On 8 April 2014 20:34, Tusker 21 <tusker212@gmail.com> wrote:
@Wash 1 number 2 extensions, i wonder if a 512 MB link from safaricom is sufficient for VOIP calls. approx how much MB do you need for an excellent VOIP call?

R,
T21

​You only need from 11kbps to about 128K (one way) to make a VOIP call depending on codecs in use (including overheads). 

Talk to me on competitive international rates/voip/ippbx setup and SIP/iax2 peering.

​Search no further.​ 

See below sampled... You certainly would use g729/g723 to save alot and still maintain quality (not CD quality)
  • BroadVoice Codec 16Kbps narrowband, and 32Kbps wideband
  • DoD CELP - 4.8 Kbps
  • GIPS Family - 13.3 Kbps and up
  • GSM - 13 Kbps (full rate), 20ms frame size
  • iLBC - 15Kbps,20ms frame size: 13.3 Kbps, 30ms frame size
  • ITU G.711 - 64 Kbps, sample-based Comes in two flavors: A-law and mu-law
  • ITU G.722 - 48/56/64 Kbps ADPCM 7Khz audio bandwidth
  • ITU G.722.1 - 24/32 Kbps 7Khz audio bandwidth (based on Polycom's SIREN codec)
  • ITU G.722.1C - 32 Kbps, a Polycom extension, 14Khz audio bandwidth
  • ITU G.722.2 - 6.6Kbps to 23.85Kbps. Also known as AMR-WB. CELP 7Khz audio bandwidth
  • ITU G.723.1 - 5.3/6.3 Kbps, 30ms frame size
  • ITU G.726 - 16/24/32/40 Kbps
  • ITU G.728 - 16 Kbps
  • ITU G.729 - 8 Kbps, 10ms frame size
  • LPC10 - 2.5 Kbps
  • Speex - 2.15 to 44.2 Kbps

​

Kind Regards,
Wilson./