AMR-NB and AMR-WB Specifications
The Oracle Communications 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 Communications 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