What do you mean this call is a point-to-point SMS?

This way of talking or transmitting information is to send the information directly to the other party. When the other party's mobile phone is turned off or unable to answer the phone, the system will send a short message to the other party's mobile phone in the name of your number to inform the other party of your call information. This way facilitates point-to-point information transmission, even if telephone contact is impossible.