Characteristics and Solutions of Broadband Access Networks

Broadband access networks are developing rapidly. With the increasing demand for networks, some high-tech access technologies are also emerging, here, we will introduce the features of the broadband access network and the design of related solutions. Beijing Netcom has been closely tracking the development of advanced communication technologies at home and abroad, and has been applied to broadband access networks such as LAN and ADSL. According to the needs of broadband construction, Beijing Netcom constructed a VDSL Broadband Access Network this year. This network uses large-capacity VDSL core switches, working group switches with small ports, and user access devices. It is a complete broadband access network system.

For the large-scale community or intelligent office buildings, hotels, Beijing Netcom adopts the multi-business exchange platform DHS-7000 provided by youxun Network (D-Link) as the core, multiple broadband access modes are provided for the following users through telephone lines or optical fiber cables. It can support different modules such as VDSL, ADSL, and LAN. for Small and Medium-sized hotels or communities, Beijing Netcom uses a 24-port VDSL switch as the core, provides broadband access networks through telephone lines. 24-way VDSL access, RJ-45 or single/Multimode Optical Fiber port, 10 M/100 M/M selectable uplink module.

Beijing Netcom for the user access end solution using DEV-301 products. The device bridges the VDSL and Ethernet networks and provides an RJ-45 Ethernet port and two RJ-11 ports. The CPE device can be installed on the desktop or wall. The device also supports POTS communication-including ISDN or digital phones-EthernetoverVDSL services can be provided on the same line through the built-in POTS splitter, it can also provide telephone services.

The Beijing Netcom VDSL solution has the following features:

◆ Network security protection is a very important issue in broadband access network security. It mainly includes the security of network equipment and the security of information circulating between the entire network. The security of network devices is mainly reflected in network-level redundancy, attack prevention of key devices, and address anti-spoofing. For information flows, they are mainly information encryption and decryption. DHS-7000 provides redundancy in management module and power supply, and supports SNMPv3 in network management, so that management information can be encrypted.

◆ Telecom-level business management Beijing Netcom VDSL network uses intelligent devices to enhance business management functions. It mainly includes multicast and ISP selection. The support for Multicast can be said to be very important. It is of great help to telecom to carry out video services and has played a huge role in traffic planning for the entire network. At present, as the telecom market becomes increasingly open, multiple ISPs are competing. It is very important for users to conveniently select broadband access network service providers, therefore, when many users build their own broadband access networks, they propose that ISP access can be distinguished.

◆ Perfect authentication policy because all VDSL products selected by Beijing Netcom support 802.1X, the overall solution can adopt the 802.1X Authentication System to implement end-to-end authentication management for each Broadband User.

◆ Convenient and flexible cabling because VDSL transmission media can use telephone lines with a transmission distance of less than 5Km, the Cabling Design is very flexible, that is, three or five types of lines can be used and the transmission distance is not limited.

1. Full explanation of Broadband Access Network Technology
2. Overview of broadband wireless access technology
3. FTTH leads the revolution in Broadband Access Technology
4. IP access network technology is under pressure
5. Analysis of core technologies of Broadband Access Networks