PNM Archives | Page 2 of 3 |

Advancing the Echo-System

By Stewart Schley — Larry Wolcott’s perfect day goes like this: Summer morning. Brilliant Colorado sky. Birds chirping. And Wolcott in a trench, splicing cable. “That,” he says, “is what I love.”

An Introduction to PNM

By Ron Hranac — Linear distortions—micro-reflections, amplitude ripple/tilt, and group delay distortion—wreak havoc upon the digital signals carried in our cable networks.

By Alberto Campos — Cable has enjoyed advances in HFC network troubleshooting leveraging proactive network maintenance tools. PNM uses the intelligence of transport devices like the cable modem (CM) and the cable modem termination system (CMTS) for network maintenance purposes.

PNM and Associated Standards

By Chris Bastian — Network architectures and operations have become more complex in the past few decades. When I began working in telecommunications in the mid-1980s, telecom networks were still using circuit switches such as the 5ESS and DMS-100.

PNM: State-of-The-Art and 2019 Roadmap

By Larry Wolcott — I was recently sorting through some old notebooks and stumbled across a few pages that were dated 2009. The drawings and formulas were the early conception of our PNM (proactive network maintenance) signature matching algorithm.

PNM at CableLabs®

By Jason Rupe — CableLabs went into high gear with proactive network maintenance (PNM) not long ago and has big plans for the future of PNM. Success will rely on the cable community’s strong focus on furthering PNM in several directions.

The Business Perspective of Proactive Network Maintenance

By Ed Marchetti — I was surprised when reminded that PNM has been “a thing” for almost 10 years. It seems almost like yesterday when we were seeing this for the first time and wondering about the future of cable maintenance.

Full-Band Capture Takes the Stage

By Jeff Finkelstein — For anyone who has been in cable a long time, for some of us a very long time, we remember how challenging it was to troubleshoot plant impairments in the headend and field. Not just in finding and correcting, but in dealing with the equipment we used in the day.

PNM: More than Pre-Equalization Analysis

By Cyrille Morelle and Winston Chang – When it comes to modern monitoring systems, proactive network maintenance (PNM) and predictive modeling are major parts of the solution to increasing customers’ quality of service and expectations. Advanced cable modems can now provide the information needed for constant monitoring at the customer premises.

PNM: More than Pre-Equalization Analysis

By James Medlock – When you ask cable operators who have not deployed a proactive network maintenance (PNM) solution why, the first response is usually something along the lines of, “we have too many problems to fix already, we don’t have time for any more.”