Specifications

CONTENTS
1–4
THREE CABINET SYSTEM
In a fully expanded three cabinet system, there are 20 universal card slots (see Figure 1–3).
This allows a maximum of 112 stations or 168 lines when using a T1 card. Without the T1 card,
the maximum number of lines is 160 and the maximum number of stations is 120.
1.3 SIZE AND CONFIGURATION WITH PSU 60
The PROSTAR DCS is a fully modular system comprised of a basic Key Service Unit, two
additional expansion cabinets, interface cards and electronic keysets. A fully expanded
system using the T1 card can have a maximum of 168 lines or 172 stations. Without the
T1 card, the maximum number of lines is reduced to 160.
SINGLE CABINET SYSTEM
A single cabinet system has seven universal card slots (see Figure 1–1). Station or trunk
(line) cards can be installed in any of these slots. The T1 card must be in slot 1, 3 or 5 and
the even-numbered slot to the right of the T1 card must be left empty. This card requires
two slots as it provides 24 lines. This allows a maximum of 60 stations of any kind or 64
lines in a single cabinet system. Without the T1 card, the maximum number of lines in the
basic KSU is reduced to 56.
TWO CABINET SYSTEM
When it is required that the basic system be expanded to provide a capacity greater than
that described above, the Expansion A or A1 card must be installed in slot seven of the
KSU. This card provides the High-Speed Digital Link (HDL) pathways that are used to
connect the expansion cabinets to the basic KSU. Adding this card will therefore reduce
the number of universal card slots in the basic KSU to six.