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Broadband Direct

Daily news and top headlines for broadband communications engineering and design professionals

Evaluating upstream modulation techniques

September 30, 1998 8:00 pm | by Jeyhan Karaoguz, Ph.D., Principal Staff Engineer, Research and Advanced Development, Internet and Networking Group, Motorola. | Comments

The North American cable industry's adoption of the Data-Over-Cable Service Interface Specification (DOCSIS) is solving long-standing problems of interoperability. But while this offers the cable industry the promise of lowered costs and good reliability, it presents only a partial solution to the vexing problem of interference on the upstream link between subscriber and headend.


Pass the buck and point the finger

September 30, 1998 8:00 pm | by Jeffrey Krauss, Finger Pointer-in-Chief and President of Telecommunications and Technology Policy | Comments

Digital television will get here soon, but the broadcasters, TV manufacturers and movie-makers are squabbling with each other over various last-minute details. This squabbling could blossom into huge battles that delay the deployment of digital television, or they could be settled quickly. While new disputes seem to arise every month, this month's hot topics are copy protection, V-chip content ...

Who killed DTV?

September 30, 1998 8:00 pm | by Roger Brown, Editor | Comments

Let the finger-pointing officially begin. The long-awaited transition to digital television is running into snags. Given its complexity, that probably doesn't come as a surprise to most engineers. But for politicians and others, it's shaping up to be a public embarrassment. With digital TV scheduled to go live in November, you can be sure that if there are delays, regulators will come looking f...


Morphing to a software-centric future

September 30, 1998 8:00 pm | by Craig Kuhl, Contributing Editor. | Comments

The morphing of the cable industry from its traditional hardware-centric mentality to a more complex and puzzling software-centric bent is affecting even the most pro-active cable operators, and with them, a whole generation of vendors who are scrambling to find the ideal network management and application software solutions.

Putting the right pieces in place

September 30, 1998 8:00 pm | by John Mattson, Manager, Product Marketing, Broadband Networks; and Jim Forster, Distinguished Engineer, Cisco Systems Inc. | Comments

Cable operators and their affiliates building broadband cable modem networks are experiencing exceptional demand growth. This expansion in subscribers and services is projected to accelerate through the remainder of 1998 and 1999, and is a major reason for the growing market value of most players within the cable industry.

Will new content push HFC's limit?

August 31, 1998 8:00 pm | by Fred Dawson, Contributing Editor | Comments

The cable industry will soon be confronted with a paradigm shift in interactive television that could drastically affect how operators design their networks and even how they make money. In a nutshell, the new challenge arises from the fact that, contrary to previous assumptions, consumers are likely to have a wide range of sources to choose from for access to long-form, on-demand television vi...


Must-carry, Firewire and PSIP

August 31, 1998 8:00 pm | by Jeffrey Krauss, Must-Carry Maven and President of Telecommunications and Technology Policy | Comments

The FCC has proposed seven alternatives for must-carry policies during the transition from today's analog broadcasting to digital broadcasting. These range from requiring cable systems to start carrying all digital TV broadcasts as soon as they begin, to not requiring any digital carriage until all analog broadcasts have terminated, and a variety of intermediate alternatives.

Falling, with style

August 31, 1998 8:00 pm | by Roger Brown, Editor in Chief | Comments

Already, the local telephone marketplace is experiencing consolidation frenzy, with SBC Communications, Bell Atlantic (and maybe) US West seemingly poised to control the country's local connections. Long distance carriers AT&T and MCI are either making acquisitions or are being acquired as well. AT&T, of course, announced its intention to buy Tele-Communications Inc.


Squeezing Cadillac services into economy plant

August 31, 1998 8:00 pm | by Don Sipes, Vice President of Technology, Transmission Network Systems, Scientific-Atlanta | Comments

Cable services that once were considered futuristic, such as interactive video-on-demand, fast Internet access and IP telephony, are quickly becoming today's reality, and their rapid rise is placing increasing demands on the hybrid fiber/coax (HFC) networks that provide them. Today's advanced networks must provide for reliable two-way communications, scalability to support ever-increasing amoun...


Pushing fiber deeper in HFC networks

August 31, 1998 8:00 pm | by Dr. Lawrence A. Stark, VP Strategic Marketing; and Bill Moore, VP and General Manager for Broadband Communications | Comments

If you are a cable TV system engineer, you can't be blamed for feeling just a little bit smug these days. It wasn't that long ago that everywhere you looked, national publications such as Forbes, Wired, The Wall Street Journal, etc. were pushing and shoving to be the first to hang the cable industry out to dry.


Implementing DWDM-based networks

August 31, 1998 8:00 pm | by Esteban Sandino, Manager of Advanced Network Technologies; and James W. Neil, Project Engineer, TCI Communications Inc. | Comments

Dense wavelength division multiplexing (DWDM) has emerged as a practical alternative for implementation of HFC networks. The basic principle involves the transmission of multiple wavelengths over a single fiber strand to individual fiber hubs. These wavelengths are selected from the 1550 nm optical transmission grid as defined in the ITU wavelength standard.


Details of the FCC's Navigation Devices decision

July 31, 1998 8:00 pm | by Jeffrey Krauss, Set-top Box Navigator and President of Telecommunications and Technology Policy | Comments

Cable subscribers will be allowed to buy and own their own cable boxes, and connect them to the cable network. An interface being worked out by CableLabs will allow the operator-supplied security element to be separated from the customer-owned digital set-top box. One surprise is that after 2005, this security interface is mandatory; cable operators will not be allowed to provide boxes with emb...


Potential merger impacts

July 31, 1998 8:00 pm | by Roger Brown, Editor in Chief | Comments

For example, I still wonder how the two cultures will co-exist. Can AT&T shed its monopolistic legacy and actually become a communications company that thrives in a competitive world? Clearly, the company's leaders recognize that it must make that transition, but it's easier said than done. And what about Cable Television Laboratories? It counts on TCI for about $2.

Taking a close look

July 31, 1998 8:00 pm | by Fred Dawson, Contributing Editor | Comments

AT&T's decision to purchase Tele-Communications Inc. no doubt will add clout to the cable industry's efforts to drive HFC technology development, but it remains to be seen whether the deal becomes a force for cohesion or upheaval as the industry pursues deployment of advanced services. The two-sided nature of the potential impact the AT&T/TCI deal might have on the cable industry was la...



July 31, 1998 8:00 pm | by Dana Cervenka, Managing Editor | Comments

Ready or not, here it comes. Broadcasters will begin transmitting some high definition television programming late this fall, and have announced their chosen HD formats: NBC and CBS have committed to 1080i, while ABC and Fox have opted to use 720p. Given that cable operators reach about 67 percent of all TV households in the U.


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