Polycom SoundStructure C16 Design Manual page 47

Telephony Processing
To Telco
from Matrix
Tone
Generator
From Telco
Fader
to Matrix Equalization
detector that analyzes the telephony input signal and reports if any call prog-
ress tones are present (for example, if the telephony line is busy, the phone is
ringing, etc.).
Input
1
Processing
Input
2
Processing
Input
N
Processing
Dynamnics Parametric
Delay
Processing Equalization
Parametric Dynamics Automatic
Processing Gain Control
Call Progress
Detection
Typically, the telephony cards will be used in the C-series devices for audio
conferencing applications. The telephony cards are also supported on the
SR-series allowing additional plug-in cards for multiple audio conferencing
telephone lines when C-series products are used with SR-series products. In
some commercial sound applications it is also useful to have telephony access
to either broadcast or monitor the audio in the system. Audio conferencing
applications will not work with only SR-series devices because there is no
acoustic echo cancellation processing in the SR-series devices.
The telephony cards should not be used with the SR-series of products for audio
conferencing applications (i.e., simultaneous two-way audio communication) unless
all the microphones in the system are connected to SoundStructure C-series
devices. The SR-series products do not have acoustic echo cancellation.
Telco
Telco
Telco
Processing
Telco
Processing
Processing
Processing
Output
1
Processing
Output
2
Processing
Matrix
Output
N
Processing
SubMix
Submix
Processing
Processsing
Fader
Line Echo
Cancellation
Noise
Cancellation
SoundStructure Product Family
D/A Output to
Analog
Converter PSTN Line
Gain
A/D Input from
Analog
Converter PSTN Line
Gain
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