System is 2821 with 1 VIC2-2FXO for PSTN access running CCME 4.2.
PSTN Caller ID works fine when it is sent from the CO, whether it is shown or restricted "Private Number". But in some cases, "911" shows up on the screen. A test phone shows "Unknown number" instead of "Private Number". What would be the cause and how can I debug this in the console?