Volume Ii Part 28 (1/2)

22. Give floor plan of an automatic office.

REVIEW QUESTIONS

ON THE SUBJECT OF TELEPHONY

PAGES 271--320

1. What is a private-branch exchange?

2. What does ”P. B. X.” mean?

3. What is the function of the private-branch exchange operator?

4. Describe the key type of a small private-branch exchange switchboard.

5. Describe the different methods of supervision of private-branch connections.

6. Describe the automatic equipment of the common-battery type in private-branch exchanges.

7. How is secrecy of individual lines obtained in a private-exchange equipment?

8. What is an intercommunicating system?

9. Sketch a magneto intercommunicating system.

10. Sketch and describe a plug type common-battery intercommunicating system.

11. Sketch and describe the action of the push b.u.t.ton in the Monarch system and in the Western Electric system.

12. Sketch and describe the Monarch intercommunicating system.

13. What is the office of the junction box in this system?

14. What is a long-distance message?

15. What is the function of the repeating coil in the long-distance line?

16. Which is the simplest form of long-distance switch?

17. What is a phantom circuit?

18. Under what control is the ringing of the subscriber in long-distance calls?

19. What is meant by ticket pa.s.sing?