Hardware manual

5901 High Speed Dialup Modem Hardware Manual

October 19, 2007

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.

10.3.16 &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.

10.3.17 &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.

10.3.18 &Zn=x - Store Telephone Number

The modem can store up to four telephone numbers and each telephone number dial string can

contain up to 31 digits.

(Requires 256-byte NVRAM installed.)

&Zn=x n = Decimal number from 0 to 3 corresponding to the selected telephone number.

x = Dial string from 0 to 31 characters.