TAILIEUCHUNG - Wireless all- In-One for Dummies- P13

Wireless all- In-One for Dummies- P13:I still remember when I got my first cordless phone. Suddenly, I didn’t have to run to the kitchen when the phone rang, I just carried the phone with me. I could make a phone call from wherever I was. Wireless meant freedom, and this is just a phone that I’m talking about! | Choosing Your Frequency 339 Table 1-2 Pros and Cons of Cordless Frequency Bands Band Pros Cons 900 MHz Cheap won t interfere with Wi-Fi Usually little or no security limited range GHz Price is right more secure than 900 MHz secure Possible conflicts with Wi-Fi GHz Clear likely more secure More expensive You have an array of choices when purchasing a cordless phone. The important option is the frequency band on which the phones operates. Cordless phones are available in 900 MHz GHz and GHz models. Generally as the frequency goes higher so does the maximum distance you can take the handset from the base station and the clarity gets better. Watch out however for interference from other sources of radio waves physical structures like walls and the weather. Here are what the three frequency bands offer. 900 MHz You can buy one of these phones pretty cheaply but many manufacturers are phasing them out favoring instead the GHz and GHz models. If you re on a budget you can buy one of these analog models for less than you paid for this book but I wouldn t recommend it the phone not the book . Why The prices of GHz phones are very reasonable and cover a larger area with less likelihood of interference. Also higher frequency phones offer more conversation security It s fairly simple to listen in to a 900 MHz analog signal with the right equipment. GHz Quality and price meet here. This is the sweet spot for cordless phones most of them made today operate in this frequency range. They offer more clarity and range than you get with a 900 MHz phone. Given the number of GHz models you can find them in a wide variety of configurations choosing the features you want and not paying for ones you don t need. You can buy GHz phones in analog and digital models. These phones are also available in multiple-handset models which let you Book VI 1 Choosing and Using Cordless Phones 340 Featuring Cordless Phones add more handsets as you need them. Some

• Quản trị mạng
• Hành trình mạng không dây
• mạng WiFi
• khắc phục sự cố mạng
• chia subnet
• giáo trình mạng máy tính
• Nhiễu kỹ thuật
• kết nối mạng không dây
• mạng không dây
• Các kỹ thuật kết nối mạng không dây
• công nghệ thông tin
• hệ điều hành
• kỹ thuật lập trình
• quản trị mạng
• WiFi
• WiMax
• Lập trình web Internet
• mạng máy tính
• tài liệu mạng máy tính
• chuyên ngành mạng máy tính
• câu hỏi về mạng máy tính
• giáo trình mạng cisco