Hardware manual

5901 High Speed Dialup Modem Hardware Manual
October 19, 2007
21
5.3 Operation with Non-Programmable Controllers
When the 5901 modem is used with non-programmable controllers it operates as an answer only
modem. This mode of operation is typically used with a SmartWIRE 5202 Communication
Controller. The 5202 controller is not programmable and cannot send configuration commands to
the 5901 modem.
The 5901 modem must be configured using a communication program. Refer to the section 5.1.2-
Operation using Communication Software for more information on using a communication
program. The documentation for the communication program used will contain information about
how to send AT commands to the modem. Once the modem is configured, the settings must be
saved in the modem NVRAM.
When using the 5901 modem with the 5202 controller the default configuration must be changed for
the modem to auto-answer. The default setting for the auto-answer register, S0, is 0.
The following AT command string is used to change the auto-answer setting and then save it to
NVRAM:
AT &F0 S0=1 &W0 &Y0
where:
&F0 Sets the modem for factory default settings.
S0=1 Sets the modem to auto-answer after one ring.
&W0 Saves the settings to user profile 0.
&Y0 The modem will use the settings in user profile 0 after any power reset.