Belgacom 500 Codecs, DirectSound, Dynamic Jitter Buffer Adjustment, RAS Remote Access Server

4Abbreviations and Terminology

Codecs:

Compression (and decompression) of audio data, in real time, before transportation via the Internet Protocol, thus reducing net- work load.

DirectSound:

Application programming interface developed by Microsoft for controlling the sound card. Makes it possible to simultaneously output the audio data of multiple applications.

Dynamic Jitter Buffer Adjustment:

Smooths out delays caused by varying network utilisation, that can occur during transportation of real-time audio data via the Internet Protocol.

RAS (Remote Access Server):

Makes the creation of a network connection via a modem, ISDN or DSL possible.

RTP / RTCP (Real Time Protocol / Real Time Control Protocol):

Protocols for transporting real-time audio data via the Internet Protocol.

Skin:

Interchangeable graphical user interface.

TAPI (Telephony Application Programming Interface):

A programming interface developed by Microsoft and Intel for telephony applications that use Microsoft Windows.

TSP (TAPI Service Provider):

Hardware-dependent driver module providing TAPI functionality for specific devices (e.g. for the Forum 500).

VAD (Voice Activity Detection):

Recognizes speech pauses that are then not sent so as to reduce network load.

General Information