Specifications

4 Message Reference
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4.3 Hardware Control Messages
Hardware control messages are used to control various hardware devices on the board
including the T1/E1/J1 Line Interface Units (LIUs), the digital cross connect switches
and the clocking mode for the board.
In a static configuration, all these hardware blocks can be set up using the s7_mgt
protocol configuration utility along with the appropriate commands in the config.txt
protocol configuration file.
If dynamic control of the hardware is required (or the user has elected not to use
s7_mgt), the user application must build and send at least some of the hardware
control messages.
The messages in the hardware control category include:
• LIU_MSG_CONFIG - LIU Configuration Request
• LIU_MSG_CONTROL - LIU Control Request
• LIU_MSG_R_CONFIG - LIU Read Configuration Request
• LIU_MSG_R_CONTROL - LIU Read Control Request
• MVD_MSG_SC_DRIVE_LIU - LIU CT Bus Initialization Request
• MVD_MSG_SC_LISTEN - CT Bus Listen Request
• MVD_MSG_SC_FIXDATA - Fixed Data Request
• MVD_MSG_RESETSWX - Reset Switch Request
• MVD_MSG_SC_CONNECT - CT Bus Connect Request
• MVD_MSG_SC_MULTI_CONNECT - CT Bus Multiple Connect Request
• MVD_MSG_CNFCLOCK - Configure Clock Request
• MVD_MSG_CLOCK_PRI - Configure Clock Priority Request
• MVD_MSG_LED_CTRL - LED Control Request