How to use on-hook SMS? How to open the on-hook SMS?

There are two modes for Jiejiatong to hang up SMS. One mode is the platform mode, where they send you messages at the expense of the platform, and the other is the SIM card mode, where users send some messages to users after making a phone call, and hang up short messages: after customers or consumers dial the fixed telephone announced by the enterprise and hang up (connect or disconnect), the system will send the preset information content of the enterprise to the customer's mobile phone, and the enterprise will transmit all kinds of information to customers or consumers through these information to realize business-to-business communication. You can flexibly set up on-hook SMS for connected or disconnected phones.