Maxim Integrated 73M2901CE AT Command - Manual (Page 31)

UG_2901CE_027 73M2901CE AT Command User Guide
Rev. 2.0 31
4.4.30 S29 – Extended Result Selection / Cadence Type Selection
(default = 88h)
Register S29 reflects the status of various options. This register is normally read only since its contents
are set by other commands. Register S29 is a bit mapped register whose bits are defined as follows:
bits 0/1
0/0 Do not return extended result codes (40 - 80). The message CONNECT followed by the data rate
between the
DTE and the modem will be sent to the DTE (W0 command) (default).
0/1 The CONNECT message will report the DTE speed then enable the carrier and extended result
codes (W1
command).
1/0 The CONNECT message will report the DCE speed. All extended result codes are disabled (W2
command).
Bit 2 0 = All Carrier, Protocol and Connect Result Codes enabled if W1 in effect.
1 = All Carrier Result Codes enabled if W1 in effect (No Protocol or Connect Result Codes).
Bit 3 0 = Escape sequence disabled.
1 = Escape sequence enabled.
Bit 4 0 = Alternate cadences for dial tone (default).
1 = Dual cadence for dial tone.
Bit 5 0 = Alternate cadences for busy tone (default).
1 = Dual cadence for busy tone.
Bit 6 0 = Alternate cadences for Ring (default).
1 = Dual cadence for Ring.
Bit 7 0 = Continuous Dial tone Disabled.
1 = Continuous Dial tone.
4.4.31 S30 – Bit Mapped Handshake Register
(Default = 6Ch)
Bit Decimal Value Hex Value Mode
0 1 $01 4-Wire mode (T)
1 2 $02 Bell 202
2 4 $04 V.22 bis (default).
3 8 $08 V.22 (default).
4 16 $10 Bell 212.
5 32 $20 Bell 103 (default).
6 64 $40 V.21 (default).
7 128 $80 V.23.
The settings in this register determine the handshake method(s) to be attempted (bits 1 – 7).
Precedence from highest to lowest: V.22bis, V.22, Bell 212, Bell 103, V.21, V.23, Bell 202.