Micros 3700 single terminal slow to authorize credit cards

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We have a RES 3700 system with about 10 terminals (all mTablets). I recently swapped one terminal out and replaced it with one from a seasonal revenue center.

Ever since I made that change credit card authorizations on that terminal have been very slow. We're talking more than 30 seconds to authorize a charge. What's strange is that all other revenue centers attached to the same system are functioning fine.

Another thing I noticed is that the terminal is showing as offline on the Control Panel, and I can't access it via VNC, yet it's able to connect to the database and (eventually) process credit cards.

 

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Fixed it.
I ran Advanced IP Scanned and noticed that the device had a different IP address than it was originally assigned. So on the mTablet I re-ran CAL and chose the correct device from the list. All was fine after that. (Just adding this here in case someone runs into a similar situation.)