Title :
Incorporating voice telecommunication with VSATs
Author :
Chin, Michael P. ; Horne, Karl
Author_Institution :
AT&T Bell Labs., USA
Abstract :
To meet a growing need for voice telecommunication over VSATs, AT&T Tridom and AT&T Bell Laboratories developed the voice link module (VLM). By utilizing state of the art code excited linear prediction (CELP) compression techniques, the VLM is able to compress the voice signal down to 8 kbits/second or 4.8 kbits/second with a slight degradation in voice quality. The voice compression is combined with a flexible interface that supports two lines which may be configured for station or office connections. In addition, network software was added to support routing of the calls based on DTMF or dial pulse (DP) dialing. The combination of the high quality voice compression, flexible interface, and network software produced a unit that almost transparently supports voice telecommunication over VSAT circuits
Keywords :
VSAT networks; data compression; linear predictive coding; speech coding; telecommunication network routing; telephone equipment; voice communication; 4.8 kbit/s; 8 kbit/s; AT&T Bell Laboratories; AT&T Tridom; CELP; DTMF; VSAT; VSAT circuits; VSAT networks; call routing; code excited linear prediction; compression techniques; dial pulse dialing; network software; office connections; station connections; telephone interface; voice link module; voice quality; voice signal compression; voice telecommunication;
Conference_Titel :
Digital Satellite Communications, 1995., Tenth International Conference on
Conference_Location :
Brighton
Print_ISBN :
0-85296-635-0
DOI :
10.1049/cp:19950070
