Sometimes Polycom phones will display the time in Greenwich Mean Time (GMT) instead of the timezone configured. In this case, the Polycom configuration file must be manually updated with the correct time zone.

  1. First check that the time is configured correctly using this article.
  2. Open a new file in notepad, and copy into it the following:

     

    <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
    <!-- Generated sip-interop.cfg Configuration File -->
    <polycomConfig xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="polycomConfig.xsd">
    <sntp
    device.set="1"
    device.sntp.serverName.set="1"
    device.sntp.serverName="pool.ntp.org"
    device.sntp.gmtOffset.set="1"
    device.sntp.gmtOffset="-28800"
    tcpIpApp.sntp.address="pool.ntp.org"
    tcpIpApp.sntp.address.overrideDHCP="1"
    tcpIpApp.sntp.gmtOffset.overrideDHCP="1"
    tcpIpApp.sntp.gmtOffset="-28800"
    />
    </polycomConfig>

     

  3. Now edit the offset at the end of the file to the correct time zone:

    EST= -18000
    CST= -21600
    MST= -25200
    PST= -28800

  4. Save the file as Polycom_GMT_fix.cfg on the same computer you used to access the phone.
  5. Follow the instructions in this article to import the configuration.