1. Configuration Guide
  2. Transcoding
  3. AMR-NB and AMR-WB Specifications

AMR-NB and AMR-WB Specifications

The Oracle® Enterprise Session Border Controller supports Adaptive Multi-Rate Narrow Band & Wide Band codecs. All configurations of this codec, as indicated by SDP, are transcodable except when the following SDP parameters are enabled:

  • robust-sorting
  • interleaving
  • CRC

When AMR is configured in a codec policy’s add-codecs-on-egress parameter, it is forwarded from the Oracle® Enterprise Session Border Controller with the following default settings:

  • 12.2 kbps (AMR-NB)
  • 23.85 kbps (AMR-WB)
  • RTP/IF1 format
  • No redundant packets
  • bandwidth efficient default payload
  • No CRC frame
  • 20ms default ptime