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INSTALLATION-PCB
SECTION 200-096-206
FEBRUARY1991
TABLE6-A
PCTUANDPCTUSCONTROLS,INDICATORS,ANDlNTERFACECONNECTORS
CONTROL/INDICATOR/
CONNECTOR
(Figures 6-I & 6-2)
PCTU ON/OFF
Jumper Pl
TYPE OF COMPONENT
DESCRIPTION
Three-terminal jumper plug
Enables PCTU (1 & 2 only) PCB for
operation. Should always be in ON position
DTM F Receiver
Connector P2
1 O-pin connector
Interface connector for optional DTMF
Receiver P2 Unit subassembly
(used in conjunction with P3, P8, and P9).
DTM F Receiver
Connector P3
6-pin connector
Interface connector for optional DTMF
Receiver P3 Unit subassembly
(used in conjunction with P2, P8, and P9).
MoH’BGM Music ‘Ource
Interface connector for Music-
Connector P6
Two-terminal connector
on-Hold (MOH)/Background Music
source.
BATT Battery Strap
P7
Interface connector for on-board lithium
Three-terminal jumper plug
battery that protects configuration data
stored in system RAM.
DTM F Receiver
Connector P8
1 O-pin connector
Interface connector for optional DTMF
Receiver P8 Unit subassembly
(used in conjunction with P2, P3, and P9).
DTMF Receiver
Connector P9
6-pin connector
MOH/BGM Music Source Trim
potentiometer
Volume Control VRI
Heartbeat Indicator
Red LED
Interface connector for optional DTMF
Receiver P9 Unit subassembly
(used in conjunction with P2, P3, and P8).
Adjusts volume for Music-on-
Hold/Background Music feature.
Flashes to indicate operation (l/4-second
on-l/4-second off); (PCTUl, 2, or 3 only).
l
Internal Options
CAUTION!
l
DTMF Receiver Unit, four circuit (CRCU-4)
Do not remove insulating shield from back
l
DTMF Receiver Unit, eight circuit (CRCU-8)
l
External Options
of PCTU PCB. If shield comes off, do not
allow the backof the PCB to contact metal.
l
Music-on-Hold/Background Music (con-
nected to P6 and VR1 level control)
NOTE:
1) Remove the PCTU and CRCU from their
protective packaging.
Refer to Peripheral Equipment Installation,
Section 200-096-208, for installation of ex-
ternal options.
NOTE:
PCTU connectors P2, P3, P8, and P9 are
positioned to allow installation of the CRCU (-4
or -8) only in the proper position,
3.12 DTMF Receiver Unit (CRC&4 or CRCU-8)
Installation. Install the DTMF Receiver Unit (CRCU)
in accordance with the following steps: 2) Mate CRCU connectors Jl, J2, J3, and J4
6-4