Yes, if the phone is on the same LAN segment as the SPA9000. You need though to connect it first the phone on the local LAN to get configuration and register, then move the phone to the remote site, as multicast traffic will not pass.
If all of these phones are connected to the UPS along with other devices and these are the only devices that seem to be powering off and on automatically and not manually. Then it's possible that you could have a hardware issue with these devices. If a firmware upgrade has just been performed on these devices, then it's also possible that the firmware upgrade didn't install all the way correctly. I would reset these devices back to factory default and upload the firmware if a firmware upgrade has recently been performed. If not and the problem persist. You may need to call into our office and get a support ticket started for these phones.
Fredrick A Wofford
Network Support Engineer
Cisco Small Business Support
Contact# 1-866-606-1866 if calling within the United States.
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