1. A tandem switch is used to connect two switches together while a class 5 switch interfaces with the individual subscriber and routes the line side traffic onto the trunk side of the switch. True or False 2. refers to the busiest calling hour of the day, week, month or year. And refers to the average length of time the subscriber stays on the telephone. 3. If one circuit receives thirty calls and each call lasts thirty seconds, how much of that circuit is being used in CCS? A. 9 B. 27 C. 0.9 D. 90 E. 2.7 4. If one circuit receives 50 calls and each call lasts 45 seconds, how much of that circuit is being used in Erlang? A. 0.5 B. 6.25 C. 0.625 D. 62.5 E. 0.18 5. If there is a circuit that is being used 36 CCS then how much of that circuit is being used in Erlang? A. 1 B. 2 C. 0.1 D. 0.2 E. 0.5 6. If there is a circuit that is being used 0.75 Erlang then how much of that circuit is being used in CSS? A. 36 B. 25 C. 2.7 D. 27 E. 0.625 7. Establishing a telephone call would be impossible without signaling. True or False 8. Explain the importance of signaling in the telephone network. 9. Explain how touch-tone dialing sends digits to the switch and write the name given to define touch-tone dialing. 10. Explain how rotary dialing sends digits to the switch.