Maxim Integrated Teridian V.22 bis Linux Softmodem for 73M1822/73M1922 MicroDAA - Manual (Page 50)

V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide UG_1x22_043
50 Rev. 1.5
S28
Fast Connect Status and Calling Tone Enable Register

50 See following.
Bit 0 1 AGC enable
 Bit 1 X Reserved
Bit 2 X Reserved
Bit 3 1 Synchronous mode (set by Y1 and Y4)
Bit 4 1 Answer tone enable
 Bit 5 1 Billing delay enable
 Bit 6 1 400ms answer tone at 1200bps
Bit 7 1 Calling tone enable
S60 Test Control Register
 0 See following
Bit 2 Bit 1 Bit 0 Function
 0 0 0 Data mode
0 0 1 Send Marks
0 1 0 Send Spaces
0 1 1 Send Dotting
1 0 0 Send S1
1 0 1 Send S0
1 1 0 Send Dotting ‘A’
1 1 1 Send Flags (07Eh)
Bit 3 1 Enable detection of dial tone
0 Disable detection of dial tone
 Bit 4 0 Disables the scrambler
1 Enables the scrambler
 Bit 5 0 Disables the de-scrambler
1 Enables the de-scrambler
Bit 6 1 Enable RLDB mode
0 Disable RLDB mode
Bit 7 1 Enable ALB mode
0 Disable ALB mode