AT Command Set Summaries 95
Command Options
Function & Description Ref.
&D3 Same as &D2 but DTR OFF causes
the modem to hang up and reset from
profile 0.
&F Load factory settings to RAM as
active configuration.
&Gn Guard tone options S28.4-5
&G0 * No guard tone (within USA,
Canada).
&G2 1800 Hz guard tone.
&Hn Data flow control, DTE/DCE. S27.3-5
&H0 Flow control disabled.
&H3 * Hardware (CTS/RTS) flow control
&H4 Software (XON/XOFF) flow control.
&Jn Type of Phone line S28.0
&J0 Single phone line, RJ-11
&J1 Multiple phone/modem line,
RJ12/RJ13
&Kn Modem error control and data
compression.
S27.0-2
&K0 No error control.(Same as AT&K)
&K1 MNP4 (See also S41.0).
&K2 MNP4+MNP5 (See also S38.5,
S41.0).
&K3 V.42+MNP4.
&K4 * V.42+V.42bis, compatible with &K2
(See also S38.5).
&Ln &L0 * Dial-up line S14.2-3
&L1 2W leased line
&L2 4W leased line
&Mn
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