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2.00 Expansion Shelf
Exoansion Shelf is provided optionally.
Up to two Expansion Shelves (1 and 2) can be
installed on the Basic Shelf to enlarge the ability
of the system.
Each Expansion Shelf contains its own power
supply and 15 mounting spaces for any optional
card required for system expansion.
Expansion Shelf is installed on top of the basic
shelf.
Free Slot can be equipped with the following
optional service cards.
a . Loop start central office trunk (LCOT) Card
b. Ground start central office trunk
Card
c. Hybrid line circuit (HLC) Card
d. Proprietary ITS Line circuit (PLC) Card
e. Single line telephone line circuit (SLC)
Card
f. Single line telephone line circuit with
Message Waiting (SLC-M) Card
g. Direct inward dialing trunk (DID) Card
h. Off premise extension trunk (OPX) Card
i. Doorphone circuit (DPH) Card
j. Automatic Gain control (AGC) Card
k. Direct inward system access (DISA) Card
m. Attendant console Line circuit (ATLC) Card
n. T-l Digital Trunk Card
Expansion Shelf consists of the following.
No.
1
POWER-for Power Unit
2
Construction of Expansion Shelf (1 and 2).
F
F
S
S
W
1
2
E
1 -E-2
(70695)M
Name
Number
i
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