DOCSIS 4.0 Certification Available

Promoting interoperability, supporting operator deployment, and facilitating enhanced services for customers

10G Technology

DOCSIS® 4.0 Technology

DOCSIS 4.0 technology enables the next generation of broadband over cable’s hybrid fiber coax (HFC) networks, delivering symmetrical multi-gigabit speeds while supporting high reliability, high security and low latency.

Highlights Initial cable broadband technology, high speed internet access Added voice over IP service, gaming, streaming Higher upstream speed, capacity for symmetric services Greatly enhances capacity, channel bonding, IPv6 Capacity and efficiency progression, OFDM, wideband channel Symmetrical streaming and increased upload speeds
Downstream Capacity 40 Mbps 40 Mbps 40 Mbps 1 Gbps 10 Gbps 10 Gbps
Upstream Capacity 10 Mbps 10 Mbps 30 Mbps 200 Mbps 1-2 Gbps 6 Gbps
First Specification Issue Date 1996 1999 2001 2006 2013 2019


The performance numbers above are based on specifications; deployed network performance will vary across implementations.


What is the difference between DOCSIS 3.1 specifications and 4.0 specifications?

The difference in specifications is an increase in upstream capacity and more options for operators to increase downstream capacities. Current DOCSIS 3.1 cable modems support capacities up to 5 Gbps downstream and 1.5 Gbps upstream. DOCSIS 4.0 cable modems will support capacities up to 10 Gbps downstream and 6 Gbps upstream.

How did CableLabs and the industry cooperate to develop DOCSIS 4.0?

In June 2016, FDX technology transitioned from an innovation project to an industry-wide R&D effort led by CableLabs. It was originally introduced in the DOCSIS 3.1 suite of specifications. CableLabs moved FDX requirements from DOCSIS 3.1 to DOCSIS 4.0 specifications in August 2019. Vendors and member cable operators of CableLabs continue to collaborate on further developing DOCSIS 4.0 to include Extended Spectrum DOCSIS (up to 1.8 GHz).

Where can I find DOCSIS 3.1 technology resources?

DOCSIS 3.1 information and resources can be found in its new home URL:

How does DOCSIS 4.0 technology contribute to 10G?

DOCSIS 4.0 technology is a major step toward reaching the industry’s 10G goal. With full duplex and extended spectrum capabilities integrated into next-generation DOCSIS 4.0 technology, the industry will be able to deliver on that 10 Gbps promise over hybrid fiber coax networks. Learn more about the road to 10G and its technologies.