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Chapter 1
Introduction to OfficeServ500
Sizes and Configurations
OfficeServ500 is a fully modular system. A basic system comprises a single cabinet config-
ured as a KSU with interface cards and keysets. Up to two additional (expansion) cabinets
can be connected to a single cabinet 'L' system to enhance its abilities. A fully expanded 'L'
system (three cabinets) using TEPRI cards can have a maximum of 406 lines or 360 stations.
Without the TEPRI cards, the maximum number of lines is 208 and the maximum number of
stations is 360.
The system supports a maximum of 542 ports and 240 IP extensions. Each cabinet supports
one or two PSU-B power supply units. One PSU-B supports up to 56 stations; two PSU-Bs
support up to 120 stations. Both power supply units are connected to the DC bus for external
battery backup. Each cabinet also has four Digital Signal Processor (DSP) channels for use
as DTMF receivers/senders or tone detectors.
NOTE: For a full description of each card discussed in this section, refer to Chapter 2,
Hardware Descriptions.
Single Cabinet System (Basic KSU)
A single cabinet system
card (MCP2) slot and two power supply slots. 'S' systems have six universal slots, while 'M'
and 'L' systems have nine universal slots. On 'L' systems, the MCP2 card must be equipped
with an ESM daughterboard.
The first power supply slot must be occupied by a PSU-B to supply sufficient power to all 10
slots (nine universal and a processor slot) and support up to 56 stations. A second PSU-B
may optionally occupy the second power supply slot. Station or trunk (line) cards can be in-
stalled in any of the universal slots. The TEPRI and 8BSI cards must be installed in slots 1, 2
or 3. This allows a maximum of 120 stations of any kind or 138 lines in a single cabinet sys-
tem. Without TEPRI cards, the maximum number of CO lines in the basic KSU is 72.
Two Cabinet System
In a two cabinet system
stalled in slot 9 of the KSU. This card provides an intermediate level of processing to control
the first cabinet, thereby freeing resources on the MCP2 to control the entire system. Adding
the SCP2 card therefore reduces the number of universal card slots in the KSU to eight. The
expansion cabinet must also have a Local Control Processor (LCP2) card installed.
All processor cards have provision for installing three daughterboards. The MCP2 card must
be equipped with an ESM daughterboard. Any other type of daughterboard you need can be
installed on the MCP2, SCP2 or LCP2 card.
A two cabinet system has 17 universal card slots. This allows a maximum of 240 stations or
268 lines when using TEPRI cards. Without TEPRI cards, the maximum number of lines is
136 while the maximum number of stations remains at 240. The LCP2 card controls the ex-
pansion cabinet in a similar manner to the SCP2 in the KSU, and connects to the MCP2 via a
25-pair cable. The LCP2 card resides in dedicated slot 10 of the expansion cabinet and
therefore does not deplete the number of universal card slots.
(Figure
1–1) has a number of universal card slots, a main processor
(Figure
1–2), the Signal Control Processor (SCP2) card must be in-
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