HorizonTraining
Video Training for Basic Operation of Polycom Devices on the Gamma Horizon Network
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How to Use Integrator and update company directory
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Call Quality for VoIP calls on Gamma Horizon Network
The Codec in the phone converts speech from the handset to a digital format (IP packets) and vice versa. You will
need to ensure that the maximum number of simultaneous incoming and outgoing calls does not exceed the
bandwidth/codec combination arranged by your Communications Supplier.

Bandwidth estimate for various codecs are:
• G.729 codec - 30 to 50 kb/s depending on contention ratio of broadband service.
• G.711 codec – 90 to 150kb/s depending on contention ratio of broadband service.
• G.722 codec. This can only be used on external calls if the other phone in the call can support G.722. 

Please note that if the wrong Codec is selected and there is not enough bandwidth available you may
encounter poor quality external calls over all calls from your site
Training Manuals for Basic Operation of the Gamma Horizon Network
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