TBP11ZV3M building intercom mainboard adopts patch components, direct call, coding, and visual integration on the same circuit board. It can be assembled into a complete machine with keyboard or digital tube display circuit. The use of this module has the following advantages: 1. The PCB area is reduced and the overall cost is reduced; 2. The size is small and easy to match with various shells; 3. The double-sided PCB and patch components are used for anti-vibration and good reliability; 4. Reduce the variety of mainboard and reduce the total inventory of manufacturers, improve efficiency.