TAILIEUCHUNG - Ethernet over VDSL

VDSL (Very high data rate Digital Subscriber Line) is a broadband transport technology for twisted copper pairs operating at data rates of up to Mbit/s with corresponding maximum reach ranging from 1000 feet (300 meters) to 4500 feet (1500 meters) of 24 gauge wire. VDSL offers tremendous promise as a means to provide the next generation of high-speed networking technology over copper telephone lines. | Ethernet over VDSL White Paper 1. Introduction VDSL Very high data rate Digital Subscriber Line is a broadband transport technology for twisted copper pairs operating at data rates of up to Mbit s with corresponding maximum reach ranging from 1000 feet 300 meters to 4500 feet 1500 meters of 24 gauge wire. VDSL offers tremendous promise as a means to provide the next generation of high-speed networking technology over copper telephone lines. VDSL is referred to as a last-mile technology as it is used for inter-connections between a telephone switching station and a home or office and is not used for interconnecting switching stations. 2. VDSL Benefits Highest-rate DSL technology available Support for Symmetric and Asymmetric modes of operation Up to 52 Mbit s downstream over single copper twisted-pair loop Coexistence with Voice Home networking or LAN over regular telephone lines The dominant physical access medium based on copper loop for MTU Multi Tenant Unit and residential applications 3. VDSL Applications Digital Video broadcast Video-on-demand Video conferencing and Voice over IP LAN to LAN connection over the existing telephone wires 4. VDSL Deployment Scenarios Possible deployment scenarios for VDSL are Fiber to the Exchange FTTEX Fiber to the Neighborhood FTTN Fiber to the Cabinet FTTCab and Fiber to the Building FTTB . In FTTEX all subscribers are within close range of the Central Office CO . FTTN and FTTCab are appropriate for VDSL termination in DLCs and NGDLCs. FTTB can bring fiber directly into buildings such as MDU and MTU where VDSL is terminated. Teledata NETWORKS Teledata NETWORKS Premises Distribution Net Mbit s Figure 1. VDSL Deployment Scenario July 04 Ethernet over VDSL As demonstrated in Figure 1 VDSL technology enables transmission of high-speed traffic between the Network the ONU and end user premises over the existing telephone lines. The VDSL CPE on the user side is connected to VDSL ONU over a twisted copper pair. The .

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