Shoretel phones time is an hour slow

Posted on 2011-10-31
Last Modified: 2012-05-12
I have a shoretel phone system and it seems like the time server ( I have them synced with has switched to daylight savings time an hour early. A co worker and I changed the sntp server to another time server, but the phones are still showing an hour slow. I'm confused by this. Can anyone offer any insight?
Question by:egmtech
    LVL 7

    Accepted Solution

    The problem is with the phones not the time servers. NTP reports in UTC, and does not report any day light savings information. Timezones, and daylight savings is all handled by the phone itself. See if an update to your system is available that fixes it. Around 2007, in many countries (US included) started shifting daylight savings, and so any phone with older firmware will be inaccurate for a week or so in the spring or fall, unless the sysadmin takes active measures to make sure the time is reported correctly (such as temporarily changing timezone, enabling/disabling Daylight savings, etc).

    Also, this is a bit more logical than the National Institute of Standards and Technology ignoring the prevaling standards for daylight savings and doing things early.
    LVL 22

    Expert Comment

    by:Dr. Klahn
    Hellmark is correct.  If DST in the product is set by firmware, and the firmware is out of date, DST will not turn over on the correct date.  The Navy DST web page indicates why this problem can occur.  The problem should resolve itself sometime this week.

    As an interesting side note, products that sync on the WWV or WWVB radio signals such as the so-called "atomic clocks" do not have this problem.  A bit is transmitted in the time signal that indicates whether DST is in effect, so those products are always correct.

    Author Closing Comment

    Ok, great, thanks for the info. I will look at that tomorrow. That actually makes perfect, logical sense. No surprise it flew past me undetected. Again, thanks to both of you.
    LVL 7

    Expert Comment

    You're welcome, and glad could help you. And don't worry, you're not the only one who has been caught by this. Plus since it is only out of sync for a week or two, it is easy to not notice it happening for years.

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