Using Skype for Business requires a microphone, as well as a camera if you want to use video. Many lecterns on campus are equipped with a webcam and most laptops have them built in. You can also choose video options separate from speaker and mics. So in rooms equipped with wall mounted cameras, you could opt to have one of the wall mounted cameras that faces the classroom as the video, while the mic from the webcam captures your audio. You will need to have the projector on for sound to come out in the room speakers.
If you want to use Skype for Business to connect with someone outside of Eastern who has a personal Skype account, you need to have the person on the other end already added as one of your contacts prior to your call. You can do this by starting Skype for Business and doing the following:
At this point you have to wait for you contact to accept your request. Once they have, you can use Skype for business to contact them as you would any other Skype contact.