1# Common Events of the Network Management Subsystem 2This document lists the common system events provided by the network management subsystem to applications. Applications can use [APIs](../js-apis-commonEventManager.md) to subscribe to common system events. 3 4 5## COMMON_EVENT_CONNECTIVITY_CHANGE<sup>10+<sup> 6 7Indicates that the network connection state has changed. 8 9- Value: usual.event.CONNECTIVITY_CHANGE 10- Required subscriber permissions: none 11 12When the (Ethernet, Wi-Fi, or cellular) network connection state changes (to disconnected, connecting, or connected), the event notification service is triggered to publish this event. 13 14## COMMON_EVENT_AIRPLANE_MODE_CHANGED<sup>10+<sup> 15 16Indicates that the airplane mode state has changed. 17 18- Value: usual.event.AIRPLANE_MODE 19- Required subscriber permissions: none 20 21When the airplane mode is set, the event notification service is triggered to publish this event. 22 23## COMMON_EVENT_HTTP_PROXY_CHANGE<sup>10+<sup> 24 25Indicates that the HTTP proxy configuration has changed. 26 27- Value: usual.event.HTTP_PROXY_CHANGE 28- Required subscriber permissions: none 29 30When the configuration of the global or network-specific (such as Ethernet and Wi-Fi) HTTP proxy changes, the event notification service is triggered to publish this event. 31