Showing posts with label VDSL xDSL. Show all posts
Showing posts with label VDSL xDSL. Show all posts
May 13, 2013
Lantiq Sampling 3x3 MIMO For Faster VDSL Gateways
Supporting existing VDSL chip, extending bonding. Imran Hajimusa of Lantiq had a great demo of 4 HD channels streaming over WiFi a while back. They are now sampling and about to ship this improved WiFi, 3x3 MIMO 802.11n, a technology they purchased from Metalink. They've also upgraded their bonding capacity, which now can use VDSL profiles 17 & 30 for two line download speeds of 150-200 megabits over short loops. Their previous VDSL bonding could only do up to profile 8, for speeds under 100 megabits.
Telcos are screaming for reliable TV grade WiFi. I've heard claims as many as 50% of service calls are due to WiFi rather than DSL problems. When you carry you iPad to the bedroom upstairs, you don't want to lose the football game stream. Dirk Wieberneit of Lantiq reports raw WiFi speeds normally are fine, but don't often reach far enough into the home. The 3 antennas of their MIMO chips allow further reach with beamforming
Higher connection speeds require more processing power in the gateway. VTel discovered, for example, that nearly all home "gigabit" routers peaked out at about 300 meg. Since they are delivering a true gigabit. that wasn't acceptable. http://bit.ly/10ukHRp iPads and second multiple HD TVs around the house increase the local bandwidth needs.
Swisscom, using the related 4x4 MIMO, rarely has problems with wireless HD TV around the home. Hajimusa believed that in real environments the four antennas of 4x4 made little difference. The folks at Quantenna, shipping 4x4, disagree. I don't have results from the fields by carriers on the effectiveness of 3x3 MIMO and so can't judge.
Hajimusa is now at NXP as new management has taken over at Lantiq.
From the company.
XWAY™ VRX300 Family – Ultra-Fast Access Network Speeds With 200 Mbps Bonding and up to 150 Mbps Vectoring Paired With Industry-Leading Integration and Flexibility for In-home Networking
VDSL2-ready CPE system shipments are forecast by IHS iSuppli to grow from about 22 million in 2012 to more than 57 million in 2016.
While market Researchers predict strong growth rates for VDSL, Lantiq already today delivers leading edge VDSL2 systems. The Lantiq VRX300 Chip Set Family drives down system costs while improving access and in-home network performance. With the VRX300 Chipset, we are again raising the bar to help equipment providers meet ever tougher requirements and reinforce the competitive position of carriers.Monday, 13 May 2013 11:49
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Apr 13, 2013
Ikanos: Our 192 Port Vector VDSL Chips Are In Customer Tests
Builds custom chassis to show off 100 meg on every port. “Customers probably will delay volume deployments until late in 2014. Our chip is production ready and will be available well before that,” Kourosh Amiri of Ikanos tells me. It’s an impressive chip, designed for node scale vectoring of 384 ports. It does full cancellation of noise in all tones, which Ikanos claims is substantially more effective than the competition’s “partial cancellation.” A ten gigabit serdes is built in to support the high speed interconnect needed for this kind of performance.
(The picture shows Ikanos' reference chassis supporting 384 ports at 100 megabits.)
Contrary to Deutsche Telekom’s claims that it’s “impossible” to unbundle vectored VDSL, Ikanos is perfectly comfortable with two ISPs sharing the binder. “As long as the two DSLAMs are within about 50 meters, we can communicate between them and cancel noise on all lines,” adds Amiri. Telecom Italia and Fastweb have an official memorandum of understanding they will do just that. http://bit.ly/WR6tug Each is passing several million homes with fiber/DSL, often in the same node. Huawei, #2 DSLAM vendor to Alcatel, is understood to have the contract and presumably will choose Ikanos chips.
Ikanos is serious about interoperability. “If you manufacture VDSL chips, bring a board to our labs and we’ll be glad to test with you.” They claim they are working closely with their lead competitor and expect few problems in interop.
Promises, promises I’ve been hearing from everyone in VDSL for a decade, so I’ll remain skeptical of everyone’s claims until they are proven in the field.Thursday, 04 April 2013 22:09
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Nov 28, 2012
The future of fiber is copper
For at least a couple of decades now, fiber has always been envisioned as the ultimate broadband access technology. It's only become economically viable as a last-mile option in the last five years or so, but nowadays FTTx is the fastest growing fixed-broadband access technology, according to Point Topic, as well as the most talked about - especially now that the data exaflood is on the way, generated by high-def 3D video and other bandwidth-hungry data apps and services.
Meanwhile, just about every government-spawned national broadband plan either specifies FTTH as the preferred access technology, or is designed to encourage its deployment.
Little wonder the future is fiber. Unless it isn't.
And it might not be, according to a September Analysys Mason report that advises telcos to be cautious of fiber and focus on copper-based broadband.
"FTTH is often said to be 'future-proof', but the future appears to have veered off in a different direction," says report author and Analysys Mason principal analyst Rupert Wood.
Specifically, he says, while FTTH delivers super-fast data speeds, it lacks the kind of sexy service innovation seen in the wireless broadband space.
"The vague promise of future services may appeal to some early FTTH adopters, but will become increasingly ineffective as a selling point unless the rate of innovation in devices and services that are uniquely suitable for FTTH gets some new impetus from vendors and service providers," Wood insists. "The future cannot be simply plotted against increasing fixed-line bandwidth."
Meanwhile, government-funded broadband initiatives focused on fiber face budget issues in these economically uncertain times. Witness the debate in Australia where the NBN plan went from a wireless-based plan to a fiber-based plan as a result of the Labor Party winning the 2007 elections - and threatened to switch back this year if the Liberal/National Coalition won this year's elections due to concerns over the project's A$43 billion price tag.
The Analysys Mason report doesn't recommend that telcos abandon FTTH, but does advise them to focus more on copper-based broadband technologies like VDSL.
"Conditions vary between markets, but in general the business case [for FTTH] to move much beyond trials just isn't there and we are already beginning to see some scale-back," explains Wood.John C. Tanner | October 14, 2010
Specialize in xDSL filter/Splitter, Cables & IT relative accessories
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Sep 28, 2012
Vendor M&As: revenues seem healthy
Last week, Google announced it would buy Motorola Mobility. Will there be more big deals between troubled telecom vendors and deep-pocketed players in adjacent sectors? Probably. The ever-growing strength of Chinese vendors and weak macroeconomy have raised all sorts of M&A speculation.
Telecom vendors’ 2Q11 results, though, suggest that, at the very least, the sky is not falling. Mobile device revenue growth was very strong – up well over 40% from the year-ago quarter. Network infrastructure revenues also grew, up 7% for the quarter and up 10% for the first half. That’s consistent with Ovum’s projection for 2011 capex. But M&A is in the tech sector’s DNA and will continue to change the industry. Like evolution, it is unpredictable, messy, and lumpy, but it often produces sensible results in the long term.
The road to 2020 will be a hard one for many telecom vendors. In late 2009, Ovum published a series of reports mapping out a vision of telecom’s likely evolution through 2020. One of those reports focused on the supply side: “Telecoms in 2020: Network Infrastructure”.
Currently, for non-Chinese vendors, we are in the first stage on the road to 2020: full-service vendors are focused on cost efficiency and continue to downsize, outsource, and integrate operations. The pressure is high on middle-tier vendors such as Tellabs and Juniper, but there is plenty of room for specialized vendors (e.g. Tekelec, ADVA, Arris, Acme Packet), even if a weak venture capital market temporarily limits the flow of new players.
The competitive landscape faced by vendors is being shaped by many forces, including: the financial crisis and need for cutbacks; the further rise of the Chinese vendors; the increased reliance on chips and components for competitive, timely offerings; the urge to enter new markets and acquire intellectual property through M&A and VC investments; and the introduction of new technology and standards simultaneous with improvements in the last generation (e.g. LTE vs. HSPA+, FTTH PON vs. VDSL).
In short, it’s not an easy time to be a vendor. Growth and profits are difficult to achieve.Matt Walker/Ovum | August 23, 2011
Specialize in xDSL filter/Splitter, Cables & IT relative accessories
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Aug 13, 2012
New VDSL Subscribers to Quadruple by 2014
New subscribers to very-high-bitrate digital subscriber line (VDSL) service are set to nearly quadruple by 2014 as more competitors begin to ramp up their support for the technology, according to new IHS iSuppli research.
