It sends and receives encoded audio over IP networks, via a soundcard or audio interface. It can be used for point-to-point audio links or multicast, eg. private transmitter links for a radio station or other live audio distribution. In contrast to traditional streaming, high quality wideband audio (such as music) can be sent with low-latency, typically as low as a few milliseconds, and incredibly fast recovery from dropouts.

It works favourable as a replacement for traditional ISDN lines and hardware ISDN codecs.