What are the advantages of this scheme?

1. Just connect to the telephone line and install the telephone to use, which is simple and hassle-free.

2. Students can make calls when they pick up the machine, no need to insert and swipe the card, and also avoid the trouble of arranging for a special person to recharge, refund, and replenish the student's IC card.

3. It also supports a time limit of 3 minutes for a single call to solve the phenomenon of queuing caused by long-term occupation.

On-site installation diagram: