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LBI-39055
16
PA Board(s). See Table 9 for details. All relay connections
are isolated from ground.
"RELAY 1" contacts at the I/O Board close when the
console is keyed (PTTed). Audio PA Board #1 "RELAY 1"
contacts toggle open/closed at an <Alt><F9> keystroke
from the dispatcher keyboard and the RELAY 2 contacts
close (momentarily action) while <Alt><F10> is depressed
at the dispatcher keyboard. The other relays are not
supported by software.
TABLE 9 −− RELAY CONNECTIONS
BOARD
TERMINAL
BLOCK
LABELING
SCREW
TERMIN-
ALS
ACTIVATION
METHOD
I/O
RELAY 1
upper two console PTT
I/O
RELAY 2
lower two not supported
Audio PA #1
RELAY 1
upper two <Alt><F9>
Audio PA #1
RELAY 2
lower two <Alt><F10>
Audio PA #2
RELAY 1
upper two not supported
Audio PA #2
RELAY 2
lower two not supported
Call Director (if equipped)
As shown in Figure 1, all C3 Maestro-to-Call Director
interconnections at the console are made at the Audio
Tower's I/O Board. Call Director telephone patch also
requires a second Audio PA Board (#2) in the Audio Tower
and a 4-wire balanced line between this board and the
console’s CIM within the CEC/IMC. At the CEC/IMC,
CIM audio channel/line four (4) is used for Call Director
interfacing. CD control data interfacing is handled over the
existing RS-232/RS-422 serial control data interface
between the PC and the CEC/IMC. Refer to Figures 1, 7, 8
and 12 for Call Director interconnection details.
Console-to-CEC/IMC Audio Interconnections
All audio in to and out of a C3 Maestro dispatch
console system enters and leaves the console via modular
jacks on the Audio PA Boards. Both Audio PA Boards have
the same "LINE A" and "LINE B" labeling at the modular
jacks. As shown in Table 6, "LINE A" and "LINE B" labels
on the second Audio PA Board (#2) are considered LINE C
and LINE D respectively. Figure 7 shows modular jack
locations. LINE C, if used for a second unselect speaker,
connects to CEC/IMC CIM channel/line 3. Call Director
LINE D connects to CEC/IMC CIM channel/line 4.
NOTE
Refer to LBI-38715 if the C3 Maestro console
system is equipped with "Phase 1" Audio Matrix,
Audio PA, I/O or Backplane Boards. All "Phase 1"
boards have P29/500000xx00x part numbers and
all "Phase 2" boards have P29/772xxxxxxx part
numbers. When using any "Phase 1" board,
external CD interface transformers and other
special modifications are required for Call
Director interfacing.
Install a 4-wire balanced line (two pairs) between the
required CEC/IMC Audio Concentrator Card and Audio
PA Board #2 in the Audio Tower. See the prior section
entitled "CEC/IMC INTERCONNECTIONS" for
additional details on the Audio Concentrator Card pin-outs.
Terminate the Audio PA Board’s LINE D with an RJ-11
modular plug. RJ-11 pin-outs are shown in Table 5.
Shielded cable is recommended.
Table 10 describes the audio signals between the Audio
Tower’s Audio PA Board #2 and the CIM within the
CEC/IMC. The descriptions are relative to the Audio
Tower. All audio signals on these 600-ohm pairs have
typical levels of 0 dBm.
Console-to-Call Director Interconnections
Table 11 describes the various signals between the
Audio Tower’s I/O Board and the Call Director. The
descriptions are relative to the Audio Tower. All I/O Board
connections are made at the "CALL DIRECTOR" female
DB-9 connector. Figure 12 shows the connector's pin-out.
EQUIPMENT ROOM GROUNDING
Proper grounding techniques should be observed in
order to protect the equipment and service personnel from
lightning and other sources of electrical surges. All
consoles should be connected to properly grounded 3-
terminal outlets. If used, lightning arrestors, UPS
equipment, and all other console-associated equipment
should also be properly grounded.