# Related products

In addition to the NMS ISDN software, you need the following components to build an ISDN protocol application:

- One or more AG or CG boards with one or more trunk interfaces

- Natural Access

- NMS OAM

- oamsys and oammon - the board loading and monitoring programs

Warning: | NMS Communications obtains board-level approvals certificates for supported countries. Some countries require that you obtain system-level approvals before connecting a system to the public network. To learn what approvals you require, contact the appropriate regulatory authority in the target country.

## Natural Access

Natural Access is a complete development environment for voice applications. It provides a standard set of functions grouped into logical services. Each service has a standard programming interface.

For general information about installing and using Natural Access, see the Natural Access documentation.

## NMS OAM

NMS Operations, Administration, and Maintenance (OAM) manages and maintains the telephony resources in a system. These resources include hardware components, such as AG or CG boards, and low-level board management software modules.

Using NMS OAM, you can:

- Create, edit, delete, and query the configuration of a component

- Start, stop, and test a component

- Receive notifications from components

NMS OAM maintains a database containing records of configuration information for each component, as shown in the following illustration. This information consists of parameters and values.

Each NMS OAM database parameter and value is expressed as a keyword name and value pair (for example, Encoding = MU_LAW). You can query the NMS OAM database for keyword values for any component. Keywords and values can be added, modified, or deleted.

Note: Before using NMS OAM or any of its related utilities, ensure that the Natural Access Server (ctdaemon) is running. For more information about ctdaemon, refer to the Natural Access Developer's Reference Manual. For general information about NMS OAM and its utilities, refer to the NMS OAM System User's Manual.

## NMS OAM and the configuration files

The NMS OAM system configuration file and referenced board keyword files contain information that oamsys reads to determine how to configure a board. These files contain information such as country-specific settings that must be tailored to describe your hardware and software setup.

When you set up your system, specify configuration information for all boards in your system with configuration files and board keyword files. These files specify

- Whether a board performs MVIP
  switching.

- Which board is the MVIP clock master.

- The software modules to transfer to the AG or CG board's memory on startup, including the TCP
  s to load.

The NMS ISDN software includes several sample files that describe configurations for different boards. Running the system with NMS OAM describes how to use the sample NMS OAM configuration files to create a file that configures your NMS ISDN software.

To initialize your boards based on the information in the configuration files, run the oamsys utility. oamsys transfers all software modules specified in the file to each board and performs other needed configuration activities. Run oammon to monitor boards for errors and other events. Use oamcfg to change system information or board parameters while the system is running.

oamsys, oamcfg, and oammon are installed with NMS OAM. For more information, see the NMS OAM System User's Manual.