Main Module - Motherboard - Siemens Hicom 100 E Service Manual

Overview of modules

Main module - motherboard

3.4 Main module - motherboard
The MB 6/4 motherboard is the main board and accommodates 6 digital extension interfaces
(U ), 4 analogue extension interfaces (a/b), the V.24 interface (SIC – serial interface cable),
P0/E
an integrated digital modem, the signalling unit (SIU), a real-time clock with NC battery, and a
PCM highway controller and conference circuit.
Hicom 108 MB 2/4 - motherboard with 2 x U
Hicom 112 MB 4/4 - motherboard with 4 x U
Hicom 118 MB 6/4 - motherboard with 6 x U
An EXM or MPPI module can be connected to the MB for external music on hold. The module
also has a V.24 interface with a mini-DIN connector that can be used for outputting or editing
call charge data or customer data. Teleservice is possible via both the V.24 interface and the
digital modem (in connection with a digital trunk of the STLS module).
U / a/b extensions are connected by means of screw terminals. These terminals can be re-
P0/E
moved from the module for installation or maintenance purposes.
MDF side
U ports
P0/E
1...6
SIC
V.24 adapter
a/b ports
1...4
EXM / MPPI
Figure 3-3 Motherboard interfaces (SW 2.0.1+)
3-10
1
X1
4
5
Not assigned for MB2/4
X2
9 -12 not assigned
12
for MB4/4
X10
X11
GND
1
X3
8
1
X4
10
, 4 x a/b (see Table 3-9)
P0/E
, 4 x a/b (see Table 3-10)
P0/E
, 4 x a/b (see Table 3-11)
P0/E
MB
PSU/UPS
Plug connector as
of SW 2.0.2
Options bus
Hicom 100 E Version 2.1, Service manual
PSU/UPS side
3 and 4
System
expansion
1 and 2
A31003-K16-X001-3-7620
,
07/99