英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：

Modem    音标拼音: [m'odəm]
调制解调器; ( MODULATOR-DEMODULATOR
的缩写,将计算机数位和通讯模拟信号相互转换的机器)

调制解调器; ( MODULATOR-DEMODULATOR 的缩写,将计算机数位和通讯模拟信号相互转换的机器)

modem
数据机;调复机 M

modem
数据机

modem
n 1: (from a combination of MOdulate and DEModulate) electronic
equipment consisting of a device used to connect computers
by a telephone line

modulator-demodulator \mod"u*la`tor-de`mod"u*la`tor\, n.
An electronic device that converts electronic signals into
sound waves, and sound waves into electronic signals, used to
transmit information between computers by the use of ordinary
telephone lines; usually called a {modem}.
[PJC]


modem \mo"dem\ (m[=o]"d[e^]m), n. [by shortening from
modulator-demodulator.]
An electronic device that converts electronic signals into
sound waves, and sound waves into electronic signals, used to
transmit information between computers by the use of ordinary
telephone lines; also called {modulator-demodulator}; as, the
latest modems can transmit data at 56,000 baud over a clear
telephone line. The speed of transmission of information by a
modem is usually measured in units of {baud}, equivalent to
bits per second.
[PJC]

(Modulator/demodulator) An
electronic device for converting between serial data
(typically {EIA-232}) from a computer and an audio signal
suitable for transmission over a telephone line connected to
another modem. In one scheme the audio signal is composed of
silence (no data) or one of two frequencies representing zero
and one.

Modems are distinguished primarily by the maximum data rate
they support. Data rates can range from 75 bits per second up
to 56000 and beyond. Data from the user (i.e. flowing from
the local terminal or computer via the modem to the telephone
line) is sometimes at a lower rate than the other direction,
on the assumption that the user cannot type more than a few
characters per second.

Various data {compression} and error correction {algorithms}
are required to support the highest speeds. Other optional
features are {auto-dial} (auto-call) and {auto-answer} which
allow the computer to initiate and accept calls without human
intervention. Most modern modems support a number of
different {protocols}, and two modems, when first connected,
will automatically negotiate to find a common protocol (this
process may be audible through the modem or computer's
loudspeakers). Some modem protocols allow the two modems to
renegotiate ("retrain") if the initial choice of data rate is
too high and gives too many transmission errors.

A modem may either be internal (connected to the computer's
{bus}) or external ("stand-alone", connected to one of the
computer's {serial ports}). The actual speed of transmission
in characters per second depends not just the modem-to-modem
data rate, but also on the speed with which the processor can
transfer data to and from the modem, the kind of compression
used and whether the data is compressed by the processor or
the modem, the amount of noise on the telephone line (which
causes retransmissions), the serial character format
(typically {8N1}: one {start bit}, eight data bits, no
{parity}, one {stop bit}).

See also {acoustic coupler}, {adaptive answering}, {baud
barf}, {Bulletin Board System}, {Caller ID}, {SoftModem},
{U.S. Robotics}, {UUCP}, {whalesong}.

{Usenet} newsgroup: {news:comp.dcom.modems}.

(2002-05-04)

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Modem - Wikipedia
    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
  • Amazon. com: Computer Networking Modems - Computer Networking Modems . . .
    Shop a wide selection of Modems at Amazon com including Cable Modems, ISDN Modems, DSL Modems, Analog Modems, Computer Modems more
  • Modems in Modems - Walmart. com
    Shop for Modems in Modems Buy products such as ARRIS SURFboard DOCSIS 3 1 Cable Modem, Certified for Cox, Comcast Xfinity and Spectrum Approved for Gigabit plans! at Walmart and save
  • DSL Cable Modems - Staples
    An internet modem is a device that connects our computers, smartphones, and other devices to the internet It acts as a translator, converting the signals from our devices into a format that can be transmitted over the internet
  • modems | Newegg. com
    Search Newegg com for modems Get fast shipping and top-rated customer service
  • Internet Modems for High-Speed Cable Connectivity - Target
    Discover high-speed internet modems with speeds up to 2500 Mbps Explore options from brands like SURFboard, NETGEAR, and TP-Link, featuring DOCSIS 3 1, Wi-Fi 6, and compatibility with major cable providers
  • The Difference Between Modems and Routers | Router vs Modem - T-Mobile
    Modem vs Router: How to spot your router If you have a separate modem and router, and you’ve traced the coax or DSL cable to your modem, the next device in the chain is your router Because your router is designed to connect multiple devices to your network, it will usually have more ports than your modem
  • Using approved third-party equipment with Xfinity Internet and Xfinity . . .
    You can buy and use your own modem or gateway instead of renting one from Xfinity Keep in mind that the Xfinity Wireless Gateway offers great coverage, fast speeds and a home WiFi hotspot How to check compatibility Before buying your own equipment: Go to My Device Info to check if your device works with Xfinity Internet and or Voice service





中文字典-英文字典  2005-2009