CT8022 Datasheet, PDF (141/194 Pages) List of Unclassifed Manufacturers – VOIP/VON G.723.1, G279AB TRUESPEECH CO-PROCESSOR

Version: 1.18
PRELIMINARY/CONFIDENTIAL
TrueSpeech® Co-Processor
9.21 Standalone Speakerphone
9.21.1 Enter Standalone Speakerphone Mode Command
This command is not available in DSVD Speakerphone mode.
1110
01
01
Line Sensitivity Microphone
Priority
0
Sensitivity
(15-12)
(11-10)
(9-8)
(7-5)
(4-2)
(1)
(0)
Status:
1110
01
01
Line Sensitivity Microphone
Priority
0
Sensitivity
(15-12)
(11-10)
(9-8)
(7-5)
(4-2)
(1)
(0)
Line Sensitivity:
000
2 dB
001
4 dB
010
6 dB
011
8 dB (normal setting)
100
10 dB
101
12 dB
110
14 dB
111
16 dB
Microphone Sensitivity:
000
001
010
011
100
101
110
111
2 dB
4 dB
6 dB (normal setting)
8 dB
10 dB
12 dB
14 dB
16 dB
The line and microphone sensitivity determine the signal-to-noise ratio (SNR) at which the voice detectors for the
transmit and receive directions will be activated. The voice detectors are used in half-duplex mode to determine
which direction is talking, and which direction should be attenuated.
Priority:
0
both directions have equal priority
1
microphone side (near end) has priority
The priority control determines the behavior of the system when both directions are silent. In the equal priority (or
no priority) mode, the loop attenuation is distributed equally between the receive and transmit directions. If the
priority bit is set, the line side gets all the attenuation and the microphone (near end) has priority.
Note: Before entering Standalone Speakerphone mode, the CODEC Configuration must be programmed
with Output CODEC set to 00 and Input CODEC set to 0.
CT8022A11AQC FW Revision 0118
DSP GROUP, INC., 3120 SCOTT BOULEVARD
141
SANTA CLARA, CA 95054 PH: 408 986 – 4300 FAX: 408 986 – 4490
All specifications are subject to change without prior notice.