After the summer holidays we started working with fresh energy on a brand new large scale test set-up! It’s now fully ready and tested. We’ll share some details and photos in this blog post. The set-up The set-up consists of an RF network with over 500 Cable Modems – using...

Although Wi-Fi operates at different frequencies than the ones used by the DOCSIS system, many interference cases have been observed. Current cable modems typically have an embedded Wi-Fi Access Point and a small form factor, which means that the RF circuitry of the Wi-Fi subsystem and the DOCSIS subsystem are...

Securing the software The DOCSIS specifications define how cable modems must behave. If a cable modem has been tested against these specifications (certified), you can be sure it will behave correctly and securely. Ideally, that certified software is installed at production time and is never changed. The need for bug fixes and...

The first steps in a new technology are always challenging. To control the take off for the upcoming DOCSIS 3.1 (promising a great deal of capacity potential), it helps to supplement the theory with a more practical view on things. You don’t want to launch a pilot or field trial...

Privacy is an integral and important part of DOCSIS because of the shared medium over which it operates (the HFC network). Since version 1.1, the authentication of cable modems is done using a chain of X.509 certificates (PKI infrastructure). This blog post explains the history of the different PKI infrastructures and how it...

Extended upstream power allows 3.0 cable modems to transmit upstream bursts at higher powers than previously established. This feature has been added some time after the introduction of EuroDOCSIS 3.0. But why? Do we need higher powers now than before? Noise is everywhere To operate at its maximum capacity, the...