ZyXEL Communications NSA221 Manual de usuario descargar pdf (Pagina 8)

14 15

Future-oriented, Economic Investment: It

preserves capital investment by enabling

operators to deliver new revenue-generating

services with the infrastructure they already

have. Furthermore, it dramatically reduces

the trouble and expense of installing  bre-

optic cables by using existing, pre-installed

bundles of twisted-pair cable to deliver

broadband network access in the  rst mile.

With the ZyXEL IES-708-22A G.SHDSL.bis,

an 8-port IP DSLAM, it is possible to

create symmetrical connections by using

port bonding. Bundling up to eight pairs

of copper wires makes point-to-point

connections of up to 45.6Mbps possible.

When a link fails, the data tra c is

distributed to the remaining connections

within the group by means of the multi-

EFM - G

End-to-end Solution with EFM

Today‘s carriers are eager to connect business customers

to their metro networks. The G.SHDSL EFM (Ethernet-

in-the-First-Mile) technology is the best solution for

enterprises demanding a certain amount of transmission

over symmetric bandwidth.

Ethernet-to-theEnd Customer

EFM, also known as IEEE 802.3ah, is a

mature technology for delivering symmetric

bandwidth to businesses, government

o ces, and organisations with multiple

locations (cell sites). It allows continuous

standard Ethernet network coverage across

the globe, eliminating non-native transport

such as Ethernet over ATM from access

networks. EFM delivers up to 5.7Mbps per

line with standard equipment supporting

up to 8-way bonding. It o ers a relatively

high-performance connection with up to

45Mbps bandwidth symmetrically with high

stability, low delay and low packet loss.

G-SHDSL EFM has the advantage of

maximising the performance of copper

wire with higher speed and longer distance

coverage. By leveraging pre-installed

bundles of twisted-pair cable to deliver

 rst-mile broadband network access,

ZyXEL’s bonded G.SHDSL solution with EFM

smoothes the issue of  bre-optic cable

installation. In addition, it o ers di erent

bandwidth packages by using the G.SHDSL

bonding technology. It is the best solution

which enables carriers to expand their

service o erings in a high-margin enterprise

market.

The use of IP over Ethernet in subscriber

access applications eliminates unnecessary

network layers. It reduces the number of

network elements in a network and the costs

of equipment, operations and complexity.

Simple architectures are always easier to

manage especially in this complicated

central environment. In the  rst mile, native

Ethernet on copper or optical  bre networks

o er signi cant cost-e ective advantages

compared with other technologies. IP/

Ethernet networks coexist with time-

division multiplexing (TDM) services.

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pair bonding function (ITU G. bond or ITU

G.998.1) between two IES-708. When the link

becomes available again, it is automatically

reintegrated into the group. Di erent or

unsteady line quality within the group does

not cause any interruptions. The ZyXEL

IES-708-22A can – depending on the

 rmware which is loaded – be used either

as a STU-C (IP-DSLAM) or STU-R (end device).

ZyXEL’s P-792 G.SHDSL.bis models comply

with the ITU-T 991.2 G.SHDSL and G.SHDSL.bis

standard and IEEE 802.3ah. They o er

superior reliability of Ethernet connectivity

with unmatched rate and reach. The P-793

complies with ITU-T G.998.1 (G. Bond)

support for the 4-wire bundle for higher

bandwidth and longer distance.

Service Providers‘ Bene t

By employing ZyXEL’s end-to-end G.SHDSL

solution with EFM for business customers

on customer premises, service providers

can quickly and cost-e ectively roll-out

pro table broadband services to businesses,

governments, schools and other

organisations by ful lling the demand of

higher bandwidth with manageable costs.

Location

ZyXEL product list for

end-to-end G.SHDSL with EFM

Photo

At CO site

IES-6000 with SLC1348G-22

(SLC1348G-22)

IES-5000 with SLC1348G-22

At remote

site

IES-5005 with SLC1348G-22

IES-1000 with SAM1316-22

subscriber

building

IES-708-22A

subscriber

site

P-791R v2 Gateway

P-792H v2 Security Gateway

P-793H v2 Bonding and Security

Gateway

IP Core

Network

Active Fibre GW

FSG1100H

CO MSAN

IES-6000/IES-5000

Compact DSLAM +

G.SHDSL.bis Extension Module

IES-1000 + SAM 1316

Remote MSAN + 48-port EFM/ATM

G.SHDSL/G.SHDSL.bis Line Card

IES-5005 + SLC1348G

G.SHDSL.bis GW

P793 v2/P792H v2

G.SHDSL.bis GW

P793H v2/P792H v2

S-

P-700 ser

ETHE

NET

DSL

PWR/SYS

ES-5005

P-700 ser

ies

ETHER

INTERNET

PWR/SYS

EFM EFM

EFMEFM

Example of G.SHDSL EFM Technology Scenario

1 2 3 4 5 6 7 8 9 10 11

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