RAD unveils new Ethernet access strategy and more
Galloping world-wide demand for mobile voice and data communications
is making the volume and expense of cellular backhaul
a paramount issue for mobile network operators, as well as for the carriers
who frequently provide the transport links. Dominic K reports from Israel.
The complications of operating both 2G and 3G cellular equipment
while migrating from 2G circuit-switched transport networks (TDM) to 3G packet-switched
networks known as ATM initially and eventually as Gigabit Ethernet/IP/MPLS)
raises further challenges.
This year RAD shall unveiled the worlds first-to-market
pre-standard implementation of ITU Y.1731 and IEEE 802.1ag. The standard defines
end-to-end, carrier-class Operations, Administration and Maintenance (OAM) tools
for Ethernet networks. These new capabilities will help enable Ethernet service
providers to proactively monitor their service end-to-end. Such a solution can
minimise operational expenses and also allows guaranteeing Service Level Agreement
(SLA) with customers.
At ITU Telecom World 2006 in Hong Kong, RAD Data Communications
will unveil the EtherAccess, that deliverers both Ethernet and emulated services
over any infrastructure providing carriers and their customers with a cost-effective,
standards based system for delivering a uniform user experience with verifiable
RAD Operations Center
EtherAccess can fulfill three major Ethernet service
requirements, explains Zohar Zisapel, Chairman, RAD Group First,
by providing Ethernet services over a broad variety of access technologies,
EtherAccess increases revenues by allowing Ethernet service providers to reach
He further explains, Second, it provides end-to-end
service control and SLA measurement tools, and third, it enables the migration
of legacy services to packet networks to reduce cost and prevent customer churn.
This is something that is especially important for carriers that do not own
large TDM or ATM-based infrastructure.
EtherAccess is based on the deployment of Network Interface Devices (NIDs) at
the customer premises. These Ethernet NIDs mark an intelligent demarcation between
user and operator networks and, in so doing, allow for end-to-end service control
and SLA verification. This strategy will extend the service providers
reach and control over fiber, copper and wireless links while facilitating management
of differentiated services, including interoffice LAN connectivity, Internet
access and virtual private networks (VPNs).
To further ensure the connectivity across a variety of access technologies,
RADs EtherAccess strategy incorporates separate product solutions enabling
Ethernet over fiber, Ethernet over SDH/SONET and Ethernet over copper (DSL).
This ensures that the provider will be able to supply the same Ethernet service
attributes and the user will receive the same Ethernet experience regardless
of the transmission media.
EtherAccess platforms is also a mechanism that can monitor SLA parameters such
as frame delay, frame delay variation (jitter), frame loss, and availability.
The SLA verification mechanism records both SLA values over time and actively
warns when values exceed the predefined SLA objectives and parameters.
In 2007 RAD plans to expand its EtherAccess strategy to incorporate its Link
Access family of Integrated Access Devices (IADs) for transporting Ethernet
over DSL and, subsequently, Passive Optical Network (PON) and wireless access
Pseudowire solutions are rapidly becoming a must-have element
in carrier portfolios to ensure a complete multi service offering over packet-based
networks and carriers, on the other hand want the widest possible range of choices
in deciding which TDM pseudowire as the best support solution to their application.
Apart for the EnterAccess TDM, pseudowire gateways are unique because they will
incorporate Application Specific Integrated Chip (ASIC), developed by RAD. This
which supports Structure Agnostic TDM over Packet (SAToP) and the two IETF informational
RFCs such as Circuit Emulation Service over Packet Switched Network (CESoPSN),
and TDM over IP (TDMoIP) should give carriers the much needed technological
In addition, the new devices will support HDLCoPSN, an IETF standard, optimising
bandwidth for High level Data Link Control (HDLC) based services such as Frame
Relay, X.25 and serial data traffic over packet-based networks.
Pseudowires enable carriers and enterprises to run voice, video, and legacy
data over packet-switched networks (PSNs), such as Ethernet, MPLS and IP, thereby
minimizing network maintenance and operating costs. Transparent connectivity
over Ethernet/IP/MPLS maintains all features and functionality of the legacy
network, including CAS and CCS signaling
Sophisticated Clock Recovery
Since highly accurate TDM clock recovery is the paramount
issue for TDM circuit emulation, RADs third-generation ASIC also incorporates
an advanced adaptive clock recovery mechanism, with accuracy of 16 parts per
billion (ppb), conforming to G.823 traffic and synchronization specifications.
Pseudowire technology in the access is win-win-win for incumbent carriers as
well as alternative carriers, data service providers and customers. It does
not require any forklift equipment upgrades or staff retraining. Any high-speed
last mile access network, wireless, DSL, cable, fiber or PON, can be leveraged
to deploy traditional leased line services, PSTN access over packet or even
RAD was founded in 1981 and is a member of the RAD Group of companies. The organisation
leads in telecommunication networking and internetworking product solutions.