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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.
Floor 2
Existing Phone
Floor 1
Lines to Clients
Punch Down
Blocks /
Patch Panels
VDSL Lines
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.
Telephone
VDSL CPE
Telephone/Fax
VDSL CPE
VDSL Switch
Phone Lines
ess
TM
EE
Switch
6 M
/
V S
W
TigerAcc
S M
C 7
8 1
POTS
18
E
O
ESD
PORT
E
17
O
Mgmt
Line
5
13
9
E
Power
Console
1
2
6
10
14
O
17
Diag
Fault
3
7
11
15
E
18
Mgmt
4
8
12
16
O
-
50 60Hz
-
1A
100
240V
Multi-dwelling/Multi-tenant Building
Figure 1-1 VDSL Application
Rooms/Clients
Rooms/Clients
Local Servers
(Locally Hosted Services,
Video Servers, Billing)
MPOE
PBX
Fiber Optic Link to ISP
O
VERVIEW
Telephone Line
Central Office
from Central Office
(PSTN)
ISP
(Internet)
1-3
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