Extended At& Command Sets - 3Jtech uModem Technical Document

3. Extended AT& Command Sets
Command
&Bn
&Cn
&Dn
&F
&Gn
&Hn
&Kn
&Nn
2003/6 From 3JTech
Options Function & Description
Data rate, terminal-to-modem. (DTE/DCE) S28.6
&B0 DTE rate follows connection rate. (See also
S44.6)
&B1 * DTE/DCE rate fixed at DTE setting (See
also S18, S20, and S44.6)
Carrier Detect (CD) options
&C0 CD always ON (See also S42.7)
&C1 * CD tracks presence of carrier (See also
S38.3, S42.7)
Data Terminal Ready (DTR) options. (See
also S25)
&D0 Ignore DTR signal, assume DTR is always
ON.
&D1 108.1, DTR OFF-ON transition causes dial
of the default number. (See also 'AT*Dn'
and S48.4)
&D2 * 108.2, Data Terminal Ready, DTR OFF
causes the modem to hang up.
&D3 Same as &D2 but DTR OFF causes the
modem to hang up and reset from profile 0.
Load factory settings to RAM as active
configuration.
Guard tone options
&G0 * No guard tone (within USA, Canada).
&G2 1800 Hz guard tone.
Data flow control, DTE/DCE.
&H0 Flow control disabled.
&H3 * Hardware (CTS/RTS) flow control
&H4 Software (XON/XOFF) flow control.
Modem error control and data
compression.
&K0 No error control.(Same as AT&K)
&K1 MNP4 (See also S41.0).(include MNP3)
&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).
Modem link mode options (DCE/DCE).
(See also S43.7, S48.1)
&N0 * Multi-Auto, auto negotiate highest possible
link rate: V.90,V.34, V.32bis, V.32, V.22bis,
V.22 and Bell 212A, G3 Fax
V.17/V.29/V.27ter.
&N3 V.32 9600T/9600/7200T/4800
&N4 V.32 9600/7200/4800
&N5 V.32 4800
&N12 V.23 1200/75
&N13 V.23 600/75
&N14 V.22bis 2400/1200
&N15 V.22 1200
&N16 V.21 300
&N17 V.32bis 14400/12000/9600/7200/4800
&N18 V.32bis 12000/9600/7200/4800
&N19 V.32bis 7200/4800
Revision 1.0
Research & Development
Ref.
S21.4
S21.6-7
S28.4-5
S27.3-5
S27.0-2
S19
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