Vswitches provide broadband services for users based on cable

Currently, available broadband technologies include T-1, DSL and Ethernet-based man access. High cost of T-1 services, DSL is not available anywhere, especially if the user's location is too far away from the center, and the use of Metro Ethernet is limited to big cities. Now, a new technology allows enterprises to obtain dedicated, IP-based broadband connections through standard coaxial cable lines.

Generally, cable networks have some limitations that make them unsuitable for Enterprise access. First, the bandwidth is shared by end users, which means the service speed will be greatly reduced during peak usage. In addition, the cable architecture forces each user to wait for approval for transmission, affecting other real-time services. So far, cable operators can only provide "no commitment" services at 1 Mbit/s to 3 Mbit/s. This may be a reasonable solution for home users, and enterprises rely on reliable and robust connectivity for daily business communication.

One advantage of cables is the widespread release of hybrid fiber-optic coaxial (HFCs) networks. In the past few years, the operator has upgraded the HFCs network, reducing the number of users on the optical nodes, improving performance and increasing bandwidth capacity.

With the help of the upgraded HFCs, the new technology enables cable operators to provide dedicated bandwidth to each enterprise user. When using this system, each enterprise receives its own dedicated IP line. The downlink bandwidth of the line can be scaled from 5 Mbps to 40 Mbps, And the uplink bandwidth can be scaled from kb to 8 Mbps. Because the bandwidth is "locked" for every user, for users, the bandwidth is as dedicated as a T-1 line for seven days a week, 24 hours a day. This dedicated IP channel system consists of an IP exchange router installed in the head-end facilities of the cable system and a gateway IP router installed on the client. This type of system does not need to change the OCS network, so there is no infrastructure fee transferred to the user.

The core of this service submission platform is the Switch Router installed at the head of the cable system. This device is connected to a cable system and a switching system that provides data, voice and video services over Gigabit Ethernet. The exchange router sends an IP packet from the cable system header to enterprise users by means of orthogonal amplitude modulation.

In the Enterprise location, an Access Gateway decrypts the transmission stream, extracts the IP packets, and transmits them to the user through 100Base-T Ethernet. This system is designed to support Internet access and various Wan transmission streams, including email and key business applications.

Exchange routers provide IP service quality and traffic management functions based on standard mechanisms (such as differentiated services and Multi-Protocol Label Switching. Because this exchange router combines IP QoS with a transmission technology that provides a fixed bandwidth between the network and the user end, no additional devices need to be deployed that cause latency for the shared bandwidth arbitration. With the help of IETF QoS standards, the transmission stream seamlessly switches from the backbone network to the network edge, spanning the last kilometer to reach the user's physical interface using the general QoS signaling protocol.

This horizontal bandwidth makes enterprise services such as video conferencing, remote security monitoring, on-site backup, VPN, and VoIP services possible. The reliability of the network is guaranteed. The carrier can change the bandwidth dynamically at any time, and the bandwidth can be extended to 40 Mbps to meet the changing needs of enterprise users.

1. Wireless USB and cable-free USB are coming soon