CHINADDN：
　　The DDN (Digital Data Network) transports digital signals through digital channels. If the demanding bandwidth is below 2MBps, it can provide the users with semi-permanent connection. It possesses lots of strengths such as high-quality, fast speed, transparency and efficiency. It can transport data, voice and pictures point to point and point to multi-points. Empowered by DDN, users can apply for various kinds of info services. China Telecom DDN service has extends to most towns and cities in China and to the world.

CHINAFRN：
　　The CHINAFRN is a kind of data transmission technology developed from the packed switch technology. If the customers’ bandwidth needs are below 2Mbps, it can meet high speed data communication demand among LANs, and it transports multimedia information of data, pictures and voice. The CHINAFRN service offered by China Telecom covers most towns and cities in China, and any needs can be satisfied through extension of DDN.

ATM Service：
　　Abbreviation of Asynchrony Transfer Model, the ATM service utilizes the Asynchrony Time Duplication technology to transmit signals. Because ATM divides data for transport into fixed-length, it supports high speed plus high efficiency. It speeds up data processing and transmission. Now ATM can provides customers with different QOS classes with bandwidth reaching to 622M Bps. There are more than 700 ATM switches to support the ATM network. China Telecom ATM service reaches 200 cities and extends to all the towns and cities over DDN.

MPLS-VPN Service：
　　Today businesses demand greater bandwidth and enhanced performance to meet their ever-increasing communications needs. Companies must be able to efficiently and cost-effectively communicate with dispersed branches. Depending on the public IP network, utilizing MPLS protocols, the MPLS VPN service build up virtual private network for business customers on the IP network. Without the traditional end-to-end physical links between two points, MPLS VPN uses the logic links on the public network platform to provides bandwidth from N*64Kbps to 100Mbps. It can support point-to-point service and point-to-multipoint service. The MPLS VPN service is available in Sichuan.