Have an IP 500v2 cabinet R8.1 (69) installed 2 years ago that suddenly had all phones go dark. When logging into config, all cards show up as "Unknown". Have solid red lights on ports 1/9 on all cards. Have tried upgrading system to 8.1(95) and have defaulted system but the problem persists. Any suggestions or advice would be appreciated.
Thank you,
Thank you,
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