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Product >> DSL CPE >> VDSL >> Prestige 861H Series
Prestige 861H Series
DMT 3/4/5-band, ATM-based VDSL
Modem/Gateway
VDSL, the fastest offering of DSL,
provides significantly higher bandwidth
than other DSL technologies. VDSL technology,
which is similar to that of ADSL, uses
existing copper wires to deliver high-speed
data services.
The major issues with VDSL technology
are the line codes to be employed,
which can be divided into either single-carrier
or multi-carrier modulation schemes.
For example, QAM is the most widely
used form of single carrier systems
while DMT, the standard line code for ADSL,
is the primary form of multi-carrier modulation.
Both QAM- and DMT-based systems can be designed
for VDSL applications. However, DMT modulation
dynamically adapts the bit rate to conditions
on the local loop and offers excellent performance
even over noisy lines.
ZyXEL's Prestige 861H series, DMT-based VDSL modem
supports a complete range of speeds ranging
from 64Kbps to 25Mbps. Symmetric speeds for
the Prestige 861H series range up to 25Mbps
at 64Kbps increments while asymmetric speeds
range up to 52Mbps downstream and 26Mbps upstream
at 64Kbps increments. The built-in 4-port switch
allows multiple devices to share the bandwidth
without the cost of additional network hardware.
Benefits
DMT Modulation - Standard Compliance
and Outstanding Performance
The Prestige 861H Series is a DMT (Discrete
Multi-Tone)-based VDSL CPE. DMT modulation
dynamically adapts the bit rate to conditions
on the local loop and offers excellent
performance even over noisy lines. Network
administrators become free from manually
testing lines and from constantly adjusting
equipment to noise conditions. Both IEEE
802.3ah Ethernet in the First Mile (EFM)
Task Force and IEEE T1E1.4 Working Group
selected DMT as its worldwide VDSL line-coding
standard.
Bandwidth of over 25 Mbps Per Port in
Full Duplex
The high-bandwidth Prestige 861H Series
allows service providers to simultaneously
deliver a variety of value-added services,
such as broadband Internet access and multiple
streaming video channels. With the Prestige
861H Series, small to medium business users
can have much higher bandwidth for both
symmetric and asymmetric applications while
home users can enjoy interactive media-rich
entertainment which was previously unavailable.
Triple Play over Existing Copper Wires
With VDSL, traditional “copper wire?telecom
operators may begin offering “triple play?multimedia
services such as multiple high-quality
digital video streams, high-speed internet
access, and voice services in a way which
provides a user experience similar to today's
other existing distribution systems (cable,
terrestrial, satellite). New revenue can
be generated with a minimal amount of installation
time and expense.
Co-existence with Plain Old Telephone
Service (POTS), ISDN and Digital Phones
VDSL can be implemented quickly, even if
there is only one phone line per tenant.
The existing POTS or ISDN services may
be kept while adding new broadband services.
An Instant LAN with an Integrated 10/100Mbps
Switch
The combination of a switch makes the Prestige
861H Series more efficient and less expensive
than a similar unit with an external switch
or hub. The industry-standard HP Auto MDI/MDIX
features enable automatic and transparent
detection as well as automatic correction
of cables. Product installation, debugging,
and network maintenance become substantially
easier and significantly more efficient.
VLAN Supports QoS for Service Differentiation
The VLAN feature in the Prestige 861H Series
offers the benefits of both security and
performance. For example, various priorities
can be assigned to differentiate real-time
applications and Internet access applications
via VLAN tagging. Such control enables
service providers to turn on various broadband
services to a larger number of customers
more quickly and economically. |
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