Excentis staff members regularly write on technical and less technical topics in our different business areas. We hope you will find some useful gems of information here. If you have any suggestions we love to hear from you on blog@excentis.com.

Happy reading!

While working with DOCSIS systems it is important to understand the upstream periodic ranging process. Ranging can be seen as the DOCSIS heartbeat between Cable Modem (CM) and Cable Modem Termination System (CMTS). As many people tend to struggle with the details of this process, the goal of this article is to visualize the periodic ranging process. Lets take a closer look at that ranging process – and let’s try to understand where things can go wrong during this DOCSIS heartbeat.
If you ask cable people for the differences between DOCSIS and EuroDOCSIS, the only thing they can typically think of is the difference in downstream channel width: 6 MHz for DOCSIS, 8 MHz for EuroDOCSIS. In reality there’s a lot more to it, as we will discuss in this blog post!
The CM-STATUS feature is of significant value in DOCSIS 3.x networks. However, originally it was designed in a way it was not 100% reliable. A specification addition in March 2014 changed this messaging facility and it was further fine-tuned in August 2014. This blog post provides an overview on why and how.
DOCSIS 3.1 uses OFDM(A); this blog explains the basics of multiplexing, modulation and multiple access used with this new technology.