User guide

USR4204 User Guide
Page 12 of 69
Remote Access
Setup Using an Analog Modem
The PSTN phone network allows two analog modems to connect and pass data, and either
modem can initiate the connection. For analog out-of-band remote management, the
modem at the management site typically initiates contact.
Confirm requirements for analog connectivity:
 Computer terminal with a COM port
 Terminal emulation application
 Analog modem at the management site
 Analog modem at the equipment site
 Access to a phone line at both locations
Configuring the Analog Modems
The analog modem deploying at the management site requires no special configuration.
Before connecting the analog modem deploying at the equipment site to the USR4204, it
must be pre-configured as follows. Consult the modem’s user guide for details on
configuring modem settings and storing into memory.
Fixed DTE Rate
The USR4204 terminal port has a fixed DTE rate of 9600bps, 8N1, so the modem must also
have a fixed rate of 9600bps, 8N1. To set the modem DTE rate, use a terminal set at
9600bps, 8N1 to send commands to the modem to establish the modem DTE rate, and then
store the updated settings into modem memory.
Save a step by first entering all the modem configuration commands at the
9600bps DTE rate, then store the settings into modem memory to save the
new settings and the DTE rate together.
Result Codes - Disabled
Disable Result Codes to prevent USR4204 from misinterpreting modem Result Codes as
commands.
Local Echo - Disabled
Disable Local Echo to prevent USR4204 transmissions from recirculating between the
modem and the USR4204.
Auto-Answer - Enabled
Enable Auto-Answer so the modem answers whenever contact is initiated by the analog
modem at the management terminal.