I N D O O R U N I T
37
IDU Functional Design
The CFM IDUs consist of the following functional blocks (see Figure 12 and Figure 13):
•
Cable interface
•
Base-band modem
•
Power supply unit
•
Management controller
•
Multiplexer (MUX) board (refers to the multiplexer, E1 and modular Fast Ethernet
bridge IDUs only);
•
Ethernet Interface board (refers to the CFM-8-REB only)
•
Traffic interfaces
Figure 12. The CFM series E1 IDU block diagram
Figure 13. The CFM-8-REB IDU block diagram
Cable
Interface
Management Controller
Base-band
Modem
Power
Supply Unit
MUX
C
oax
c
ab
le
to
OD
U
IDU
Ethernet
RS232
LCD
E
1
Int
er
fa
ce
E1 I
nte
rf
ace
. . . . (4 … 16) x E1 Interfaces . . . .
Alarm Port
Cable
Interface
Management Controller
Base-band
Modem
Power
Supply Unit
Ethernet
Interface
Board
Co
ax
c
a
ble
to
ODU
IDU
Ethernet
RS232
LCD
Содержание CFM-13-LM
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