Maxim Integrated 73M2901CE AT Command - Manual (Page 25)

UG_2901CE_027 73M2901CE AT Command User Guide
Rev. 2.0 25
4.4.14 S13 – DTMF Transmit Attenuation
(Default = 10h)
Gain/Attenuation level can go from +4.0 dB to –10.0 or –11.0 dB from nominal.
DTMF CP / Data
D7 D6 D5 D4 D3 D2 D1 D0
DTMF bit3 DTMF bit2 DTMF bit1 DTMF bit0 X CP/D bit2 CP/D bit1 CP/D bit0
Note: DTMF gain increments have to be a minimum of 1dB, while for CP/Data the minimum is 2dB gain
increments.
Bit 3 Bit 2 Bit 1 Bit 0 DTMF Gain CP/Data Gain
0 0 1 0 +4.0 dB +4.0 dB
1 0 1 0 +3.0 dB +4.0 dB
0 0 0 1 +2.0 dB +2.0 dB
1 0 0 1 +1.0 dB +2.0 dB
0 0 0 0 0.0 dB 0.0 dB
1 0 0 0 -1.0 dB 0.0 dB
0 1 1 1 -2.0 dB -2.0 dB
1 1 1 1 -3.0 dB -2.0 dB
0 1 1 0 -4.0 dB -4.0 dB
1 1 1 0 -5.0 dB -4.0 dB
0 1 0 1 -6.0 dB -6.0 dB
1 1 0 1 -7.0 dB -6.0 dB
0 1 0 0 -8.0 dB -8.0 dB
1 1 0 0 -9.0 dB -8.0 dB
0 0 1 1 -10.0 dB -10.0 dB
1 0 1 1 -11.0 dB -10.0 dB
4.4.15 S14 – Bit Mapped Register
(default=AAh)
Register S14 reflects the status of certain options. Register S14 is a bit mapped register whose bits are
defined as follows:
Bit 0 In Data Mode:
0 = Clear Channel for receiver.
1 = Receive Channel speed buffered.
In Call Progress Mode:
0 = Single cadence detection.
1 = Dual Cadence Detection.
Bit 1 0 = No echo.
1 = Echo (see the E[n] command) (Default)
Bit 2 0 = Result codes enabled (see Q[n] command) (Default).
1 = Result codes disabled.