What is PoE?

May 18, 2009

Guess #1: Privately owned estate?
Guess#2:  Prince of Egypt?
Guess #3: Edgar Allan’s last name?
Guess #4: Wasn’t she the one who sang “Trigger Happy Jack?

Actually, in the surveillance industry, PoE stands for Power over Ethernet. The concept is quite simple: You plug your Ethernet cable to your camera’s Ethernet port and plug the other end of the cable into a PoE switch, and you get power.   Simple enough right? Not quite. There are other factors you must consider when deploying PoE powered cameras, such as PoE switch types and classifications.

Here is a list of the four power classes:

  • Class 1 –  4.5 watts at PoE port; 3.84 watts at device
  • Class 2 –  7.5 watts at PoE port; 6.49 watts at device
  • Class 3 –  15.4 watts at PoE port; 12.95 watts at device
  • Class 0 –  15.4 watts at PoE port; .44 to 12.95 watts at device
  • Not all PoE powered cameras will work with your switch, so you must consider which class your switch and cameras fall under. Want more information on the classifications, check out this article from IPSecurityWatch.


    What is an RSS Feed?

    March 12, 2009

    The dictionary’s definition…

     

    Main Entry: RSS

    Part of Speech: n

    Definition: any of various XML file formats suitable for disseminating real-time information via subscription on the Internet

    Example: RSS has become a popular technology for bloggers and podcasters to distribute their content.

    Etymology: Rich Site Summary or Really Simple Syndication

    Usage: computing

    Webster’s New Millennium™ Dictionary of English, Preview Edition (v 0.9.7)

    Copyright © 2003-2009 Dictionary.com, LLC

     

    Our definition…

     

    RSS Feed is an internet tool used to deliver regularly changing web content. Many news-related websites, blog sites, and online publishers will have their site content connected to an RSS Feed so that the site’s readers can “subscribe” to their RSS Feed in order to receive notifications anytime that specific site updates or adds information.

     

    FYI: While in the past, the word “subscribe” was known to have a dollar amount attached…when you “subscribe” to a feed, there is no cost involved.

     

    Benefits of using RSS Feed…

     

    -         Allows you to easily access the latest content from the sites you enjoy most

    -         Saves time by delivering the information directly to you rather than you visiting multiple sites to receive information

    -         Helps you secure your privacy more since there isn’t as much of a need to sign up for email newsletters

     

    So…now that you know, feel free to subscribe to our blog via RSS Feed!


    8 Tips on Data Migration from Tech Target

    January 14, 2009

    Here are a few great tips for data migration from Tech Target.

    1. Understand server to storage mapping
    2. Get metrics on usage patterns, network capacity and storage bandwidth so you can plan the migration accordingly
    3. Plan for downtime
    4. Don’t forget about data security and the current security profiles
    5. You can potentially use host based server virtualization to accomplish this task, but use carefully
    6. Thin provisioning might be helpful to accomplish this goal
    7. Details, details, details. Make sure array software versions match up and are compatible before proceeding
    8. Save time for homework and practicing. You will make mistakes, so be prepared and prepare to learn

    Built in tool like synchronous mirroring and campus mirroring in your IP SAN can also make this task easier. Use SAN volumes as a target for your host volumes, copy, and give access to your secondary server. This will have little impact on the primary host (and its associated volume) and give you a clean copy to verify with. Share your tips and tricks in the comments.