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Overview
EFM media
14
EtherXtend User's Guide
•
any point-to-point application requiring Ethernet connectivity over the
WAN
The EtherXtend can be used to create a point-to-point connection over a dry
copper pair. Within a campus environment or multi-tenant unit (for example, a
hospital) where the subscriber owns the cabling infrastructure, copper pairs
are often available throughout the facility as unused telephone cabling.
Any cell site running EvDO CDMA or 3G provides an Ethernet interface for
mobile applications such as mini-web browsing. Typically, these Ethernet
ports are connected to a T1 router so they can be carried over long distances to
the CO where they are terminated into Ethernet.
The EtherXtend platforms not only provide a more cost-effective alternative
to deploying dedicated T1 router equipment at each cellular tower, but they
also provide loop bonding capabilities to reach the higher bandwidth demands
of EvDO and 3G.
The Ethernet port of the cell tower simply connects to the appropriate
EtherXtend platform, and the Ethernet frames are transported directly to four
SHDSL lines. At the CO, the extended LAN connection presents a single
Ethernet RJ-45 interface for simple connectivity to the data network.
Loop bonding allows multiple physical lines to be grouped together to achieve
higher data rates. For example, four 5.7 Mbps SHDSL lines can be combined
to provide up to 20 Mbps of bandwidth. Loop bonding is an easy way to
increase line speeds where extra copper is available.
Zhone's EtherXtend technology uses existing copper facilities to deliver high
bandwidth Ethernet services over existing copper loops to business
customers. Products from this technology are both EFM standards compliant
and compatible with existing bonded copper solutions to deliver
point-to-point Ethernet connectivity over the WAN.
EtherXtend transports Ethernet directly over SHDSL, T1, or E1. This makes it
easy to interconnect LANs over virtually any distance. These transparent
LAN services allow businesses with broadly distributed remote offices to
operate as if located on the same local network.
Copper wire access lines are the dominant access media today. While optical
fiber facilities appear to be gaining market share, the existing media (copper)
still is more dominant in terms of volume of footage, number of entry points,
and number of regions governed by a technology type.
EFM over copper services offers more than fiber class speed. They support a
wide range of applications and opportunities. EFM technology provides
benefits for installations provisioning high-speed, high-value services and for
users of those services who realize cost and performance improvements
delivered rapidly and flexibly.
EFM over copper applications include:
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