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Introduction – Ericsson LBI-38965B User Manual

Page 5

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INTRODUCTION

LBI-38965

5

1. INTRODUCTION

This manual contains installation instructions, physical and functional descriptions, specifications, and usage

information for the Enhanced Digital Access Communications System (EDACS) Billing Correlation Unit and the
Centralized Activity Logger (BCU/CAL). A block diagram of the BCU/CAL is shown below.

The BCU/CAL works as a subsystem attached to an Ericsson Private Radio Systems (PRS) Integrated Multisite and

Console Controller (IMC) and can be set to operate as a BCU, a CAL, or both. Each IMC node must have its own
BCU/CAL.

BCU and CAL are two separate capabilities which can run independently of each other on the same machine, yet still

utilize resources and utilities common to both.

Additional information for BCU/CAL can be found in the following publication:

l

LBI-38967, EDACS Billing Correlation Unit/Centralized Activity Logger User Interface Manual

Figure 1 - BCU/CAL Architecture

Customer

Billing

Emulex

Terminal

Servers

Emulex

Terminal

Servers

DEC

Terminal

Servers

DEC

Terminal

Servers

16 RS-232

16 RS-232

DECNet

LAN

System

Manager

Computer

EDACS
Network
Manager

The dotted lines enclose the CAL-specific interfaces of the BCU/CAL.

Console
Terminal

High-Speed

HDLC Link

DAT (Optional)

TCP/IP WAN

BCU

RF

System

RF

System

Area

IMC

MIM

MIM

C

A

M

Downlink

Ethernet

CAL

RS-422