Competition in the lucrative area of selling telephone services to big corporations continues to intensify with the launch yesterday of another operation aimed at grabbing a greater slice of the business market. City Telecom (HK), known as CTI, which specialises in offering cut-price international services using call-back, has formed a unit to produce tailor-made corporate packages. Regional director Ricky Wong said a key element of the operation would be to continue offering discounted services while ensuring calls always got through. 'Some customers have concerns about call-back connections,' he said. 'We are offering guarantees that if a call does not get through under our system it will immediately be routed through Hongkong Telecom's international gateway and we will meet the extra cost.' The new unit is to be called the Specialised IDD Network for Corporations (INC). The company said INC would match prices offered by any other discount operators. CTI has operated in Hong Kong for five years. With 400,000 registered customers, it has the largest subscriber base of the companies offering discounted international direct dial services. Unlike other providers of long distance call-back services, CTI does not have a licence to offer local calls and does not receive a payment from Hongkong Telecom for delivery of international calls to its gateway. All the new providers of telecommunications in Hong Kong have made business users their primary target. Competition should increase sharply as foreign telecom companies gain increasing access to the Hong Kong market. The Office of the Telecommunications Authority (Ofta) promised to begin handing out licences shortly to operate virtual private networks in Hong Kong. This will allow any phone company to offer tailor-made private telecommunication systems connecting a company's offices around the world.