The number of new annual VDSL subscriber additions will grow to 60.1 million in 2014, up from just 15.6 million in 2009. A total of 23.3 million new VDSL subscribers were added in 2010.
“The telco broadband market is undergoing a seismic shift,” said Lee Ratliff, senior analyst for broadband and digital home at IHS. “Newer technologies such as VDSL and fiber-to-the-home (FTTH) have begun to emerge, while interest is waning within the industry for traditional broadband technologies like cable and asymmetric digital subscriber line (ADSL).”
Meanwhile, consumers also are willing to adopt the latest technology in order to get faster access to content.
“As the broadband market switches from a focus on data to stressing wideband multi-service and multimedia, fatter pipes to receive content are becoming more desired,” Ratliff said. “Broadband rates of 1 to 5 megabits per second (Mbps) were adequate when people were only surfing the Internet, but peer-to-peer file sharing, online gaming, streaming audio, voice over Internet protocol (VoIP) and Internet protocol television (IPTV) now all could be operating within one home. Such heavy activity points likely to a future in which 50 to 100Mbps will be standard—which fits exactly with VDSL’s capabilities.”
Ikanos Faces Increased Competition
Long dominated by Ikanos Communications Inc., the VDSL semiconductor market recently has become much more competitive. While Ikanos still leads with 55 percent market share, that figure is down from 75 percent only a year ago with the trend unlikely to stop anytime soon. Lacking in intellectual property (IP) to create a single-chip gateway solution, Ikanos instead has centered its focus on advanced VDSL technology such as vectoring and bonding. Such a strategy will continue to supply the company with the most advanced technology, but without having an integration roadmap, the door also has opened for competitors Broadcom Corp. and Lantiq to grab their fair market share.
Moreover, a new competitor with a history in the ADSL market, Ralink Technology Corp.—which recently acquired ADSL maker TrendChip Technologies Corp.—will soon bring a VDSL chip to the market in the first quarter of 2011. Ralink promises to bring a new level of cost competitiveness to the VDSL market, further squeezing Ikanos.Wednesday, February 23rd, 2011
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Feb 14, 2012
FTTH/B subscribership rose to 54 million by the middle of 2011
Fiber to the Home (FTTH) may not be the universal last mile access service yet, but according to Idate, fiber-based broadband subscribers increased 54 percent to nearly 67 million worldwide by the middle of 2011.
During the six month period, the amount of buildings and homes that service providers passed with fiber networks increased over 47 percent to almost 179 million.
By taking into consideration other fiber-based technologies, including the telco's hybrid copper/fiber-based VDSL2 and the cable industry's coax/fiber-based fiber to the last amplifier (FTTLA) architectures, and FTTX+LAN, service provider's last mile fiber deployments passed 112.7 million subscribers and 361.7 million homes/businesses at the end of June 2011.
From a country perspective, Japan leads the FTTH/B market, but Idate forecasts China, whose three main service providers--China Telecom, China Mobile and China Unicom--are aggressively rolling out FTTH/B, will soon surpass it. China Telecom, for one, is moving ahead with building out a FTTH network that can handle 18 million lines with 100 Mbps capabilities in major cities.
Holding onto the number three spot was South Korea, followed by the United States, Russia, Taiwan, Hong Kong, India, Sweden and France.
Overall, Asia-Pacific made up 68.6 percent of all FTTH/B subscribers as of the end of 2011, a figure that will grow to 72.8 percent by 2015.February 14, 2012 — 11:37pm ET | By Sean Buckley
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During the six month period, the amount of buildings and homes that service providers passed with fiber networks increased over 47 percent to almost 179 million.
By taking into consideration other fiber-based technologies, including the telco's hybrid copper/fiber-based VDSL2 and the cable industry's coax/fiber-based fiber to the last amplifier (FTTLA) architectures, and FTTX+LAN, service provider's last mile fiber deployments passed 112.7 million subscribers and 361.7 million homes/businesses at the end of June 2011.
From a country perspective, Japan leads the FTTH/B market, but Idate forecasts China, whose three main service providers--China Telecom, China Mobile and China Unicom--are aggressively rolling out FTTH/B, will soon surpass it. China Telecom, for one, is moving ahead with building out a FTTH network that can handle 18 million lines with 100 Mbps capabilities in major cities.
Holding onto the number three spot was South Korea, followed by the United States, Russia, Taiwan, Hong Kong, India, Sweden and France.
Overall, Asia-Pacific made up 68.6 percent of all FTTH/B subscribers as of the end of 2011, a figure that will grow to 72.8 percent by 2015.February 14, 2012 — 11:37pm ET | By Sean Buckley
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Feb 10, 2012
Cincinnati Bell's Q4 wireline revenue gets boost from data center, fiber-based broadband
Cincinnati Bell's (NYSE: CBB) wireline story in the fourth quarter was once again buoyed by growth in its data center business and fiber-based Fioptics service.
The ILEC reported overall revenue of $365 million, versus $363 million in the fourth quarter of 2010, while operating income declined to $9 million from $65 million in the fourth quarter of 2010, due primarily to a $50 million goodwill impairment loss in the fourth quarter.
For the year, company revenue was $1.5 billion, exceeding guidance of $1.4 billion.
"In terms of both revenue and adjusted EBITDA, this has been the company's best year since 2003, and we are particularly pleased with the growth momentum of our data center business and the strong and stable performance of our legacy communications business," said Jack Cassidy, president and chief executive officer of Cincinnati Bell, in the company's earnings release.
Data Center Colocation continued to be the shining star in Cincinnati Bell's service portfolio, generating revenue of $49 million, a 21 percent increase over the last quarter of 2010. To keep up with demand, the service provider's data center unit CyrusOne added 27,000 square feet of data center space and sold 43,000 square feet, increasing the segment's utilization to 88 percent.
In 2011, Cincinnati Bell built out 124,000 square feet of additional data center space, increasing total capacity to 763,000 square feet, and sold 110,000 square feet. The service provider announced this week that it's now considering structural, capital and financial alternatives for the data center business.
Although Cincinnati Bell continues to see traditional voice revenue losses, the increasing demand for its Fioptics product suite helped drive up wireline revenues to $180 million, narrowing losses to one percent year over year. These results enabled the wireline division to achieve adjusted EBITDA margins of 49 percent in both the full year and the fourth quarter of 2011, comparable to the full year in 2010.
During the quarter, the wireline segment passed 19,000 additional homes and businesses with its Fioptics product suite, bringing the total number of premises passed with the service to 134,000. This year the service provider has set a goal of passing another 40,000 new units.
As expected, the growth of Fioptics helped offset its loss of 11,000 traditional DSL subscribers in the quarter. It added 2,000 new Fioptics entertainment subscribers in the quarter, or 12,000 during the year, driving the total base to 40,000 customers. At the end of 2011, Cincinnati Bell had 257,000 high-speed Internet subscribers.
On a yearly basis, wireline revenue declined only one percent to $732 million, while operating income and adjusted EBITDA both decreased by 2 percent to $229 million and $355 million, respectively.
Looking towards the rest of 2012, the telco has forecast $1.5 billion in overall revenue and about $530 million in adjusted EBITDA.February 10, 2012 — 10:57am ET | By Sean Buckley
We are specializing in telecommunication accessories
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The ILEC reported overall revenue of $365 million, versus $363 million in the fourth quarter of 2010, while operating income declined to $9 million from $65 million in the fourth quarter of 2010, due primarily to a $50 million goodwill impairment loss in the fourth quarter.
For the year, company revenue was $1.5 billion, exceeding guidance of $1.4 billion.
"In terms of both revenue and adjusted EBITDA, this has been the company's best year since 2003, and we are particularly pleased with the growth momentum of our data center business and the strong and stable performance of our legacy communications business," said Jack Cassidy, president and chief executive officer of Cincinnati Bell, in the company's earnings release.
Data Center Colocation continued to be the shining star in Cincinnati Bell's service portfolio, generating revenue of $49 million, a 21 percent increase over the last quarter of 2010. To keep up with demand, the service provider's data center unit CyrusOne added 27,000 square feet of data center space and sold 43,000 square feet, increasing the segment's utilization to 88 percent.
