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{{Short description|Device that modulates an analog carrier signal to encode digital information}}
{{Redirect-distinguish|Computer modem|Computer Modern}}
{{For-multi|the French political party known as Modem|Democratic Movement (France)|the ancient Hebrew city|Modi'in-Maccabim-Re'ut}}
[[File:Analogue modem - acoustic coupler.jpg|thumb|[[Acoustic coupler]] modems used a telephone handset as the audio medium, with the user dialing the desired number and then pressing the handset into the modem to complete the connection. These systems generally operated at a speed of 300 bits per second.]] {{Modulation techniques}}
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