We have an elevator plugged into one of the FXS ports on the P560 Series system. When the emergency button is pressed we hear the dial tone and the numbers being dialed, but the yeastar acts like it never hears the tones. All we ever hear is dial tone.
The elevator users a Rath controller phone built into the elevator. If we plug a standard analog phone in dial out works fine. It is only with the autodialer that yeastar fails to dial the numbers.