Community Broadband: Technologies
The Culture of Broadband: Commentary
The culture of broadband is still emerging, rather than already fully formed. To some degree,
distributed peer-to-peer services and pay-per-use services are conflicting with each other.
Even after being acquired by Bertelsman, Napster is still off the wires, because the underlying
conflict between freedom and control is hard to resolve. Technologies and their applications
are still in search of a stable configuration. However, concerted action will be necessary to support the good,
avoid the bad and battle the ugly.
ISP backbones stand up in gruelling 30-day performance test.
It's time to lay to rest the notion that ISPs can't deliver telephone-company-level reliability.
The fact is, some routed IP network backbones now meet or exceed telco-grade performance.
Internet Glossary: Telus
Sometimes it is useful to understand what all the terms
HIgh Speed Technology of the
An Overview Guide ( pdf )
Optics: The Basics of Fiber Optic Cable: A
There are three types of fiber optic cable commonly used: single
mode, multimode and plastic optical fiber (POF). Transparent glass
or plastic fibers which allow light to be guided from one end to
the other with minimal loss.
microstructured polymer optical fibres (MPOF): Sept 3,
allows the manufacture of optical fibres that are much smaller,
cheaper, more rugged and easier to make than glass fibres because,
in part, they don't need the added weight of protective
Surface Inlaid Fiber:
At TeraSpan, we've changed the way fiber optic cable is deployed.
Our unique, patent-pending "Surface Inlaid Fiber" has raised the
bar in fiber installation by significantly reducing the time and
costs involved in deployment. TeraSpan provides the fastest, most
economical fiber deployment ever.
A companion page that provides a wide range of annotated
references dealing with wireless broadband.
Gas Pipelines Will Get You to Serve the
In a very interesting development, Sempra Fiber Links, a
subsidiary of Sempra Energy announced the first installation of
its proprietary technology that allows fibre-optic cable in live
natural gas distribution lines. The new fibre line has been
installed in a portion of the service territory of Frontier
Energy, a natural gas distribution utility in North
We've developed a new and exciting process to safely route
fiber optic cable and conduit to buildings through existing,
live natural gas pipelines. That's right. Active, live natural
gas pipelines. So fiber optic networks can easily go places
difficult to reach before. Faster. With less excavation and
Very High Speed Digital Subscriber Line transmits data in the 13
Mbps - 55 Mbps range over short distances, usually between 1000
and 4500 feet (300 - 1500 meters), of twisted pair copper wire.
The shorter the distance, the faster the connection
DSL's fast? Watch VDSL:
The next generation of broadband came closer last week when
Californian chip company Ikanos demonstrated Ethernet at 50
megabits per second (mbps) download speeds over a kilometer of
- Copper Access to the Information
( Early Draft ):
One of the enabling technologies for FTTN is Very high rate
Digital Subscriber Line, or VDSL. In simple terms, VDSL transmits
high speed data over short reaches of twisted-pair copper
telephone lines, with a range of speeds depending upon actual line
length. The maximum downstream rate under consideration is between
51 and 55 Mbps over lines up to 1000 ft (300 meters) in length.
Downstream speeds as low as 13 Mbps over lengths beyond 4000 ft
(1500 meters) are also in the picture. Upstream rates in early
models will be asymmetric, just like ADSL, at speeds from 1.6 to
2.3 Mbps. Both data channels will be separated in frequency from
bands used for POTS and ISDN, enabling service providers to
overlay VDSL on existing services. At present the two high speed
channels will also be separated in frequency. As needs arise for
higher speed upstream channels or symmetric rates, VDSL systems
may need to use echo cancellation.
The VDSL Alliance is composed of a number of companies who are
working together to write a specification for VDSL based on the
discrete multi-tone (DMT) line code.
Offical Web Site:
To rapidly specify a low cost, high capability end-to-end
multi-service network based on VDSL Frequency Band Plan 998 which
can be quickly and economically deployed to enable customers,
focusing principally on consumer market, to benefit from
competition, under the general framework of FSAN (Full Service
Access Network) Consortium.
boldly goes where none has gone before to uniquely unleash the
true digital capacity and financial potential of the existing
broadband plant at comparable prices to today, without changing
the plant and without forklift upgrades. The same chipset, with
the same Wavelet Engine, can be utilized for different application
spaces such as twisted pair copper, coaxial cable, wireless, power
line, etc. It is applicable to multiple applications such as
high-speed remote access, high-speed local access, etc. It is also
frequency agnostic, applicable to any frequency range.
