I-Cable is gearing up to compete with Pacific Century CyberWorks HKT for a slice of the HK$10 billion fixed-line telephone market. The broadband Internet and cable television service provider has launched trials of a service that will allow consumers to make telephone calls using i-Cable's infrastructure. The company said yesterday it had begun testing its Voice-over-Internet Protocol telephone service in Nam Tin in Kowloon and Fortress Hill on Hong Kong Island. The protocol allows the company to deliver voice telephony services over its hybrid fibre coaxial network, which also delivers cable television and broadband Internet services. It delivers telephone conversations using the same method that data is sent over the Internet, rather than the traditional circuit switch infrastructure that the HKT network uses. I-Cable hopes the service will be commercially ready within 12 months.