Time sync for Domain and Phone system

On the Active Domain Controller you can force it to Sync with an external time source.

For example from a command prompt on the DC


net time "/setsntp:uk.pool.ntp.org"

Not sure of the Nortel BCM 400 but either sync that with the DC or use the same external time source.

if you have a domain logon script, you can sync with the domain time by including the following command (assuming its a batch file)

net time /set

Using that command will configure server to always go out to that server and sync time?  I am in Toronto Canada.

Chris-Dent,

 I have followed these steps... How can I test that it is working?

The non-intrusive way would be to check the event logs for messages from Windows Time.

A more intrusive approach involved changing the time on your DC by a couple of minutes (no more than a couple, i.e. 2, and definitely no more than 5). Then run:

w32tm /resync

Verify that time corrects itself.

You can, in theory, do the same on your phone system. It should pick up the change from your DC.

Chris

I checked the event log first and I am getting this Error.

 

You missed a g off the end of the name :)

ca.pool.ntp.org

Chris

Ok that fixed the server end of things.... My server time is just under one min faster than my Clients / Phone system.

On one of your clients run:

w32tm /resync /rediscover

By default it should pick up time from the server (PDC Emulator role holder).

The test above should give immediate results. But don't be too troubled if it takes a little while for the rest, NTP isn't instant, the client has to pull time, the server doesn't push.

Chris

Ran the command and got this error from Client:

 

Just to be sure, you're running this on one of the domain members? Not the server itself?

If so, would you try:

w32tm /query /source

Chris

This is one a WIn 7 workstation on the same domain.

Just checking :)

Please can you run:

w32tm /config /syncfromflags:domhier /update
w32tm /resync /rediscover

If in doubt about the time source you can always run "w32tm /query /source".

Chris

Here is the screen shot from commands issued:
Source points to the proper internal DC.

 

That looks much better :)

Chris

Do I have to do this on all workstations in the office?

No, you might just give it some time, the option we set above is the default for domain members.

If you find they're not synchronising we do something to make them run it from a central location.

Chris

Ok thanks.. i have a mix bag of win7 / winxp workstations.

Is there a website that links to ca.pool.ntp.org ? I want to get a visual. We are on a cell phone service by Rogers and people are now asking why the Cell phone network is off by 30 or so seconds.

hmm.. it's basically a network of volunteer organisations, this is the source:

http://support.ntp.org/bin/view/Servers/NTPPoolServers

If you want a greater degree of accuracy you might look for an OpenAccess Stratum-1 server from this list:

http://support.ntp.org/bin/view/Servers/StratumOneTimeServers

Stratum refers to the time-source (behind the server), Stratum-1 systems are typically directly connected to non-networked time sources (Stratum-0 time sources, such as Atomic Clocks). Stratum-2 take time from Stratum-1 over the network (Internet).

Chris