Communication system for voice-over internet protocol using license-free frequencies

摘要

In a communication system comprising
- at least one handset (1) having a microphone (2), a loudspeaker (3), a keyboard (4) , and Bluetooth capability,
- at least one Bluetooth access point (6) providing an internet connection,
- at least one internet-connected VOIP server (8) providing call connections in the form of PSTN, GSM, VOIP, etc., there is provided a software-implemented client (11,12,13,18) functioning as a call centre and controlling outgoing and incoming communications to be directed via the Bluetooth connection (5) between the handset (1) and the Bluetooth access point (6) and via the internet (7) to and from the VOIP server (8) controlling the call connections. This provides the possibility of making calls at a reduced price or even free.