S65 – dtmf detect register, 67 s66 – wait for dialtone, 68 s67 – qualify dialtone – Maxim Integrated 73M2901CE AT Command User Manual
Page 38: 69 s68 – test timer, S66 – wait for dialtone, S67 – qualify dialtone, S68 – test timer
73M2901CE AT Command User Guide
UG_2901CE_027
38
Rev.
2.0
4.4.66
S65 – DTMF Detect Register
(Default = 0)
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 has 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
Det Valid Reserved
Reserved
Reserved
DTDET3 DTDET2 DTDET1 DTDET0
DTMF Detect bits
Dialed
Digit
Tone Pair Detected
Det Valid
DTDET 3
DTDET 2
DTDET 1
DTDET 0
Low Tone
(Hz)
HighTone
(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
4.4.67
S66 – Wait for Dialtone
(Default = 8)
Sets the maximum number of seconds the modem waits for dial tone. Range is 1 - 254 (seconds).
4.4.68
S67 – Qualify Dialtone
(Default = 120)
Sets the minimum duration for dial tone. Range is 1 – 254 (1/100 sec).
4.4.69
S68 – Test Timer
(Default = 0)
Times how long the self-tests should run in seconds. Range is 0 to 254.