就一般的国际免费专线电话服务而言，客户可在世界任何地方拨通特定的客户专线号码，致电某公司，而公司会代替客户支付长途电话费用。这样做的目的是树主公司全球形象，增加企业收入。但在传统的电话网络上提供国际免费电话业务的成本太高，限制了中小型企业的采用。相对而言 In the case of a normal international toll free telephone service, a customer may call a specific customer hotline anywhere in the world, call a company, and the company will pay for the long distance call in lieu of the customer. The purpose of doing so is to grow the company’s global image and increase corporate income. However, the cost of providing international freephone services over traditional telephone networks is too high, limiting the adoption of small and medium-sized enterprises. Relatively speaking