DDN is a network that uses digital dedicated line of synchronous transmission network. It offers transparent end-to-end transmission in physical links China Netcom. DDN products offer three choices: local P2P, domestic long-distance P2P and International long-distance P2P.

• Local P2P: It offers end-to-end digital data circuit connection between any two local points.
• Domestic Long-Distance P2P: It offers end-to-end digital data circuit connection between any two points in China.
• International Long-Distance P2P: It offers end-to-end digital data circuit connection between any two trans-national or trans-regional points.

Target Customer

• Finance, securities, insurance
• Foreign-invested business and joint ventures
• Transportation
• Government agencies (VIPs)

Features and Advantages

• High transmission rate. The DDN digital cross-connection multiplex equipment offers data transmission channel with the rate up to 2Mbps or NX64Kbps.
• High quality transmission. Optical fibre transmission system is widely used in digital relay. Users are connected via dedicated lines and latency is minimal in the network.
• Simple protocol. It uses cross-connection and time-division multiplex technology. The user-end equipment with high degree of intelligence can complete the protocol conversion, not restricted by any specifications. It is a transparent network for all categories of data users. Multiple functions can be delivered in one line.
• Flexible connection mode. It can support data, voice, and image transmission services. It can be connected to users’ terminal equipment or user network, therefore providing a flexible environment for network deployment.
• High reliability of circuits. It adopts alternative and standby routing, making circuits safe and reliable.
• Easy management and operation. It monitors and controls network services in the Network Management Center (NMC) and services can be generated quickly.

Strengths

• High quality transmission and service network.
• Entensive network coverage. China Netcom offers services via dedicated lines in major countries in the world and in county-level cities in China.
• Customers can have voice, data and TV conference communications via the dedicated lines.

Values

• DDN connects LANs of different branches and offices with the LAN of the headquarter enabling data transmission, E-mail and voices services within the enterprise.
• It provides access to the Internet and enable E-business applications.
• Security and confidentiality. DDN offers dedicated transmission channel.

Network Resources
China Netcom owns long-distance trunk-line resources, local access resources of 10 northern provinces, and some business and development areas in major cities in the south. It also owns independent FLAG cables and satellite transmission resources. It has POPs in Hong Kong, Taiwan and U.S. China Netcom also signed cooperation agreements with over 10 telecom operators in the world.

China Netcom's Frame Relay (FR) provides three services namely local PVC, domestic long distance PVC and FR-VPN. FR is an ideal high-speed transfer service for LAN interconnection. It provides efficient and cost-effective solution to customers with branches in different cities and countries that require interconnection services.

Customer Orientation
Business or large, and international customers

Product Features

• 64 Kbps port rate – N*64K~2Mbps
• PVC ensures dedicated bandwidth for certain service levels (CIR), with typical CIR rates of 8 Kbps,64 Kbps,128 Kbps,256 Kbps,512 Kbps,1Mbps and 2 Mbps.

Product Advantages

• Low latency, able to deal with bursty and heavy traffic
• Stable and reliable communication quality
• Providing different service levels
• Efficient
• Low cost

Product Value

• rapid and stable access
• cost-effective

ATM network uses the asynchronous packet and time division multiplex mode to transfer data in fixed size cells. It can transmit data of different rates (usually above 512 kbps) and has circuits with different level of QoS guarantee. It is designed to efficiently support various types of traffic, including end-to-end voice, data, graphics, and multi-media communications and the connection between user end and data network (e.g. the Internet).

ATM PVPC (Permanent Virtual Path Connection) CBR (Constant Bit Rate) offers highest performance among all ATM services. It can guarantee data throughput and latency. Compared with dedicated line services, it is an economical alternative solution to support voice, video and data applications.

• Local PVPC-CBR: It provides two-point or multiple-point high-speed local connection, equivalent to high-speed and high quality local dedicated-line connection between two points or among multiple points.
• Domestic Long-Distance PVPC-CBR: It provides two-point or multiple-point high-speed long-distance connection, equivalent to high-speed and high quality dedicated-line connection between two points or among multiple points across cities or regions.
• ATM-VPN: It uses ATM technology to provide VPN services for difference branches of the enterprise.

Target Customer
Medium-sized or large enterprises, especially enterprises or organizations with frequent business activities, large data traffic, high reliability upon the network and with branches and subsidiaries, e.g. network companies, IT, finance, securities, insurance, manufacturing, transportation, trade, news agencies, etc.

Features

• Flexibility. It can allocate circuit bandwidth dynamically by dividing one physical transmission channel into several sub-channels supporting services of different rates.
• High speed. ATM simplifies protocol control and reduces latency. The 2Mbps-622Mbps transmission rate can satisfy requirements of LAN and WAN.
• Multiple services. As a multiple-service access platform, ATM network can meet the requirements of data services at different rates, including data, voice and graphics
• Reliability. ATM network offers a good quality guarantee mechanism to deliver real-time services such as video-on-demand.
• Security. The bandwidth for users is separate; therefore the security risks are eliminated such as illegal intrusion caused by bandwidth sharing.

Strengths

• Fixed private bandwidth. The bandwidth is fixed for the user no matter he uses it or not.
• Short latency. It is an ideal choice for voice, video and latency-sensitive applications.
• High availability. It is suitable for key service applications.
• Users can increase bandwidth of CBR services smoothly. In comparison, it requires huge investment to upgrade the bandwidth of dedicated-line services from 2Mbps to 34Mbps or from 1.5Mbps to 45Mbps. Thus, CBR is a more economical and effective solution for users for they can smoothly upgrade the bandwidth according to their specific needs.
• Good network coverage. China Netcom can offer services via such lines in major countries in the world and in county-level cities in China.
• Users can have voice, data and TV conference communications via such lines.

