# Changing configuration parameter settings

When you run oamsys, the utility starts all boards according to the configuration parameters specified in their associated board keyword files.

Specify parameters in board keyword files as name/value pairs, such as AutoStart = NO.

To change a parameter:

- Use of modify one of the sample board keyword files corresponding to your country and board type. Refer to the NMS OAM System User's Manual for information about the syntax of NMS OAM board keyword files.

- Specify parameter settings using the oamcfg utility. Refer to the NMS OAM System User's Manual for information about oamcfg.

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

- Specify the settings using the OAM service functions. Refer to the NMS OAM Service Developer's Reference Manual for more information.

A sample board keyword file, cx2000.cfg, is installed by Natural Access. You can copy this file and modify it. The file is located in one of the following paths, depending upon your operating system:

Operating system | Path to sample file
--- | ---
Windows | \nms\cx\cfg
UNIX | /opt/nms/cx/cfg

The contents of cx2000.cfg are shown in the following example. For information about NMS OAM board keyword files, refer to the NMS OAM System User's Manual.

#
# Standalone operation
#
Clocking.HBus.ClockMode = STANDALONE
Clocking.HBus.ClockSource = OSC
#
# Master the CT Bus (drive clock A)
#
#Clocking.HBus.ClockMode = MASTER_A
#Clocking.HBus.ClockSource = OSC
#
# Slave to the CT Bus (slave from clock A)
#
#Clocking.HBus.ClockMode = SLAVE
#Clocking.HBus.ClockSource = A_CLOCK

You can customize additional features:

- Configuring the ring cadence

- Configuring board clocking