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9608 Phones log out every night

9608 Phones log out every night

9608 Phones log out every night

(OP)
I have a group of 6 - 8 Avaya 9608 phones in a wing of the building that log off almost nightly. No other phones do this. Could it be the subnet they are on? Any ideas? They are built like all other phones that do NOT log off unless done manually.

RE: 9608 Phones log out every night

I would look at the network. Could be the subnet, or could be power.

RE: 9608 Phones log out every night

sip?
ntp?

Phones will logout if they send a registration request and get rejected. Like, invalid H323user/pass or SIP 404 you're not found.
They'll also sometimes logout if they get stuck in a time paradox.

Here's a couple of scenarios:
You have an LSP that hasn't got new translations since before those phones were added. The other phones at the office were built before the last time LSP translations were pushed, so they exist in the LSP but your 6 don't.

Network blip in the middle of the night kicks the gateway into LSP, phones register to LSP, and it all recovers fine except for the 6 phones that don't exist in the LSP - they log out.

Another scenario:
You have SIP phones SET SIP CONTROLLER LIST = SM1,SM2,BSM (which is technically wrong, BSM shouldn't be in the settings file, it's learned and persistent from PPM). Phones periodically try to register to everything in the settings file (usually once an hour). If their profile does not include the BSM in SMGR, then the BSM doesn't know about them. Their periodic registration gets a 404 not found, they logout.

NTP:
If the phones have the right time, and their SM is slow a minute, and the CM under has the right time, then SIP SUBSCRIBE messages timestamped by the phone and CM and SM can get caught in a time paradox. Much like when Marty was about to hook up with his mom and he saw his brothers and sisters fading away in the picture, time paradoxes can make SIP phones crazy.

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