Current News and references regarding DSL
discussions of all broadband issues in
Point to Point Protocol over Ethernet is a proposal specifying how
a host personal computer (PC) interacts with a broadband modem
(i.e. xDSL, cable, wireless, etc) to achieve access to the growing
number of Highspeed data networks. Relying on two widely accepted
standards, Ethernet and the point-to-point protocol (PPP), the
PPPoE implementation requires virtually no more knowledge on the
part of the end user other than that required for standard Dialup
Internet access. In addition, PPPoE requires no major changes in
the operational model for Internet Service Providers (ISPs) and
Innovation of Long-Reach Ethernet ( LRE
Cisco Long-Reach Ethernet (LRE) broadband networking
solution&emdash;the industry's first end-to-end product line for
delivering 5-15 Mbps performance over existing Category 1/2/3
wiring. With Ethernet-like performance that reaches up to 5,000
feet, LRE enables simultaneous voice, video and data applications
without the need to rewire. Implementation
Labs estimates theoretical capacity of fiber at 100
Scientists from Lucent Technologies' Bell Labs published a paper
in the British journal Nature in which they estimate the
theoretical capacity of a standard, commercially available fiber
strand is approximately 100 Tbps. Current commercial DWDM systems
operate at under 2 Tbps and lab experiments have shown the
potential for 10 Tbps systems. Previous estimates for fiber
capacity have ranged from 50 &endash; 350 Tbps. The Bell Labs
study took a multi-disciplinary approach to calculate the
theoretical spectral capacity. [Current peak capacity is 10.9
Tbps at 270 wavelengths at 40 Gbps per wavelength -BSA]
( June 28, 2001 ) , Nature:
"Glass ceiling fixed"
( June 2001 )
Sewer Access Module
Company officials say the robot-assisted work is about 60 per cent
faster than traditional fibre-optic installations and costs about
half as much. And there's a hidden, longterm benefit of avoiding
is a two-way, always-on, high-speed satellite Internet
Communications Corp: Wireless at the Speed of light
Reliable, high bandwidth, wireless network access for "the last
mile". fSONA Corporation has developed the industry's premiere,
laser-based, optical wireless transceiver technology. This
technology forms the cornerstone of the SONAbeam series of
products. Our goal is to become the supplier of choice, when you
are looking to implement broadband, short haul, wireless
telecommunications facilities - "the last mile"
Systems: Cisco has created a new IP+Optical architecture for
Service Providers which extends high speed IP services to the edge
of the network.
Optical Ethernet is at once a vision and a reality. With an
innovative portfolio of products, Nortel Networks enables the
Optical Ethernet within the Metropolitan Area and connects it to
an agile optically switched backbone network.
Networks: Optimized for carriers and providers, the Redback
SmartEdge multi-service optical platform is a powerful optical
networking platform designed to help improve the economics of
SONET/SDH transport networks.
Every few decades, a fundamental building block technology is
discovered that enables entirely new products and even new
industries. Just as the vacuum tube, the transisor and the laser
revolutionized the past century, Time Domain®'s PulsON®
technology is poised to usher in a new era that creates vast
imporvements in wireless comunications, radar and
Using advanced satellite technology, Teledesic and its partners
are creating the world's first network to provide affordable,
worldwide, "fiber-like" access to telecommunications
Inc. BCD.V now Urban Communications Inc. and Urban
Networks Inc. UBN.V Is a full spectrum telecommunication
infrastructure contractor that offers specialized technical
services to the major established and new telephone, cable and
wireless telecommunications companies, public utilities and
residential housing developers in Canada. These services include
the design, engineering and construction of long distance fibre
optic networks, distribution systems to facilitate delivery of
video, telephone and internet services to multiple unit
residential and commercial buildings, service and maintenance of
networks and building systems, and installing customer premises
equipment to end customers of service providers.
Dixon Networks Corporation, formerly known as Dixon Cable Laying
Co, Ltd., was incorporated in 1966 and has been under its present
ownership since 1976. While our early focus was on communications
network construction development, for example we introduced the
first cable plowing machines to British Columbia, today we provide
the highest level of quality and performance in engineering,
construction, project management and support services to our
Our North American network is one of the largest on the continent,
providing seamless connectivity between major cities throughout
the United States and Canada. More than 36,000 kilometers (26,000
miles) of the network have been completed, of which approximately
23,000 kilometers (14,000 miles) are lit and ready for service. In
addition, 13 metropolitan networks in the United States and Canada
The service: 100 Mbps of non-oversubscribed, unlimited Internet
access for a flat $1,000 (US) per month ( Seattle ). Cogent takes
the best systems, suppliers, technologies, and business processes
and blends them in new ways to deliver Internet access at
unsurpassed speeds, reliability and value for its end users. We
don't pretend to offer everything to everyone. As a new-economy,
facilities-based ISP, Cogent offers service only to business
customers occupying large multi-tenant buildings. It's a
remarkable value. And a tremendous advantage for our customers.
Cogent will own a 12,400-mile, fiber-optic network consisting of a
national, non-blocking OC-192 backbone and multi OC-48
Metropolitan Area Networks (MANs) located in all major U.S.
a collection of web resources about cable modem systems, including
manufacturers, system trials, articles, and papers.