DOCSIS Archives

14 12, 2018

Demystifying OOB and R-PHY

Mia Colabrese2020-04-02T12:21:56-04:00December 14th, 2018|

Benefits and Limitations, Choose your R-PHY Wisely In this article we dive into Data-Over-Cable Service Interface Specifications (DOCSIS) remote PHY (R-PHY) testing challenges and how these can be overcome using out-of-band (OOB) channel communications. Test and Measurement Challenges with R-PHY Let’s understand the fundamental challenges with testing in an R-PHY world. Today’s radio frequency (RF) test equipment, such as sweep, return path monitoring, and leakage is based on analog signals. Figure 1 illustrates how typical headend / hub test equipment signals traditionally flow to or from an analog

10 09, 2018

Optimizing the DOCSIS Upstream

Mia Colabrese2018-09-10T08:37:20-04:00September 10th, 2018|

Data-Over-Cable Service Interface Specifications (DOCSIS) version 3.1 offers a host of exciting possibilities and realities for cable operators. I have covered many of these topics in previous articles but the one thing that cannot be overlooked is the basics. It doesn’t matter how great these new technologies are if you do not pay attention to the foundation. It’s not any different than a house. If your foundation isn’t solid who cares if you have the best theater system in it. It can crumble under foot if the foundation

1 06, 2018

It’s All About FEC

Mia Colabrese2018-06-01T08:21:05-04:00June 1st, 2018|

We have all heard the stories of how well DOCSIS 3.1 is working. Perhaps your system has been involved in one of these stories too. One thing is true, DOCSIS 3.1 is working really well — even better than we had anticipated. Here is why DOCSIS 3.1 is working really well — it is all about forward error correction (FEC). [For the purpose of this article we will only discuss error correction in the downstream] Reed Solomon forward error correction (RS-FEC) has been used in all previous generations

20 02, 2018

Full Duplex DOCSIS

Mia Colabrese2020-04-02T12:23:26-04:00February 20th, 2018|

Putting the symmetry in DOCSIS and enabling increased bandwidth and speed. Why does symmetry matter you ask, especially in broadband? Well you have symmetry in fiber. Big deal, right? Yes, now FDX allows for coax to do something that it could never do before, have symmetry just like fiber. So FDX continues the alphabet soup of our industry but through symmetry allows for increased broadband and speed in coax. So let’s take another bite of the alphabet soup together. In my last article I covered remote PHY (R-PHY)

14 02, 2018

There’s an app for that…

Mia Colabrese2018-02-14T13:11:22-05:00February 14th, 2018|

DOCSIS 3.1 has gone from concept to silicon. Proactive Network Maintenance (PNM) is emerging as a staple in the industry, and we are seeing the cable rapidly evolving into an app-driven industry. It’s an exciting time to be in cable! In my last article I mentioned how ‘everything is becoming an app’. This has been mentioned recently in numerous articles. The typical subscriber - maybe even you - really likes the concept of apps. Think of how Netflix has transformed our industry. Netflix is really an app that

4 12, 2017

Remote-PHY and Full Duplex DOCSIS

Mia Colabrese2020-07-01T15:40:40-04:00December 4th, 2017|

Show Me The Money! Remote-PHY and Full Duplex DOCSIS Doesn’t the cable industry just love initialisms and acronyms? Just as you thought you were getting your mind around DOCSIS 3.1 the industry continues to move forward and drop a bunch more terms like remote-PHY (R-PHY) and full duplex (FDX) DOCSIS. I like soup, but we need a decoder ring for the alphabet soup we are eating. Don’t get me wrong, this is great stuff and awesome technology. CableLabs recently updated the DOCSIS 3.1 PHY specification to include FDX.

4 10, 2017

Virtual CCAP in the “hic et nunc”

Mia Colabrese2021-08-16T15:27:48-04:00October 4th, 2017|

Virtual CCAP in the "hic et nunc" No that isn't Klingon Happy Friday Everyone. Today is September 29 and this is episode 31 of Get Your Tech On, our show on All Things DOCSIS with a focus on Virtual CCAP today. I'm Brady Volpe, Founder of The Volpe Firm and Nimble This. With us is, John Downey, the flavor of cable. John is also CMTS Technical Leader at Cisco Systems, welcome John. Special guest Asaf Matatyaou, Vice President, Solutions and Product Management, Cable Edge Business at Harmonic. Who

31 08, 2017

Virtual CMTS-CCAP

Mia Colabrese2020-04-02T09:29:04-04:00August 31st, 2017|

To Boldly Go Where Cable Has Not Gone Before – Virtual CMTS-CCAP By Brady Volpe - As published in Broadband Library Star Trek brought us ideas like cell phones, tablets, Bluetooth, MRIs and MP3s and more My name is not Morpheus and I’m not asking you to choose between a blue or red pill here, but let me start off by saying I started out as a hardware guy in the business. I know hardware, I like hardware but I have converted into being a software dude. My

1 08, 2017

DOCSIS CMTS Suggestions, Best Practices and Recommendations Part 3

Mia Colabrese2021-08-16T15:31:55-04:00August 1st, 2017|

DOCSIS CMTS Suggestions, Best Practices and Recommendations Part 3 Happy Friday Everyone. Today is July 21 and this is episode 30 of Get Your Tech On, our show on All Things DOCSIS. I'm Brady Volpe, Founder of The Volpe Firm and Nimble This. With us is, John Downey, the iron man of cable. John is also CMTS Technical Leader at Cisco Systems, welcome John. Today’s episode is a good one. This is part 3 on our DOCSIS CMTS Suggestions, Best Practices and Recommendations. DOCSIS CMTS Best So the

27 06, 2017

Virtual CCAP – Technology Recap R-PHY, FDX, IPTV and NDF/NDR

Mia Colabrese2021-08-16T15:38:13-04:00June 27th, 2017|

Technology recap R-PHY, FDX, Virtual CCAP, IPTV, NDF/NDR and more Episode 29 “Technology recap R-PHY, FDX, Virtual CCAP, IPTV, NDF/NDR and more" ANGACOM 2017 was very exciting this year with a lot of exciting products and interesting ideas. Remote-PHY, FDX technologies where featured as was a virtual CCAP solution. IPTV was also heavily featured, a new German company debuted it's 10G Ethernet overlay network and an interesting NDF/NDR solution was also displayed. Brady will discuss all the technologies seen and this will build up to feature podcasts where we plan on