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The control plane of a routing device is the term for the set of functions that handles incoming traffic that doesn't get forwarded by the forwarding plane. The control plane comprises e.g. device management, routing protocols and security mechanisms. Control Plane Policy (CoPP) testing typically...
Cable operators all around the world are working hard to provide their customers with high speed data services by making use of (Euro)DOCSIS® 3.0 technology. An important problem however is that as of today none of the available CMTS solutions are EuroDOCSIS™ 3.0 Qualified. As an operator you want...
eurodocsis-rf.jpg With over 15 years of experience as the official certification test lab for the European cable market, we tested many hundreds of products for specification compliance. Running ATP tests and troubleshooting issues is our core business, and we are experts in it. What do you want to...
Experts in testing DOCSIS ® products Reliable partner with proven track record. We're the no. 1 independent test lab for DOCSIS ® & PacketCable™ technology, best known for our thoroughness in EuroDOCSIS™ and EuroPacketCable™ certification testing. Highly qualified test engineers with in depth...
Excentis also offers large scale CMTS testing. We have a setup in use with more than 500 Cable Modems to verify the stability and performance of your CMTS, also long term (order of weeks). The configuration options are countless, here are some examples: All Cable Modems are connected to ByteBlower...
DOCSIS 3.1 uses OFDM(A); this blog explains the basics of multiplexing, modulation and multiple access used with this new technology.
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.
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!
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.
Nothing is perfect. We all know this, and we have to live with it. However, trying to improve is a key to success. This is true for cable networks as well. A bad plant condition and interferers may degrade the communication between CM and CMTS. Luckily though there is lot of data that can be monitored to detect quite some issues.