The IP Node (IPN) is a network element of the TETRA ACCESSNET-T IP radio system and serves for providing the switching function, as a server for the network management system and as an application server for the dispatcher and voice recorder, for example.

In ACCESSNET-T-IP networks with a centralized routing function, the IPN operates as a classical system controller node. In this context, an IPN Server handles the software-based routing function. 

In addition, further IPN servers can be integrated to provide additional functions such as telephone interfaces (PABX/PSTN) or applications such as dispatchers.