Specifications

LBI-39062
5
INTRODUCTION
The EDACS
®
C3 Maestro console system is a state-of-
the-art CRT-based dispatch console system designed to
interface to an EDACS
®
CEC/IMC Digital Audio Switch.
It provides enhanced console dispatch features on a PC-
AT™ computer platform. A standard C3 Maestro console
system consists of:
• an IBM
®
PC-AT compatible Personal Computer
(PC) system running MS-DOS software and
custom C3 Maestro application software, a color
video display monitor ("CRT") and a standard PC
keyboard
• a Dispatch Keyboard typically referred to as the
"Custom Keyboard"
• a specialized Logic Board installed in one of the
PC's internal expansion slots
• a specialized Audio Tower which provides audio
conditioning, routing and amplification functions
• a Volume Controller Box for the speakers
• a set of speakers (typically two)
• other accessories such as headsets, microphones
and footswitches
The Audio Tower consists of:
• a case assembly
• a power supply
• Backplane and Spreader Boards
• one Audio PA Board (2-speaker system) or two
Audio PA Boards (3- or 4-speaker system or if
interfaced to a Call Director for Call Director
patch operations)
• an Audio Matrix Board
• an I/O Board
The C3 Maestro console's video display monitor
("CRT") and keyboard replace the array of controls and
indicators found on traditional modular/desktop-type
consoles. Standard headsets, microphones, footswitches and
speakers can be connected to the C3 Maestro. Also, a
variety of other external inputs and outputs are supported.
NOTE
Refer to LBI-38662 for a complete description of
the EDACS CEC/IMC Digital Audio Switch.
DESCRIPTION
Using the C3 Maestro console, a dispatcher can
monitor and communicate with a large number of
personnel on the EDACS CEC/IMC network. A typical C3
Maestro console installation is shown in the Outline
Diagram drawing in this manual (page 12).
The PC's video display monitor displays graphical
representations of the radio links which are currently being
controlled by the dispatcher. Using the Dispatch Keyboard
("Custom Keyboard"), a dispatcher can issue commands to
control receive and transmit audio signal routing between
the CEC/IMC and audio devices connected to the C3
Maestro such as microphones and speakers. These keyboard
commands are sent to the PC. Software running on the PC
in-turn controls audio matrix switching circuitry inside the
Audio Tower via the Logic Board and the related
interconnect cable.
PERSONAL COMPUTER
The PC within the C3 Maestro console system provides
all computer processing functions for the console. Software
includes the Microsoft's MS-DOS operation system and a
custom C3 Maestro application program developed by
Ericsson GE. This custom program automatically starts
when the computer is "booted". PC components also
include the video display monitor ("CRT") and a standard
PC keyboard.
Video Display Monitor ("CRT")
The PC's video display monitor provides all visual
dispatch control indications to the operating dispatcher.
This color monitor is typically of a VGA or super-VGA
resolution. Basic screen layout is shown in Figure 1. Screen
areas include:
• Module Display Area − Fourteen (14)
communication modules are displayed at all times
in the upper portion of the screen. Each module
provides instant communication access to a talk
group, an individual unit, a conventional channel,
or another console. Eight (8) pages of fourteen
(14) modules are available for a total of 112
unique communication modules. Each module can
be programmed by the console operator.
• Module Page Area − This area, located in the top
right-hand side of the screen, indicates which one
of the eight (8) module pages is displayed. When a
call is received on a non-displayed page, the
respective page indicator is high-lighted in yellow.
If an emergency call is received on a non-