HKT is first to deploy 50G PON technology in Hong Kong

HKT [1.] has become the first telecommunication service provider in Hong Kong to adopt the latest 50G PON technology, as the telco prepares to ramp up the delivery of  applications that require ultra-high-speed broadband Internet connections for both home and commercial customers.

Note 1.  HKT Limited is a company incorporated in the Cayman Islands with limited liability.

50G fiber based broadband offers a significant step up in speed, with a specification download speed of up to 50Gbps.  Paired with the latest Wi-Fi 7 technology, the remarkable increase in bandwidth supports smooth simultaneous multi-device connectivity of all kinds for users both at home and in a commercial setting. Latency also improves by a substantial 27% on average compared to that of a 10G fiber network. [The above latency is only applicable to designated servers. Network latency in other areas will vary depending on the operational load of individual servers as well as network traffic.]

Bruce Lam, CEO, Consumer, HKT, said, “NETVIGATOR has always been at the forefront of the market. We are delighted to become the first telecommunication service provider in Hong Kong to adopt 50G PON technology. With the development of smart homes, demand for high-speed multi-device connections has been increasing to cater for activities such as 8K video streaming, large video file transfer and sharing at home, online gaming and even real-time financial market monitoring and trading. We will continue to explore cutting-edge technologies to meet our customers’ future connectivity needs.”

Steve Ng, Managing Director, Commercial Group, HKT, said, “HKT Enterprise Solutions has consistently provided diverse digital solutions for our commercial customers. As AI and cloud applications become ubiquitous, enterprise customers’ demand for bandwidth, speed and low latency have continued to elevate.

For example, employees need to use cloud services, collaboration tools, and AI solutions within the office environment. Schools are actively implementing e-learning and remote teaching. Large-scale events such as exhibitions and concerts generate high demands for live streaming or AR/VR experience solutions. Through this latest technology, we are preparing ourselves for the network needs of different customers.”

By applying the innovative 50G PON technology HKT is able to further enhance the performance of its existing fiber network with ease. Currently, HKT’s 10G fiber broadband network covers over 2.4 million households across 50,000 residential buildings, as well as 8,000 commercial buildings in Hong Kong.

About HKT:

HKT is a technology, media, and telecommunication leader with more than 150 years of history in Hong Kong. As the city’s true 5G provider, HKT connects businesses and people locally and globally.

Our end-to-end enterprise solutions make us a market leading digital transformation partner of choice for businesses, whereas our comprehensive connectivity and smart living offerings enrich people’s lives and cater for their diverse needs for work, entertainment, education, well-being, and even a sustainable low-carbon lifestyle. Together with our digital ventures which support digital economy development and help connect Hong Kong to the world as an international financial centre, HKT endeavours to contribute to smart city development and help our community tech forward.

For more information, please visit


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Neos Networks launches 10Gbps Managed Dedicated Internet Access (DIA)

UK business network operator Neos Networks today announced a major upgrade of its Managed Dedicated Internet Access (Managed DIA) service to provide capacities up to 10Gbps as standard. Previously available up to 1Gbps, the upgrade provides a fully managed, enterprise-grade fibre solution for UK organisations grappling with ever-increasing bandwidth demand and the need for reliable access to the internet.

The latest upgrade means Neos Networks customers across the UK can access the same bandwidths across its Wires-only DIA, and Managed DIA variants, with a clearer upgrade path. The upgrade also promises to simplify the hardware and support available for customers. Neos Networks manages both the maintenance and break/fix of the router, meaning the customer’s network or IT team can focus on other areas of their business.

Neos Networks’ extensive network infrastructure underpins the UK’s digital economy, powering the UK’s critical infrastructure, and connecting public services, telcos and enterprises of all shapes and sizes. This latest upgrade gives such organisations more flexible and scalable options to meet their unique connectivity needs. Devices are monitored and managed 24/7 by Neos, and the service is also optimised for reduced energy consumption and rack space when combined with services such as Neos Networks access tails.

The UK’s connectivity demands are continuously increasing, spurred by ongoing digital transformation and new technology like 5G, IoT and artificial intelligence. In 2020, Neos Networks launched a 10Gbps Wires-only DIA service in readiness for this increasing customer demand. This latest upgrade of Managed DIA means customers who are currently making use of a large number of 1Gbps circuits can look to scale their bandwidth as part of the same service. Neos is making this easier than ever and is poised to deliver across UK telcos, enterprises and critical and national infrastructure.