In 2011, Cincinnati Bell built out 124,000 square feet of additional data center space, increasing total capacity to 763,000 square feet, and sold 110,000 square feet. The service provider announced this week that it's now considering structural, capital and financial alternatives for the data center business.
Although Cincinnati Bell continues to see traditional voice revenue losses, the increasing demand for its Fioptics product suite helped drive up wireline revenues to $180 million, narrowing losses to one percent year over year. These results enabled the wireline division to achieve adjusted EBITDA margins of 49 percent in both the full year and the fourth quarter of 2011, comparable to the full year in 2010.
During the quarter, the wireline segment passed 19,000 additional homes and businesses with its Fioptics product suite, bringing the total number of premises passed with the service to 134,000. This year the service provider has set a goal of passing another 40,000 new units.
As expected, the growth of Fioptics helped offset its loss of 11,000 traditional DSL subscribers in the quarter. It added 2,000 new Fioptics entertainment subscribers in the quarter, or 12,000 during the year, driving the total base to 40,000 customers. At the end of 2011, Cincinnati Bell had 257,000 high-speed Internet subscribers.
On a yearly basis, wireline revenue declined only one percent to $732 million, while operating income and adjusted EBITDA both decreased by 2 percent to $229 million and $355 million, respectively.
Looking towards the rest of 2012, the telco has forecast $1.5 billion in overall revenue and about $530 million in adjusted EBITDA.February 10, 2012 — 10:57am ET | By Sean Buckley
We are specializing in telecommunication accessories
Original Article Here
Oct 23, 2011
Ikanos chips presage IPTV-optimized VDSL2
Ikanos Communications has introduced a family of multimode VDSL2 chipsets with integrated packet classification and noise protection circuitry, critical capabilities for IPTV. The chipsets are designed to provide the highest throughput and density, with the lowest power consumption per port.
VDSL2 provides the bandwidth DSL service providers need to offer the triple play, but only on subscriber loops much shorter than most U.S. telcos have installed. VDSL2 has been deployed more extensively in Europe and elsewhere.
Ikanos introduced two chipsets that support all VDSL2 profiles - 8a, 8b, 8c, 8d, 12a, 12b, 17a and 30a - and are optimized for 30 MHz spectrum operation to offer 100/100 Mbps performance. Two other chipsets support all VDSL2 profiles except 30a, and are optimized for 17.6 MHz spectrum utilization and 100/50 Mbps performance.
All chipsets are available in sample quantities now. Production quantities will be available late in the third quarter.
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VDSL2 provides the bandwidth DSL service providers need to offer the triple play, but only on subscriber loops much shorter than most U.S. telcos have installed. VDSL2 has been deployed more extensively in Europe and elsewhere.
Ikanos introduced two chipsets that support all VDSL2 profiles - 8a, 8b, 8c, 8d, 12a, 12b, 17a and 30a - and are optimized for 30 MHz spectrum operation to offer 100/100 Mbps performance. Two other chipsets support all VDSL2 profiles except 30a, and are optimized for 17.6 MHz spectrum utilization and 100/50 Mbps performance.
All chipsets are available in sample quantities now. Production quantities will be available late in the third quarter.
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Jul 28, 2011
VDSL Port Shipments Grow to Record Level in the First Quarter
EMEA and North America Account for Most Shipments
REDWOOD CITY, Calif. — According to a newly published report by Dell’Oro Group, the trusted source for market information about the networking and telecommunications industries, VDSL port shipments reached a record level in the first quarter of 2011, surging almost 50% over the year-ago period.
“With ADSL being a mature technology with limited bandwidth capabilities, many service providers are upgrading their networks with high-speed VDSL or PON equipment to enable new, high-bandwidth intensive services such as IPTV,” said Tam Dell’Oro, President of Dell’Oro Group. “In many situations, VDSL is also being used as part of all-IP network transformations that utilize multiservice access nodes and soft switches with the goal of decommissioning older TDM infrastructure,” Dell’Oro added.
The report also indicates that VDSL growth was led by shipments to EMEA, which almost doubled over the year-ago period and accounted for more than 60% of worldwide VDSL shipments. North America was the second largest region for VDSL, accounting for a quarter of total VDSL. The majority of these were purchased by AT&T to support its U-verse IPTV service, the largest fiber-to-the-node/VDSL upgrade project currently being deployed. Tuesday, June 7th, 2011
Minority-Owned Business by Supplier Diversity, Public Utilities Commission-State of California
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REDWOOD CITY, Calif. — According to a newly published report by Dell’Oro Group, the trusted source for market information about the networking and telecommunications industries, VDSL port shipments reached a record level in the first quarter of 2011, surging almost 50% over the year-ago period.
“With ADSL being a mature technology with limited bandwidth capabilities, many service providers are upgrading their networks with high-speed VDSL or PON equipment to enable new, high-bandwidth intensive services such as IPTV,” said Tam Dell’Oro, President of Dell’Oro Group. “In many situations, VDSL is also being used as part of all-IP network transformations that utilize multiservice access nodes and soft switches with the goal of decommissioning older TDM infrastructure,” Dell’Oro added.
The report also indicates that VDSL growth was led by shipments to EMEA, which almost doubled over the year-ago period and accounted for more than 60% of worldwide VDSL shipments. North America was the second largest region for VDSL, accounting for a quarter of total VDSL. The majority of these were purchased by AT&T to support its U-verse IPTV service, the largest fiber-to-the-node/VDSL upgrade project currently being deployed. Tuesday, June 7th, 2011
Minority-Owned Business by Supplier Diversity, Public Utilities Commission-State of California
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Jul 20, 2011
AT&T's Stephenson says its legacy DSL is 'obsolete'
Randall Stephenson, CEO of AT&T (NYSE: T), during this week's National Association of Regulatory Utility Commissioners (NARUC) summer meeting in Los Angeles, admitted that the copper-based DSL network that delivers its broadband data services is "obsolete."
Of course, AT&T's chief competitor Comcast (Nasdaq: CMCSA), which had its own EVP David Cohen speaking at the event right after Stephenson, wasted no time reporting on Stephenson's comments.
Sena Fitzmaurice, Vice President, Government Communications tweeted: "AT&T CEO: to chase comcast we built dsl, it is obsolete now."
Obviously, this statement is a shot in AT&T's foot in that DSL (VDSL2 for a growing amount of its U-verse customers) continues to be the dominant broadband vehicle for its customer base. Compounding the issue is that AT&T said earlier this year that it would start winding down its U-verse rollout, meaning that those customers that have not been upgraded yet probably won't be for a long time.
When AT&T was asked later by GigaOm to clarify Stephenson's comments, AT&T spokeswomaqn Mari Melguizo said he was answering a question from an audience member about how state regulators should think about new technology cycles when they are considering things like USF.
She added that Stephenson believes that new technology like DSL used to be amortized over a 10-15 year period, but that has shrunk to about 5 years now. Since DSL was introduced in the 1990s, it has been surpassed in speed by its U-verse product and Comcast's DOCSIS 3.0.
And much like how 4G wireless has surpassed the speeds and available applications on 3G wireless, Stephenson's main point was that new technology is being surpassed by the next generation much quicker than ever before. "We have millions of customers using DSL and remain fully committed to the technology -- even as we constantly look to bring innovation to the marketplace," Melguizo said. July 20, 2011 — 11:46am ET | By Sean Buckley
telCade.com Minority-Owned Business by Supplier Diversity, Public Utilities Commission-State of California
Original Article Here
Of course, AT&T's chief competitor Comcast (Nasdaq: CMCSA), which had its own EVP David Cohen speaking at the event right after Stephenson, wasted no time reporting on Stephenson's comments.
Sena Fitzmaurice, Vice President, Government Communications tweeted: "AT&T CEO: to chase comcast we built dsl, it is obsolete now."
Obviously, this statement is a shot in AT&T's foot in that DSL (VDSL2 for a growing amount of its U-verse customers) continues to be the dominant broadband vehicle for its customer base. Compounding the issue is that AT&T said earlier this year that it would start winding down its U-verse rollout, meaning that those customers that have not been upgraded yet probably won't be for a long time.
