What does Guizhou Telecom mean by sending short messages directionally in the on-hook short message service?

When the caller dials the fixed telephone of the enterprise applying for this service, the on-hook short message service platform sends different short messages customized by the enterprise to the caller by analyzing the call status of the caller, such as connected, busy and no answer, and triggers the short message after the caller hangs up. Customer service will answer your questions on the 8th. Call charges, traffic, points, you can pay attention to the official account of WeChat, China Telecom Guizhou Customer Service.