Use this method to collect DTMF (dual-tone multi-frequency) input in an active call.
An API key to authorize your request
Call ID.
DTMF collection parameters
Specifies the minimum number of digits to collect
1 <= x <= 201
Specifies the maximum number of digits to collect
1 <= x <= 205
Timeout for digit collection, in seconds
1 <= x <= 6010
Character that ends digit collection
"#"
URL to receive digit collection results
"https://examples.com/dtmf-callback"
DTMF collection successfully started.
true