Following the update to Messaging Gateway (SMG) version 10.6 the Control Center no longer reports CPU temperature and an error message appears in the messages log. Email alerts may also be generated if Administration->Alerts->Events has been configured to send alerts on Hardware Failures
2015 Nov 8 00:10:12 (crit) SMS:  CPU internal temperature in Failure state (Unknown C)
The tool used to detect the planar CPU temperature is returning an unexpected value on SMG 8340 / Dell R210-II hardware.
This issue has been addressed with the Messaging Gateway 10.6.2 release.
Please see the Messaging Gateway Administration Guide for detailed instructions on how to update the SMG software.