When AT&T was asked later by GigaOm to clarify Stephenson's comments, AT&T spokeswomaqn Mari Melguizo said he was answering a question from an audience member about how state regulators should think about new technology cycles when they are considering things like USF.
She added that Stephenson believes that new technology like DSL used to be amortized over a 10-15 year period, but that has shrunk to about 5 years now. Since DSL was introduced in the 1990s, it has been surpassed in speed by its U-verse product and Comcast's DOCSIS 3.0.
And much like how 4G wireless has surpassed the speeds and available applications on 3G wireless, Stephenson's main point was that new technology is being surpassed by the next generation much quicker than ever before. "We have millions of customers using DSL and remain fully committed to the technology -- even as we constantly look to bring innovation to the marketplace," Melguizo said. July 20, 2011 — 11:46am ET | By Sean Buckley
telCade.com Minority-Owned Business by Supplier Diversity, Public Utilities Commission-State of California
Original Article Here
Jul 16, 2011
AT&T: Bonded VDSL is here for real
AT&T's (NYSE: T) deployment of bonded VDSL--one that's seen various delays dating back to 2007--now appears to be on track.
Designed to be a response to cable's DOCSIS 3.0 drive, a Broadband DSL Reports post reports that AT&T will start rolling out pair bonded VDSL this week in certain markets and eventually throughout its entire 22 state territory. With bonded VDSL, AT&T will be able to reach more customers because they will be able to extend its U-Verse service an additional 1-2,000 feet from the Video Ready Access Device (VRAD).
This extended reach will enable AT&T to pass 30 million homes-a goal it previously missed because of modem chipset issues--by the end of next year. Even though AT&T made a recent claim that it could deliver 80 Mbps service, it looks like its bonded VDSL deployment is focused on expanding the reach of U-Verse not bandwidth speeds. VDSL with bonding can theoretically expand broadband data speeds, but chances are the enhanced bandwidth will be used for video with broadband speeds holding 24/3 Mbps for customers that are eligible for the service.
But even if AT&T is moving forward with its bonded VDSL plans, cable will still have the advantage over AT&T in terms of broadband speed. By comparison, Comcast's 50 Mbps DOCSIS 3.0 service is already available in 80 percent of its markets and it has been rolling out a 100 Mbps DOCSIS 3.0 service in select markets. To compete with cable's speeds, AT&T will likely have to consider leveraging new DSL innovations such as Dynamic Spectrum Management (DSM) and vectoring. July 16, 2010 — 10:10am ET | By Sean Buckley
telCade.com Minority-Owned Business by Supplier Diversity, Public Utilities Commission-State of California
Original Article Here
Designed to be a response to cable's DOCSIS 3.0 drive, a Broadband DSL Reports post reports that AT&T will start rolling out pair bonded VDSL this week in certain markets and eventually throughout its entire 22 state territory. With bonded VDSL, AT&T will be able to reach more customers because they will be able to extend its U-Verse service an additional 1-2,000 feet from the Video Ready Access Device (VRAD).
This extended reach will enable AT&T to pass 30 million homes-a goal it previously missed because of modem chipset issues--by the end of next year. Even though AT&T made a recent claim that it could deliver 80 Mbps service, it looks like its bonded VDSL deployment is focused on expanding the reach of U-Verse not bandwidth speeds. VDSL with bonding can theoretically expand broadband data speeds, but chances are the enhanced bandwidth will be used for video with broadband speeds holding 24/3 Mbps for customers that are eligible for the service.
But even if AT&T is moving forward with its bonded VDSL plans, cable will still have the advantage over AT&T in terms of broadband speed. By comparison, Comcast's 50 Mbps DOCSIS 3.0 service is already available in 80 percent of its markets and it has been rolling out a 100 Mbps DOCSIS 3.0 service in select markets. To compete with cable's speeds, AT&T will likely have to consider leveraging new DSL innovations such as Dynamic Spectrum Management (DSM) and vectoring. July 16, 2010 — 10:10am ET | By Sean Buckley
telCade.com Minority-Owned Business by Supplier Diversity, Public Utilities Commission-State of California
Original Article Here
Jul 15, 2011
Ikanos chips support 100 Mbps DSL
Ikanos has developed a new set of chips that support 100 Mbps DSL, based on a new standard that supports both channel bonding and vectoring.
Ikanos' new Fusiv Vx185 and Vx183 chips conform to the new G.vector ITU standard, which defines how to achieve 100 Mbps service over traditional copper lines, which by some calculations would be a tenth the cost of achieving the same transmission rates with fiber.
The standard covers bonding for increased rate and reach, ultra-low power and, ultimately, gigabit line rate performance.
These new devices add to Ikanos' NodeScale Vectoring architecture, which spans the central office, remote cabinets in fiber to the node (FTTN) networks, and now the customer premises.
The Fusiv Vx185 integrates support for bonding by natively interfacing directly to two integrated analog front-end devices, Ikanos said. This is designed to allow the coupling of two TCP (twisted copper pair) wires. Together, bonding and vectoring can be combined to push aggregate data rates up to 300Mbps, the company said.
The new Fusiv family of devices also includes the following features:
Full ADSL and VDSL2 support with a single hardware design
Support for all VDSL2 profiles and band plans for Asia, Europe, and North America – 8a, 8b, 8c, 8d, 12a, 17a and 30a
Support for ADSL2+, ADSL2, and ADSL standards
Support for all mandatory and optional features of VDSL2
Exceeds Broadband Forum performance requirements (TR-67, TR-100, and WT- 114)
Support for all wired or wireless networking technologies including Wi-Fi (single or dual-band concurrent modes), HomePNA, HomePlug, Multi-media Over Coax, and ITU G.hn
Integrated SATA interface for the easy addition of network attached storage devices
System level support for high performance IPv6
IPSec and Secure Sockets Layer (SSL) VPN implementation using on-chip cryptographic engines
John Quigley, president and CEO, of Ikanos, said G.Vector support "pushes VDSL performance to the 100 Mbps threshold and beyond at a time when service providers are looking for a cost-effective way to upgrade their existing copper networks in order to compete with DOCSIS 3.0 and FTTH technologies." By Brian Santo
CedMagazine.com - March 15, 2011
Let’s us provide you (VDSL/ xDSL filters/ Splitters, Cable & Wire harness, power Cord)
Original Article Here
Ikanos' new Fusiv Vx185 and Vx183 chips conform to the new G.vector ITU standard, which defines how to achieve 100 Mbps service over traditional copper lines, which by some calculations would be a tenth the cost of achieving the same transmission rates with fiber.
The standard covers bonding for increased rate and reach, ultra-low power and, ultimately, gigabit line rate performance.
These new devices add to Ikanos' NodeScale Vectoring architecture, which spans the central office, remote cabinets in fiber to the node (FTTN) networks, and now the customer premises.
The Fusiv Vx185 integrates support for bonding by natively interfacing directly to two integrated analog front-end devices, Ikanos said. This is designed to allow the coupling of two TCP (twisted copper pair) wires. Together, bonding and vectoring can be combined to push aggregate data rates up to 300Mbps, the company said.
The new Fusiv family of devices also includes the following features:
Full ADSL and VDSL2 support with a single hardware design
Support for all VDSL2 profiles and band plans for Asia, Europe, and North America – 8a, 8b, 8c, 8d, 12a, 17a and 30a
Support for ADSL2+, ADSL2, and ADSL standards
Support for all mandatory and optional features of VDSL2
Exceeds Broadband Forum performance requirements (TR-67, TR-100, and WT- 114)
Support for all wired or wireless networking technologies including Wi-Fi (single or dual-band concurrent modes), HomePNA, HomePlug, Multi-media Over Coax, and ITU G.hn
Integrated SATA interface for the easy addition of network attached storage devices
System level support for high performance IPv6
IPSec and Secure Sockets Layer (SSL) VPN implementation using on-chip cryptographic engines
John Quigley, president and CEO, of Ikanos, said G.Vector support "pushes VDSL performance to the 100 Mbps threshold and beyond at a time when service providers are looking for a cost-effective way to upgrade their existing copper networks in order to compete with DOCSIS 3.0 and FTTH technologies." By Brian Santo
CedMagazine.com - March 15, 2011
Let’s us provide you (VDSL/ xDSL filters/ Splitters, Cable & Wire harness, power Cord)
Original Article Here
Jun 30, 2011
56% of France’s DSL subscribers had TV-over-DSL at end-Q1 2011
ARCEP (L’Autorité de régulation des communications électroniques et des postes), France’s telecommunications and postal services regulator, has published its latest market survey covering the period up to the end of the first quarter 2011.
