Suggesting the strength and flexibility of the human vertebrae and the central nervous system that they enclose, telecommunications professionals have long used the term "backbone" to describe that part of the network that carries the most traffic and connects all local area networks. The cable pioneers who founded this industry certainly displayed lots of another kind of metaphorical "backbone"—guts, persistence, tenacity—but it was only in the 1990s, with the advent of high-speed data and waves of industry consolidation, that the cable equivalent of the telecom backbone emerged. Geographic extent and product portfolios continue to drive the definition of wide area networks that link an MSO’s systems and market areas. As Comcast VP of Network and Transport Engineering John Leddy reminds us in his interview, his company is in 35 states, plus D.C. But it’s not just Comcast. MediaCom Communications VP of IP Networks Joe Selvage, co-author of the lead article in this section, manages two backbone networks (northern and southern) that encompass ten states between them. As for services, high-speed data was arguably the initial driver in the build-out of cable’s regional and national backbones. But services have proliferated. Selvage tells us that across MediaCom’s converged IP/GigE/DWDM backbones run the following: VoIP, HSD, VOD, standard and high-def digital video, internal IT traffic, and enterprise services. That’s not an atypical mix. Supporting this kind of a portfolio, however, has required the cable industry to lean upon innovations in both the networking and the optical arenas (such as those outlined by OpVista CTO Winston Way in his sidebar). Insofar as cable is going where no previous telecom backbones have yet ventured, the industry also has needed to break new ground with vendors. That would explain, for instance, Comcast’s Open Transport Initiative, a noteworthy project that is likely to shape the next stage in cable’s evolving backbone networks.—CT

The Daily


FCC Chair Tees Up Apartment Broadband Competition Item

Cable has to contend with FCC Chair Jessica Rosenworcel circulating a proposal that would prevent providers from entering into exclusive revenue sharing agreements with building owners as part of changes aimed at bringing competition to MTEs.

Read the Full Issue
The Skinny is delivered on Tuesday and focuses on the cable profession. You'll stay in the know on the headlines, topics and special issues you value most. Sign Up


Jan 28
Cablefax 100 – 2022 Nominations Due: January 28, 2022
Mar 11
The FAXIES 2022Entry Deadline: March 11
Apr 1
Cablefax Top Ops – 2022Nominations Due: April 1, 2022
Jun 3
The Diversity List – 2022Nomination Deadline: June 3
Aug 12
Most Powerful Women – 2022Nominations Due: August 12
Full Calendar


Seeking an INDUSTRY JOB?

Hiring? In conjunction with our sister brand, Cynopsis, we are offering hiring managers a deep pool of media-savvy, skilled candidates at a range of experience levels and sectors, The result will be an even more robust industry job board, to help both employers and job seekers.

Contact for more information.