User guide

12. Select Impax Permit Action and click Apply. Click Close.
13. In the Impax Server Policy Properties dialog, scroll down and verify that you see the Time Synch
policy. Click OK.
Synchronizing a Windows 2003 server to an external time source
Synchronize the Windows 2003 servers on your network to an external time source to ensure that
image data streaming operates correctly.
CAUTION!
Serious problems might occur if you modify the registry incorrectly. These problems might
require that you reinstall your operation system and there is no guarantee that these problems
can be solved.We recommend that you back up the registry before you change it, so that
you can back out of the changes if necessary.
To synchronize a Windows 2003 server to an external time source
1. To open Registry Editor, select Start > Run, type regedit, and click OK.
2. To change the synchronization server to NTP, in the
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters\Type
subkey, change the REG_SZ value from NT5DS to NTP.
3. To specify if the local machine is a local time server, in the
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config\AnnounceFlags
subkey, change the REG_DWORD value to 5.
4. To enable the NTPServer, in the
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\
NtpServer\Enabled subkey, change the REG_DWORD value to 1.
5. To specify where the computer obtains time stamps, in the
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters\
NtpServer subkey, enter the list of DNS names or IP addresses.
If you use DNS names, append ,0x1 to the end of each DNS name.
6. To set the poll interval, in the
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\
NtpClient\SpecialPollInterval subkey, change the REG_DWORD value to the number of seconds
between each poll.
The recommended value is 900 Base Decimal, which polls the time server every 15 minutes.
7. To specify the maximum positive difference that triggers a synchronization, in the
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config\
MaxPosPhaseCorrection subkey, change the REG_DWORD value to the maximum number of
seconds.
The recommended value is 3600 Base Decimal.
8. Similarly, to specify the maximum negative difference that triggers a synchronization, in the
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config\
MaxNegPhaseCorrection subkey, change the REG_DWORD value to the maximum number of
seconds.
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