Community Broadband Networks 
  corner   
Home
Archives
RSS/XML
Recent Blog Headlines
About Al Bonnyman
"What's this blog thing about, anyway?"
Partial list: power utilities with fiber

Sponsored by:
Fiber Planners Inc.
Designers of fiber networks for electric utilities and communities.

News and comments on community broadband networks, the communities deploying them and the technologies that support them. Published by Denise Frey and Al Bonnyman.

Enter your email address below to subscribe to Community Broadband Networks:

powered by Bloglet
If the subscription form returns an error, send an e-mail to bonnyman@earthlink.net.

Index of 2100 previous posts since March 2003

PicoSearch
  Search help

Send news updates and feedback to:
Al Bonnyman

Sponsored by:

Fiber Planners logo


Some of the topics we cover:

  • ADSS cable technology
  • OPGW cable technology
  • Fiber to the home
  • Powerline broadband
  • Fixed wireless broadband
  • Other power utility telecom topics
  • Innovative fiber deployment technologies


Recent headlines:


Links to other blogs and free-form news sites:


Other links:


Note: comments posted are strictly the opinion of the poster and not necessarily those of Fiber Planners Inc. or any other posters.

 

Monday, January 05, 2004

 

Telkonet deploys test system onboard U.S. Naval Research Vessel

Power line communications vendor Telkonet is providing power line broadband equipment for the Office of Naval Research's test vessel, "Afloat Lab" (also known as "Starfish"). ONR wants to test BPL (broadband over power line) technology for potential use on Navy ships in the future. As Telkonet's press release notes, the advantages of using existing electrical wiring are especially compelling in a naval shipboard environment where installing new cable can be especially expensive.

This test is relevant to potential utility BPL users.

Normally, news of either a military test of broadband technology or a Telkonet sale would be off-topic for this blog. The military's communications needs, while fascinating, can be very exotic and not necessarily germane to the challenges of building local broadband networks. Likewise, Telkonet's products are oriented more to LAN applications within an enterprise (a home or a business) than to power utility use.

This test, however, should be interesting for several reasons. First, naval shipboard electrical systems are much noisier and hostile to electronics than a utility's power grid. As the electrical officer on nuclear submarine during the Cold War, I saw large voltage spikes and frequency fluctuations during the almost daily emergency drills we ran every day. The off-the-shelf personal computer we had purchased ashore blew its' power supply almost weekly. Only Mil-Spec (military hardened) equipment survived this environment.

Second, the Navy remains dependent on VLF (very low frequency), LF (low frequency) and HF (high frequency) radio circuits as back-ups for over-the-horizon communications when satellites are unavailable. The Navy is likely to be very sensitive to any EMI (electromagnetic interference) from shipboard interior communications systems.

Finally, there are times when surface ships need to go totally silent from an emissions standpoint without shutting down interior communications. Telkonet will have to pass this hurdle as well.

I see these ONR tests as an acid test of two critical BPL issues in general -- robustness and interference. (A third issue -- communications around transformers -- won't get much of a workout here since U.S. naval electrical systems operate at 440 volts and lower; North American power utility medium voltage distribution systems operate in the 7,000 to 35,000 volt range.)

#





Add email subscriptions to your blog with Bloglet! Weblog Commenting by HaloScan.com Listed on Blogwise
The Octopus Files
My Popdex Game Profile
Popdex
Metapop
Technorati Profile Creative Commons License
This work is licensed under a Creative Commons License.

This page is powered by Blogger.