If you would like to use a meter like ION7550 as a gateway, you need to set an IP address in the meter and use the same ip address in Realtime Device manager. Step 1: set IP address and slave address on ION7550. Step 2: set slave address in Sepam M88 Step 3: In AVReporter Realtime Device Manager double click to Gateways , add a new gateway with ip address. Step 4: Open this new gateway, add an ION7550 meter and a Sepam M88.