AT&T DS1/DMi/ISDN-PRI manual Awg, B8ZS

GLOSSARY GL-3

AWG

bandwidth

baud

bit rate

bits per second (bps)

B8ZS

B-channel

B-channel cut- through

BCCOS

BCCOS — unknown analog

BCCOS — unknown digital

bearer capability

bearer capability class (BCC)

bearer capability class of service (BCCOS)

bearer- capability routing

See American Wire Gauge.

The difference, expressed in hertz, between the highest and lowest frequencies in a range of frequencies that determine channel capacity.

In telecommunications applications, a unit of transmission speed equal to the number of signal events per second. See also bit rate and bits per second.

The speed at which bits are transmitted, usually expressed in bits per second. Also called data rate. See also baud and bits per second.

The number of binary units of information that are transmitted or received per second. See also baud and bit rate.

See bipolar with 8-zero substitution.

For an Integrated Services Digital Network (ISDN), a 64K-bps channel accompanied by timing that is intended to carry a wide variety of digital information streams, such as voice at 64K-bps, data at up to 64K-bps, wideband voice encoded at 64K-bps, and voice at less than 64K-bps, alone or combined with other digital information streams. Also called bearer channel. See also D-

channel and B-channel cut-through.

The side, either user or network, of the Integrated Services Digital Network basic rate interface (ISDN-BRI) that the specified B-channel uses to transfer voice or data information. See also B-channel.

See bearer capability class of service.

An incoming call that is assumed by the communications system to be either voice or voice-grade data.

An incoming call that is assumed by the communications system to be either mode 0, mode 1, mode 2, or mode 3.

A term used with Integrated Services Digital Networks (ISDNs) to identify the kinds of service that are requested or are available for a call. See also bearer-

capability class.

A term used with Integrated Services Digital Networks (ISDNs) to identify the kind of trunk service required for a call. See also bearer capability and bearer-

capability routing.

A term used with Integrated Services Digital Networks (ISDNs) to identify a number that specifies call routing requirements transmitted within the bearer capability (BC) information element (IE). All line ports, each trunk group, and all Automatic Alternate Routing/Automatic Route selection (AAR/ARS) preferences have individual BCCOS number assignments. The same BCCOS number may be shared by lines, trunk groups, and AAR/ARS preferences. See also bearer capability and class of service.

A method provided by bearer-capability classes (BCCs) for specialized routing of various trunk services using Integrated Services Digital Network primary rate interface (ISDN-PRI) and non-ISDN endpoints. See also bearer-capability

class.