The IP DECT system provides a complete integration of voice functions. The communication is done through IP trunks using the H.323/X-mobile interface. The IP DECT stations on Communication Manager side uses the XMOBILE station type.

The IP DECT R4 system includes the DECT R4 IP Base Station and the 3720 and 3725 DECT handsets. There is one IP Base Station Master, one IP Base Station Standby Master and the DECT Radio Based Stations, all of which reside on the IP network. The Avaya In-Building Wireless Server (AIWS) provides additional capabilities, such as messaging, centralized phonebook, device administration over the air to the IP DECT R4 system and can be integrated with external applications, such as different alarm systems through OAP interface.

The legacy IP DECT system includes the Avaya DECT Mobility Manager (ADMM) and DECT Radio Based Stations, all of which reside on the IP network, and Avaya 3701 and 3711 IP DECT handsets.