According to the survey, at the end of the period there were 20.25 million DSL subscribers in France, with 56% of those (11.4 million) also subscribing to TV-over-DSL.
ADSL subscribers (thousands):
1Q2010 2Q2010 3Q2010 4Q2010 1Q2011
------ ------ ------ ------ ------
Total 18,909 19,147 19,476 19,858 20,254
Number with TV-over-ADSL 9,306 9,705 10,122 10,684 11,369
%age with TV-over-ADSL 49.2% 50.7% 52.0% 53.8% 56.1%
Thursday, June 30th, 2011
Let’s us know if we could able to supports you and your team
Original Article Here
According to the survey, at the end of the period there were 20.25 million DSL subscribers in France, with 56% of those (11.4 million) also subscribing to TV-over-DSL.
ADSL subscribers (thousands):
1Q2010 2Q2010 3Q2010 4Q2010 1Q2011
------ ------ ------ ------ ------
Total 18,909 19,147 19,476 19,858 20,254
Number with TV-over-ADSL 9,306 9,705 10,122 10,684 11,369
%age with TV-over-ADSL 49.2% 50.7% 52.0% 53.8% 56.1%
Thursday, June 30th, 2011
Let’s us know if we could able to supports you and your team
Original Article Here
Jun 7, 2011
VDSL Port Shipments Grow to Record Level in the First Quarter
EMEA and North America Account for Most Shipments
REDWOOD CITY, Calif. — According to a newly published report by Dell’Oro Group, the trusted source for market information about the networking and telecommunications industries, VDSL port shipments reached a record level in the first quarter of 2011, surging almost 50% over the year-ago period.
“With ADSL being a mature technology with limited bandwidth capabilities, many service providers are upgrading their networks with high-speed VDSL or PON equipment to enable new, high-bandwidth intensive services such as IPTV,” said Tam Dell’Oro, President of Dell’Oro Group. “In many situations, VDSL is also being used as part of all-IP network transformations that utilize multiservice access nodes and soft switches with the goal of decommissioning older TDM infrastructure,” Dell’Oro added.
The report also indicates that VDSL growth was led by shipments to EMEA, which almost doubled over the year-ago period and accounted for more than 60% of worldwide VDSL shipments. North America was the second largest region for VDSL, accounting for a quarter of total VDSL. The majority of these were purchased by AT&T to support its U-verse IPTV service, the largest fiber-to-the-node/VDSL upgrade project currently being deployed. Tuesday, June 7th, 2011
Let’s us know if we could able to supports you and your team
Original Article Here
REDWOOD CITY, Calif. — According to a newly published report by Dell’Oro Group, the trusted source for market information about the networking and telecommunications industries, VDSL port shipments reached a record level in the first quarter of 2011, surging almost 50% over the year-ago period.
“With ADSL being a mature technology with limited bandwidth capabilities, many service providers are upgrading their networks with high-speed VDSL or PON equipment to enable new, high-bandwidth intensive services such as IPTV,” said Tam Dell’Oro, President of Dell’Oro Group. “In many situations, VDSL is also being used as part of all-IP network transformations that utilize multiservice access nodes and soft switches with the goal of decommissioning older TDM infrastructure,” Dell’Oro added.
The report also indicates that VDSL growth was led by shipments to EMEA, which almost doubled over the year-ago period and accounted for more than 60% of worldwide VDSL shipments. North America was the second largest region for VDSL, accounting for a quarter of total VDSL. The majority of these were purchased by AT&T to support its U-verse IPTV service, the largest fiber-to-the-node/VDSL upgrade project currently being deployed. Tuesday, June 7th, 2011
Let’s us know if we could able to supports you and your team
Original Article Here
May 26, 2011
ASSIA boosts its U.S. DSL market share
ASSIA, a provider of software tools that provide Dynamic Spectrum Management (DSM) of DSL networks, has found a sizeable niche serving the U.S. DSL service provider market that wants to make more out of their existing copper networks.
Although it has not revealed a breakdown of its customer base, the vendor claims that recent sales of its DSM product have advanced its DSL market share to over 80 percent, a figure based on Point Topic's Q4 2009 Global Broadband Statistics Report.
Dr. John Cioffi, Chairman and CEO of ASSIA, said the he "expects to further increase its penetration of the North American market in the next year."
Finding ways to squeeze more life out of existing copper will resonate with large telcos such as AT&T and Qwest, which unlike Verizon that's going for an all Fiber to the Home approach, are leveraging their existing copper plant to deliver high speed data and video services in a Fiber to the Node (FTTN) configuration with VDSL2. Dynamic Spectrum Management, along with other emerging tools such as vectoring and bonding, have been heralded as the latest and greatest techniques to expand the rate and reach of DSL networks. According to ASSIA, it can help service providers deliver 100 Mbps data speeds and above over their existing copper lines.
ASSIA is not alone in expanding the boundaries of copper, however. Alcatel-Lucent and Ericsson have also been conducting experiments with vectoring technology that can deliver even higher speeds over copper. A recent experiment conducted by Alcatel-Lucent leveraging a mixture of VDSL2, VDSL2 bonding, and VDSL2 vectoring illustrated that they could deliver 300 Mbps on two copper pairs, while Ericsson demonstrated 500 Mbps data delivery with vectorized VDSL2.May 26, 2010 — 7:06am ET | By Sean Buckley
telCade.com Minority-Owned Business by Supplier Diversity, Public Utilities Commission-State of California
Original Article Here
Although it has not revealed a breakdown of its customer base, the vendor claims that recent sales of its DSM product have advanced its DSL market share to over 80 percent, a figure based on Point Topic's Q4 2009 Global Broadband Statistics Report.
Dr. John Cioffi, Chairman and CEO of ASSIA, said the he "expects to further increase its penetration of the North American market in the next year."
Finding ways to squeeze more life out of existing copper will resonate with large telcos such as AT&T and Qwest, which unlike Verizon that's going for an all Fiber to the Home approach, are leveraging their existing copper plant to deliver high speed data and video services in a Fiber to the Node (FTTN) configuration with VDSL2. Dynamic Spectrum Management, along with other emerging tools such as vectoring and bonding, have been heralded as the latest and greatest techniques to expand the rate and reach of DSL networks. According to ASSIA, it can help service providers deliver 100 Mbps data speeds and above over their existing copper lines.
ASSIA is not alone in expanding the boundaries of copper, however. Alcatel-Lucent and Ericsson have also been conducting experiments with vectoring technology that can deliver even higher speeds over copper. A recent experiment conducted by Alcatel-Lucent leveraging a mixture of VDSL2, VDSL2 bonding, and VDSL2 vectoring illustrated that they could deliver 300 Mbps on two copper pairs, while Ericsson demonstrated 500 Mbps data delivery with vectorized VDSL2.May 26, 2010 — 7:06am ET | By Sean Buckley
telCade.com Minority-Owned Business by Supplier Diversity, Public Utilities Commission-State of California
Original Article Here
May 8, 2011
Win the OTT challenge, say goodbye to the pinwheel
And do it with content-aware networking.
The world is watching, and it has a voracious appetite. Media consumption has shifted violently from broadcast to unicast as consumers embrace a la carte consumption. Media is now consumed on PCs, smartphones and other devices, as well as the traditional TV.
This isn’t a George Orwell novel, it’s the straight truth that demand for a la carte video content has increased exponentially. This increase in interest for video content and the subsequent rise in diverse media available are exciting for many consumers, but it’s a difficult pill to swallow for many service providers. Addressing the demand raises questions about how to keep operational costs at a reasonable level, increase profits, and still offer customers the fast and affordable service they have come to expect. Service providers are challenged to find new ways to adjust to the demand while keeping their networks from buckling under the pressure of increasing broadband traffic.
