File:Analogue_modem_-_acoustic_coupler.jpg · Wikimedia Commons · See Wikimedia Commons

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modem

Also known as optical modem, modems, modulator-demodulator

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.

AI overview

A modem is a device that lets computers connect to each other over telephone lines by converting digital data into audio signals that can travel through phone networks. In early systems, users would dial a number on their phone and place the handset into the modem, which then transmitted data at relatively slow speeds of 300 bits per second.

AI-generated from the Wikipedia summary — may contain errors.

Research

1,667 papers

[Modem inhibitor angiotensin-converting enzyme zofenopril in the primary and secondary prevention of cardiovascular disease].ReviewKardiologiia · 2014Maksimov ML, Dralova OV, Ermolaeva AS
[Modem visualisation techniques in brain functions estimation].ReviewVojnosanitetski pregled · 2009Ristić S, Kozomara R, Medenica S et al.DOI: 10.2298/vsp0908663r
MODEM: multi-omics data envelopment and mining in maize.Database : the journal of biological databases and curation · 2016Liu H, Wang F, Xiao Y et al.DOI: 10.1093/database/baw117
Trauma in modem society: major challenges and solutions.ReviewThe surgeon : journal of the Royal Colleges of Surgeons of Edinburgh and Ireland · 2005Trunkey DDDOI: 10.1016/s1479-666x(05)80037-x
Two-Way Radio Modem Data Transfer for Newborn Hearing Screening Devices.Telemedicine journal and e-health : the official journal of the American Telemedicine Association · 2017Matulat P, Lepper I, Böttcher P et al.DOI: 10.1089/tmj.2016.0009
The AbCs of modem management of chronic stable angina pectoris.Clinical cardiology · 2005Conti CRDOI: 10.1002/clc.4960280302
Modem transmission of glucose values reduces the costs and need for clinic visits.Diabetes care · 2003Chase HP, Pearson JA, Wightman C et al.DOI: 10.2337/diacare.26.5.1475
Another honor for magazine. Modem Healthcare's Carlson wins prestigious NIHCM award for second time.Modern healthcare · 2011Burda D

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Wikidata facts

Image: ARRIS CM820B DOCSIS Cable Modem.jpg

Show 4 more facts

Commons category: Modems
exact match: wordnet-rdf.princeton.edu/wn31/103736610-n
Stack Exchange tag: stackoverflow.com/tags/modem
MCN code: 8517.62.55

Sources (4)

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~43 min read

Article

37 sections

Contents

Speeds
Overall history
Dial-up
History
1950s
1960s
1970s
1980s
1990s
{{anchor|56k}} {{val|56|u=kbit/s}} technologies
{{Anchor|X2|K56flex}} Early 56k dial-up products
Standardized 56k (V.90/V.92)
Evolution of dial-up speeds
Compression
Methods of attachment
Directly connected modems
Acoustic couplers
Automatic calling units
Controller-based modems vs. soft modems
Voice/fax modems
Modem Over IP (Modem Relay)
Cloud-based Modems
Popularity
TTY/TDD
Leased-line modems
Broadband
Terminology
Radio
Mobile broadband
Optical modem
Home networking
Null modem
Short-haul modem
See also
Further reading
References
External links

A modulator-demodulator, commonly referred to as a 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 LEDs to radio.