OVERVIEW

VDSL Technology

VDSL2 (Very High Bit-Rate Digital Subscriber Line) is at the high-end of all the DSL technologies, offering the best combination of fiber optic and copper to provide high-speed broadband Internet access. VDSL’s primary application is in providing a broadband data service to multi-tenant residential or commercial buildings. In this implementation, fiber optic cable carries data from an Internet Service Provider to the building; then the installed telephone copper wires take the data and deliver it to individual units within that building.

 

Telephone

 

Rooms/Clients

 

VDSL CPE

 

Floor 2

 

Telephone/Fax

 

Rooms/Clients

Existing Phone

VDSL CPE

Floor 1

Lines to Clients

 

 

 

 

Local Servers

 

 

 

 

 

(Locally Hosted Services,

 

Punch Down

 

 

Video Servers, Billing)

 

 

 

 

 

 

Blocks /

 

VDSL Switch

 

 

 

Patch Panels

VDSL Lines

 

 

 

 

 

MPOE

 

 

 

 

 

Telephone Line

 

 

 

Phone Lines

 

 

 

 

 

from Central Office

Central Office

 

 

 

 

 

 

 

 

 

(PSTN)

 

 

 

PBX

 

 

 

 

 

Fiber Optic Link to ISP

 

 

 

 

 

 

ISP

 

 

Multi-dwelling/Multi-tenant Building

 

(Internet)

 

 

 

 

Figure 1-1 VDSL Application

VDSL provides high-speed Internet access over existing phone lines by making use of previously unused frequency bandwidth above the voice band (i.e., up to 30 MHz with VDSL2). By placing VDSL signals above the frequency of the voice signal, a VDSL service can coexist on the same line as other telephone services. VDSL can operate symmetrically, providing the same data rate in both directions, or asymmetrically, providing a higher data rate in the downstream (receive) direction than in the upstream (transmit) direction.

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SMC Networks VDSL2 manual Vdsl Technology, Vdsl Application