Mark Charlesworth, Director of Product, at Neos Networks, said: “Our continued investment in our business internet proposition means Neos Networks is now able to provide the same scalable bandwidth across a range of different service models throughout the UK. This provides a much-simplified upgrade path for customers with increasing bandwidth requirements, delivering the level of service they need in a flexible and scalable way”.

Through Managed DIA, Neos Networks steps closer to the customer’s environment, beyond a traditional wholesale fibre infrastructure role. This includes more proactive monitoring, and advanced analytics to support network maintenance and availability. With the impact of the loss of service only becoming more critical for organisations across the UK, Neos Networks’ MPLS core network also ensures that services via Managed DIA are highly resilient.

Neos Networks offers a Managed DIA service supported by 24/7 technical assistance, providing businesses with a broad selection of last-mile connectivity providers, along with diverse and resilient options. The strength of this service lies in Neos Networks’ extensive network coverage, which includes more than 676 high-speed Ethernet Points of Presence across the nation. This expansive reach enhances the quality of its DIA services, ensuring businesses have reliable access. Importantly, all traffic to and from a business’s network is securely transported over Neos Networks’ robust network and IP platform. This guarantees instantaneous access and a high-quality service experience, making it an ideal choice for businesses with data-intensive, real-time applications.


Neos Networks launches 10Gbps Managed Dedicated Internet Access

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STELLAR Broadband offers 10 Gigabit Symmetrical Fiber Internet Access in Hudsonville, Michigan

Orange España: commercial deployment of 10 Gbps fiber in 5 cities

Comcast launches symmetrical 10-Gigabit speeds over Ethernet FTTP

Comcast demos 10Gb/sec full duplex with DOCSIS 4.0; TDS deploys symmetrical 8Gb/sec service


Comcast’s DOCSIS 4.0 Deployment: Multi-Gig Symmetrical Speeds to be offered across the U.S.

Next week, Comcast will begin to deploy DOCSIS 4.0 technology (described below) which can deliver multi-gigabit symmetrical speeds to customers over the connections that already exist in tens of millions of homes in Comcast markets across the country.  Xfinity customers in Colorado Springs will be able to sign up online for the new DOCSIS 4.0-powered Internet plans next week.

As a part of the launch, Comcast will introduce a new portfolio of symmetrical products for residential customers. Comcast will begin rolling out DOCSIS 4.0 to select neighborhoods in Colorado Springs, CO, and will launch new markets throughout the country over the next few years. Select areas of Atlanta, GA and Philadelphia, PA are expected to begin rolling out before the end of this year.

“The ubiquity of our network, which is already accessible to tens of millions of homes, provides us with an incredible opportunity to bring multi-gigabit upload and download speeds to communities across the country with the scale and efficiency that no other provider can replicate,” said Dave Watson, President & CEO, Comcast Cable. “Our connectivity experience, powered by the Xfinity 10G Network, will allow us to deliver speeds up to 10 Gbps over our traditional network to virtually all our customers, plus even better reliability, lower latency, and the best in-home WiFi coverage.”

“We’re entering the next phase of this industry leadership with DOCSIS 4.0 technology to introduce X-Class Internet products that will revolutionize the way our customers get online today and many years into the future,” Watson added.

Symmetrical 10 Gbps service based on fiber-to-the-home (FTTH) technology is already available in all of Comcast’s markets, and as part of its continued network evolution and the introduction of DOCSIS 4.0, multi-gig symmetrical speeds are rolling out.

New and existing residential customers connected via DOCSIS 4.0 will have access to Comcast’s newly introduced next-generation X-Class Internet portfolio. X-Class speed tiers include X-300 Mbps, X-500 Mbps, X-1 Gbps and X-2 Gbps upload and download speeds and low lag for the ultimate live sports streaming experience on Peacock, smooth connections on work calls, and ultra-responsive gaming.

“The enhancements that we have been making to our network over the past few years have been foundational to creating an award-winning network architecture that is fully virtualized and capable of delivering these exciting capabilities to our customers, said Elad Nafshi, Chief Network Officer, Comcast Cable.  “This is an awesome achievement and I’m incredibly proud of the team of brilliant technologists here at Comcast who have worked relentlessly to make DOCSIS 4.0 a reality ahead of schedule,” Elad added.
Comcast’s path to DOCSIS 4.0 leverages breakthrough network technology known as “Full Duplex” that utilizes the same network spectrum to dramatically increase upstream speeds without sacrificing downstream speeds.

