G100 User Manual
G100 User Manual
Page 25 of 31
(5) Audio settings
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Type of codec:
Set coder/decoder (codec) type of the phone by selecting an
option from the drop down list. The options are g.729, g.723.1, g.711u, g.711a and
auto. “auto” is suggested ! If “auto” is selected, the IP phone will negotiate with the
logon server which algorithm is best for incoming and outgoing calls. As the
correct selection is determined for each call, optimum compatibility with any kind
of hardware or software IP phones is guaranteed with the “auto” option.
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Number of audio frames:
Set number of audio frames in RTP package. If
G.723 audio codec used, set this value to 1; while for the G.729 audio codec, 2 is
the optimum value. Minimum is 1 and maximum is 8.
Audio settings
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Voice activity detection (VAD):
Enable/disable VAD (voice activity detection)
by checking/unchecking this box. Bandwidth is lower if this checkbox is in
checked state, but compatibility is better if not checked.
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Automatic gain control (AGC):
Enable/disable AGC of microphone gain by
checking/unchecking this box.
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Echo cancellation (AEC):
Enable/disable AEC by checking/unchecking this
box.
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G.723.1 high data rate:
If the G.723.1 codec is selected, enable/disable
G.723.1 high rate by checking/unchecking this option.
Volume settings
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Microphone:
The value entered here represents the microphone gain (0: