ADTRAN 810 Plus manual Dedicated bandwidth

Appendix E. Glossary

bps

Bits per second. A measure of the speed of data communications.

byte

Eight bits of information composed of zeros or ones, one of which may include a parity bit.

BRI

Basic Rate ISDN. An ISDN service that offers two bearer (B) channels. One channel (64 kbps) is used for data transfer and as a data-link. The second channel (16 kbps) is used for signaling and control information.

clocking

An oscillator-generated signal that provides a timing reference for a transmission link. A clock pro- vides signals used in a transmission system to control the timing of certain functions. The clock has two functions, (1) to generate periodic signals for synchronization and (2) to provide a time base.

CPE

Customer premise equipment. All telecommunications terminal equipment located on the customer premises, including telephone sets, private branch exchanges (PBXs), data terminals, and customer- owned coin-operated telephones.

CSU

channel service unit. A device that functions similarly to a modem except that the CSU works with digital signals rather than analog signaling.

CS

See CTS.

CTS

Clear to send. A signal on the DTE interface indicating that the DCE is clear to send data.

DACS

Digital Access Cross-Connect System. A system, such as the ATLAS 800, that assigns and redistributes (grooms) any DS0 on any T1 circuit to any other DS0 on any other T1 circuit in the system.

DCE

Data communications equipment. The part of a computer or data terminal that connects to a commu- nications channel or network.

D channel

delta channel. Controls the operation of the ISDN connection.

dedicated bandwidth

Bandwidth which has been set aside (dedicated) for a specific number.

Dial plan

The numbering plan for ATLAS ports dial plans contain phone number and

(user and network) handling switched connections. Individual features associated with DTMF dialing, PRI and BRI.

Digital Access Cross-Connect System

See DACS.

E-2 ATLAS 810PLUS User Manual 61200266L1-1