Dtmf detect register, Test timer – Maxim Integrated Teridian V.22 bis Linux Softmodem for 73M1822/73M1922 MicroDAA User Manual
Page 52
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide
UG_1x22_043
52
Rev. 1.5
S65
DTMF Detect Register
0
See following
Bit 7 indicates a valid DTMF detection. A register value of zero indicates no
detect for the polled application. Bits 6 - 4 are reserved. Bits 3 - 0 indicate the
tone pair detected. Works with command J6 and bit 7 have to be set in order to
be valid. The following tables define DTMF decoding:
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Valid
N/A
N/A
N/A
DTDET3 DTDET2 DTDET1 DTDET0
DTMF Detect bits
Dialed
Tone Pair Detected
Det Valid DTDET 3 DTDET 2 DTDET 1 DTDET 0
Digit
Low Tone
(Hz)
High Tone
(Hz)
1
0
0
0
0
D
941
1633
1
0
0
0
1
1
697
1209
1
0
0
1
0
2
697
1336
1
0
0
1
1
3
697
1477
1
0
1
0
0
4
770
1209
1
0
1
0
1
5
770
1336
1
0
1
1
0
6
770
1477
1
0
1
1
1
7
852
1209
1
1
0
0
0
8
852
1336
1
1
0
0
1
9
852
1477
1
1
0
1
0
0
941
1336
1
1
0
1
1
*
941
1209
1
1
1
0
0
#
941
1477
1
1
1
0
1
A
697
1633
1
1
1
1
0
B
770
1633
1
1
1
1
1
C
892
1633
S68
Test Timer
0
0 second.
Times how long the self-tests should run in seconds.