MINI-LINKEandEMicro
SMU
MUX
1+1
Switch Logic
MMU2
MMU1
X1
X2
CPU
CPU
X1
RAU A
RAU B
Traffic
T1
T2
*
MMU 34+2 only
X2
RMX
RMX
Traffic 2 Mbit/s
*
RMX - Radio Frame Demultiplexer
X1 - Hardware Switch
(located in the Traffic Router)
X2 - RMX Switch
(located in the Radio Frame Demultiplexer)
CPU - Control & Supervision processor
T1 - Traffic channel 1
T2 - Traffic channel 2
MUX - Demultiplexer
3533
Figure 46 1+1 protection switching for the receiver
DC Failure
If a DC failure occurs in one of the MMUs in a 1+1 system, the other MMU
supplies the SMU and the SAU (if applicable) with DC power. However, when
17x2 Mbit/s capacity is required the 2 Mbit/s signal connected to the MMU with
DC failure will be lost. The other 16x2 Mbit/s signals will still be working.
62
AE/LZT 110 2012 R8C 2002-03-04
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