User Manual

Chapter 5 Configuring Ports for Modems 23
Tips on Configuring A Modem
Here are some tips on configuring modems to work with device server:
• Configure the modem so that DCD goes high when it receives an
incoming connection request.
• Configure the modem to answer an incoming call only when DTR is
high, and to drop the line when DTR goes low.
• For bidirectional connections, it is advisable to configure the non-
volatile parameters in the modem for incoming calls. Also configure
the modem to reset to these parameters when DTR is dropped.
• Configure the modem to lock the serial line speed at the highest
baud rate the modem will accept for reliable data transfer because
the device server cannot switch the baud rate of the serial line on a
per call basis without reconfiguration.
Note: You may want to consider connecting modems using RealPort, a feature that
allows network-based host systems to use the ports of the device server as
though they were the host system’s own ports. It is an easy and efficient way
for modems to use device server ports. For information on this option,
see"About RealPort" on page 15.
Configuring Ports for Modems: Web Interface
Use this procedure to configure a port for a modem from the web interface.
1. Access the web interface by entering the device server IP address in a
browser’s URL window.
2. Log on to the device server as root.The default password is dbps.
3. From the main menu, click Configure > Ports.
4. Click the port from the port column.
5. Configure the correct device type. Click Modem in for inbound modem
connections, Modem out for outbound connections, and Modem for
bidirectional connections.
6. Make other changes to the configuration as required. Use the online
help for information.
7. If you want to apply this configuration to multiple ports, click Clone,
select the ports for this configuration, and then click Continue.
8. Cick Submit.
9. To return to the main Ports menu, click Ports from the menu again.
Chapter 5
Configuring Ports for Modems