Changing Configuration Files and Downloadable Parameters

Each SCX160 SCxbus Adapter must be configured as either a master clock source or as a slave clock node (default) for the SCxbus. The following procedure describes the steps for changing the configuration files to use downloadable parameters.

1. Edit the scxbus.prm file, located in the %DIALOGICDIR%\data directory, to uncomment the PARM[253] and the PARM[254] lines and set the PARM[253] value to the desired clock mode. For example, to select the SCxbus Master Clock mode for this node, set:

 
PARM[253] = 0010H
 
and then uncomment the PARM[254] line and set:
 
PARM[254] = 0001H

NOTE:

To select the SCbus as the clock reference for this node; see the Example below.

At all other system nodes, you can use the default parameters established at Dialogic Service startup. The defaults will set the SCX160 SCxbus Adapter to SCxbus clock slave mode with automatic fallback to its internal clock when SCxbus clock is not detected. To change these defaults (e.g., to set up a fallback master node), change the configuration files and parameters at each node in the manner described above for the master clock node (only one node can be the master clock node at a time). See the scx_setbrdparm( ) function in Chapter 6.  Function Reference for clock selections and descriptions. Also see Chapter 4.  Clocking for a description of the various clocking configurations, designations and modes.

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