Digital Link DL3100 Betriebsanweisung PDF herunterladen (Seite 149)

Glossary G-3

CCITT

International Telegraph and Telephone Consultative Committee.

central ofÞce (CO)

The phone company switching facility or center; usually a Class 5 end ofÞce, at

which subscribers' local loops terminate.

channel

A physical or logical path allowing the transmission of information; the path

connecting a data source and receiver.

circuit

Generally referring to a transmission medium connecting two or more

electronic devices.

clear channel

A characteristic of a transmission path or digital circuit in which the full

bandwidth is available to the user. The phone company does not use any

portion of the bandwidth for framing or control bits.

clock

An oscillator-generated signal providing a timing reference for a transmission

link; used to control timing functions such as sampling interval, signaling rate

and duration of signal elements.

code conversion

The process of changing the bit grouping for a character in one code into the

corresponding bit grouping for the character in another.

CMI (Control Mode Idle)

The process of changing the grouping for a character in one code into the

corresponding bit grouping for the character in another.

communications port (Comm Port)

The electrical interface between a unit and the operatorÕs terminal. Operator

commands and responses can be communicated through the Comm Port.

connector

A physical interface, such as DB-15 or RS-232-C, typically with male or female

components.

CPE (Customer Premises Equipment)

Equipment that interfaces the telephone network and physically resides at the

user's location.

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Digital Link DL3100 Betriebsanweisung Seite 149