Thanks for posting! Typically FXS ports get in this state because of a site wiring issue. FXS ports contain a circuit protection feature that shuts down the port in the case of an electrical short. This is generally paired with frequent event messages indicating a wiring fault. If you believe that no physical wiring issue exists, you may need to call 888-423-8726 to open a support queue ticket so that we can assist in troubleshooting.
Things you may want to check would include verifying that the Amphenol cable is firmly seated on the back of the unit. Also, check for potential issues with the 66 block or other site wiring connections. We would also check to see if a "shutdown" and "no shutdown" on the interface clears the issue. Another indication of a wiring issue would be if removing the Amphenol connector for a period of time cleared the issue.
Hope this helps,
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