Broadcom Brings Telcos a Combined G.fast, Vectoring and VDSL

– ‘Unlocks’ Gigabit Speeds in Telcos’ Existing Copper Wire Networks
– ‘Worldwide Support for G.fast Is Growing’

Subscribers, government regulators and politicians plus strong competition from the cable TV companies are causing telcos to seriously consider every means for quickly increasing the broadband speeds they can offer over their copper wire telephone networks.

Broadcom, the DSL chipmaking king, jumped in to the G.fast market with a bang at this year’s Broadband World Forum. Its new chipset family, the BCM65200/900, will enable telcos to deliver fiber-like Gigabit performance over currently installed twisted pair copper cables. Broadcom called it “unlocking” the Gigabit-speed potential of telcos’ existing copper wire networks and said it provides telcos “a path to highly-competitive broadband services over the next several years.”

The telcos’ competition is, of course, the cablecos whose existing DOCSIS technology provides much faster broadband speeds than telcos offer — with the exception of all-fiber networks.

Most telcos use VDSL broadband technology so Broadcom’s BCM65200/900, for use in distribution points (where fiber meets copper), combines VDSL, G.fast and vectoring to provide telcos with the industry’s most integrated G.fast and G.vector infrastructure solution.

Broadcom said the BCM65200/900 family is “the only commercially available chipset solution to provide operators a means to selectively deploy G.fast to new customers in the same system as VDSL2, preventing the forklift upgrade required for alternative solutions.”

The chipset supports up to 36 lines of VDSL2 or six lines of G.fast, plus it has high-speed vector interfaces. Broadcom said the BCM65200/900 family “delivers the most power-efficient system solution for high-density G.vector DSLAMs as well as new G.fast-based fiber-to-the-distribution point (FTTdp) architectures.”

The BCM65200/900 family has full backward-compatibility to existing VDSL and ADSL technologies, including simultaneous G.fast and G.vector crosstalk cancellation.

It said its G.fast technology for distribution points has “the industry’s highest density solution for G.fast, with bandwidth up to 1 Gbps over existing twisted pair of copper wires” — in short, existing copper telephone wires. The VDSL technology that’s in the chipset has “the world’s highest integration VDSL with 2x the density of its previous VDSL chipsets that support up to 36 ports of fully-vectored VDSL2.”

Four features that seem especially important to telcos are:
– Simultaneous support of G.fast, G.vector, VDSL2 and ADSL protocols on a per line basis
– Reduces VDSL2 power consumption per port up to 30% compared to its prior chipsets.
– Chip-, board- and system-level vectoring modes
– Integrates all 10G-KR vectoring interfaces, which lowers the bill-of-materials, size and power consumption and provides a direct interface to the line cards.

Broadcom said it’s sending sample quantities of the BCM65200/900 family to makers of telco equipment.

Greg Fischer, Broadcom’s SVP and general manager of its broadband carrier access products, said, “As an industry leader in G.vector and G.fast technologies, Broadcom is supporting the in-progress deployments and trials of operators evaluating cost-effective ways to boost the performance of their broadband services across existing access networks. Worldwide support for G.fast is growing as it enables operators to provide FTTH-like speeds without the cost associated with fiber deployments.”

We take Fischer’s statement as …

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