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  1. sh8080

    Can't display System Features on Panasonic Phones after replacing KX-TD816 switch

    Fixed I swapped the PROMS from the original switch to the replacement switch and my access to System Features on the KT-7433 phone displays has been restored. Hope somebody else benefits from this. SH8080
  2. sh8080

    Can't display System Features on Panasonic Phones after replacing KX-TD816 switch

    Hi All, I just replaced the 18 year old Panasonic KX-TD816 in my home with a used one because the original had too much audio hum on the lines. I am using the original KX-T7433 proprietary phones with 3 line display. I downloaded my configuration and the replacement fired right up and has...

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