modems

A modulator-demodulator or modem is a computer hardware device that converts data from a digital format into a format suitable for an analog transmission medium such as telephone or radio. A modem transmits data by modulating one or more carrier wave signals to encode digital information, while the receiver demodulates the signal to recreate the original digital information. The goal is to produce a signal that can be transmitted easily and decoded reliably. Modems can be used with almost any means of transmitting analog signals, from light-emitting diodes to radio.
Early modems were devices that used audible sounds suitable for transmission over traditional telephone systems and leased lines. These generally operated at 110 or 300 bits per second (bit/s), and the connection between devices was normally manual, using an attached telephone handset. By the 1970s, higher speeds of 1200 and 2400 bit/s for asynchronous dial connections, 4800 bit/s for synchronous leased line connections and 35 kbit/s for synchronous conditioned leased lines were available. By the 1980s, less expensive 1200 and 2400 bit/s dialup modems were being released, and modems working on radio and other systems were available. As device sophistication grew rapidly in the late 1990s, telephone-based modems quickly exhausted the available bandwidth, reaching the ultimate standard of 56 kbit/s.
The rise of public use of the internet during the late 1990s led to demands for much higher performance, leading to the move away from audio-based systems to entirely new encodings on cable television lines and short-range signals in subcarriers on telephone lines. The move to cellular telephones, especially in the late 1990s and the emergence of smartphones in the 2000s led to the development of ever-faster radio-based systems. Today, modems are ubiquitous and largely invisible, included in almost every mobile computing device in one form or another, and generally capable of speeds on the order of tens or hundreds of megabytes per second.

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  1. J

    Tools FREE Admin Access for Globe Modems B310as-938/B315s-938/B525s-65a/B312-939/B535-932

    ‼️ FREE Admin Access is now closed ‼️ FREE ADMIN ACCESS from December 25, 2023 to January 1, 2024❕ ⬇️FREE Admin Access for Globe Models: ✅B310as-938 ✅B315s-938 ✅B525s-65a ✅B312-939 Config File Version 10.0.3.1 ✅B535-932 Config File Version 10.0.2.3 (Postpaid Version) Para makuha nyo po yung...
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    Mga bago ni globibo, maganda Kaya? Ayos Kaya specs nito? 🤔 Check out Globe At Home Prepaid WiFi with FREE 50GB Dataat 50% off!₱999.00 only!Get it on Lazada now! | Check out Globe At Home Prepaid WiFi with FREE 50GB Dataat 50% off!₱999.00 only!Get it on Lazada now! Check out Globe At Home...
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    Tools Huawei Manager 2023 Bookmark for Browser (FREE Band Locking to Huawei Modems)

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    Echolife DN8245W

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  13. E

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    Ano po inyong Top 3 na PARABOLIC ANTENNA? Yung compatible sa halos lahat ng modems. Pa share na rin ng link san pwede bumili, salamat po.
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  16. S

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  18. F

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  22. M

    Closed Modem

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