The DOCSIS 4.0 launch is the latest in a long line of world firsts that Comcast has spearheaded in the effort to implement DOCSIS 4.0. In April 2021, Comcast conducted the first-ever live test of full duplex DOCSIS and later that year tested the world’s first 10G connection all the way from the network to a modem. In 2022, Comcast conducted a world-first live trial and connected a business location in the Philadelphia region to its live network including a DOCSIS 4.0-enabled 10G node and multiple cable modems. In February 2023, the company marked another major milestone in the nation’s largest and fastest multi-gig deployment by announcing its latest Xfinity 10G Network upgrade launched to 10 million homes and businesses.

In addition to Comcast’s efforts to deploy DOCSIS 4.0 and other 10G upgrades across its footprint, the company continually invests in delivering a superior connectivity experience that is not only fast but is also reliable with less lag.

  • Award Winning Tech – Comcast has lead the industry in deploying technologies within its network to enhance speed, reliability and latency like distributed access architecture (DAA) and a vCMTS, which earned an Emmy® Award for Technology and Engineering.
  • Smart Network – Comcast-developed technology like Comcast Octave and Xfinity Fiber Meter (XMF), enables optimized network performance by proactively identifying and even repairing network impairments that impact customers’ services.
  • Storm-Ready WiFi – In August 2023, Comcast introduced Storm-Ready WiFi, the first product of its kind offered by an Internet provider designed to maintain a connection during a power or local outage.
  • Low Latency – Deployed Active Queue Management (AQM) system nationally and currently trialing the latest CableLabs low latency DOCSIS (LLD) specification.

DOCSIS Technology

Data Over Cable Service Interface Specification (DOCSIS) was first introduced in 1997 as a solution for high-speed data to be transmitted over existing cable wires, replacing dial-up phone lines for an Internet connection. Comcast has been a leader in deploying DOCSIS updates to deliver faster speeds to all the homes and businesses in its service areas. In early 2016, Comcast was the first to introduce DOCSIS 3.1-powered Gigabit Internet service and rapidly expanded Gigabit speeds across the country to more locations than any other provider.


Fiber Connect 2023: Telcos vs Cablecos; fiber symmetric speeds vs. DOCSIS 4.0?

Comcast launches symmetrical 10-Gigabit speeds over Ethernet FTTP

Comcast demos 10Gb/sec full duplex with DOCSIS 4.0; TDS deploys symmetrical 8Gb/sec service

Comcast to roll out DOCSIS 4.0 and Multi-Gig speeds in 2023; Fiber (not FWA) is the real competitor

Comcast launches symmetrical 10-Gigabit speeds over Ethernet FTTP

Comcast has announced a new symmetrical 10-Gigabit service tier for its Gigabit Pro fiber customers and reiterated a plan to bring multi-gigabit options to millions of cable internet customers. The move comes as Comcast prepares to launch DOCSIS 4.0 capabilities for cable customers by the end of the year.

Launched as a 2-Gig residential broadband service back in 2015, Gigabit Pro has been upgraded in recent years. Before heading to 10-Gig, the service delivered symmetrical speeds of 6 Gbit/s. Billed as a premium offering, Gigabit Pro runs $299 per month, plus installation costs.  Comcast has not announced how many of its 32.32 million broadband subscribers have opted for Gigabit Pro.

Comcast began field testing 10-Gig capabilities for customers shortly thereafter, with some users stating on Reddit in October 2022 that they were starting to see these speeds.

According to the latest data from the Federal Communications Commission (FCC), Comcast today primarily offers fiber to the premises in the areas around Chicago, Detroit, Indianapolis, Nashville, Knoxville, Atlanta, Jacksonville, Miami and West Palm Beach.

Comcast Cable EVP and Chief Network Officer Elad Nafshi told Fierce that the product is technically available nationwide, not just in areas where it has fiber. If a cable customer decides they want 10G, Comcast will come in and upgrade their drop from coaxial cable to fiber, he said.  The “highly-targeted” Gigabit Pro service continues to be delivered on an Ethernet-based FTTP platform.

In order to fully take advantage of the speeds now available on the fiber network, Comcast said users will need a 10G router or firewall, a desktop computer with a PCIe expansion slot, a 10G 850 nm multimode fiber (MMF), small form-factor pluggable (SFP) transceiver, a 10G PCIe network interface controller (NIC) adapter with small form-factor pluggable (SFP) cage and a multimode fiber LC cable patch.  Here are all the requirements for 10 Gig service:

For maximum speeds of 10 Gbps on a single computer, you’ll need the following:

  • A desktop computer with available PCIe expansion slot.
  • A 10G PCIe network interface controller (NIC) adapter with small form-factor pluggable (SFP) cage.
  • A 10G enhanced, 850 nm multimode fiber (MMF), small form-factor pluggable (SFP) transceiver.
  • A multimode fiber (MMF) LC patch cable.

