User's Manual

18 AT Command Set Summaries
Command Options Function & Description
Sr? Display value stored in S-register 'r'
T Ton dial
Vn
Sets display type for Result Codes
V0 Display result code in numeric form. (See the result code table of 'ATXn')
V1 * Display result code in verbose form.
Xn
n=0-7
5 *
Result code options, see the Options Table
Zn
n=0-1 Reset modem and set power-on profile n.
n=2 Reset modem and load factory settings.
$ or ? Basic command summary help
&$ or &? Extended ‘AT&’ command summary help
*$ or *? Extended ‘AT*’ command summary help
Extended AT& Command Set
Command Options Function & Description
&Bn Data rate, terminal-to-modem. (DTE/DCE)
&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)
&Cn Carrier Detect (CD) options
&C0 CD always ON
&C1 * CD tracks presence of carrier
&Dn Data Terminal Ready (DTR) options
&D0 Ignore DTR signal, assume DTR is always ON.
&D1 108.1, DTR OFF-ON transition causes dial of the default number.
&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.
&F Load factory settings to RAM as active configuration.
&Gn Guard tone options
&G0 * No guard tone (within USA, Canada).
&G1 550 Hz guard tone.
&G2 1800 Hz guard tone.
&Hn Data flow control, DTE/DCE.
&H0 Flow control disabled.
&H3 * Hardware (CTS/RTS) flow control
&H4 Software (XON/XOFF) flow control.
&Kn Modem error control and data compression.
&K0 No error control.
&K1 MNP4
&K2 MNP4+MNP5
&K3 V.42+MNP4.
&K4 * V.42+V.42bis, compatible with &K2
&Mn Synchronous/asynchronous mode selection
&M0 * Asynchronous mode with data buffering
&M1 Hayes AutoSync mode
&M2 Direct asynchronous mode, no data buffering
&Nn Modem link mode options (DCE/DCE).
&N0 * Multi-Auto, auto negotiate highest possible link rate: V.34bis, V.34,
V.32bis, V.32, V.22bis, V.22 and Bell 212A.