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16 536EX Chipset Developer’s Manual
Intel Confidential
AT Command Summary Tables
* Xn Result code type 4 0–4yes
X0
Enables result codes 0–4; disables detection
of busy and dial tone
X1
Enables result codes 0–5, 10, and above;
disables busy and dial tone detection
X2
Enables result codes 0–6 and 10 and above;
disables busy detection and enables dial
tone detection
X3
Enables result codes 0–5, 7, and 10 and
above; enables busy detection and disables
dial tone detection
X4
Enables result codes 0–7 and 10 and above;
enables busy and dial tone detection
* Yn Long space disconnect 0 0, 1 yes
Y0 Disables long space disconnect
Y1 Enables long space disconnect
Zn Recall stored profile 0 0, 1 no
Z0 Resets modem and recalls user profile 0
Z1 Resets modem and recalls user profile 1
* &Cn DCD (data carrier detect) option 1 0, 1 yes
&C0
Ignores remote modem status; DCD always
on
&C1 DCD set according to remote modem status
&Dn DTR (data terminal ready) option 2 0–3yes
&D0 In Async mode, modem ignores DTR
&D1
Modem switches from data mode to
command mode when an on-to-off transition
of DTR occurs
&D2
When DTR switches off, the modem goes
on-hook and disables Auto-answer mode;
when DTR switches on, auto-answer is
enabled
&D3
Turning off DTR re-initializes the modem and
resets values except UART registers
&F Load factory defaults none – no
*&Gn
Guard tone option (1200 bps and 2400 bps
only)
00–2yes
&G0 Disables guard tone
&G1 Enables 550 Hz guard tone
&G2 Enables 1800 Hz guard tone
&Kn Select serial flow control 3 0, 3, 4 yes
Table 5. Data Mode Command Summary (Continued)
Note Command Function Default Range
Reported
by &Vn
* Value saved in NVRAM.
** Command not preceded by an ‘AT.’