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3.3. CAL OPERATIONAL SPECIFICATIONS
This section outlines the specifications that are unique to the CAL personality. Refer to Figure 4 for the CAL
architecture.
3.3.1. System Manager Interface
The CAL interfaces to the System Manager's DECServer(s) via one or two terminal servers capable of supporting up to
32 independent asynchronous RS-232 serial connections. The ports on the CAL's terminal servers are connected to the ports
on the System Manager's DECServers via RS-232 cables.
3.3.2. Protocol Supported
The CAL is capable of communicating with the System Manager using the System Manager-to-Site Controller (SM-SC)
and Site Controller-to-System Manager (SC-SM) protocol defined in EDACS Protocol Specification, System Manager/Site
Controller Version 1.1.
Figure 4 - CAL Architecture
High-Speed HDLC
Link (RS-422)
RF
System RF
System

Area

IMC

MIM MIM
CAM

Centralized

Activity

Logger

(CAL)

RS-232
CAL Console Terminal
TCP/IP
LAN
Emulex
Terminal S e rv e rs 16 RS-232
DEC
Terminal Servers
Emulex
Terminal S e rv e rs 16 RS-232
DEC
Terminal Serv ers
System
Manager
DECNet
LAN