# Stopping the Data Communication Services

In the event of a connection failure between an Atlas Copco system and the Atlas Copco Data Communication collection service (ACDC), data will be buffered in the controller. The buffered data will be retrieved by the data collection module as soon as a network connection is re-established.

The buffer size available depends on the controller type and current configuration. Refer to the manual for the controller and check memory settings/controller configuration, to determine the buffer size.

Internet Information Services do not normally need to be ended. If this service is ended, it will affect other web applications that do not belong to the ToolsNet system.

1. Start the ToolsNet Service Manager.

2. Stop the following services by selecting Stop:

   - Notification Service

   - License Server

   - Data Communication Service (ACDC)