To achieve maximum speeds of 10 Gbps on more than one of your devices connected to the fiber handoff, you will need a compatible router or firewall with throughput of 10 Gbps (or greater) along with the following:

  • A 10G WiFi router or firewall.
  • A 10G 850 nm multimode fiber (MMF), small form-factor pluggable (SFP) transceiver.
  • All additional equipment from the single computer requirements for each connected computer to reach 10 Gbps from the router or firewall. The actual number of devices and configurations supported varies by the brand and model of the router or firewall.

Nafshi told Fierce in February that the operator isn’t planning to overlay its cable network with fiber anytime soon. However, he noted the distributed access architecture it is adopting ahead of its DOCSIS 4.0 rollout is opening the door for more fiber deployments.

Though fiber advances may be moving faster, Comcast is also investing in upgrades to its cable system. It launched a new cable broadband tier offering 2 Gbps downstream and 200 Mbps upstream in September 2022. In October, it made a 2 Gbps/100 Mbps tier available to cable customers across 14 states in the Northeastern U.S.

Comcast said it is still planning to make multi-gig speeds available to more than 50 million locations by the end of 2025 and expects to begin rolling out DOCSIS 4.0 before the end of this year.

Nafshi told Fierce it is “heads down hardening and operationalizing products to meet the target deadline” for DOCSIS 4.0 and said the launch will by its nature include the introduction of a new speed tier.

“DOCSIS 4.0 will enable us to launch greater speeds and more speed symmetry when we launch, which by definition means it’s going to be a new tier service because we don’t currently offer those symmetrical tiers,” he concluded. “A lot more to come.”


Comcast demos 10Gb/sec full duplex with DOCSIS 4.0; TDS deploys symmetrical 8Gb/sec service

Ethernet Alliance multi-vendor interoperability demo (10GbE to 800GbE) at OFC 2023

STELLAR Broadband offers 10 Gigabit Symmetrical Fiber Internet Access in Hudsonville, Michigan

STELLAR Broadband, a fiber internet and technology service provider, will provide leading edge technologies and Internet connectivity up to 10Gbps to Elmwood Lake Apartments in Hudsonville, Michigan.

Elmwood Lake Apartments is a suburban haven of elevated comfort, where sweet serenity meets desirable convenience. From cozy interiors and relaxing leisure spaces to an idyllic setting next to private Elmwood Lake, the welcoming apartments in Hudsonville, MI, are ready to deliver a heightened living experience.

“With STELLAR Broadband, residents of Elmwood Lake Apartments will enjoy the fastest and most reliable internet service available. STELLAR Broadband’s fiber optic network provides symmetrical speeds of up to 10Gbps so residents can stream, game, and work from home without any lag or buffering,” said Richard Laing, president of STELLAR Broadband.

“Bosgraaf Homes has been building homes in West Michigan for four generations. Over the years, we’ve seen the industry change dramatically thanks to advances in technology. Construction methods have evolved, and the amenities that homeowners expect have grown more sophisticated. We’re grateful for our partnership with STELLAR Broadband, a company that has been at the forefront of the industry for 22 years. Their experience and leadership have helped us make the transition into multi-family housing,” said Mike Bosgraaf, president of Bosgraaf Homes.

The first in the U.S. to bring 10Gbps Internet to the apartment in student housing, STELLAR today serves over 149 communities totaling over 10,000 residents with a wide range of technology solutions, from managed Wi-Fi, TV, and access control to security.                                                                                                                                                                                                                                         

“DTN is excited to partner with Bosgraaf Homes and STELLAR Broadband to provide Elmwood Lake residents with a unique and enjoyable experience. Bosgraaf is building beautiful homes that will be easy to lease, and STELLAR will provide residents and our office with the best possible internet service,” said Dayle Braden, DTN property manager.

“We’ve seen and have been on the forefront of technology evolving from a desired amenity to a necessity. We are proud to partner with Bosgraaf to provide the high-quality technology that their residents expect and deserve,” Laing stated.

