Welch Allyn Connex CS Central Station & Server - User Manual - Manual (Page 109)

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Time Synchronization
If a facility does not have a time server available, it may be necessary to set up a time
server on the Connex server. Central Stations should be configured to synchronize time
with an authoritative time server.
Setting up an authoritative time server, on Connex server
It is to be noted that changing the time on the authoritative time server will not result in
an immediate update of the time on all clients. There is an “Update Now” button in
Internet Time options (on each client) to force an immediate re-synchronization.
Otherwise the time will be re-synchronized at the next regularly scheduled update time
(as set by the Windows operating system).
To set up an authoritative time server:
1. Determine if NtpServer is already enabled (already a time server)
2. Login as the system administrator. From Start > Search programs and files type cmd
<Enter>. A command line window opens.
3. Enter the following command:


w32tm /query /configuration <Enter>
4. Scroll down the list and look for the following entries:

NtpServer (Local) 
DllName: C:\Windows\system32\w32time.dll (Local) 
Enabled: 0 (Local) 
InputProvider: 0 (Local)
1. Update the registry to turn on the NtpServer functionality. Enter the command:


reg add HKLM\system\CurrentControlSet\Services\W32Time\TimeProviders\
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NtpServer /v Enabled /t REG_DWORD /d 0x1 /f
2. Make sure W32Time is using NTP. Enter the command:
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
reg add HKLM\system\CurrentControlSet\Services\W32Time\

Parameters /v Type /t REG_SZ /d NTP /f
WARNING Prior to making any Windows Registry changes, it is highly
recommended that a back up be made first.
Note Make sure UDP Port 123 is open in windows firewall.
Note The third line here indicates the status of the NtpServer. If '0' this machine is not
configured to be a time server.