ответить на вопросы (12 вопросов) • How is the telephony defined?
• What are the main parts of a telephone receiver?
• In what cap are they housed?
• Why do telephone sets and lines need protection?
• What is a fuse? What is its function?
• What is the main difference between wireline and wireless telephones?
• Do wireless telephones have any connections?
• Is the mobility of cordless telephones limited or is it limitless?
• How large may be a service area of cellular telephones?
• Are the weight and size of cellular telephones increasing or decreasing?
• What are the two types of in-flight radiotelephones?
• Why may satellite-based systems be employed anywhere in the world?

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