A31003-K16-X001-3-7620, 07/99
Hicom 100 E Version 2.1, Service manual
2-1
General system descriptio
System data
2 System data
2.1 General system description
The Hicom 108/112/118 systems belonging to the Hicom 100 E product family are compact,
digital, Euro-ISDN-compatible telephone systems suitable for analogue and digital network ac-
cess and for analogue and digital terminals. The basic configuration of each system can be ex-
panded and supplemented in different ways. See Figure 2-2 (Hicom 108), Figure 2-3 (Hicom
112), Figure 2-4 (Hicom 118).
The Hicom 108/112/118 systems are of flatpack design, i.e. without a backplane. All basic func-
tions are incorporated on the motherboard (see Figure 3-4). The systems have plastic housings
consisting of base, intermediate section, and cover. The Hicom 118 has an additional interme-
diate frame to accommodate system expansions. The housing sections are held together by
easily released latches.
The system expansions are of the plug-in type. The Hicom 108 has 1 slot (for analogue trunk
or S
0
line modules), the Hicom 112 has 2 slots (for analogue trunk and S
0
line modules), and
the Hicom 118 has 4 slots for further system expansions with line and subscriber modules.
The function expansions (optional) are attached with their own housings to the basic housing.
The power supply (PSU/UPS) is also attached mechanically and electrically to the basic hous-
ing and is additionally secured by screws.
The integral main distribution frame is part of the basic housing. Plug-in connectors (terminal
blocks) render the line network easily separable from the system cards.
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