Chapter 9 Communications Circuits 9.8.3 Concentration Concentrators a. combine several low speed circuits into one higher speed circuit b. can be though of as a circuit multiplexer contain intelligence and buffers d. are frequently used for economic reasons www.gxmu.edu.cn9.8.3 Concentration Concentrators _____. a. combine several low speed circuits into one higher speed circuit b. can be though of as a circuit multiplexer c. contain intelligence and buffers d. are frequently used for economic reasons www.gxmu.edu.cn Chapter 9 Communications Circuits