AudioCodes Mediant 500 E-SBC User Manual page 526

The Home page also displays the HA operational status of the device to which you are
currently logged in. This is displayed in the 'High Availability' field under the General
Information pane:

"Not Operational": HA is not configured or the installed Software License Key does not
include the HA feature

"Synchronizing": Redundant device is synchronizing with Active device

"Operational": The device is in HA mode

"Stand Alone": HA is configured but the Redundant device is missing and HA is
currently unavailable

"Not Available": HA is not configured correctly (error)
User's Manual 526
Mediant 500 E-SBC
Document #: LTRT-10437