IAX Settings

The IAX configurations require professional knowledge of IAX protocol, incorrect configuration may cause calling issues on the IAX extensions and IAX trunks.

IAX General Settings

Option Description
UDP Port IAX registration port.
Bandwidth Control which codecs to be used based on bandwidth.
Maximum Registration/Subscription Time Maximum duration (in seconds) of an IAX registration.
Minimum Registration/Subscription Time Minimum duration (in seconds) of an IAX registration.

IAX Codec

A codec is a compression or decompression algorithm that used in the transmission of voice packets over a network or the Internet.

Yeastar S-Series VoIP PBX supports G711 a-law, u-law, GSM, H261, H263, H263P, H264, SPEEX, G722, G726, ADPCM, G729A, MPEG4 and iLBC.

  • You need to choose at least one same code on the PBX and on your phones, or there may be a problem of the call.
  • If you want to make video calls, you need to select H261, H263, H263P, H264 or MPEG4 codec on the PBX and on your phones.