LBI-39055
9
• • Test Options - All Disabled (or factory defaults)
• • Dial Line Options - (not applicable; leave at factory
defaults)
• • Speaker Options
Volume Control = Low
Control = On Until Carrier Detect

Audio Links

Audio Concentrator Cards at the back of the CEC/IMC
cabinet provide audio connections at the CEC/IMC. See the
customer-specific system documentation print-outs for
Concentrator Card connector pin-out details.
At the C3 Maestro, audio connections terminate at
RJ-11 modular jacks on the Audio PA Board(s) in the
Audio Tower. These jacks are labeled "LINE A" and "LINE
B". Table 6 shows line requirements between the C3
Maestro and the CEC/IMC for each audio input or output
2-wire pair. Note that two (2) output pairs, Line B out on
board #1 and Line A out on board #2, are never used. Table
5 gives the modular jack pin-outs and Figure 7 shows their
locations. Interconnect the required pairs between the
Audio PA Board(s) and the appropriate CEC/IMC Audio
Concentrator Card. Shielded pairs are recommended.
TABLE 5 −− CONSOLE-TO-CEC/IMC BALANCED
LINE AUDIO INTERCONNECTIONS
STANDARD
6-POSITION
4-CONTACT
RJ-11 PIN
NUMBER
*
AUDIO PA
BOARD
6-POSITION
4-CONTACT
RJ-11 PIN
NUMBER
TO/FROM
CEC/IMC
1 (none) (n/a)
2 1 CIM Line Out
3 2 CIM Line In
4 3 CIM Line In
5 4 CIM Line Out
6 (none) (n/a)
* RJ-11 pins 1 and 6 are not used.
Figure 7 −− Audio PA Boards' Modular Jacks

PERSONAL COMPUTER

PC-To-Audio Tower Interconnect Cable

The PC-to-Audio Tower Interconnect Cable (part
number P29/1030050000) must be connected between the
PC and the Audio Tower. This cable has male DB-37
connectors on both ends with the connectors' pins wired in
a straight-through pin-to-pin fashion - pin 1 to pin 1, pin 2
to pin 2, etc. The cable is ten (10) feet long and it should
not be lengthened.
Mate one male DB-37 connector to the Logic Board
and mate the other to the Audio Matrix Board's connector
labeled "COMPUTER".
NOTE
Do not over-tighten the screws on the DB-style
connectors.
LINE A
LINE B
DIG. IN 1
DIG. IN 2
RELAY 2
LINE A
LINE B
DIG. IN 1
DIG. IN 2
RELAY 2
SELECT AUDIO
AND MIC
UNSELECT #1
(LINE OUT PAIR
NOT USED)
UNSELECT #2
(LINE C), (LINE
OUT PAIR NOT
USED)
PA #1
PA #2
RELAY 1
RELAY 1
CD PATCH AUDIO
(LINE D)
OR
UNSELECT #3