Switch And Route Processing Unit A5 - Huawei ME60 Hardware Description

HUAWEI ME60 Multiservice Control Gateway
Hardware Description
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System Clock Unit
As the system clock unit, the SRU provides accurate and reliable SDH clock signals for LPUs.
The SRU can provide three-channel 2.048-MHz synchronous clock signals for the downstream
devices, or receive 2.048-MHz or 2.048-Mbit/s external reference clock signals.
System Maintenance Unit
As the system maintenance unit, the SRU collects system monitoring information to test system
units locally or remotely, or implement in-service upgrading of system units.
The SRU periodically collects information about the operation of system units through the
Monitorbus. The SRU then generates related control information based on the collected
information, for example, the detection of board installations and adjustments to fan speed.
Through the joint test action group (JTAG) bus, the SRU remotely or locally tests system units,
or performs in-service upgrading of system units.
Reliability
The main control modules, clock modules, and LAN switch modules on the SRU work in 1:1
hot backup mode, thus improving system reliability.
The two SRUs work in 1:1 backup mode. Each SRU monitors the status of the other. If the
master SRU is faulty, the slave SRU automatically takes over as the master SRU.

3.5.2 Switch and Route Processing Unit A5

Switch and Route Processing Unit A5 is the 200G Switch and Route Processing Unit
Appearance
Figure 3-19
Figure 3-19 Appearance of the SRU
Issue 02 (2012-11-15)
Data configuration: The SRU stores configuration data, startup files, charging information,
upgrade software, and system logs.
Data storage: The SRU provides two interfaces for CF cards, which serve as mass storage
devices to store data files.
NOTE
shows appearance of the ME0D0SRUA570 .
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