MyPBX Standard User Manual
www.yeastar.com
Page 73
·
Bandwidth
Low/medium/high with this option you can control which codec to be used.
·
Min Registration Time
Minimum duration (in seconds) of a IAX2 registration. Default is 60 seconds.
·
Max Registration Time
Maximum duration (in seconds) of a IAX2 registration. Default is 1200 seconds.
2
)
Codecs
A codec is a compression or decompression algorithm that used in the
transmission of voice packets over a network or the Internet.
u-law:
A PSTN standard codec, used in North America, that provides very
good voice quality and consumes 64kbit/s in each direction (receiving and
transmitting) of a VoIP call.
a-law:
A PSTN standard codec, used outside of North America, that
provides very good voice quality and consumes 64kbit/s in each direction
(receiving and transmitting) of a VoIP call.
GSM:
A wireless standard codec, used worldwide, that provides adequate
voice quality and consumes 13.3kbit/s in each direction (receiving and
transmitting) of a VoIP call. GSM is supported by many VoIP phones.
SPEEX:
Speex is an Open Source/Free Software patent-free audio
compression format designed for speech. The Speex Project aims to lower
the barrier of entry for voice applications by providing a free alternative to
expensive proprietary speech codecs. Moreover, Speex is well-adapted to
Internet applications and provides useful features that are not present in
most other codecs.
G.726:
A PSTN codec, used worldwide, that provides good voice quality and
consumes 32kbit/s in each direction (receiving and transmitting) of a VoIP
call. G.726 is supported by some VoIP phones.
ADPCM, G.729A, H261, H263, H263p, H264
.
Note:
If you would like to use G.729, please enter your license.
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