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Entries in vectoring (6)


Sckipio’s silicon to enable gigabit services  

Sckipio’s newest broadband chipset family delivers 1.2 gigabits of aggregate bandwidth over 100m of telephone wire.

The start-up’s SCK-23000 chipset family implements the ITU’s Amendment 3 212a profile. The profile doubles the spectrum used from from 106MHz to 212MHz, boosting the broadband rates. In contrast, VDSL2 digital subscriber line technology uses 17MHz of spectrum only.

“What the telcos want is gigabit services,” says Michael Weissman, vice president of marketing at Sckipio. “This second-generation [chipset family] allows that.”

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Sckipio improves’s speed, reach and density  

Sckipio is using this week’s Broadband World Forum event in London to highlight its latest activities 

Sckipio has enhanced the performance of its chipset, demonstrating 1 gigabit data rates over 300 meter of telephone wire. The broadband standard has been specified for 100 meters only. The Israeli start-up has also demonstrated 2 gigabit performance by bonding two telephone wires.


Michael Weissman

“Understand that is still immature,” says Michael Weissman, co-founder and vice president of marketing at Sckipio. “We have improved the performance of by 40 percent this summer because we haven’t had time to do the optimisation until now.”

The company also announced a 32-port distribution point unit (DPU), the aggregation unit that is fed via fibre and delivers to residences. 

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10 Gigabit Plain Old Telephone Service

Bell Labs has sent unprecedented amounts of data down a telephone wire. The research arm of Alcatel-Lucent has achieved one-gigabit streams in both directions over 70m of wire, and 10-gigabit one-way over 30m using a bonded pair of telephone wires.

Keith RussellThe demonstrations show how gigabit-speed broadband could use telephone wire to bridge the gap between a local optical fibre point and a home. The optical fibre point may be located at the curbside, on a wall or in an apartment's basement.    

Service providers want to deliver gigabit services to compete with cable operators and developments like Google Fiber, the Web giant's one-gigabit broadband initiative in the US. Such technology will help the operators deploy gigabit broadband, saving them time and expense. 

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Apr252014 adds to the broadband options of the service providers


Source: Alcatel-Lucent

Competition is commonly what motivates service providers to upgrade their access networks. And operators are being given every incentive to respond. Cable operators are offering faster broadband rates and then there are initiatives such as Google Fiber.

Internet giant Google is planning 1 Gigabit fibre rollouts in up to 34 US cities covering 9 metro areas. The initiative prompted AT&T to issue its own list of 21 cities it is considering to offer a 1 Gigabit fibre-to-the-home (FTTH) service.

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VDSL2 vectoring explained

Several system vendors including Adtran, Alcatel-Lucent and ZTE have announced vectoring technology that boosts the performance of very-high-bit-rate digital subscriber line (VDSL2) broadband access technology. Vectoring is used to counter crosstalk - signal leakage between the telephony twisted wire pairs that curtails VDSL2's bit rate performance – as is now explained.

Technology briefing

There is a large uncertainty in the resulting VDSL2 bit rate for a given loop length. With vectoring this uncertainty is almost removed

Paul Spruyt, Alcatel-Lucent




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DSL: Will phantom channels become real deployments?

Alcatel-Lucent’s Bell Labs has announced it has achieved a data rate of 300 megabits-per-second (Mbps) over 400m using digital subscriber line (DSL) technology. 

Alcatel-Lucent is promoting its DSL Phantom Mode technology as a complement to fibre-to-the-x (FTTx) technology. Operators can use the technology to continue to extend services offerings to existing DSL subscribers as they roll out FTTx over the next decade or more.

But one analyst believes the technology could take years to commercialise and questions whether the announcement is not sending a wrong message to the industry by providing an alternative to fibre.


“The investment required to upgrade DSL is quite small”

Stefaan Vanhastel, Alcatel-Lucent





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