Maxim Integrated 73M2901CE AT Command - Manual (Page 42)

73M2901CE AT Command User Guide UG_2901CE_027
42 Rev. 2.0
4.4.86 S85 – DTMF Transmit Level
(Default = 60)
S85 determines the maximum value sent to the DAC when sending DTMF tones.
Range is 60 to 127.
4.4.87 S86 – Flash On Time (!)
(Default = 50)
This register determines the on time for flash hook (!) in 10ms. Range is 1 – 211.
4.4.88 S87 – Flash Off Time (!)
(Default = 50)
This register determines the off time for flash hook (!) in 10ms. Range is 1 – 211.
4.4.89 S88 – Imprecise Filter Selection
(Default = 0)
Bits 0 through 3 0 to 15 selected imprecise filters for pre-dial.
Bits 4 through 7 0 to 15 selected imprecise filters for post-dial.
Frequencies are defined as follows:
Hex Value
Frequency Range
$0 280-680Hz
$1 370-500Hz
$2 240-580Hz
$3 200-650Hz
$F User Defined
4.4.90 S89 – Data Set Ready
(Default = 0)
Bits 0 thru 1
N command value
Bit 2 Enables Lease Line Operation
Bit 3 Enables Off-Hook Energy sensing Parallel pick-up detection (PPU-E)
Bit 4 Toggles ring input polarity for PPU-V (Default is
RING active low)
Bit 5 Toggles ring input polarity for LIU-V (Default is
RING active low)
Bit 6 VFI fast connect originate handshake when specifying Bell 212.
Will send FLAGS as part of the handshake when Y1 or Y4 is selected.
Bit 7 Reserved