Inter-Tel Encore Installation, Programming And Maintenance Version 4 Manual

Page 2-11
Installation
ENCORE MANUAL, Issue 4.0 – July 2002
Key Service Unit (KSU)
INSTALLATION
2
5. KEY SERVICE UNIT (KSU)
A. KSU DESCRIPTION
5.1The KSU is a compact, wall-mounted unit that houses the system power supply, the
CPU, and the expansion cards. The KSU performs all control and switching activities for the
system, including: detecting incoming CO calls, storing speed-dial numbers, processing data-
controlled features, and controlling the interaction between keysets, single-line sets, CO...

Page 2-12
Installation
ENCORE MANUAL, Issue 4.0 – July 2002
Unpack and Inspect The KSU
B. UNPACK AND INSPECT THE KSU
5.6Before beginning the installation:
1.Unpack the KSU and lay it on a flat surface with the cover facing up. 
2.Remove the MDF cover by removing the retaining screw at the bottom and sliding the
MDF cover upward. Open the KSU by loosening the two retaining screws on the left
side of the cover and lifting the cover off the hooks located on the right side. (The
screws on the KSU will not...

Page 2-13
Installation
ENCORE MANUAL, Issue 4.0 – July 2002
Install the Expansion Cards in the KSU
INSTALLATION
2
C. INSTALL THE EXPANSION CARDS IN THE KSU
5.7The KSU has circuitry for six extensions. Expansion cards add circuitry for additional
extensions and CO lines. Up to two Extension Cards and four Line Cards can be installed as
shown below. 
5.8An optional Voice Messaging Module can also be installed. This card provides up to 80
minutes of voice storage for extension voice message boxes and the...

Page 2-14
Installation
ENCORE MANUAL, Issue 4.0 – July 2002
Install the Expansion Cards in the KSU Line Card
5.12The Line card adds two CO lines to the system. Because the CPU does not have CO
line connectors, at least one Line Card must be installed for CO line access. Line Cards can be
installed on the CPU or on Extension Cards, as shown below.
NOTE: If only one line on a two-port Line Card will be used, the second line must be disabled
using system programming.
5.13To install, insert the Line Card...

Page 2-15
Installation
ENCORE MANUAL, Issue 4.0 – July 2002
Install the Expansion Cards in the KSU
INSTALLATION
2
Extension Card
5.14Each Extension Card has circuitry for an additional six extensions. Up to two Extension
Cards can be installed.
5.15The Extension Card has a grounding connector, Line Card and line connectors, and six
extension connectors. The figure below shows the Extension Card connectors. The six exten-
sions are numbered 26 through 31 for the card in the lower connector on the CPU and...

Page 2-16
Installation
ENCORE MANUAL, Issue 4.0 – July 2002
Grounding the KSU 5.16To install, insert the Extension Card into the connectors on the CPU. The card must be
inserted with the column support located under the line termination points as shown below.
NOTE: To protect the system against high voltage surges on incoming CO lines (for example,
caused by lightning), the ground connector on the Extension Cards must be connected to the
grounding point on the CPU. Then the CPU must be attached to earth...

Page 2-17
Installation
ENCORE MANUAL, Issue 4.0 – July 2002
Replace the KSU Cover
INSTALLATION
2
E. REPLACE THE KSU COVER
5.19If expansion cards have been installed in the KSU, you must remove the break-off pan-
els from the side of the KSU cover to allow access to the connectors. 
5.20Position the cover over the hooks on the right edge of the KSU and then lower the cover
onto the KSU. Tighten the retaining screws on the cover.
Encore
Break-Off Panels
Inter-Tel Encore
Two retaining screws 

Page 2-18
Installation
ENCORE MANUAL, Issue 4.0 – July 2002
Wall-Mount the KSU
F. WALL-MOUNT THE KSU
5.21When a suitable location has been found, mark the screw locations on the mounting sur-
face, using the mounting bracket provided. Position the bracket on the wall and ensure that it is
level. Mark the screw holes, then drill four holes in the wall at the marked locations. If the
KSU is being mounted on masonry or plasterboard, use suitable fasteners. 
5.22The figure below shows the mounting bracket...

Page 2-19
Installation
ENCORE MANUAL, Issue 4.0 – July 2002
Connecting Cables to the KSU
INSTALLATION
2
G. CONNECTING CABLES TO THE KSU
Wiring Technique
5.24The extension and line cables connected to the CPU enter the KSU at the bottom of the
KSU, as shown below. Remove the break-out panel at the bottom of the KSU and pass the
cables that will be connected to the CPU through the cable entry hole. 
5.25Cables that will be attached to the Extension Cards are routed from the left side of the
KSU, directly...

Page 2-20
Installation
ENCORE MANUAL, Issue 4.0 – July 2002
Main CPU Connections — Cable A
FIGURE 3.Main CPU Connections — Cable A
Table 2-2: Main CPU Connections - Cable A
CABLE PAIRCONNECTIONDEVICE
W-BL VOICE-A
Ext 20
BL-W VOICE-B
W-O DATA-C
O-W DATA-D
W-G VOICE-A
Ext 21
G-W VOICE-B
W-BR DATA-C
BR-W DATA-D
W-S VOICE-A
Ext 22
S-W VOICE-B
R-BL DATA-C
BL-R DATA-D
R-O VOICE-A
Ext 23
O-R VOICE-B
R-G DATA-C
G-R DATA-D
R-BR VOICE-A
Ext 24
BR-R VOICE-B
R-S DATA-C
S-R DATA-D
BK-BL VOICE-A
Ext 25
BL-BK VOICE-B...