Had a site that the system will randomly lock up and stop processing calls and displays on all phones will go blank. System has to be removed from network, powered down and restarted to return to service.

Looking in the alarm log, the only issue we see is IP Collision. NTAC said to run a Wireshark test to look for any ARP probing to 0.0.0.0, which we actually did find. The customer's camera system was doing exactly that. Disconnected it and the ARP probe stopped. System ran great for another week and did it again. Alarm log still only shows an IP Collision. There is nothing probing to 0.0.0.0 and we have scanned the network to look for a duplicate IP address but nothing is showing up.

NTAC wants Wireshark logs from normal use as well as one from when it fails. There is no rhyme or reason as to when it fails so trying to start it before it fails is tough.

Anybody ever had anything similar?

System is a SV9100 CP10, version 10.60.53 with Netlink plus two IP terminals so removing from the network for any length of time isn't an option.