The shift in media consumption is being delivered in two models: Service providers are extending their existing video delivery networks with video-ondemand and “TV Everywhere,” but more importantly, an entirely new commercial model is emerging called over the top. OTT is a term for a service used by a consumer that is delivered over a network where the service is not offered by the network operator. The service rides on top of the network the consumer already gets and doesn’t require any business or technology affiliations with the network operator. OTT growth is being fueled by social networking, size of content, ease of accessing content (e.g., Netflix) and the currency of content. By Gary Southwell, CTO of BTI Systems
CedMagazine.com - May 01, 2011
Let’s us provide you ( xDSL, VDSL filters/ Splitters, Cable & Wire Harness)
Original Article contiue
The world is watching, and it has a voracious appetite. Media consumption has shifted violently from broadcast to unicast as consumers embrace a la carte consumption. Media is now consumed on PCs, smartphones and other devices, as well as the traditional TV.
This isn’t a George Orwell novel, it’s the straight truth that demand for a la carte video content has increased exponentially. This increase in interest for video content and the subsequent rise in diverse media available are exciting for many consumers, but it’s a difficult pill to swallow for many service providers. Addressing the demand raises questions about how to keep operational costs at a reasonable level, increase profits, and still offer customers the fast and affordable service they have come to expect. Service providers are challenged to find new ways to adjust to the demand while keeping their networks from buckling under the pressure of increasing broadband traffic.
The shift in media consumption is being delivered in two models: Service providers are extending their existing video delivery networks with video-ondemand and “TV Everywhere,” but more importantly, an entirely new commercial model is emerging called over the top. OTT is a term for a service used by a consumer that is delivered over a network where the service is not offered by the network operator. The service rides on top of the network the consumer already gets and doesn’t require any business or technology affiliations with the network operator. OTT growth is being fueled by social networking, size of content, ease of accessing content (e.g., Netflix) and the currency of content. By Gary Southwell, CTO of BTI Systems
CedMagazine.com - May 01, 2011
Let’s us provide you ( xDSL, VDSL filters/ Splitters, Cable & Wire Harness)
Original Article contiue
Apr 18, 2011
What are the various types of xDSL?
There are several forms of xDSL, each designed around specific goals
and needs of the marketplace. Some forms of xDSL are proprietary,
some are simply theoretical models and some are widely used
standards. They may best be categorized within the modulation
methods used to encode data. Below is a brief summary of some of the
known types of xDSL technologies.
ADSL
Asymmetric Digital Subscriber Line (ADSL) is the most popular form
of xDSL technology. The key to ADSL is that the upstream and
downstream bandwidth is asymmetric, or uneven. In practice, the
bandwidth from the provider to the user (downstream) will be the
higher speed path. This is in part due to the limitation of the
telephone cabling system and the desire to accommodate the typical
Internet usage pattern where the majority of data is being sent to
the user (programs, graphics, sounds and video) with minimal upload
capacity required (keystrokes and mouse clicks). Downstream speeds
typically range from 768 Kb/s to 9 Mb/s Upstream speeds typically
range from 64Kb/s to 1.5Mb/s.
ADSL Lite (see G.lite)
CDSL
Consumer Digital Subscriber Line (CDSL) is a proprietary technology
trademarked by Rockwell International.
CiDSL
Globespan's proprietary, splitterless Consumer-installable Digital
Subscriber Line (CiDSL).
EtherLoop
EtherLoop is currently a proprietary technology from Nortel, short
for Ethernet Local Loop. EtherLoop uses the advanced signal
modulation techniques of DSL and combines them with the half-duplex
"burst" packet nature of Ethernet. EtherLoop modems will only
generate hi-frequency signals when there is something to send. The
rest of the time, they will use only a low-frequency (ISDN-speed)
management signal. EtherLoop can measure the ambient noise between
packets. This will allow the ability to avoid interference on a
packet-by-packet basis by shifting frequencies as necessary. Since
EtherLoop will be half-duplex; it is capable of generating the same
bandwidth rate in either the upstream or downstream direction, but
not simultaneously. Nortel is initially planning for speeds
ranging between 1.5Mb/s and 10Mb/s depending on line quality and
distance limitations.
G.lite
A lower data rate version of Asymmetric Digital Subscriber Line
(ADSL) was been proposed as an extension to ANSI standard T1.413 by
the UAWG (Universal ADSL Working Group) led by Microsoft, Intel,
and Compaq. This is known as G.992.2 in the ITU standards
committee. It uses the same modulation scheme as ADSL (DMT), but
eliminates the POTS splitter at the customer premises. As a
result, the ADSL signal is carried over all of the house wiring
which results in lower available bandwidth due to greater noise
impairments. Often a misnomer, this technology is not splitterless
per se. Instead of requiring a splitter at customer premises, the
splitting of the signal is done at the local CO.
G.shdsl
G.shdsl is an ITU standard which offers a rich set of features (e.g.
rate adaptive) and offers greater reach than many current
standards. G.shdsl also allows for the negotiation of a number of
framing protocols including ATM, T1, E1, ISDN and IP. G.shdsl is
touted as being able to replace T1, E1, HDSL, SDSL HDSL2, ISDN and
IDSL technologies.
HDSL
High Bit-rate Digital Subscriber Line (HDSL) is generally used as a
substitute for T1/E1. HDSL is becoming popular as a way to provide
full-duplex symmetric data communication at rates up to 1.544 Mb/s
(2.048 Mb/s in Europe) over moderate distances via conventional
telephone twisted-pair wires. Traditional T1 (E1 in Europe)
requires repeaters every 6000 ft. to boost the signal strength.
HDSL has a longer range than T1/E1 without the use of repeaters to
allow transmission over distances up to 12,000 feet. It uses pulse
amplitude modulation (PAM) on a 4-wire loop.
HDSL2
High Bit-rate Digital Subscriber Line 2 was designed to transport T1
signaling at 1.544 Mb/s over a single copper pair. HDSL2 uses
overlapped phase Trellis-code interlocked spectrum (OPTIS).
IDSL
ISDN based DSL developed originally by Ascend Communications. IDSL
uses 2B1Q line coding and typically supports data transfer rates of
128 Kb/s. Many end users have had to suffice with IDSL service
when full speed ADSL was not available in their area. This
technology is similar to ISDN, but uses the full bandwidth of two
64 Kb/s bearer channels plus one 16 Kb/s delta channel.
MDSL
Usually this stands for multi-rate Digital Subscriber Line (MDSL).
It depends on the context of the acronym as to its meaning. It is
either a proprietary scheme for SDSL or simply a generic
alternative to the more common ADSL name. In the former case, you
may see the acronym MSDSL. There is also another proprietary scheme
which stands for medium-bit-rate DSL. Confused yet?
RADSL
Rate Adaptive Digital Subscriber Line (RADSL) is any rate adaptive
xDSL modem, but may specifically refer to a proprietary modulation
standard designed by Globespan Semiconductor. It uses carrierless
amplitude and phase modulation (CAP). T1.413 standard DMT modems
are also technically RADSL, but generally not referred to as such.
The uplink rate depends on the downlink rate, which is a function
of line conditions and signal to noise ratio (SNR).
SDSL
Symmetric Digital Subscriber Line (SDSL) is a 2-wire implementation
of HDSL. Supports T1/E1 on a single pair to a distance of
11,000 ft. The name has become more generic over time to refer to
symmetric service at a variety of rates over a single loop.
UDSL
Universal DSL. See G.lite.
VDSL
Very High Bit-rate Digital Subscriber Line (VDSL) is proposed for
shorter local loops, perhaps up to 3000 ft. Data rates exceed 10
Mb/s.
Original Article here
and needs of the marketplace. Some forms of xDSL are proprietary,
some are simply theoretical models and some are widely used
standards. They may best be categorized within the modulation
methods used to encode data. Below is a brief summary of some of the
known types of xDSL technologies.
ADSL
Asymmetric Digital Subscriber Line (ADSL) is the most popular form
of xDSL technology. The key to ADSL is that the upstream and
downstream bandwidth is asymmetric, or uneven. In practice, the
bandwidth from the provider to the user (downstream) will be the
higher speed path. This is in part due to the limitation of the
telephone cabling system and the desire to accommodate the typical
Internet usage pattern where the majority of data is being sent to
the user (programs, graphics, sounds and video) with minimal upload
capacity required (keystrokes and mouse clicks). Downstream speeds
typically range from 768 Kb/s to 9 Mb/s Upstream speeds typically
range from 64Kb/s to 1.5Mb/s.
