MyPBX SOHO Administrator Guide
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each other directly, bypassing the system. It is not always possible for the system to
negotiate endpoint-to-endpoint media routing.
3) Codecs
Figure 6-61
A codec is a compression or decompression algorithm used in the transmission of voice
packets over a network or the Internet.
u-law:
A PSTN standard codec, used in North America, which 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, which 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.722:
G.722 is a wideband speech coding algorithms which supports the bit rate of 64, 56
and 48kbps wideband. It’s a broadband voice encoding of G series.
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, MPEG4
.
Note:
If you would like to use G.729, please enter your license.
Summary of Contents for MyPBX-SOHO
Page 1: ...MyPBX SOHO Administrator Guide Version 70 19 0 23 Yeastar Information Technology Co Ltd...
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Page 86: ...MyPBX SOHO Administrator Guide 86 204 Figure 6 43 Queue Name A name for the Queue...
Page 132: ...MyPBX SOHO Administrator Guide 132 204 Figure 9 5...
Page 142: ...MyPBX SOHO Administrator Guide 142 204 Figure E 2 Step3 Finish...
Page 146: ...MyPBX SOHO Administrator Guide 146 204 Figure F 3 APPENDIX G How to Use BLF Key to Choose the...
Page 179: ...MyPBX SOHO Administrator Guide 179 204 Figure I 5...
Page 188: ...MyPBX SOHO Administrator Guide 188 204 Figure I 17...
Page 199: ...MyPBX SOHO Administrator Guide 199 204 Figure I 35 Service provider trunk P P...
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