How is wifi SMS authentication realized?

At present, there are two mainstream methods to realize password authentication of WiFi hotspot SMS: one is through software, and the other is through hardware. However, relatively speaking, the cost of password authentication of WiFi hotspot SMS through software is high (mostly according to software +AP access license+SMS module+portal customization fee+installation and debugging fee+annual service fee), provided that the enterprise has built a thin AP+AC wireless environment.

So your hotel can solve this problem by installing hardware, specifically by deploying an audit gateway with the function of "WiFi hotspot SMS authentication".