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 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 Output Request
 MVD_MSG_RESETSWX - Reset Switch Request
 MVD_MSG_SC_CONNECT - CT bus Connect Request
 MVD_MSG_SC_MULTI_CONNECT - Multiple Connect Request
 MVD_MSG_CNFCLOCK - Configure Clock Request
 MVD_MSG_CLOCK_PRI - Configure Clock Priority Request
4.3.1 LIU_MSG_CONFIG - LIU Configuration Request
Synopsis
Message sent by the application to establish the operating mode for a Line Interface
Unit (LIU).
Note: When using s7_mgt, this message is generated by s7_mgt as a result of the LIU_CONFIG
command. It therefore does not need be generated by the user.