# Available endpoints

The Fusion MSPP API provides several types of endpoints. Available MSPP endpoints include:

Endpoint type | Description
DS0 full duplex | Entry and exit point for voice or fax over PSTN data.
RTP IPv4 full duplex | Entry and exit point for duplex voice over IP data (includes RTP header within UDP packets) in accordance with IPv4.
RTP IPv4 simplex receive | Entry point for simplex voice over IP data (includes RTP header within UDP packets) in accordance with IPv4.
RTP IPv4 simplex send | Exit point for simplex voice over IP data (includes RTP header within UDP packets) in accordance with IPv4.
RTP IPv6 full duplex | Entry and exit point for duplex voice over IP data (includes RTP header within UDP packets) in accordance with IPv6.
RTP IPv6 simplex receive | Entry point for simplex voice over IP data (includes RTP header within UDP packets) in accordance with IPv6.
RTP IPv6 simplex send | Exit point for simplex voice over IP data (includes RTP header within UDP packets) in accordance with IPv6.
T.38 fax | Entry and exit point for duplex T.38 fax data.
ThroughPacket (duplex) | Entry or exit point for directing multiple voice streams that are multiplexed according to the ThroughPacket algorithm for packet network transmission.

After creating endpoints, applications can use the MSPP functions to query and command the endpoints.