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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:
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