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- Modem abstract "A modem (modulator-demodulator) is a device that modulates an analog carrier signal to encode digital information and demodulates the signal to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data. Modems can be used with any means of transmitting analog signals, from light emitting diodes to radio. The most familiar type is a voice band modem that turns the digital data of a computer into modulated electrical signals in the voice frequency range of a telephone channel. These signals can be transmitted over telephone lines and demodulated by another modem at the receiver side to recover the digital data.Modems are generally classified by the amount of data they can send in a given unit of time, usually expressed in bits per second (bit/s or bps), or bytes per second (B/s). Modems can also be classified by their symbol rate, measured in baud. The baud unit denotes symbols per second, or the number of times per second the modem sends a new signal. For example, the ITU V.21 standard used audio frequency shift keying with two possible frequencies, corresponding to two distinct symbols (or one bit per symbol), to carry 300 bits per second using 300 baud. By contrast, the original ITU V.22 standard, which could transmit and receive four distinct symbols (two bits per symbol), transmitted 1,200 bits by sending 600 symbols per second (600 baud) using phase shift keying.".
- Modem thumbnail Analogue_modem_-_acoustic_coupler.jpg?width=300.
- Modem wikiPageExternalLink modulations.html.
- Modem wikiPageExternalLink hmo.htm.
- Modem wikiPageExternalLink protocols.html.
- Modem wikiPageExternalLink recommendation.asp?type=products&lang=e&parent=T-REC-V.
- Modem wikiPageExternalLink getting-connected-a-history-of-modems-657479.
- Modem wikiPageID "20647197".
- Modem wikiPageRevisionID "603350725".
- Modem date "20060619043804".
- Modem hasPhotoCollection Modem.
- Modem title "Columbia University - Protocols Explained".
- Modem url protocols.html.
- Modem subject Category:1958_introductions.
- Modem subject Category:American_inventions.
- Modem subject Category:Bulletin_board_systems.
- Modem subject Category:Logical_link_control.
- Modem subject Category:Modems.
- Modem subject Category:Physical_layer_protocols.
- Modem comment "A modem (modulator-demodulator) is a device that modulates an analog carrier signal to encode digital information and demodulates the signal to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data. Modems can be used with any means of transmitting analog signals, from light emitting diodes to radio.".
- Modem label "Modem".
- Modem label "Modem".
- Modem label "Modem".
- Modem label "Modem".
- Modem label "Modem".
- Modem label "Modem".
- Modem label "Modem".
- Modem label "Módem".
- Modem label "Модем".
- Modem label "مضمان".
- Modem label "モデム".
- Modem label "调制解调器".
- Modem sameAs Modem.
- Modem sameAs Modem.
- Modem sameAs Μόντεμ.
- Modem sameAs Módem.
- Modem sameAs Modem.
- Modem sameAs Modem.
- Modem sameAs Modem.
- Modem sameAs Modem.
- Modem sameAs モデム.
- Modem sameAs 모뎀.
- Modem sameAs Modem.
- Modem sameAs Modem.
- Modem sameAs Modem.
- Modem sameAs m.04wyr.
- Modem sameAs Q5607.
- Modem sameAs Q5607.
- Modem wasDerivedFrom Modem?oldid=603350725.
- Modem depiction Analogue_modem_-_acoustic_coupler.jpg.
- Modem isPrimaryTopicOf Modem.