I am looking for help with product placement for a video solution to allow a person at point A to communicate (Voice / Video / Data) to a group of people at point B

During installation of Cisco Aironet 350 devices power goes off. what could be the problem. please help

sir,i am facing a promblem with a 3550 catalyst switch.the mac address learned by 1 st port of a machine,when it is removedfrom port1 and switched to another port .the port shutdown.