Skip to end of metadata
Go to start of metadata

Codecs

The following codecs are supported:

CodecModelsFirmwareBitrateSampling RateNotes

G.711 a-law

A20, A22, A25, A30All released firmware64000 bps8kHz, Narrowband 
G.711 u-lawA20, A22, A25, A30All released firmware64000 bps8kHz, Narrowband 
G.726A20, A22, A25, A30All released firmware32000 bps8kHz, Narrowband 
iLBC, 30msA30All released firmware13333 bps8kHz Narrowband 
OpusA30All released firmware12000 bps8kHz NarrowbandOnly one channel is supported at a time. Users should enable at least one other codec when using Opus to allow three-way calling.
G.729aA20, A22, A25, A30All released firmware8000 bps8kHz, Narrowband 
G.722A20, A22, A25, A30All released firmware64000 bps16kHz, Wideband 
OpusA30All released firmware20000 bps16kHz, WidebandOnly one channel is supported at a time. Users should enable at least one other codec when using Opus to allow three-way calling.

In order to limit MTU size for UDP-based SIP signaling, Digium phones only enable a limited subset of these codecs by default.  Use of some codecs may require enabling them, which can be done via web UI or remote configuration files.

  • No labels