Chapter 11 - AT Command Set Summaries
11-6
Command Options Function & Description Ref.
&R0 CTS tracks RTS, response delay is set in S26
&R1 * Ignore RTS, assumes RTS always ON
&Sn Data Set Ready (DSR) function selection. S21.3
&S0 * DSR overridden, DSR always ON.
&S1 DSR according to CCITT (ITU-TSS). (See also S41.5,
S44.4)
&Tn Modem testing.
&T0 Terminate test in progress.
&T1 Initiate Analog Loop-back (ALB) test.
&T3 Initiate Local Digital Loop-back (LDL) test
&T4 Grant Remote Digital Loop-back request from remote
modem
&T5 Deny Remote Digital Loop-back request from remote
modem
&T6 Initiate Remote Digital Loop-back (RDL) test
&T7 Initiate Remote Digital Loop-back with self test
(RDL+ST)
&T8 Initiate Analog Loop-back with self test. (ALB+ST)
&Vn View profile settings.
&V0 View current active settings.
&Vn View the (n-1) user profile settings (n=1-4)
&V5 View factory default settings.
&Wn n=0-3 Write current settings to user profile n in non-volatile
RAM. (See also S35.6)
&Xn Synchronous mode timing (clock) source selection S14.4-5
&X0 * Modem provides synchronous transmit clock signal
(Internal clock to pin 15 of EIA-232D)
&X1 Terminal provides synchronous transmit clock signal
(External clock from pin 24 of EIA-232D)
&X2 Received carrier provides synchronous transmit clock
signal (Remote or Slave clock to pin 15 of EIA-232D)
&Yn Break handling. Destructive Break clears the buffer.
Expedited Break is sent immediately to the remote
system. (For internal modem only.)
S28.2-3
&Y0 Destructive, expedited.
&Y1 * Nondestructive, expedited.
&Y2 Nondestructive, unexpedited.
&Z? Display all the phone numbers stored in non-volatile
RAM.
&Zn=s n=0-39 Write phone number/s to NVRAM at location n (n=0-
39) use AT*Dn or ATS29=n to set the default dial
pointer.