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www.cooperbussmann.com/wirelessresources
Cooper Bussmann 245U-E Wireless Ethernet Modem & Device Server User Manual
Rev Version 2.19
• If you want the serial device visible as present on the wireless or wired network, the local IP address must be
the same as the IP address set for the desired port. A process called “proxy ARP” is used to make the device
visible on the network. In this process, the 245U-E pretends that it holds the IP address on the network, and
responds on behalf of the remote device.
The result of this is similar to bridging for a single device, with some exceptions. One of these exceptions is the
inability to handle name server searches of the network via this serial link. For example, you would encounter
difficulty if you were to use Windows Explorer over the serial link to find a PC on the wired network. For this to
operate correctly you must explicitly map computer names to IP addresses in the LMHOSTS file on your PC.
To configure Windows XP to establish a PPP connection to a 245U-E in SETUP mode:
1. On
Network Connections
in Windows XP, select “Create a new connection.”
2. In the New Connection Wizard, click
Next
.
3. Set up an advanced connection.
4. Connect directly to another computer.
5. Set PC as guest.
6. Set the Connection Name.
7. Select a COM port.
8. Select availability.
9. Click
Finish
.
10. Select properties of this new connection by right-clicking the connection.
11. On the
General
tab click
Configure
.
12. Ensure that the maximum speed is 115200 bps, and click
OK
.
13. Select the
Networking
tab, and then click
Internet Protocol (TCP/IP)
in the list box and click
Properties
.
14. On Properties, click
Advanced
.
15. On the
Advanced TCP/IP Settings
,
General
tab, clear the field in the PPP link “Use IP header compression.”
Configuration is now complete.
16. Click the newly created link to establish a connection to 245U-E.
17. Ensure that the username and the password are entered exactly as configured in 245U-E.
When booted in SETUP mode, the PPP server has username “user” and the password “user.”
Serial Gateway (Server/Client/Multicast)
Serial gateway functionality is available for both RS-232 and RS-485 ports independently, and enables serial data
to be routed via the wired or wireless network connection. Serial gateway functionality is similar to radio modem
functionality, allowing point-to-point and multipoint serial data transfer.
The serial gateway can be configured as either as server, client, multicast group, or Modbus.
•
Server
—When configured as server, the module will wait for a TCP connection to be initiated by a remote
client.
•
Client
—When configured as client, the module will automatically attempt to connect to a specified remote
server using TCP.
•
Multicast Group
—When configured as multicast group, the module will broadcast data to all members of the
same multicast group using UDP.
