SMC Networks VDSL2 - Manual (Page 23)

O
VERVIEW
1-3
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.
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.
ISP
(Internet)
Central Office
(PSTN)
Punch Down
Blocks /
Patch Panels
PBX
Telephone/Fax
Telephone
VDSL CPE
VDSL CPE
Telephone Line
from Central Office
Fiber Optic Link to ISP
Local Servers
(Locally Hosted Services,
Video Servers, Billing)
Existing Phone
Lines to Clients
Multi-dwelling/Multi-tenant Building
Floor 2
Floor 1
Rooms/Clients
Rooms/Clients
VDSL Lines
Phone Lines
VDSL Switch
MPOE
100 240V 50 6 0Hz 1A - - Con sole 1 2 3 4 5 6 7 8 9 10 11 12 14 13 15 16 17 E O 18 E O Pow er Fault Diag Mgm t
Line Mgm t O E 17 O E 18 POTS ESD POR T S M C 7 8 1 6 M V S W / TigerAccess EE Swi tch TM