User`s manual

AT Command Reference Manual
3-20 1048
&Wn - Store Current Configuration
Saves the current (active) configuration (profile), including S-Registers, in one of the two user profiles in NVRAM as denoted
by the parameter value. This command will yield an ERROR message if the NVRAM is not installed or is not operational as
detected by the NVRAM test.
The current configuration is comprised of a list of storable parameters illustrated in the &V command. These settings are
restored to the active configuration upon receiving an Zn command or at power up (see &Yn command).
&W0 Store the current configuration as profile 0.
&W1 Store the current configuration as profile 1.
Result Codes:
OK n = 0 or 1.
ERROR Otherwise.
&Xn - Select Synchronous Clock Source
Selects the source of the transmit clock for the synchronous mode of operation. The parameter value, if valid, is written to
S27 bits 4 and 5.
In asynchronous mode, the transmit and receive clocks are turned OFF. In synchronous mode, the clocks are turned ON
with the frequency of 1200 Hz or faster corresponding to the speed that is selected for modem operation.
&X0 Selects internal timing. The modem generates the transmit clock signal and applies it to the
TXCLK output at the serial interface.
&X1 Selects external timing. The local DTE sources the transmit clock signal on the XTCLK input of
the serial interface. The modem applies this clock to the TXCLK output at the serial interface.
&X2 Selects slave receive timing. The modem derives the transmit clock signal from the incoming
carrier and applies it to the TXCLK output at the serial interface.
Result Codes:
OK n = 0 to 2.
ERROR Otherwise.
&Yn - Designate a Default Reset Profile
Selects which user profile will be used after a hard reset.
&Y0 The modem will use profile 0.
&Y1 The modem will use profile 1.
Result Codes:
OK n = 0 to 1.
ERROR If n > 1, or if NVRAM is not installed or is not operational.
&Zn=x - Store Telephone Number
The modem can store up to four telephone numbers and each telephone number dial string can contain up to 34 digits.
&Zn=x n = 0 to 3 and x = dial string. (Requires 256-byte NVRAM.)
Result Codes:
OK For n ≤ 3, and x ≤ 34 digits.
ERROR If n > 3, x > 35 digits, or if NVRAM is not installed or is not operational.