Polycom SoundStructure C16 Design Manual page 43

Telephony Processing
To Telco
from Matrix
Tone
Generator
From Telco
Delay Fader
to Matrix
progress detector that analyzes the telephony input signal and reports if any
call progress 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
Processsing
Dynamnics Parametric
Processing Equalization
Parametric Dynamics
Equalization Processing
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
Delay Fader
Cancellation
Automatic Noise
Gain Control Cancellation
Call Progress
Detection
SoundStructure Product Family
D/A
Analog
Converter
Gain
Line Echo
A/D
Analog
Converter
Gain
Output to
PSTN Line
Input from
PSTN Line
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