About Spartan Net Co, dba STELLAR Broadband:
STELLAR Broadband is the largest residential fiber internet service provider in Michigan, servicing over 149 communities with multi-Gigabit fiber internet. STELLAR provides technology design and installation services for the full portfolio of technologies for multi-tenant developments, including network design, structured wiring, consulting, door entry and access control, engineered Wi-Fi, security, voice, television services, and various Internet of Things solutions. To learn more, visit:


Comcast demos 10Gb/sec full duplex with DOCSIS 4.0; TDS deploys symmetrical 8Gb/sec service

Comcast announced in a press release it successfully tested a symmetrical multi-gigabit DOCSIS 4.0 connection on its live network, taking a major step toward “offering 10G-enabled services” in the second half of 2023.  In Philadelphia, where Comcast is headquartered, it connected service at an undisclosed business location using multiple cable modems and a DOCSIS 4.0-enabled 10G node. If you’re wondering what 10G means, the answer is — more than 5G. As we noted in 2019, the cable industry rolled out its marketing term just in time to have something that’s twice as many Gb/sec as 5G wireless has.

DOCSIS 4.0 technology should enable download speeds of up to 10Gbps with 6Gbps uploads, and Comcast said a lab test in January achieved more than 4Gbps speed in both directions.

Earlier this year, Comcast announced it was working on rolling out multi-gig Internet speeds to more than 50 million residences and businesses in the U.S. by the end of 2025. The company planned on deploying 2Gbps speeds to 34 cities by the end of this month and has also given a slight bump to download speed on internet service in many areas.

The advantage of 10G tech is that it should make multi-gig speeds available for both downloads and uploads (currently, Comcast’s gigabit plans include upload speeds of just 200Mbps), just as it is with fiber optic internet connections. However, for anyone considering upgrading, we should note that you will probably need another new cable modem.

Ideally, this will increase speeds for those in places where fiber isn’t available, especially non-metropolitan areas. And in places that have competition, it measures closer against rivals that deliver fiber services, such as VerizonAT&TGoogle, and Frontier Communications, which are already offering some customers symmetrical multi-gigabit connections.

“We started this year with the announcement of our world-first test of 10G modem technology capable of delivering multi-gig speeds to homes and, as of today, 10G is a reality with the potential to transform and evolve the Internet as we know it,” said Elad Nafshi, EVP and Chief Network Officer at Comcast Cable. “It’s been an incredible year of progress, and we look forward to continuing to refine and harden our 10G technology as we work to make this service—and all its incredible benefits—available to all customers in the years ahead.”


Separately, TDS Telecom [1.] said its new symmetrical 8Gb/sec (gig) service is already available in more than 75 of its fiber markets and runs $295 per month.  While most U.S. operators [2.] are sticking with 2-gig as their top tier product for now, a handful of others have already pushed further into multi-gig territory. AT&T and Ziply Fiber, for instance, both offer residential plans providing up to 5 Gbps. And fewer still have gone beyond that. Lumen Technologies introduced an 8-gig tier for its Quantum Fiber service in August and Google Fiber has announced plans to trot out 5-gig and 8-gig plans in early 2023. Lumen’s service costs $300 per month.

Note 1.  TDS Telecom offers internet service across 31 states with the greatest coverage in Wisconsin, Tennessee, and Utah.

Note 2. TDS is competing directly against AT&T, Comcast, Consolidated Communications and Lumen in the territory it serves.

While TDS in a press release pitched the 8-gig product as suitable for power users such as gamers and content creators, an operator representative told Fierce Telecom it doesn’t initially expect significant uptake of the plan.  Instead, such offerings are tools in a marketing war being waged across the broadband industry.

Wire 3 offers a 10-gig service to customers in Florida, and Tennessee’s EPB and also provides a 25-gig service. However, it is not likely that consumers need those kinds of speeds currently.

On TDS’s Q3 2022 earnings call, TDS CFO Michelle Brukwicki stated its 1-gig and 2-gig plans are “important tools that will allow us to defend and win new customers.” She added nearly a quarter of new customers are taking its 1-gig service where it is available and its faster, higher-APRU tiers helped it boost residential broadband revenue in the quarter. However, TDS expects to miss 2022 fiber build target.



Comcast to roll out DOCSIS 4.0 and Multi-Gig speeds in 2023; Fiber (not FWA) is the real competitor

Comcast is on a path to deliver 10Gbps connectivity.  Speaking at a Bank of America investor conference on September 8th, Comcast EVP and Deputy CFO and Treasurer Jason Armstrong said the cable network operator will be in the market with DOCSIS 4.0 and offering symmetrical multi-gig broadband in the second half of 2023.  Currently, upload speeds top out at 200 Mbps.

Armstrong said:  “Comcast fiber connectivity has gone from 0% to 40% sort of across our footprint in a fairly linear fashion. And in that time frame, we’ve become America’s number one broadband provider, 32 million subs. I would tell you in the last couple of years through the pandemic, we added three million subscribers in an environment where fiber was actually picking up in terms of the presence in the markets that served against us….Fixed wireless access (FWA) is newer, but longer term, fiber is the real long-term competitor. And it always has been. Our view hasn’t changed. It’s a very viable competitor.”