ADSL Lite (see G.lite)
CDSL
Consumer Digital Subscriber Line (CDSL) is a proprietary technology
trademarked by Rockwell International.
CiDSL
Globespan's proprietary, splitterless Consumer-installable Digital
Subscriber Line (CiDSL).
EtherLoop
EtherLoop is currently a proprietary technology from Nortel, short
for Ethernet Local Loop. EtherLoop uses the advanced signal
modulation techniques of DSL and combines them with the half-duplex
"burst" packet nature of Ethernet. EtherLoop modems will only
generate hi-frequency signals when there is something to send. The
rest of the time, they will use only a low-frequency (ISDN-speed)
management signal. EtherLoop can measure the ambient noise between
packets. This will allow the ability to avoid interference on a
packet-by-packet basis by shifting frequencies as necessary. Since
EtherLoop will be half-duplex; it is capable of generating the same
bandwidth rate in either the upstream or downstream direction, but
not simultaneously. Nortel is initially planning for speeds
ranging between 1.5Mb/s and 10Mb/s depending on line quality and
distance limitations.
G.lite
A lower data rate version of Asymmetric Digital Subscriber Line
(ADSL) was been proposed as an extension to ANSI standard T1.413 by
the UAWG (Universal ADSL Working Group) led by Microsoft, Intel,
and Compaq. This is known as G.992.2 in the ITU standards
committee. It uses the same modulation scheme as ADSL (DMT), but
eliminates the POTS splitter at the customer premises. As a
result, the ADSL signal is carried over all of the house wiring
which results in lower available bandwidth due to greater noise
impairments. Often a misnomer, this technology is not splitterless
per se. Instead of requiring a splitter at customer premises, the
splitting of the signal is done at the local CO.
G.shdsl
G.shdsl is an ITU standard which offers a rich set of features (e.g.
rate adaptive) and offers greater reach than many current
standards. G.shdsl also allows for the negotiation of a number of
framing protocols including ATM, T1, E1, ISDN and IP. G.shdsl is
touted as being able to replace T1, E1, HDSL, SDSL HDSL2, ISDN and
IDSL technologies.
HDSL
High Bit-rate Digital Subscriber Line (HDSL) is generally used as a
substitute for T1/E1. HDSL is becoming popular as a way to provide
full-duplex symmetric data communication at rates up to 1.544 Mb/s
(2.048 Mb/s in Europe) over moderate distances via conventional
telephone twisted-pair wires. Traditional T1 (E1 in Europe)
requires repeaters every 6000 ft. to boost the signal strength.
HDSL has a longer range than T1/E1 without the use of repeaters to
allow transmission over distances up to 12,000 feet. It uses pulse
amplitude modulation (PAM) on a 4-wire loop.
HDSL2
High Bit-rate Digital Subscriber Line 2 was designed to transport T1
signaling at 1.544 Mb/s over a single copper pair. HDSL2 uses
overlapped phase Trellis-code interlocked spectrum (OPTIS).
IDSL
ISDN based DSL developed originally by Ascend Communications. IDSL
uses 2B1Q line coding and typically supports data transfer rates of
128 Kb/s. Many end users have had to suffice with IDSL service
when full speed ADSL was not available in their area. This
technology is similar to ISDN, but uses the full bandwidth of two
64 Kb/s bearer channels plus one 16 Kb/s delta channel.
MDSL
Usually this stands for multi-rate Digital Subscriber Line (MDSL).
It depends on the context of the acronym as to its meaning. It is
either a proprietary scheme for SDSL or simply a generic
alternative to the more common ADSL name. In the former case, you
may see the acronym MSDSL. There is also another proprietary scheme
which stands for medium-bit-rate DSL. Confused yet?
RADSL
Rate Adaptive Digital Subscriber Line (RADSL) is any rate adaptive
xDSL modem, but may specifically refer to a proprietary modulation
standard designed by Globespan Semiconductor. It uses carrierless
amplitude and phase modulation (CAP). T1.413 standard DMT modems
are also technically RADSL, but generally not referred to as such.
The uplink rate depends on the downlink rate, which is a function
of line conditions and signal to noise ratio (SNR).
SDSL
Symmetric Digital Subscriber Line (SDSL) is a 2-wire implementation
of HDSL. Supports T1/E1 on a single pair to a distance of
11,000 ft. The name has become more generic over time to refer to
symmetric service at a variety of rates over a single loop.
UDSL
Universal DSL. See G.lite.
VDSL
Very High Bit-rate Digital Subscriber Line (VDSL) is proposed for
shorter local loops, perhaps up to 3000 ft. Data rates exceed 10
Mb/s.
Original Article here
Mar 18, 2011
vDSL & vhDSL
Very-high-bitrate DSL (VDSL or VHDSL)[1] is a DSL technology providing faster data transmission (up to 52 Mbit/s downstream and 16 Mbit/s upstream)[2] over a single flat untwisted or twisted pair of copper wires. These fast speeds mean that VDSL is capable of supporting high bandwidth applications such as HDTV, as well as telephone services (voice over IP) and general Internet access, over a single connection. VDSL is deployed over existing wiring used for POTS and lower-speed DSL connections. This standard was approved by ITU in November 2001.
Second-generation systems (VDSL2; ITU-T G.993.2 approved in February 2006) utilize bandwidth of up to 30 MHz to provide data rates exceeding 100 Mbit/s simultaneously in both the upstream and downstream directions. The maximum available bit rate is achieved at a range of about 300 meters; performance degrades as the loop attenuation increases.
Currently, the standard VDSL uses up to 7 different frequency bands, which enables customization of data rate between upstream and downstream depending on the service offering and spectrum regulations. First generation VDSL standard specified both quadrature amplitude modulation (QAM) and discrete multi-tone modulation (DMT). In 2006, ITU-T standardized VDSL in recommendation G.993.2 which specified only DMT modulation for VDSL2.
Let’s us provide you (VDSL/ xDSL filters/ Splitters, Cable & Wire harness, power Cord)
Original Article Here
Second-generation systems (VDSL2; ITU-T G.993.2 approved in February 2006) utilize bandwidth of up to 30 MHz to provide data rates exceeding 100 Mbit/s simultaneously in both the upstream and downstream directions. The maximum available bit rate is achieved at a range of about 300 meters; performance degrades as the loop attenuation increases.
Currently, the standard VDSL uses up to 7 different frequency bands, which enables customization of data rate between upstream and downstream depending on the service offering and spectrum regulations. First generation VDSL standard specified both quadrature amplitude modulation (QAM) and discrete multi-tone modulation (DMT). In 2006, ITU-T standardized VDSL in recommendation G.993.2 which specified only DMT modulation for VDSL2.
Let’s us provide you (VDSL/ xDSL filters/ Splitters, Cable & Wire harness, power Cord)
Original Article Here
Mar 15, 2011
Ikanos chips support 100 Mbps DSL
Ikanos has developed a new set of chips that support 100 Mbps DSL, based on a new standard that supports both channel bonding and vectoring.
Ikanos' new Fusiv Vx185 and Vx183 chips conform to the new G.vector ITU standard, which defines how to achieve 100 Mbps service over traditional copper lines, which by some calculations would be a tenth the cost of achieving the same transmission rates with fiber.
The standard covers bonding for increased rate and reach, ultra-low power and, ultimately, gigabit line rate performance.
These new devices add to Ikanos' NodeScale Vectoring architecture, which spans the central office, remote cabinets in fiber to the node (FTTN) networks, and now the customer premises.
The Fusiv Vx185 integrates support for bonding by natively interfacing directly to two integrated analog front-end devices, Ikanos said. This is designed to allow the coupling of two TCP (twisted copper pair) wires. Together, bonding and vectoring can be combined to push aggregate data rates up to 300Mbps, the company said.
