Polycom SoundStructure C16 Design Manual page 96

level_pre and level_post Input and Output Processing for Telephony Channels
Phone In
Channel
To Telco
from Matrix
From Telco
to Matrix
Using Conference Link Channels
The Conference Link channels for Codec Program Audio in and Codec Video Call In have a level_pre
and level_post, as shown on the following figure. The Codec Voice In and Codec UI Audio In channels
do not have level_pre or level_post meters as those signals are available directly at the matrix and do
not have any input processing on a SoundStructure device.
Polycom, Inc.
Telephony Processing
Dynamnics Parametric
Processing Equalization
Tone
Generator
Parametric Dynamics
Fader
Equalization Processing Gain Control
Call Progress
level_post
level_post
Delay Fader
Converter
Line Echo
Cancellation
Automatic Noise
Cancellation Converter
Detection
Output to
D/A
Analog
PSTN Line
Gain
A/D Input from
Analog
PSTN Line
Gain
level_pre
Phone Out
Channel
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