Volume Ii Part 26 (2/2)

14. Give diagram of the Stromberg-Carlson multiple-board circuit.

15. What is the most important piece of apparatus in a multiple switchboard?

16. What is the s.p.a.cing of the multiple jacks in the No. 1 Western Electric switchboard?

17. How do the relays of the Western Electric Company differ from those of other companies?

18. Describe the relay construction of the Monarch Telephone Company.

19. What is meant by inter-office trunking?

20. What is the present practice in America as to the capacity of multiple h.o.a.rds?

21. What is the tendency in Europe regarding the capacity of multiple boards?

22. Discuss the preferences in American practice.

23. State the different methods of trunking between exchanges.

24. When are two-way trunks employed?

25. Make diagram of the Western Electric inter-office connection system.

26. Describe the standard four-party line trunk ringing key of the Western Electric Company.

27. Sketch and describe a keyless trunk.

28. Give diagram of the inter-office connection of the Kellogg system.

29. How does this system differ from the Western Electric in regard to the ringing?

30. Why are the A and B switchboards in large exchanges entirely separated?

REVIEW QUESTIONS

ON THE SUBJECT OF TELEPHONY

PAGES 135--226

1. What is the general object of automatic telephone systems?

2. What are the common arguments against these systems and how are they met?

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