Owner manual

UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide
Rev. 1.5 25
S12 DTMF / Twist Dial Register

32 D digit selected, 2dB twist.
Selects the digit to be dialed as well as the desired twist between the low and the high
frequency. For normal operation, only the twist needs to be set once. The digit will be
filled
automatically.
For test operation, both the twist and the digit must be filled. See J
command.
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
N/A Twist 2 Twist 1 Twist 0 DTMF3 DTMF2 DTMF1 DTMF0
DTMF3 DTMF2 DTMF1 DTMF0 Digit Low tone High Tone

0 0 0 0 D 941 1633
0 0 0 1 1 697 1209
0 0 1 0 2 697 1336
0 0 1 1 3 697 1477
0 1 0 0 4 770 1209
0 1 0 1 5 770 1336
0 1 1 0 6 770 1477
0 1 1 1 7 852 1209
1 0 0 0 8 852 1336
1 0 0 1 9 852 1477
1 0 1 0 0 941 1336
1 0 1 1 * 941 1209
1 1 0 0 # 941 1477
1 1 0 1 A 697 1633
1 1 1 0 B 770 1633
1 1 1 1 C 852 1633
Twist2 Twist1 Twist0 Relative level
0 0 0 No twist, 0 dB nominal.
0 0 1 low frequency 1 dB below the high frequency tone.

0 1 0 low frequency 2 dB below the high frequency tone.
0 1 1 low frequency 3 dB below the high frequency tone.
1 0 0 low frequency 4 dB below the high frequency tone.
1 0 1 low frequency 5 dB below the high frequency tone.
1 1 0 low frequency 6 dB below the high frequency tone.
1 1 1 low frequency 7 dB below the high frequency tone.