Hang on a second. If you have a phone at site A and it is registering to the TPS (Telephone Proxy Server) on the Signaling Server at B, if the registration happens OK, then you are fine from that perspective.
The difficulty you thought you are having is that the phone is reseting several times each hour.
The telephones have a watchdog timer in them that is 200 seconds in length. If the watchdog reaches 0, then the phone reboots itself and attempts to register against the S1 or S2 Node IP depending on the settings in the phone and how frequently it has rebooted.
The TPS RESETS the watchdog timer to 200 every 100 seconds. So in theory, you could miss one reset, and get the second reset before hitting 0. (I am saying rough time estimates here).
So if your phone is reseting, that implies that the watchdogs are not getting through all of the time. This is a network problem.
In a Network Virtual Office environment, when you log in, the phone registers against your Home TN using the NCS (Network Connect Server) in the NRS to get to your Home TPS. The local HOST TN (The phone you used to login on) is cached in the set for when you log out, or if the ESA (Typically 911 in the US) is dialed.
The point is, the same watchdog timer is in place from your set to the HOME TPS, and if the watchdogs are not making it, they are not making it. You need to focus on the reset problem.
Now as for Network Virtual Office, yes, the NRS needs to be setup with a dialplan, you need Virtual trunks on each CS1000 and the NCS service needs to be defined in the Gateway Endpoints once they are built and registered in the NRS.
Some simple ethernet sniffing is essential need here. You need to sniff the port of the phone that is reseting and watch for the watchdog packets coming in, or not. The predicament here is that you can capture the packets OK, but you will need Nortel ETAS (now called NETS btw) to decode these as the phone uses UNIStim signaling, and ethereal can't decode that without a special plug-in that is not accessible to the public.
Sorry for the lengthy response here, I just did not want you to go through the problem of setting up Network-wide IP Virtual Office only to have the exact same issue. Work with you data guys to investigate the network. Is there a QoS strategy in place? Are the IP Phones set up to do QoS? Does the Layer 2 (lan) and Layer 3 (wan) policy work with each other? You would be surprised how many large companies have not reviewed this for functionality or accuracy. |