Advanced Troubleshooting Archives

5 07, 2012

Subscribers get lower data rates than provisioned?

Mia Colabrese2020-06-09T09:36:58-04:00July 5th, 2012|

Why do my DOCSIS subscribers and their Cable Modems get lower speeds than what my DOCSIS config file says they should get? This is a common question that I am asked and it has more than one answer. All too often the RF plant is the first to blame for low DOCSIS cable modem speeds, but in many cases the root cause of the problem can be traced back to the cable modem configuration file and/or the lack of appropriate speed test applications in the headend. Also, some

15 05, 2012

SCTE DOCSIS 3.0 Presentation Blacksburg, VA

Mia Colabrese2012-05-15T09:30:18-04:00May 15th, 2012|

DOCSIS 3.0 Troubleshooting, SCTE Blacksburg, VA View more presentations from The Volpe Firm, Inc.

10 04, 2012

See Us – May 15th in Blacksburg, Virginia

Mia Colabrese2012-04-10T15:28:42-04:00April 10th, 2012|

See Brady Volpe at the Great Valleys Meeting Group May 15th, in Blacksburg, VA to discuss DOCSIS 3.0 Troubleshooting, Implementation and Planning. Great Valleys Meeting Group is a SCTE Chapter - serving Central, Southwest Virginia and Edinburg. Our meeting location will be the Holiday Inn in Blacksburg. The Holiday Inn in Blacksburg is offering an SCTE discount. When you reserve the room use the code CTE

26 01, 2012

Advanced Troubleshooting in a DOCSIS 3.0 Plant

Mia Colabrese2020-07-02T17:55:04-04:00January 26th, 2012|

If you missed the SCTE Cable-Tec 2011, I am making available my presentation and white paper on Advanced Troubleshooting in a DOCSIS 3.0 Plant. Each speaker had only 20 minutes to cover topics that could easily last hours, so the presentations are understandably brief. Below you will find my presentation in "Slideshare" for online viewing as well as a fully downloadable PowerPoint version. The PowerPoint version also has reader notes attached at the bottom of each slide which you may find useful. In addition, the animations work a little better in the downloadable version.

20 01, 2012

SCTE Chapter Presentations

Mia Colabrese2012-01-20T12:59:39-05:00January 20th, 2012|

The following presentation was delivered to the SCTE Piedmont Chapter on January 18th. DOCSIS 3.0 Piedmont SCTE Chapter January 18th View more presentations from volpefirm.

14 11, 2011

Press Release

Mia Colabrese2011-11-14T07:00:04-05:00November 14th, 2011|

Press Release The Volpe Firm offering solutions, services and products for the broadband telecommunications industry The Volpe Firm gets Seal of Approval from Clients Alpharetta, GA November 14, 2011: The Volpe Firm offers solutions, services and products for the broadband communications industry with a focus in DOCSIS, data, video, and VoIP communications. We provide everything from specialized DOCSIS 3.0 seminars and or tailored DOCSIS training to high level hardware architecture engineering design and system troubleshooting. The Volpe Firm, with 30 years of combined telecommunications experience, specializes in DOCSIS,

11 11, 2011

SCTE Cable Tec Expo – Atlanta 2011

Mia Colabrese2011-11-11T10:30:44-05:00November 11th, 2011|

SCTE Cable Tec Expo - Atlanta [list type="list2"] Advanced Troubleshooting in a DOCSIS 3.0 Plant Mon, November 14 – Thu, November 17 Presentation Workshop is Wednesday, November 16, 8:00am – 9:30am Repeated November 16, 11:00am - 12:00pm [/list]

5 09, 2011

Top 10 DOCSIS 3.0 Terms You Need to Know

Mia Colabrese2021-08-17T13:31:08-04:00September 5th, 2011|

This is the speak you need to know when talking DOCSIS 3.0 to any DOCSIS Engineer or specialist. It is important that you learn the full name, in many cases the acronym and also what value the particular terminology plays in a DOCSIS 3.0 network as it will likely be crucial in troubleshooting tough-to-diagnose DOCSIS impairments.

31 07, 2011

IPv6 and PC Provisioning in a DOCSIS Network

Mia Colabrese2021-08-18T10:01:08-04:00July 31st, 2011|

With IPv6 on the way in a number of MSO (Multi-System Operator) networks, I have received numerous questions lately about how home devices such as routers and PCs attached to DOCSIS cable modems will get their IP addresses. Will cable operators suddenly start issuing IPv6 IP addresses to their customers? Will you as a subscriber need to upgrade your equipment to support IPv6? Or does the cable modem act as a Network Address Translation (NAT) device and hand-out IP address to each device attached to it? These are some very good questions and the answers are addressed in the DOCSIS specification as I will outline.

5 09, 2010

DOCSIS 3.0 Tutorial – DOCSIS Does IPv6

Mia Colabrese2021-11-24T09:23:28-05:00September 5th, 2010|

Everyone is familiar with Internet Protocol version 4 (IPv4) addresses. You probably even set them up in your home network, such as 192.168.1.1 IPv4 is described in IETF publication RFC 791 (September 1981), which replaced the previous version RFC 760, dating back to January 1980. So its safe to say that IPv4 has been around for some time and serving us quite well. New in DOCSIS 3.0 has support for IPv6. Why do we need this new version? IPv6 has a vastly larger address space than IPv4. This results from the use of a 128-bit address, whereas IPv4 uses only 32 bits. Believe it or not, major cable operators are running out IP address. This is due to more customers, not just for cable modems, but also for set top boxes and VoIP eMTAs. Further, deployed in cable networks are IP devices such as power supplies with embedded cable modems for monitoring voltage, temperature, current and more. All networks are getting more IP devices requiring more and more IP addresses, so the 2128 addresses allocated in IPv4 are no longer sufficient and we turn to the 3.4×1038 addresses provided in IPv6.