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This article mainly introduces the role of modem, the introduction in the article is very detailed, has a certain reference value, interested friends must read it!

The role of modem is: 1, signal conversion, successful conversion into analog signals suitable for analog signal transmission;2, synchronous transmission;3, data error correction;4, multiplexing;5, direct connection.

The role of modem is:

Signal conversion: The data signal sent by the signal source can be successfully converted into an analog signal suitable for analog signal transmission. At one end of the data, it will complete the conversion opposite to the source, and it can also process noise and distorted waveforms.

Synchronous transmission: When the data is in transmission, the information will continue to be synchronized at the receiving end, which will extract the synchronization information sent and have synchronization phase lock, and then use the generated carrier wave in phase with the source for sampling and sink generation timing, so as to ensure that the sink and the source are synchronized.

Data error correction: In network communication, data is sent in the form of data packets, because of signal attenuation and poor line quality, or interference and other problems, there are often data packets lost or damaged in transmission. Modems use error-correcting protocols to detect errors in received packets and, if errors are detected, attempt to retrieve the correct packet or use algorithms to attempt to repair damaged packets.

4, multiplexing: hard disk can also use the orthogonality of the seat number, in the use of various coding and modulation methods to achieve channel multiplexing. At the same time, it can also compensate for the interference damage of harmful factors to the signal.

Direct connection: For example, many users can connect the telephone line of the modem directly without using acoustic coupling facilities. Alternatively, the user can send a sequence message to the modem over some communication link, perfectly converting it into an answer to the active user, or the number dialed by the modem can be stored through the software access function of the PC keyboard, thus establishing a carrier signal connection with the host system.

The above is all the content of this article "What role does modem have?" Thank you for reading! Hope to share the content to help everyone, more relevant knowledge, welcome to pay attention to the industry information channel!

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