AMBE-2000 Digital Voice Systems, Inc., AMBE-2000 Datasheet - Page 29

• Manufacturer Part Number: AMBE-2000
• Description: 2.0 - 9.6 KBPS Single ic For Toll-quality, Low Data Rate, Real Time Speech Compression
• Manufacturer: Digital Voice Systems, Inc.

5.2.7
Should be set to 0x0000
5.2.8
Use this word to set DTMF tones. See Table 5-F for a list of tones and their corresponding values. . An expanded list of tones
and values can be found in the Appendices, Section 8.4.
To generate no tones, set the DTMF Code to 0xff. Dial, ring, and busy tones are standard North American call progress tones.
DTMF Amplitude
The DTMF Amplitude runs from 3 to –60 dBm0. This value is a signed byte (example: 0x03 = 3, 0x00 = 0, 0xC4 = -60).
5.2.9
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Bit 15
MSB
Framed Input: Word 9 : Unused in Input
Framed Input: Word 10 : DTMF Control
Framed Input: Word 11 : Control Word 2
15:
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14
14
Decoder Output Volume Control
13
13
Table 5-E DTMF Control Format
DTMF Amplitude
Table 5-G Control Word 2 Format
12
12
Table 5-F DTMF Codes for Digit Detect/ Generate
DTMF Code
11
0x8A
0x8B
0x8C
0x8D
0x8E
0x80
0x84
0x88
0x81
0x85
0x89
0x82
0x86
0x87
0x83
0x8F
0x90
0x91
0x92
0xff
11
10
Control Word 2 – 16-bits (See Table 1-F)
10
AMBE-2000™ Vocoder Chip
User’s Manual Version 4.0
DTMF Digit
Busy Tone
Ring Tone
Dial Tone
9
DTMF Control – 16-bits
Inactive
9
A
B
C
D
1
2
3
4
5
6
7
8
9
0
#
*
8
8
Unused
7
Frequency 1
7
0
1209
1336
1477
1209
1336
1477
1209
1336
1477
1336
1209
1477
1633
1633
1633
1633
(Hz)
440
480
620
N/A
Unused
6
0
6
DTMF Digit Detect/ Generate
5
VAD
5
Frequency 2
(Hz)
4
697
697
697
770
770
770
852
852
852
941
941
941
697
770
852
941
350
440
480
N/A
Unused
4
0
3
SL
3
2
EC
2
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1
LSB
1
0:
RIS
0