AMR Codec

AMR (Adaptive Multi-Rate) is an audio codec, optimized for speech coding that encodes narrowband (200–3400 Hz) signals at variable bit rates ranging from 4.75 to 12.2 kbit/s with toll quality speech starting at 7.4 kbit/s. AMR was adopted as the standard speech codec by 3GPP in October 1999 and is now widely used in GSM and UMTS. It uses link adaptation to select from one of eight different bit rates based on link conditions.

As part of SIP/IMS support, you can have millions of audio sessions between peers with audiuo codec as AMR (NB/WB).

For more information please please contact support team.