Term
ADSL
Asymmetric Digital Subscriber Line |
|
Definition
| A high speed digital subscriber line technology that can use ordinary telephone lines for downstream data transmission of up to 6 Mpbs and up to 1Mbps for upstream transmission. |
|
|
Term
| Asynchronous Communication |
|
Definition
| Communications that occur in discrete units in which the start of a unit is signaled by a start bit at the front and a stop bit at the back signals the end of the unit. |
|
|
Term
|
Definition
| A modem control command set designed by the Hayes company. this standard modem command set begins each command with AT (for Attention) and allows communications software or users to directly control many modem functions. |
|
|
Term
|
Definition
| An ISDN interface that consists of three channels. two are 64 Kbps channels for data, voice , video, and graphics transmissions. third is a 16 Kbps channel used for communications signaling. |
|
|
Term
|
Definition
| A digital Modem device designed for use with cable TV system providing high speed data transfer . It may include an analog modem component that is used with a conventional telephone line connection for information sent from the user tot he ISP. |
|
|
Term
|
Definition
| A hardware or software component of a modem that defines an individual modem's capabilities. the controller interprets AT commands and handles communications protocols, for example. |
|
|
Term
|
Definition
| An internal automatically running program usually in Unlix/Linux that serves a particular function such as routing e-mail to recipients or supporting dial-up networking connectivity. |
|
|
Term
DCE
Data Communication Equipment |
|
Definition
| A device such as a modem that converts data from a DTE, such as a computer, for transmission over a telecommunciation line. The DCE normally provides the clock rate/clocking mechanism necessary for communications. |
|
|
Term
DOCSIS
Data Over Cable Service Interface Specification |
|
Definition
| A set of standards and equipment certification to provide stability to cable modem communications. |
|
|
Term
|
Definition
| The hardware or software portion of a modem that is responsible for converting digital into analog signals for transmission over a telephone line and for converting analog signals into digital data for transmission to the computer. |
|
|
Term
DTE
Data terminal Equipment |
|
Definition
| A computer or computing device that prepares data to be transmitted over a telecommuniction line to which it is attached using a DCE, such as a modem. |
|
|
Term
|
Definition
| A modem like device that transfers data via digital lines instead of analog lines. |
|
|
Term
DSP
Digital Signal Processor |
|
Definition
| A software data pump used in such software driven modems such as the winmodem. |
|
|
Term
DSL
Digital Subscriber Line |
|
Definition
| A technology that uses advanced modulation technologies on existing telecommunications networks for high-speed networking between a subscriber and a telco and that offers communication speed up to 85Mbps. |
|
|
Term
|
Definition
| A hardware or software feature in modems that lets a receiving modem communicate to the sending modem that it needs more time to process previously sent data. When the current data is processed successfully, the receiving modem notifies the sending modem that it can resume data transmission. |
|
|
Term
G.lite ADSL
G. Lite Asymmetric Digital Subscriber Line |
|
Definition
| A plug and play compatible version of ADSL that transmits at 500 Kbps upstream and 1.5Mbps downstream. |
|
|
Term
HDSL
High Bit Rate Digital Subscriber line |
|
Definition
| A form of high speed digital subscriber line technology that has upstream and downstream transmission rates of up to 1.544Mbps. |
|
|
Term
|
Definition
| A software approach to handling data pump duties in software based modems such as the winmodem. |
|
|
Term
ISDN
Integrated Services Digital Network |
|
Definition
| A digital telephone line used for high speed digital computer communications, videoconferencing, internet connections, and telecommuting. |
|
|
Term
IDSL
Integrated Services Digital Network Digital Subscriber Line |
|
Definition
| A DSL version that is compatible with a digital loop Carrier device that may be used on some telephone networks. IDSL provides upstream and downstream communications at up to 2.3Mbps. |
|
|
Term
ITU
International Telecommunications Union |
|
Definition
| An international organization that sets telecommunications standards for modem and WAN communications. |
|
|
Term
|
Definition
| Communications interference from any source , such as from electromagnetic interference (EMI) from electric motors or radio frequency interference (RFI) from radio wave communications. |
|
|
Term
|
Definition
| A hardware device that a computer to exchange digital data with another computer via an analog telephone line or dedicated connection. |
|
|
Term
|
Definition
| Adata communciations process that ensures data integrity through a system of data comparisons between the sending and receiving computer. |
|
|
Term
POTS
Plain old telephone Service |
|
Definition
| Regular voice grade telephone service. |
|
|
Term
PRI
Primary Rate interface |
|
Definition
| An ISDN interface that consists of switched communications in multiples of 1.544Mbps |
|
|
Term
|
Definition
| An established guideline that specifies how networked data, including data sent over a telephone network, is formatted into a transmission unit, how it is transmitted,and how it is interpreted at the receiving end. |
|
|
Term
PSTN
Public Switched Telephone Network |
|
Definition
| Regular voice grade telephone service. |
|
|
Term
RADSL
Rate Adaptive Digital Subscriber Line |
|
Definition
| A high speed data transmission technology that offers upstream speeds of up to 1Mbps and downstream speeds of up to 7Mbps. RADSL uses ADSL technology but enables the transmission rate to vary for different types of communications, such data, multimedia, and voice. |
|
|
Term
SDSL
Symmetric Digital Subscriber line |
|
Definition
| A form of digital subscriber line technology that is often used for videoconferencing or online learning. It offers a transmission speed of 384Kbps for upstream and downstream communications. |
|
|
Term
SHDSL
Symmetric High Bit Rate Digital Subscriber Line |
|
Definition
| Also called G.shdsl, a DSL technology that can be transmitted over one or teo wires and that can reach up to about 4 miles (over two wires). the upstream and downstream rates are up to 1.54Mbps. |
|
|
Term
| Synchronous Communication |
|
Definition
| Communications of continuous bursts or blocks of data controlled by a clock signal that starts each burst or block of data. |
|
|
Term
|
Definition
| A digital modem that permits computer to computer data transfer over a digital line, such as ISDN. |
|
|
Term
UART
Universal Asynchronous Receiver Transmitter |
|
Definition
| An electric chip that handles data flow through a serial port or modem. |
|
|
Term
UUCP
UNIX to UNIX Copy Protocol |
|
Definition
| A protocol used by UNIX computers for communicating through modems. UUCP can also be used on networks, but for these applications, it is usually replaced by the faster TCP/IP technology. |
|
|
Term
VDSL
Very High Bit Rate Digital Subscriber line |
|
Definition
| A digital subscriber line technology that works over a coaxial and fiber optic cables, yielding up to 85Mbps downstream and upstream communications |
|
|
Term
|
Definition
| A software driven modem that uses minimal hardware and the computer's CPU with software to conduct data communications. |
|
|
Term
| Wireless Network Adapator |
|
Definition
| A digital device designed to provide wireless internet access. Also know as a wireless modem or wireless internet card. |
|
|
Term
|
Definition
| A software flow control protocol that permits a receiving modem to notify the sending modem that its data buffers are full and it needs more time to process previously received data. |
|
|
