Unfortunately, the SPA112 is not a supported ATA on the UC500 platform. Supportted ATAs are the ATA-186(2 analog FXO ports), SPA8000(8 analog FXO ports) and SPA8800(4 analog FXS ports, note FXO ports on not supported on this device when used with a UC500).
Please let me know if you have additional questions regarding this.
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