What is the service of telecom hang-up SMS?

"On-hook SMS" service is the active push service of enterprise advertising SMS. After the fixed line applies for this service, users can log on to the on-hook SMS platform to set up advertising SMS. When the other party dials the fixed line, it can send different advertisement short messages according to the previous connection status (including connected, unanswered, busy, etc.). ). (Users of China Telecom, China Mobile and China Unicom can get it.)

Note: The number of words for on-hook SMS is limited to 70 words. For more preferential service information, users can click on official website below, and customer service 16 is the answer.