About this blog

This blog was created for anyone with an interest in the Avaya IP Office. As a user,you will find tips and information,as an installer,you will find ideas to help you do your job more efficiently. The causal maintainer will find helpful information to manage your phone system. For the sales person,there is information on what solutions work well for different circumstances.

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Time services –IP Office and Windows

We focus a lot of articles on the Avaya IP Office. Time standards are something that keep cropping up. Fortunately,getting the IP Office to keep the right time isn’t too difficult. One of the main things to keep straight is connectivity to the Internet and correct DNS resolution. To telecom techs still struggling with the data side of things,DNS stands for Domain Name Server. Essentially,this service translates an intelligible name like www.yahoo.com to its public IP address. This address can vary from time to time because servers go up and down based on load and a whole array of other factors.

NTP is short for Network Time Protocol. Public NTP servers are accurate to milliseconds. The really fancy ones are run by the DOD (Navy,I believe) and use a cesium clock that’s stupid accurate. The likes of us cannot subscribe to their service directly. What’s important to find is an NTP service that you can grab the correct time from. Not all of them allow connections,some require passwords and other authentication. Fortunately,for the likes of us schleps installing phone systems,there are services that we can connect to without any grief.

So,where does DNS and NTP come together? One of the time sources I use is time-a.nist.gov. When you enter this FQDN (Fully Qualified Domain Name),into the appropriate spot in the IP Office configuration,it has to resolve that name (FQDN) to an IP Address –hence,using DNS,requiring a connection to the internet. So,two more things needed –an IP route to the internet gateway on your network and at least one DNS name server address in the DNS tab. Now,I can’t give you your gateway address,that is unique to your or your clients’network. Ask the IT administrator if you can’t find it. A good DNS server,now that’s something I can give you. Google isn’t an entity that is going away unless something really shakes up the Internet,so I like to use their DNS server address 8.8.8.8. You can also ask the IT admin what the local ISP DNS servers are,if you don’t want to use Google’s. I just like them because they are really easy to remember.

So,now on to Windows…chances are you won’t need to do this if all you are doing is installing a phone system,however,it may come in handy to know how to make all the systems in the Windows network synchronize their times also. This only applies if the systems are using Active Directory…

Log into the computer that is the Active Directory Domain Controller and open a command prompt with elevated permissions.
Enter the following -
1. C:>net stop w32time (this stops the time service)
2. C:>w32tm /config /syncfromflags:manual /manualpeerlist:”0.pool.ntp.org,1.pool.ntp.org,2.pool.ntp.org” (configures the system to use external time services)
3. C:>w32tm /config /reliable:yes (makes the domain controller the reliable time service for the workstations)
4. C:>net start w32time (start the time service)

You are done!

You can check the external time servers by entering C:>w32tm /query /configuration

Finally,if you are impatient like I am and you want your workstation or system to now synchronize properly to the newly appointed time authority on your network,time in the following…

Open a command prompt with elevated permissions…

c:>net time \\AD server name here /set /yes

VOILA!!

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