or all calls from the listed addresses (and only the listed

addresses) to be accepted. Once you have decided on the security to be

conﬁgured, use the DTC X.25 Card Conﬁguration — PAD Security

Worksheet shown later in this Chapter, to list the remote X.25

addresses.