ACC X.25/ISDN Data Analyzer User's Guide

14 Chapter1

Overview

Data Analyzer Overview

The data analyzer is supplied with the A CC Base System product. It is a

software based tool that allows real-time capture and analysis of X.25

traffic on one or more X.25 links simultaneously. It also allows analysis

of ISDN traffic on the “D” channel s ignal and X.25 traffic on the “B”

channel. It runs within an HP-UX based HP 9000 system. Although the

data analyzer is designed to monitor X.25 or ISDN traffic from the ACC

products, it can be attached to any RS-232 or V.35 X.25 connections with

linespeedsupto1222Kb/s.

Each X.25 connection to be monitored on an 8-Channel HP-PB or EISA

card requires two ACC multiplexer ports, thus a single 8-channel ACC

multiplexercardcansupportuptofouranalyzersessions. Twoports

are required on the 8-channel PCI card only if a non-ACC X.25 link is

being monitored. The analyzercan provideup to 8 concurrent sessions by

using the ports on two or more 8-Channel ACC cards. For ISDN traffic

analysis, each connection requires only one sub-channel.

The Data Analyzer is composed of three major components:

• HDLC frame receiver multiplexer firmware

• HP-UX capture/filter daemon

• Display and analysis program

Figure 1-1 on page 15 shows the relationships between these

components, as well as the unique 'software-only' input configuration

with respect to the 4-Channel and 8-Channel PCI ACC products.

Configuration information is set up either in the ACC TTGEN

configuration file, or dynamically by means of the convenient runc

command.

Only one copy of the capture daemon runs in each HP 9000 system. It

handles all analyzer sessions. The control of these sessions comes from

one or more invocations of the Display program. The pdisplay program

is designed to work on any HP-UX TTY device. Several copies of the

pdisplay program can independently control several analyzer sessions

simultaneously, or one pdisplay program may control multiple sessions.