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Test your internet connection speed for FonoSIP.com (free)


Bandwidth Requirements for Several Common VoIP Compression Algorithms
Codec Codec Bit Rate (Kbps) Nominal Ethernet Bandwidth (Kbps)
G.711 64 87.2
G.729 8 31.2
G.723.1 6.4 21.9
GSM 13.2 29.2
iLBC 13.3 27.7
G.723.1 5.3 20.8
G.726 32 55.2
G.726 24 47.2
G.728 16 31.5

NOTE: VoIP codecs require the listed amount of bandwidth upstream and downstream

NOTE2: If you have enough bandwidth, but you experience low voice quality make sure:

  • Your local internet connection is not congested by a large file download
  • Your SIP phone is configured to use codec G729 as priority one

    more information about codecs

    link to a more detailed free bandwidth meter (non java as the one above)

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    FonoSIP.com supports Xten / Counterpath SIP softphones for Windows, Mac, iPhone and Linux. Internet telephony equipment such as Linksys PAP2, Cisco, Sipura, Nokia N71. Apple iPhone, iPod Touch, iPad. Android. Codec G729. Fring Mobile. Bring your Own Device BYOD. We also support SIP Trunking, replace your phone lines. Asterisk PBX, TrixBox.