Hi, I have a uc500 my problem is:
The 4 ports FXS is dead, I don't have a tone signal, ring tone, etc.
I review the status of port 0/0/0:
show voice port 0/0/0
Foreign Exchange Station 0/0/0 Slot is 0, Sub-unit is 0, Port is 0
Type of VoicePort is FXS VIC3-4FXS/DID
Operation State is DORMANT
Administrative State is UP
The Last Interface Down Failure Cause is Administrative Shutdown
Description is not set
Noise Regeneration is enabled
Non Linear Processing is enabled
Non Linear Mute is disabled
the port apparently is ok, but It does not work.