4.3 Hardware Boards
4.3.1 Switching Main Control Board
In actual application of ZXR10 8912E/8908E/8905E, the switching module and control
module are integrated on one main control board, including CPU subcard, switching chip,
clock system and monitoring subcard, realizing management control for the whole
system and switching function for data packets of line cards. It can be divided into the
following functional modules: switching, control, clock, monitoring, outband
communication, power supply and logic modules. Its principle diagram is as shown in
Figure 4-13.
Figure 4-13 Principle diagram of 8912E/8908E/8905E main control board
In actual application of ZXR10 8902E, the main control board realizes the control function.
Its principle diagram is as shown in Figure 4-14.
Figure 4-14 Principle diagram of 8902E main control board
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