The new Fusiv family of devices also includes the following features:
Full ADSL and VDSL2 support with a single hardware design
Support for all VDSL2 profiles and band plans for Asia, Europe, and North America – 8a, 8b, 8c, 8d, 12a, 17a and 30a
Support for ADSL2+, ADSL2, and ADSL standards
Support for all mandatory and optional features of VDSL2
Exceeds Broadband Forum performance requirements (TR-67, TR-100, and WT- 114)
Support for all wired or wireless networking technologies including Wi-Fi (single or dual-band concurrent modes), HomePNA, HomePlug, Multi-media Over Coax, and ITU G.hn
Integrated SATA interface for the easy addition of network attached storage devices
System level support for high performance IPv6
IPSec and Secure Sockets Layer (SSL) VPN implementation using on-chip cryptographic engines
John Quigley, president and CEO, of Ikanos, said G.Vector support "pushes VDSL performance to the 100 Mbps threshold and beyond at a time when service providers are looking for a cost-effective way to upgrade their existing copper networks in order to compete with DOCSIS 3.0 and FTTH technologies." By Brian Santo
CedMagazine.com - March 15, 2011
Let’s us provide you ( xDSL, VDSL filters/ Splitters, Cable & Wire Harness)
Original Article Here
Ikanos' new Fusiv Vx185 and Vx183 chips conform to the new G.vector ITU standard, which defines how to achieve 100 Mbps service over traditional copper lines, which by some calculations would be a tenth the cost of achieving the same transmission rates with fiber.
The standard covers bonding for increased rate and reach, ultra-low power and, ultimately, gigabit line rate performance.
These new devices add to Ikanos' NodeScale Vectoring architecture, which spans the central office, remote cabinets in fiber to the node (FTTN) networks, and now the customer premises.
The Fusiv Vx185 integrates support for bonding by natively interfacing directly to two integrated analog front-end devices, Ikanos said. This is designed to allow the coupling of two TCP (twisted copper pair) wires. Together, bonding and vectoring can be combined to push aggregate data rates up to 300Mbps, the company said.
The new Fusiv family of devices also includes the following features:
Full ADSL and VDSL2 support with a single hardware design
Support for all VDSL2 profiles and band plans for Asia, Europe, and North America – 8a, 8b, 8c, 8d, 12a, 17a and 30a
Support for ADSL2+, ADSL2, and ADSL standards
Support for all mandatory and optional features of VDSL2
Exceeds Broadband Forum performance requirements (TR-67, TR-100, and WT- 114)
Support for all wired or wireless networking technologies including Wi-Fi (single or dual-band concurrent modes), HomePNA, HomePlug, Multi-media Over Coax, and ITU G.hn
Integrated SATA interface for the easy addition of network attached storage devices
System level support for high performance IPv6
IPSec and Secure Sockets Layer (SSL) VPN implementation using on-chip cryptographic engines
John Quigley, president and CEO, of Ikanos, said G.Vector support "pushes VDSL performance to the 100 Mbps threshold and beyond at a time when service providers are looking for a cost-effective way to upgrade their existing copper networks in order to compete with DOCSIS 3.0 and FTTH technologies." By Brian Santo
CedMagazine.com - March 15, 2011
Let’s us provide you ( xDSL, VDSL filters/ Splitters, Cable & Wire Harness)
Original Article Here
Feb 23, 2011
New VDSL Subscribers to Quadruple by 2014
New subscribers to very-high-bitrate digital subscriber line (VDSL) service are set to nearly quadruple by 2014 as more competitors begin to ramp up their support for the technology, according to new IHS iSuppli research.
The number of new annual VDSL subscriber additions will grow to 60.1 million in 2014, up from just 15.6 million in 2009. A total of 23.3 million new VDSL subscribers were added in 2010.
“The telco broadband market is undergoing a seismic shift,” said Lee Ratliff, senior analyst for broadband and digital home at IHS. “Newer technologies such as VDSL and fiber-to-the-home (FTTH) have begun to emerge, while interest is waning within the industry for traditional broadband technologies like cable and asymmetric digital subscriber line (ADSL).”
Meanwhile, consumers also are willing to adopt the latest technology in order to get faster access to content.
“As the broadband market switches from a focus on data to stressing wideband multi-service and multimedia, fatter pipes to receive content are becoming more desired,” Ratliff said. “Broadband rates of 1 to 5 megabits per second (Mbps) were adequate when people were only surfing the Internet, but peer-to-peer file sharing, online gaming, streaming audio, voice over Internet protocol (VoIP) and Internet protocol television (IPTV) now all could be operating within one home. Such heavy activity points likely to a future in which 50 to 100Mbps will be standard—which fits exactly with VDSL’s capabilities.”
Ikanos Faces Increased Competition
Long dominated by Ikanos Communications Inc., the VDSL semiconductor market recently has become much more competitive. While Ikanos still leads with 55 percent market share, that figure is down from 75 percent only a year ago with the trend unlikely to stop anytime soon. Lacking in intellectual property (IP) to create a single-chip gateway solution, Ikanos instead has centered its focus on advanced VDSL technology such as vectoring and bonding. Such a strategy will continue to supply the company with the most advanced technology, but without having an integration roadmap, the door also has opened for competitors Broadcom Corp. and Lantiq to grab their fair market share.
Moreover, a new competitor with a history in the ADSL market, Ralink Technology Corp.—which recently acquired ADSL maker TrendChip Technologies Corp.—will soon bring a VDSL chip to the market in the first quarter of 2011. Ralink promises to bring a new level of cost competitiveness to the VDSL market, further squeezing Ikanos.
Falling Prices Mean More Opportunities
IHS believes that VDSL chipset pricing will decline in price, thereby increasing integration of the technology among broadband suppliers and consumers. This is in direct contrast with ADSL, which is unlikely to see any further declines in the average selling price (ASP) of its chipsets.
The decline in VDSL pricing will result in rapidly decreasing ASPs and innovation among chipset features.
More: Competition Heats Up in VDSL Semiconductor Market Wednesday, February 23rd, 2011
Let’s us know if we could able to supports you and your team
Original Article Here
The number of new annual VDSL subscriber additions will grow to 60.1 million in 2014, up from just 15.6 million in 2009. A total of 23.3 million new VDSL subscribers were added in 2010.
“The telco broadband market is undergoing a seismic shift,” said Lee Ratliff, senior analyst for broadband and digital home at IHS. “Newer technologies such as VDSL and fiber-to-the-home (FTTH) have begun to emerge, while interest is waning within the industry for traditional broadband technologies like cable and asymmetric digital subscriber line (ADSL).”
Meanwhile, consumers also are willing to adopt the latest technology in order to get faster access to content.
“As the broadband market switches from a focus on data to stressing wideband multi-service and multimedia, fatter pipes to receive content are becoming more desired,” Ratliff said. “Broadband rates of 1 to 5 megabits per second (Mbps) were adequate when people were only surfing the Internet, but peer-to-peer file sharing, online gaming, streaming audio, voice over Internet protocol (VoIP) and Internet protocol television (IPTV) now all could be operating within one home. Such heavy activity points likely to a future in which 50 to 100Mbps will be standard—which fits exactly with VDSL’s capabilities.”
Ikanos Faces Increased Competition
Long dominated by Ikanos Communications Inc., the VDSL semiconductor market recently has become much more competitive. While Ikanos still leads with 55 percent market share, that figure is down from 75 percent only a year ago with the trend unlikely to stop anytime soon. Lacking in intellectual property (IP) to create a single-chip gateway solution, Ikanos instead has centered its focus on advanced VDSL technology such as vectoring and bonding. Such a strategy will continue to supply the company with the most advanced technology, but without having an integration roadmap, the door also has opened for competitors Broadcom Corp. and Lantiq to grab their fair market share.
Moreover, a new competitor with a history in the ADSL market, Ralink Technology Corp.—which recently acquired ADSL maker TrendChip Technologies Corp.—will soon bring a VDSL chip to the market in the first quarter of 2011. Ralink promises to bring a new level of cost competitiveness to the VDSL market, further squeezing Ikanos.
Falling Prices Mean More Opportunities
IHS believes that VDSL chipset pricing will decline in price, thereby increasing integration of the technology among broadband suppliers and consumers. This is in direct contrast with ADSL, which is unlikely to see any further declines in the average selling price (ASP) of its chipsets.
The decline in VDSL pricing will result in rapidly decreasing ASPs and innovation among chipset features.
More: Competition Heats Up in VDSL Semiconductor Market Wednesday, February 23rd, 2011
Let’s us know if we could able to supports you and your team
Original Article Here
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