“And longer term, if you think about it, any secular trend out there, whether it’s AR, VR, Metaverse, low latency gaming, the move from linear to streaming, every one of those is — those are bandwidth talks. That’s going to continue to move up usage profiles across the network. Those are all trends that work in our favor.”

Comcast said rollouts of its 2-gig offering are underway in Colorado Springs, Colorado; Augusta, Georgia; and Panama City Beach, Florida. It added the service will be available in a total of 34 markets by the end of 2022 and to more than 50 million locations across the country by the end of 2025.  Comcast already offers speeds of up to 1.2 Gbps across its entire cable network using DOCSIS 3.1 technology and has been rolling out mid-split upgrades over the past several months in preparation for an update to DOCSIS 4.0. Speeds of up to 6 Gbps are already available to certain Xfinity fiber customers.

Elad Nafshi, EVP and Chief Network Officer at Comcast Cable, told Fierce Telecom the faster speeds will be available on any DOCSIS 3.1 modem, meaning no upgrades will be required. Elad noted the company’s recent launch of a Wi-Fi 6E router which will deliver the best user experience.  According to Nafshi, the mid-split upgrades are just one small piece of the work it has put into enabling the new speed tier. He pointed to its deployment of a virtual cable modem termination system (vCMTS) as well as digital nodes and digital optics as critical pieces of the puzzle which also lay the groundwork for its future DOCSIS 4.0 rollout.

“The way we’re delivering the increased upstream speeds is by, for the very first time, launching DOCSIS 3.1 in the upstream. It’s by relying on the Octave platform that enables us to truly optimize the delivery of those greater upstream speeds by leveraging those new upstream frequencies in order to deliver on this product. Extending additional DOCSIS 3.1 channels, which enable us to deliver the 2-gig speeds as well. There’s a lot of firsts coming to market here,” he explained.



Comcast Deploys Advanced Hollowcore Fiber With Faster Speed, Lower Latency

Comcast today announced what is believed to be the first-ever end-to-end deployment of advanced “hollowcore” fiber optics in the world by an Internet Service Provider (ISP). Hollowcore fibers deliver significantly lower latency than traditional fibers and over time will provide critical performance attributes. These fibers will help power Comcast’s network and support the delivery of multigigabit speeds through 10G b/sec.

Unlike traditional fibers, in which laser light travels over a solid glass core, “hollowcore” fibers are empty inside with air-filled channels. Since light travels nearly 50 percent faster through air than glass, data travels about 150 percent faster with up to 33 percent lower latency through “hollowcore” fiber compared to traditional fiber. The faster speed of light can be used to double the reach for latency critical applications or can speed up the transaction rates by around 47 percent.

For the deployment announced today, Comcast worked with hollowcore fiber cable solutions provider, Lumenisity.

“Hollowcore fiber is a leap forward in how we deliver ultra-fast, ultra-low latency and ultra-reliable services to customers,” said Elad Nafshi, EVP & Chief Network Officer at Comcast Cable. “As we continue to develop and deploy technology to deliver 10G, multigigabit performance to tens of millions of homes, hollowcore fiber will help to ensure that the network powering those experiences is among the most advanced and highest performing in the world.”

“The reality is that light travelling through air is about 50% faster than travelling through glass. The data throughput and the latency is greatly improved when you have a hollowcore fiber … The advantage is you can extend your reach at equal performance,” Nafshi said.  Hollowcore fiber, like traditional fiber, can be used in the access, metro or core network, and is compatible with legacy fiber.

Comcast connected two locations in Philadelphia, which enables network engineers to continue to test and observe the performance and physical compatibility of hollowcore fiber in a real-world deployment. This 40-kilometer hybrid deployment of hollowcore and traditional fiber is believed to be the longest in the world by an Internet provider. Comcast successfully tested bidirectional transmission (upstream and downstream traffic traveling on a single fiber), used coherent and direct-detect systems (allowing for forward and backward technology compatibility), and produced traffic rates ranging from 10 gigabits per second (Gbps) to 400 Gbps all simultaneously on a single strand of hollowcore fiber.

“We are proud to be working with Comcast on the next generation hollowcore fiber, which we believe unlocks exciting new potential for connectivity around the world,” said David Parker, Executive Chairman of Lumenisity.

