Specifications

9
1 Introduction
1.1 Descriptions
The EFM Based Network Extender (or EFM Bridge Modem) provides a flexible and friendly
solution for the Ethernet based services provision to subscribers by the service provider.
Additionally, this family of products provides a simple point-to-point deployment and
configuration. This allows broadband service providers to deploy single DSL lines
economically when required for low density geographical areas or during start up phase.
EFM Network Extender provides cost-effective symmetrical bandwidth at rates up to 22.8
Mbps (for 4-pairs model) which allows service providers to deliver friendly Ethernet services
rapidly. EFM Network Extender extends the reach of Ethernet services to the sites with no fiber
access by using bonded copper pairs. Designed with standards-based EFM technology
(2BASE-TL), the delivery of Ethernet services with EFM modem can be deployed quickly on
the existing copper plant. It provides an affordable solution for point-to-point connection
between remote office and enterprise headquarters.
EFM Network Extender implements the management features based on IEEE 802.3ah standard
and enables users to significantly reduce operational expenses by eliminating unnecessary
transformation between Ethernet and legacy ATM network. Being based on user-friendly
Ethernet, it saves time and costs by simplifying engineering tasks without additional training
costs. The EFM architecture utilizes 100% packet transmission technology for optimum
throughput and reliability. With a compact form-factor design and optimization for the use over
existing copper network, EFM Network Extender reduces the initial investment cost and
deployment time in delivering higher speed Ethernet service. It provides minimal risk bearing
and quick return on investment to service providers and enterprises.
EFM Network Extender can bond up to 4 pairs and deliver up to 22.8 Mbps Ethernet services to
all users within their service area by utilizing existing copper infrastructure and EFM 802.3ah
PAF bonding technology. Service providers and enterprises are able to offer symmetrical high
speed connectivity for transparent Ethernet service on DSLAM backhaul or Wireless backhaul
and more.
EFM Network Extender provides future-proof features meeting Ethernet Quality of Service
(QoS) requirements by utilizing 802.1q VLAN capabilities, four levels of priorities, traffic flow
control and rate control. These traffic management and QoS features enable service providers
to offer highly profitable and value-added services to a vast majority of business and
institutional sites.