Polycom DOC2238A - Manual (Page 91)

MGC+ Hardware and Installation Manual
4-11
In the MGC+50, the front of the Backplane contains eight slots for Functional
Modules and additional slot (Slot A) for the Main Control Module.The back
of the Backplane also contains 7 slots for I/O cards and 1 slot for the Main
Control Module. The Network Interface Module is connected via the
Backplane to I/O cards, which connect the system to the network. The Power
Supply Module provides power to the Backplane via a power bus.
Figure 4-8: MGC+50 Backplane
Control Bus
The MGC+100 and the MGC+50 use the same Control Bus. The Control Bus
connects the Main Control Module to the Functional Modules. The Control
Bus is an HDLC bus. A double bus is implemented for redundancy.
MUSIC I/O
H.323 I/O
NET I/O
Rear
Backplane
Front
Power Supply
Module
NET
-8
IP
+
Aud
io
+
Audio
+
Mux
+
V
ideo
+
V
ideo
+
Vi
d
e
o
+
CU I/O
Control
Module