Hollowcore fiber will help to power the next generation of ultra-low latency technologies to support network virtualization, telemedicine, augmented and virtual reality, and other emerging services. Moving forward, Comcast is exploring opportunities to strategically deploy hollowcore fiber in select core- and access-network deployments. From 2017 to 2021, Comcast added more than 50,000 new route miles of fiber to its network and is actively building more fiber into cities and towns across the United States.

Comcast’s ongoing work to expand and evolve its fiber deployments – including this groundbreaking step forward with hollowcore fiber – helps to power Comcast’s ongoing 10G evolution, which will deliver reliable multigigabit upload and download speeds over the connections already installed in tens of millions of homes and businesses.

An illustration of the air-filled channels utilized in hollowcore fiber.
Source: Comcast


Comcast deployed more than 50,000 new route miles of fiber to its network from 2017 to 2021. The operator isn’t revealing how or when it might commercialize its use of hollowcore fiber, but the operator sees it playing a role for certain apps and use cases, such as telemedicine, AR/VR and network virtualization.

The operator might also use the technology to target new customer segments that are seeking greater throughputs and lower latencies.

From a broader standpoint, hollowfiber could provide a conduit for “10G,” an industry initiative focused on delivering symmetrical 10Gbit/s speeds, low latencies and enhanced security over fiber-to-the-premises (FTTP), hybrid fiber/coax (HFC) and wireless networks.

Citing its 40km connection in Philadelphia, Comcast is billing this as the world’s longest ISP deployment of hollowcore fiber so far.

But Comcast isn’t the only major operator working closely with Lumenisity. Last year, the startup announced BT was trialing its new optical fiber technology at its labs in Adastral Park, Ipswich. That trial involved a 10km-long hollowcore fiber from Lumenisity.

Lumenisity was spun out of the Optoelectronics Research Centre at the University of Southampton in 2017, with an aim to commercialize the development of hollowcore fiber.

In 2020, the startup closed a £7.5 million ($9.77 million) funding round from a group of investors that included BGF and Parkwalk Advisors and existing industrial strategic investors. Lumenisity has raised £12.5 million (US$16.28 million), according to Crunchbase.

Some key application areas Lumenisity has identified for its technology include financial, data center connectivity and connectivity for the separation of remote radio units and baseband units in 5G networks.

About Comcast Corporation:
Comcast Corporation (Nasdaq: CMCSA) is a global media and technology company that connects people to moments that matter. We are principally focused on broadband, aggregation, and streaming with 57 million customer relationships across the United States and Europe. We deliver broadband, wireless, and video through our Xfinity, Comcast Business, and Sky brands; create, distribute, and stream leading entertainment, sports, and news through Universal Filmed Entertainment Group, Universal Studio Group, Sky Studios, the NBC and Telemundo broadcast networks, multiple cable networks, Peacock, NBCUniversal News Group, NBC Sports, Sky News, and Sky Sports; and provide memorable experiences at Universal Parks and Resorts in the United States and Asia. Visit for more information.

Media Contact:
David McGuire 215-422-2732
[email protected]

About Luminosity:

Lumenisity® Limited was formed in early 2017 as a spin-out from the world-renowned Optoelectronics Research Centre (ORC) at the University of Southampton (UK) to commercialize breakthroughs in the development of hollowcore optical fibre. We have built a team of industry leaders and experts to realise our goal to be the world’s premier high-performance Hollowcore fibre optic cable solutions provider, offering customers reliable, deployable, low latency and high bandwidth connections that unlock new capabilities in communication networks.

Lumenisity is well funded by a consortium of industrial and private investors. We recently relocated our headquarters to Romsey, UK after a substantial investment was made in developing a state of the art manufacturing and testing facility. Our vision is to be the world’s premier high-performance hollowcore fibre optic cable solutions provider offering our customers reliable, deployable, low latency and high bandwidth connections that unlock new capabilities in communication networks.


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Cox Communications is the latest U.S. cable operator to formally announce a commitment to “10G,” the cable industry’s initiative focused on delivering symmetrical 10-Gig speeds over multiple types of access networks, including hybrid fiber/coax (HFC), fiber-to-the-premises (FTTP) and fixed wireless.  Comcast is definitely on board that train, an executive told this author. Both Comcast and Charter Communications have announced lab tests of DOCSIS 4.0, and CableOne formed a partnership to pursue FTTP deployments and is preparing for DOCSIS 4.0 upgrades as it begins to boost the capacity of its HFC networks to 1.8GHz.

