After decades of signalling alarms over public service telephone networks (PSTN), the major communications companies recently started to tell us that voice over Internet protocol (VoIP) will increasingly replace circuit switched communications as the preferred method of communication. Rollout of British Telecom's 21CN has proved this to be the case in the UK and there are many similar projects underway throughout the world. The days of the Plain Old Telephone System (POTS) seem to be numbered.Read on here:
