Fancy Gap HTRN

Voice Trunking Calculator

Phones Erlang Codec Phone profile 1 G.729A (CS-CELP) 8kbps compression G.711 (PCM) 64kbps uncompressed G.723.1 (ACELP) 5.3kbps compression G.723.1 (MP-MLQ) 6.4kbps compression G.726 (ADPCM) 32kbps compression G.728 (LD-CELP) 16kbps compression Phone profile 2 G.729A (CS-CELP) 8kbps compression G.711 (PCM) 64kbps uncompressed G.723.1 (ACELP) 5.3kbps compression G.723.1 (MP-MLQ) 6.4kbps compression G.726 (ADPCM) 32kbps compression G.728 (LD-CELP) 16kbps compression Phone profile 3 G.729A (CS-CELP) 8kbps compression G.711 (PCM) 64kbps uncompressed G.723.1 (ACELP) 5.3kbps compression G.723.1 (MP-MLQ) 6.4kbps compression G.726 (ADPCM) 32kbps compression G.728 (LD-CELP) 16kbps compression Phone profile 4 G.729A (CS-CELP) 8kbps compression G.711 (PCM) 64kbps uncompressed G.723.1 (ACELP) 5.3kbps compression G.723.1 (MP-MLQ) 6.4kbps compression G.726 (ADPCM) 32kbps compression G.728 (LD-CELP) 16kbps compression Phone profile 5 G.729A (CS-CELP) 8kbps compression G.711 (PCM) 64kbps uncompressed G.723.1 (ACELP) 5.3kbps compression G.723.1 (MP-MLQ) 6.4kbps compression G.726 (ADPCM) 32kbps compression G.728 (LD-CELP) 16kbps compression Phone profile 6 G.729A (CS-CELP) 8kbps compression G.711 (PCM) 64kbps uncompressed G.723.1 (ACELP) 5.3kbps compression G.723.1 (MP-MLQ) 6.4kbps compression G.726 (ADPCM) 32kbps compression G.728 (LD-CELP) 16kbps compression Total Blocking Ratio Total Trunks   Estimated BW (kbps)      Voice Trunking calculation Calculates the number of trunks and estimated VoIP bandwidth required to support the total erlangs in a site using using Erlang B The total is comprised of up to 6 calling profiles and the associated codecs. An erlang is essentually the percentage of an hour a phone is active. A value of .2-.3 are common values. More active phones would have a higher erlang. Bandwidth is estimated by averaging the individual profiles erlangs against the total erlangs. Keep in mind the peak could always be higher. When calculating the bandwidth the following values are used:  Bandwidth (kbps)   Codec   26.8   G.729A (CS-CELP) 8kbps compression   82.8   G.711 (PCM) 64kbps uncompressed   17.9   G.723.1 (ACELP) 5.3kbps compression   18.9   G.723.1 (MP-MLQ) 6.4kbps compression   50.8   G.726 (ADPCM) 32kbps compression   28.5   G.728 (LD-CELP) 16kbps compression  The Blocking ratio is the number of calls that would be blocked. .01 is 1 call in a hundred.