# Changing configuration parameters

When you run oamsys, the OAM API reads parameters provided in the board keyword files. OAM then starts all boards according to these parameters.

You can change board keyword parameters in the following ways:

- Duplicate the sample board keyword file appropriate for your country and board type, modify the new file, specify the name of the new file in the File statement of the oamsys.cfg file, and run oamsys again. For information about the syntax used in OAM API board keyword files, refer to the Dialogic® NaturalAccess™ OAM System Developer’s Manual.

- Create a new board keyword file, either with additional keywords or with keywords whose values override earlier settings.

- Specify parameter settings directly using the oamcfg utility. For more information about this utility, refer to the Dialogic® NaturalAccess™ OAM System Developer’s Manual.

- Specify the settings using OAM service functions. For more information, refer to the Dialogic® NaturalAccess™ OAM API Developer's Manual.

For example, this manual describes how to:

- Set the board for T1 or E1 trunks. For more information, refer to Configuring the T1 or E1 interface.

- Change which software module files are downloaded to the board at startup. For more information, refer to Specifying configuration file locations.

- Set up a bus clock source and configure alternative (or fallback) clock sources. For more information, refer to Configuring board clocking.

- Connect the board to an Ethernet network. For more information, refer to Connecting to an Ethernet network.

- Specify board switching. For more information, refer to CG 6060C switch models.