Cox estimates it has invested more than $19 billion in network and product upgrades over the past decade.   The company promises to deliver on their 10G plan through a mix of upgrades to DOCSIS 4.0 on HFC and deployments of FTTP. The company has previously made some FTTP headway under a “Gigablast” initiative focused on extending 1-Gig capabilities across the bulk of its footprint.  The privately held network operator said it will make a “multibillion-dollar annual infrastructure investment over the next several years to build a 10-Gigabit-capable, fiber-based network.”

“Connectivity is at the heart of everything we do. With new applications of technology from virtual reality classrooms to autonomous vehicles to the metaverse, people will require increased bandwidth to power their digital futures,” said Mark Greatrex, president of Cox Communications. “Included in this investment is our commitment to bring robust and reliable services to underserved communities and to be the internet provider customers count on to make those valuable connections a reality,” he added.

In addition to faster speeds, Cox also continues to provide secure and reliable WiFi connections covering the whole home. Cox’s Panoramic WiFi offers the latest gateway technology to deliver the most advanced experience with reliable speed, coverage, control and security that can be easily updated as technology changes. Customers also have personal control and security through the Panoramic WiFi app with Advanced Security, protecting every device connected to their network.

“Our intent is to remind the market that we are going to continue to aggressively invest in the communities we serve to maintain and build highly competitive networks,” a Cox spokesman wrote in an email to Telecompetitor.

Multiple Upgrade Paths are Possible:

A typical upgrade involves deploying XGS-PON equipment on the same infrastructure that supports widely deployed GPON technology.  A key question for cable companies is whether to invest in DOCSIS 4.0 and in augmenting HFC infrastructure to obtain speeds that might reach 6 Gbps symmetrically, or whether it would be more prudent to deploy XGS-PON. All the major cable companies – including Cox – seem to be wrestling with that issue.  XGS-PON can support speeds approaching 10 Gbps in both directions.


Supporting multi-gigabit symmetrical speeds is challenging for cable companies’ traditional hybrid fiber coax (HFC) infrastructure. Although the cable industry’s DOCSIS 3.1 and DOCSIS 4.0 specifications call for speeds up to 10 Gbps downstream, upstream bandwidth is more limited.  DOCSIS 3.1 and DOCSIS 4.0 are just part of the CableLabs 10G initiative which  aims to enable cable companies to support multi-gigabit speeds. Maximizing symmetrical speeds – and the number of customers who can obtain those speeds – will require other network upgrades, such as taking fiber closer to the customer and/or splitting nodes and moving to a DAA approach to reduce the number of customers served from each node.

It appears that not all cable operators will pursue DOCSIS 4.0 aggressively. Altice USA, as one example, announced this week it will accelerate its deployment of FTTP upgrades in both its Optimum and more rural-facing Suddenlink footprints. In Europe, Liberty Global will take multiple upgrade paths using both FTTP and HFC/DOCSIS 4.0, but building fiber overlays is the primary focus at Virgin O2 in the UK, Virgin Media (Ireland) and Telenet (Belgium).


As a private company, Cox Communications does not publicize financial data, but the company has in the neighborhood of 6 million residential broadband customers, and nearly 7 million when business customers are included. A company official told Light Reading that Cox continues to grow total customers, with nearly all new customers taking broadband.

The Cox multi-gigabit press release references a “fiber-based network to more than 100,000 homes and businesses in communities near [the company’s] existing footprint.”  In doing this, Cox said it expects to leverage federal funding opportunities – a potential reference to the BEAD program created in the infrastructure act adopted late last year, although the spokesman declined to confirm that.

Cox declined to say what percentage of its network will head down the road of D4.0 or all-fiber, but did note that its current investment commitment includes bringing broadband to underserved communities. Cox came away with a small piece of the first phase of the Rural Digital Opportunity Fund (RDOF) auction – about $6.63 million for 8,212 locations in nine states. The company said it hopes to partner with local cities and towns in pursuing these funding opportunities, but here, too, the spokesman declined to provide specifics.

This won’t be the first time Cox has pursued rural broadband opportunities. The company won funding in the 2020 Rural Digital Opportunity Fund to cover some of the costs of deploying fiber broadband in unserved rural areas, and the company received final authorization of that win in December.

About Cox Communications:

Cox Communications is committed to creating meaningful moments of human connection through technology. The largest private broadband company in America, we proudly serve nearly seven million homes and businesses across 18 states. We’re dedicated to empowering others to build a better future and celebrate diverse products, people, suppliers, communities and the characteristics that make each one unique. Cox Communications is the largest division of Cox Enterprises, a family-owned business founded in 1898 by Governor James M. Cox.



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