Comcast promises huge boost to cable upload speeds by end of 2023

Enlarge / Comcast’s xFi Advanced Gateway.

Getty Images | Jeff Fusco

Comcast introduced as we speak that it has examined “the final technical component necessary to deliver multi-gigabit symmetrical speeds” and mentioned it is on monitor to ship multi-gigabit obtain and upload speeds to a minimum of some cable clients “before the end of 2023.” The take a look at utilizing Broadcom gear delivered obtain speeds of 6Gbps and uploads of 4Gbps, Comcast mentioned.

Cable broadband lags far behind fiber-to-the-home in upload speeds, a frustration for a lot of Internet customers who lack entry to fiber. Comcast and different cable firms have been promising a serious improve to uploads for years with out ever saying precisely when the development would attain clients.

Comcast is beginning to get a bit extra particular—though that “end of 2023” promise would not specify what share of clients will get the improve when it first rolls out. Upgrading Comcast’s whole cable territory is predicted to be a multi-year course of.

“With this test completed, Comcast will launch live trials later this year, and will begin delivering 10G-powered multi-gig symmetrical services to customers before the end of 2023,” Comcast mentioned. (10G is a advertising time period the cable business makes use of to describe 10-gigabit-per-second speeds.)

Comcast didn’t say what it can cost clients for multi-gigabit symmetrical service or whether or not the improve will likely be paired with any modifications to the information cap imposed in most of Comcast’s territory. Although the improve will not require changing the cables going into clients’ houses, getting all the suitable gear in place all through Comcast’s community will take a couple of years.

Comcast’s stubbornly low upload speeds begin to rise

In October 2017, business R&D consortium CableLabs introduced the completion of a DOCSIS model that might present obtain and upload speeds of 10Gbps. Seemingly envious of hype over wi-fi 5G networks, cable foyer group NCTA in January 2019 launched a “10G” advertising marketing campaign. It promised “symmetrical speeds that are up to 10 times faster than today’s fastest networks.”

But precise upload speeds have remained stubbornly low on cable networks, which have been initially designed for supply of tv programming moderately than broadband. Comcast’s cable upload speeds topped out at 35Mbps for a few years, and clients had to purchase the dearer gigabit-download plan simply to get 35Mbps uploads. Upload speeds on cheaper plans have been as little as 3Mbps, as we wrote final yr.


But that is beginning to change. Comcast on September 8 introduced availability of multi-gigabit cable obtain speeds and upload speeds starting from 75Mbps to 200Mbps, however solely in sure markets at first (Colorado Springs, Colorado; Augusta, Georgia; and Panama City Beach, Florida).

Comcast mentioned this multi-gigabit rollout—to be clear, that is multi-gigabit obtain speeds with uploads as excessive as 200Mbps—will likely be “available in 34 cities and towns before the end of 2022” and “more than 50 million homes and businesses before the end of 2025.” Comcast clients are thus doubtless to get a extra modest boost to upload speeds earlier than they see the multi-gigabit uploads teased in as we speak’s announcement.

Comcast has additionally offered symmetrical fiber-to-the-home Internet since 2015 however at a lot greater costs than cable and never all through its complete territory. The DOCSIS upgrades that may prolong multi-gigabit symmetrical speeds to Comcast cable will hopefully be provided at costs extra reasonably priced than Comcast fiber, which prices $300 a month.

Full Duplex DOCSIS

Delivering symmetrical multi-gigabit speeds over current cable wires will likely be achieved with the “Full Duplex” improve to DOCSIS, the Data Over Cable Service Interface Specification used throughout the business. Comcast mentioned:

Comcast beforehand accomplished profitable, world-first exams of 10G community and modem applied sciences, together with demonstrating a whole network-to-home 10G loop. The take a look at, introduced as we speak at SCTE EXPO, confirmed the power to ship Full Duplex DOCSIS 4.0 (FDX) companies over newly designed FDX amplifiers. FDX was initially designed for community environments with out radio frequency amplifiers, so the brand new FDX amplifiers make it dramatically simpler to prolong the advantages of 10G to each buyer inside attain of the community.

For the take a look at, Comcast inserted new 10G amps, constructed on a Broadcom-developed reference design, into a whole 10G community loop utilizing beforehand examined DOCSIS 4.0 modem and community applied sciences. The crew demonstrated obtain speeds of 6Gbps and upload speeds of 4Gbps throughout a whole six-amplifier cascade, typically referred to as “N+6”. This structure is inclusive of the overwhelming majority of the Comcast community and is well and shortly replicated the place community environments might differ. As a outcome, the profitable take a look at is vital to delivering 10G to all Comcast clients.

In addition to the upload and obtain boosts, Comcast mentioned the improve “will drive significant improvements in latency performance.”

Although the full-duplex improve in all probability will not occur as shortly as clients need, Comcast famous the benefit of having the ability to improve speeds with out changing wires. The DOCSIS improve will let Internet suppliers “deliver enhanced speeds and performance to hundreds of millions of people over the connections already installed in their homes, without the need to dig up yards and neighborhoods, or pick and choose who gets faster speeds and who doesn’t,” Comcast mentioned.


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