Specifications

LBI-39100
13
the select and unselect Speaker Assemblies is front panel
labeling.
The Speaker Amp Board is mounted just behind the
speaker on long metal stand-offs fastened to the assemblies
front panel. It amplifies low-power speaker audio signals
from the Enhanced Audio Enclosure and drives the speaker
with the amplified signal. It can drive the speaker with up to
five (5) watts of audio power. The interconnect cable
between the Enhanced Audio Enclosure and the Speaker
Assembly delivers both 12 Vdc operating power and the
low-power speaker audio to the Speaker Amp Board.
CALL DIRECTOR PATCH
In addition to normal dispatch operations, the C3
Maestro console system can be connected to Call Director
(CD) telephone equipment. This feature allows the C3
Maestro to "patch" a telephone line to a specific unit, talk
group, conventional channel or radio patch in the CEC/IMC
network. See Figure 3.
The term patch or patched, derived from phone patch,
is used to convey the CD is connected to the CEC/IMC. A
Call Director patch should not be confused with a radio
patch in which a collection of radio talk groups are
interconnected for common communications as one group.
Radio patches include standard radio patches set-up at
consoles and Causeway patches (hard patches) set-up at the
CEC/IMC Manager (MOM PC).
Call Director patch operates independently of normal
console-to-radio dispatch communications. Using the CD
interface, the dispatcher is only required to connect the CD
with the target entity (unit, group, etc.). After this operation,
no other dispatcher intervention is required until the CD
patch must be disconnected.
Audio connections between the CD and the CEC/IMC
are accomplished by the Enhanced Audio Enclosure.
Microcontroller circuits on the Audio System Board have
primary control. The console's application program running
on the PC has minimal involvement in the control of CD
patch audio switching.
As with other telephone interconnect calls, CD patch
calls operate in the message trunked mode. From the
standpoint of the radio user, a CD patch operates identically
to any other telephone interconnect call.
The console uses a secondary LID (Logical ID) for the
patch channel requests, thus allowing CD patch operation to
work separately from, and concurrently with, the normal
console-to-radio dispatch communications. This LID is
referred to as the "Call Director ID".
OPERATING PROCEDURES
Refer to the C3 Maestro Training Manual LBI-38660
for complete C3 Maestro console operating details. This
manual includes User Training Study Guide ECR-4488 and
Administrators Training Manual ECR-4489.
INSTALLATION AND SET-UP
Refer to maintenance manual LBI-39101 for complete
console installation and set-up (configuration) information.
LBI-39101 is included with this manual set.
MAINTENANCE
Enhanced Audio Enclosure and Speaker Assembly
disassembly instructions follow. Refer to the appropriate
maintenance manual included with this manual set for
detailed board-level maintenance information. These
manuals include board outline and schematic diagrams, parts
lists and circuit analysis descriptions:
DISASSEMBLY INSTRUCTIONS
Enhanced Audio Enclosure
Disassemble an Enhanced Audio Enclosure in
accordance with the following instructions.
CALL
DIRECTOR
C3
MAESTRO
ENHANCE
D
AUDIO
E
NCLOSUR
E
CEC/IMC
Figure 3
−−
Basic Call Director Patch Audio Routing