I want to know why when I make a call with the ATD command. The modem does not return the results of the progress of the call.
OK If successfully connected
CONNECT Connection has been established
RING The DCE has detected an incoming call signal from the network
NO CARRIER The connection cannot be established
BUSY Engaged (busy) signal detected
NO ANSWER If no hang up is detected after a fixed network timeout
CONNECT Same as CONNECT but includes the data rate
RING CTM The MS has detected an incoming CTM call signal from the network;
this code is proprietary
CONNECT FAX Same as CONNECT but includes the indication related to a fax call
Of these, only the modem returns OK (this only guarantees that it will make the call), NO CARRIER (when the call is cut off or the person is busy on another call) and RING (when a call comes in)
Why does CONNECT not return me, which should be when a person answers the call.