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VoIP Protocols |
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¿How does VoIP works?
VoIP works with three main protocols called SIP, H.323 and IAX. They have some advantages and weak points.
You can know how they work with a graphic example of each protocol in a setup and disconnect operation.
Or you can compare them: SIP vs H.323 Comparative or
SIP vs IAX Comparative
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PBX installation and configuration |
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Asterisk is an open-source software implementation of a PBX (Private branch exchange).
Asterisk can be installed under windows OS (Asterisk for windows) or can also be installed under linux OS (Asterisk for linux). You can find all the information in information about Asterisk
3CX is another commercial PBX on WIndows that you can use for the same purpose. You have all the information about this PBX at 3CX PBX
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New VoIp codecs |
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We have added to our website a new section with some VoIP codecs that are being used.
For example,
G 721.1, G729.1 y G.722.2 versions. In general all the changes try to get an audio bandwidth of 50 Hz to 7 kHz in order to provide acceptable music quality.
In addition, you can take a look to G.711 codec process to learn how a codec is built and then compare the audio samples to note how the voice quality is lower as the bandwith is reduced. |
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