CHAPTER 3Configuring the Gateway132Figure 138. Dialup modem - PPP parameter• Local IP address - enter the IP address your A850 has to usefor the PPP connection;• Remote IP address - enter the IP address the remote stationhas to use for the PPP connection;• Netmask - enter which network mask is to be used for the IPaddresses (specifies the netmask aka “subnet mask”associated with the network IP address);• Timeout - enter the amount of time (in minutes) after whichyour A850 should interrupt a PPP connection;• Set the default route on PPP connect - defines the PPPconnection determined here as default in the dialup modem.Note: Usually, the PPP connection determined in PPP Dialup isdefined as default.Wireless ModemsMost RTU types contact the A850 by a wireless connection; thisrequires a Wireless Modem A440 to be connected to the A850.Note: The firmware version of the Wireless Modem A440 must bea least 3.0!The following RTU types can be reached via an A440:• A730 as router only,• A720,• A723,• A724,• A725,• A726,• A731,• A732,• A733,
