T-Comfort Comfort Pro S, Руководство по монтажу и пусконаладке

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Voice over IP (VoIP) Media Gateway (MGW)
Media Gateway (MGW)
The Media Gateway transforms VoIP voice data into PCM audio data. This function converts voice data
between VoIP telephones and all other terminal types. Without the Media Gateway, VoIP telephones can only
exchange call data directly with other VoIP telephones. Media Gateway functionality is also required for
producing dial tones and making external phone calls with a VoIP telephone.
A Media gateway card makes 8 channels available. One Media gateway channel should be available for a
maximum of 3 VoIP terminals. The Media Gateway also takes over the routing function for external SIP
connections, making 8 external SIP connections possible.
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Software MGW
The system software for Comfort Pro S provides a Media Gateway function. Depending on the system
processor utilisation and available system memory up to 32 MGW additional channels may be available.
The Media Gateway function provided by the system software has the following features:
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Up to 32 channels can be used simultaneously.
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The MGW channels are not compressed, so only the G.711 codec is available.
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There is no echo suppression.
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Voice quality may be reduced during high system utilisation.
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Q.SIG-IP and SIP are not possible.
For optimal call quality and high availability, you should consider using a MGW interface card (see also MGW
Interface Card starting on page 103).
The Media Gateway function (“Software MGW”) is used preferably for connections with the G.711 codec -
even if a MGW interface card is installed. Activate the MGW card (G.711) prefer checkbox in the Telephony :
Settings menu.