Values

• It serves as the bearer platform for telecom switching network.
• It serves as the core platform for data network (e.g. DDN FR) to bear different circuits (e.g. DDN circuit, FR PVC, etc.).
• It connects with the interface of customer terminals accessed via the optical fibre (connected with MODEM) or optical transceiver.
• It provides voice, data, graphic, and multi-media communications and serves as the transport media for ISP, IDC access to the Internet.
• ATM-VPN connects LANs of different branches and offices with the LAN of the headquarters to deliver data transmission, E-mail and voice services within the enterprise.

Network Resources
China Netcom owns long-distance trunk-line resources, local access resources of 10 northern provinces, and some business and development areas in major cities in the south. It also owns independent FLAG cables and satellite transmission resources. It has POPs in Hong Kong, Taiwan and U.S. China Netcom also signed cooperation agreements with over 10 telecom operators in the world.

China Netcom's IP-VPN is a telecom service that adopts advanced technologies to create Virtual Private Network of an enterprise with Internet as the medium. There are three types of IP-based VPNs: MPLS-VPN, IP-VPDN and SVPN.

• MPLS-VPN is a service that adopts Multi-Protocol Label Switching technology to create an internal private network of an enterprise so as to channel communication of data, voice and image between different divisions of the enterprise.
• IP-VPDN is a dialing-based Virtual Private Network service. The user dials a telephone number to establish a virtual link with public network so as to access Internal data resources of an enterprise.
• SVPN Security VPN is built on X.25, frame relay or ATM networks. It enhances the function of a system from security perspective and focuses on the security of the VPN. IPSec VPN and SSL VPN are two typical types of SVPN.

Target Customer

• The service is targeted at large and medium-sized enterprises, especially those companies and organizations with frequent business activities, large data communication volume, high dependency on network and local branches, such as network company, IT company ,financial institutions, trade companies as well as news agencies.
• The service also provides employees, clients and partners of an enterprise with access to the internal network of the enterprise so that the employees may work at home or on a business trip.

Features and Strength
MPLS-VPN

• Powerful and flexible scalability. The network may be home to a number of VPNs and users in the same VPN can be easily extended.
• Easy network roll-out and maintenance. The router at the client is connected with the router at the local POP of the network operator rather than every location of the client network. VPN information is saved on the operator's router and managed by the operator. Therefore, the user does not have to maintain and manage the information by himself.
• Assured quality of service. Different classes of service ensure the quality of communication, accelerate packet transport rate, reduce jitter and latency, enhance network throughput and thus improve network quality.
• Integration of multiple services. To apply a single service of MPLS-VPN, the user will be able to enjoy data, voice, video and other services.
• Security and reliability. With the cutting edge technology of MPLS as the tunnel mechanism, transparent text transport is realized. MPLS's Label Switching Path (LSP) enjoys equivalent security as FR and ATM VCC.
• Support of existing network planning. MPLS-VPN does not have special requirement ob client equipment. Ordinary routers will be applicable. So the user can continue to use his own equipment. MPLS-VPN supports private address, so the user does not have to change their address planning scheme.
• Synchronous access to the Internet. With a bundled Internet access service, a physical circuit may access both VPN and the Internet simultaneously so that the user may enjoy an upscale bandwidth.

• VPDN service adopts L2TP protocol defined by the IETF as its tunnel protocol. The adoption of tunnel technology and the encryption of the data to be transported through the tunnel so that the data can only understood by designated senders and receivers, which enhances the confidentiality and security of the data.
• With VPDN,a private network may be created utilizing the Internet. Significant cost in equipment and dedicated line is saved. The user only needs to pay for the limited cost in local call and the Internet and dose not have to bear the cost brought about by the upgrading of technical equipment.
• The enterprise doe not need to set up its own private network maintenance system. System maintenance and upgrading will be transferred to professional service providers.
• Employees on business trips can still access enterprise information which ensures the mobility and easy access of the data.

• Authenticity of the connection. The user's ID need to be authenticated.
• Boundary security of the connection, i.e. the authorization of legal users. The security of boundary data, i.e. the protection of the data. The usability of the boundary.
• The integrity of the connection, i.e. the integrity of the connection itself as well as that of the data in transport during the connection.
• Confidentiality of the connection. The process and existence of the connection is unknown to outsides. Even if they get to know them, they are not able to decode the data.
• Alarming function.
• Centralized management, i.e. the controllability to meet the demand of the user.
• The security of security equipment, e.g. anti-pry and heat-proof features. The security of operating platforms and system architecture.

Values

• Low-cost. Inexpensive network rollout and operation saves significant costs for the user.
• Ease of use. The employees can access the enterprise private network anywhere with Internet access.
• Information security. With relevant encryption technologies, the branches (employees) may be interconnected with the headquarters with secure information.

Network Resources
China Netcom owns long-distance trunk-line resources, local access resources of 10 northern provinces, and some business and development areas in major cities in the south. It also owns independent FLAG cables and satellite transmission resources. It has POPs in Hong Kong, Taiwan and U.S. China Netcom also signed cooperation agreements with over 10 telecom operators in the world.