modem
Sign in to savethumb|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.
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Article
37 sectionsContents
- 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
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.
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.