We have some 6120 wireless handsets that occasionally drop calls with a "Watchdog Timeout" error on the screen. After a several seconds, the phone resets and associates with the AP. I've checked the signal strength, and everything seems to be ok there. So does latency and throughput back to the SVPs. This happens occasionally everywhere in our organization, but it's particularly bothersome in an offsite building connected back here through single mode fiber. If anyone knows how to get this error resolved, you'd make my users very happy.
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Watchdog Timeout
- Thread starter MrHanMan
- Start date
DaddyOfThree
Technical User
I don't think your going to find this problem without investing some serious time and fact finding.
The Nortel Wireless phones maintain a "heartbeat" with the Nortel Succession backend equipment, much like the wired Internet Telephones (i2002,i2004,1120e,1140e,1150e). I believe the Nortel Succession Signaling Server will poll every IP phone (including wireless phones) every 30 seconds (resetting a hardware watchdog timer that is built into the hardware to help the phone recover in the event of a network or software failure). If the phone misses too many polls they will reset themselves, thinking the network is down or there is some other problem.
What you need to find out is "why are the phones missing those polls?" It could be an wireless RF coverage issue, it could be a wireless bandwidth/contention issue, it could be a QoS issue on your LAN/WLAN. You probably have a Nortel 2245 somewhere in your network to convert the Unistim and SVP protocols.
One suggestion I would make is to make sure that you set your WLAN to a DTIM of 3 (default is usually 10). That should help make the phones more responsive but I honestly don't think that's your problem.
Cheers!
The Nortel Wireless phones maintain a "heartbeat" with the Nortel Succession backend equipment, much like the wired Internet Telephones (i2002,i2004,1120e,1140e,1150e). I believe the Nortel Succession Signaling Server will poll every IP phone (including wireless phones) every 30 seconds (resetting a hardware watchdog timer that is built into the hardware to help the phone recover in the event of a network or software failure). If the phone misses too many polls they will reset themselves, thinking the network is down or there is some other problem.
What you need to find out is "why are the phones missing those polls?" It could be an wireless RF coverage issue, it could be a wireless bandwidth/contention issue, it could be a QoS issue on your LAN/WLAN. You probably have a Nortel 2245 somewhere in your network to convert the Unistim and SVP protocols.
One suggestion I would make is to make sure that you set your WLAN to a DTIM of 3 (default is usually 10). That should help make the phones more responsive but I honestly don't think that's your problem.
Cheers!
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