Polycom SoundStructure C8 User Manual

Design Guide for the Polycom SoundStructure C16, C12, C8, and SR12
5 - 18
Telephony leve_pre and level_post
For telephony channels, the level_pre and level_post for the phone input chan-
nel and level_post for the phone output channels are shown in the following
figure. As with the analog input and output channels, the level_pre is before
any processing and the level_post is after the processing.
Conference Link Channels
The Conference Link channels for HDX Program Audio in and HDX Video
Call In have a level_pre and level_post as shown on the following figure. The
HDX PSTN In and HDX 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.
Phone In
Channel
Phone Out
Channel
Fader
Tone
Generator
A/D
Converter
Analog
Gain
D/A
Converter
Analog
Gain
Input from
PSTN Line
Output to
PSTN Line
From Telco
to Matrix
To Telco
from Matrix
Noise
Cancellation
Parametric
Equalization
Dynamnics
Processing
FaderDelay
Line Echo
Cancellation
Call Progress
Detection
Automatic
Gain Control
Dynamics
Processing
Parametric
Equalization
Telephony Processing
level_pre
level_post
level_post

Polycom SoundStructure C8 Specifications

General

Brand	Polycom
Model	SoundStructure C8
Category	Conference System
Language	English