Maxim Integrated Teridian V.22 bis Linux Softmodem for 73M1822/73M1922 MicroDAA - Manual (Page 34)

V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide UG_1x22_043
34 Rev. 1.5
0 280Hz – 680Hz
1 370Hz – 500Hz
2 240Hz – 580Hz
3 200Hz – 650Hz
15 User defined filter
S19 Precise Call Progress Selection
 195 350Hz and 440Hz are dial tones; 440Hz and 620Hz are Busy tones.
Defines which precise tones constitute a dial tone and which constitute a busy tone
(related bit must be set to one). High nibble defines dial tone and low nibble defines busy.
See also S63.
 Bit 0 Selection of 350Hz as a dial tone
 Bit 1 Selection of 440Hz as a dial tone
Bit 2 Selection of 480Hz as a dial tone
Bit 3 Selection of 620Hz as a dial tone
Bit 4 Selection of 350Hz as a busy tone
Bit 5 Selection of 440Hz as a busy tone
 Bit 6 Selection of 480Hz as a busy tone
 Bit 7 Selection of 620Hz as a busy tone
S63 Precise Call Progress Detect
 0 See following.
Bit 0 Detected f0 (350 Hz).
Bit 1 Detected f1 (440 Hz).
Bit 2 Detected f2 (480 Hz).
Bit 3 Detected f3 (620 Hz).
Bit 4 Detected 2130 Hz.
Bit 5 Detected 2750 Hz.
Bit 6 Busy tone detection enabled.
Bit 7 Call Progress filter #1 detect bit.
Country selection
dependent (S99)