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The PBX makes various codecs available. The selection of a codec affects
the quality of a VoIP call. Different codecs can be configured, depending on
the available connection bandwidth, ranging from codecs with the best
possible VoIP call quality down to codecs with high compression (low
bandwidth). The codec actually used for a call is not fixed until the codec is
negotiated with the VoIP provider.
Best available quality
Selects a codec sequence with best possible VoIP call quality (high
bandwidth) as highest priority.
Good compromise
Selects a compromise between VoIP call quality (high bandwidth) and
compression (lower bandwidth) for the codec sequence.
Best possible compression
Selects a codec sequence with stronger compression (lower bandwidth) as
highest priority.
Notes:
The preset codec sequence can be changed manually if necessary.
If using a codec with high bandwidth (e.g. G.711) causes too much
negative impact on the call quality, it may be that there is not enough
connection bandwidth. If the call quality is impacted frequently, it is a
good idea to only select codecs with lower bandwidths in the Codec
settings priority list.
COMmander 6000/R/RX - Firmware V7.0D - Advanced Information V19 04/2018
Settings – Public switched tel. networks
Voice over IP (VoIP)
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