Specifications

MBG Engineering Guidelines, Release 8.0

GLOSSARY

APC Application Processor Card

ATM Asynchronous Transport Mode. A switching protocol that uses asynchronous time-division

multiplexing (TDM) to put data into fixed-size cells. It is suitable for carrying real-time payloads

such as voice and video.

AWC Audio Web Conferencing (See MCA)

CCS Centum Call Seconds. A unit of measurement used in traffic and queuing theory calculations that is

equal to 100 seconds of conversation. One hour of telephone traffic on one line is equal to 36

CCS, which is equal to one erlang (a more common measurement).

CPH Calls Per Hour

CRE Call Recording Equipment

CSR Certificate Signing Request

DHCP Dynamic Host Configuration Protocol (RFC 1541)

DMZ De-Militarized Zone. A portion of a network which is behind a firewall but has elements that are

exposed to the Internet.

DSL Digital Subscriber Line

Erlang A unit of traffic density in a telecommunications system. One erlang is the equivalent of one call

(including call attempts and holding time) in a specific channel for 3600 seconds in an hour. It is

equal to one hour of conversation, or 36 CCS.

G.711 ITU-T codec audio standard, specifying an audio signal with a 3.4 KHz bandwidth (ordinary analog

voice signal) over an A-law and μ-law digitized, linear PCM at 64Kbps. In G.711, encoded voice is

already in the correct format for digital voice delivery in the PSTN or through PBXs.

G.729 This ITU-T standard describes CELP compression where voice is coded into 8-Kbps streams. The

two variations of this standard (G.729A and G.729A Annex A) differ mainly in computational

complexity; both provide speech quality similar to 32-Kbps ADPCM.

ICP IP Communications Platform

IETF Internet Engineering Task Force. The official specification documents of the Internet Protocol suite

are defined by the Internet Engineering Task Force (IETF) and the Internet Engineering Steering

Group (IESG ). These specifications are recorded and published as standards track RFCs. (See

RFC).

IP Internet Protocol (RFC 1122 Section 3.)

IPSec Internet Protocol Security