Hello,
Let me ask this question because I have installed a Cisco ATA 192 gateway at a customer's home and since the doorman no longer hangs up when you hang on another phone.
I got in touch with the doorman's manufacturer and he told me that it had to come from the frequency and rate at the Busy Tone.
I tried to configure it, but it doesn't change anything.
I sent you a photo of the busy tone can give me the syntax to set it up with a frequency of 440 Hz and a rate of 0.5s-0.5s
Cordially,
MCO
