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Phone Guides

Review codec policy and transcoding load

A codec policy can drift when phones, trunks or firmware change. Review the live offer on a sample call, not only the saved policy document.

Compare the legs

  • Check the codec negotiated between endpoint and PBX, then between PBX or SBC and carrier.
  • Record where transcoding occurs and whether its capacity is adequate at busy-hour call volume.
  • Confirm that packetisation and bandwidth estimates still match the approved link plan.

Sample a route with a remote site or mobile client if those paths use a different codec. Record the tested path, date and software versions. If the policy changed without approval, assign a review rather than silently copying the new settings into the documentation.

Use the voice codecs guide when comparing the supported options.