Deep Submergence Unit

See Digital Service Unit (DSU).

direct support unit

A CPE component which interfaces to a digital circuit such as T1 or Switched 56. DSU performs conversion of data stream to bipolar format for transmission. Generally used (or combined) with a CSU.

Detection Supply Unit

Designated State Unit (for vocational rehabilitation). In Wisconsin, the DSU is the Division of Vocational Rehabilitation.

The abbreviation for Digital Services Unit, DSU replaces the modem's asynchronous connections to the Internet.

Deficit Spending Unit. An economic unit - household, business or government agency - whose expenditures exceed its income or revenues.

A piece of equipment that converts digital signals from data terminal equipment to a type that can be transmitted through a digital phone line. A DSU typically sits between a 56Kbps or T1 digital circuit and computer(s) to allow data communication over a point-to-point circuit. Used in conjunction with Point-to-Point Services (sometimes also called a private line). Click here for more information about 56k Point-to-Point Services or T1 Point-to-Point Services. [Back to Glossary Table of Contents

Data Service Unit. A device used in digital transmission for connecting data terminal equipment (DTE).

Acronym for Data Service Unit, a DCE used with digital communications circuits to provide digital data services interface. Located on the users premises, the DSU interfaces directly with the DTE, and provides loop equalization, remote and local test capabilities, and the logic and timing necessary to provide a standard EIA/TIA or CCITT interface. Converts signals between those used at the DTE's serial interface and bipolar signals used on the digital network. Also Network Terminal Unit (NTU).

The abbreviation for Digital Services Unit, DSU replaces the modem in synchronous connections to the Internet.

A digital interface device that converts the physical interface on any data terminal equipment to the digital transmission signal. Often combined with a Channel Service Unit to make CSU/DSU.

Data Service Unit. Simplified modem for the transmission of digital data over a private line or for limited distance communications over the PSTN, where it is not necessary to comply with all the requirements for a high speed modem.

Data Service Unit, a physical cable interface on a network link.

Digital Service Unit. A type of customer premises equipment that terminates a single DSO or fractional T1.

Data transmission equipment used to interface to a digital circuit at customer site. It converts the customer's datastream, such as X.21 to E1 or T1 for transmission through the CSU, which is often contained, functionally within the DSU device. DSUs can convert data to or from a native port on a router to an E1, E2 or E3 leased line, primary rate ISDN or SMDS, DSU functionality can be built into devices such as some routers or multiplexers. In Europe a DSU can convert El bandwidth into RS.449, X.21, V.35 or other serial interface via a router. A DSU with an HSSI interface will deliver E2 or E3 bandwidth from the WAN to an HSSI router on a LAN.

Data Service Unit - A digital interface device that connects end user data communications equipment to the digital access lines, and which provides framing of sub-64Kbps customer access channels onto higher rate data circuits. A DSU may be combined with a CSU into a single device called a CSU/DSU. E-Rate - Program of the Universal Service Administrative Company (USAC) offering financial assistance to schools and libraries technology programs. For more information: http://www.sl.universalservice.org

a customer premises device that frames, formats the data into channels and converts the binary data to bipolar format for transmission on the digital network.

Digital Service Unit. Digital device at customer premises to facilitate xDSL service. Also known as a Modem or Router.

A DSU provides the interface between the Data Terminal Equipment (DTE) and the Channel Service Unit (CSU) when a network is connected to a Digital Data Service (DDS). The DSU's primary functions are to properly convert a DTE's output signals to the format required by the DDS and to provide control signaling.

Data service unit. "A device that transmits digital data on transmission facilities. Typically

Digital Service Unit. A user device for interfacing to a digital circuit such as DDS or T1 when combined with a CSU. The DSU converts the user's data stream to bipolar format for transmission.

Data Service Units. DSUs are channel service units (CSI's). Data service units (DSUs) are required in order to connect digital customer premises equipment (CPE ) to their carrier networks. They are hardware devices that provide an interface between a digital line and the unit of data terminal equipment. DSUs provide transmit and they receive control logic, synchronization and also timing recovery across the data circuits. DSUs may also act in converting ordinary binary signals that are generated by CPE to special bipolar signals. These bipolar signals are specifically designed to facilitate transmission at upto 1.544 Mbps rates over (UTP) cable which is a media originally intended for voice bandwidth signals(3 kHz) . See Channel Service Units (CSU).

ata ervice nit. A device used to transmit digital data on digital transmission facilities. See also CSU.

Data Service Unit (Unit on watch of Data) Equipment in the end user who acts like an interface between services of low speeds and circuits of more high speed. E-e

Digital Service Unit A network interface device between the CSU and the customer's DTE. Usually associated with a CSU, the DSU has a V.35, RS232, RS449, or other interface to the customer equipment. The DSU is also a multiplexer for FT1 circuits.

Data Service Unit. Provides a DTE with access to digital telecommunications facilitites.

Digital Service Unit, a modem like device that provides the interface between a customer and the telephone data service provider, unlike a modem this device is digital in its operation, that is transmitting 1's and 0's directly, typically at rates lower than T1

Data Service Unit, converts the synchronous digital signal from the user's equipment (PC, router, etc.) to a T-Carrier bipolar signal.

data service unit. A customer-owned, physical layer device that terminates an access line, such as a T1, form the network. The customer's mirror image of a central office repeater. Traditionally, DSUs were network equipment used in conjunction with customer-owned CSUs to terminate access lines. See channel service unit.

See data service unit.

Data service unit. A device used in digital transmission that adapts the physical interface on a DTE device to a transmission facility such as T1 or E1. The DSU is also responsible for such functions as signal timing. DSU is freqnetly coupled with a CSU (see above) as CSU/DSU.

Data Service Unit (DSU): A device that connects DTE to digital communications lines. A DSU formats the data for transmission on the public carrier WAN, and ensures that the carrier's requirements for data formats are met.

Data service unit. Device used in digital transmission that adapts the physical interface on a DTE device to a transmission facility, such as T1 or E1. The DSU also is responsible for such functions as signal timing. Often referred to together with CSU as CSU/DSU.

(Data Service Unit) A device that transmits data over digital circuit (DDS or T1); combined with a CSU (Channel Service Unit).

Abbreviation for disk storage unit.

Data Service Unit. A customer premises device that is used to interface to a digital circuit (DDS or T I when combined with a CSU). The DSU performs conversion of a customer's data stream to bipolar format for transmission.

Digital Service Unit. Data communications equipment that transmits digital data over a private line.

The interface between a user's data DTE device and a digital data service.

Data service unit. A device used to connect a DTE to a digital phone line. DSU converts digital data from a router to voltages and encoding required by the phone line. See also CSU/DSU.

A synchronous serial data interface that buffers and controls the flow of data between a digital terminal and the CSU attached to a digital communications facility, converting between incompatible digital formats. DSUs can be considered as modem replacements in digital networks.