Connecting to an SMSC

Create an SmppClient instance

SmppClient client = new SmppClient();

Then provide connection details by populating the SmppClient.Properties property

SmppConnectionProperties properties = client.Properties;
properties.SystemID = "mysystemid";
properties.Password = "mypassword";
properties.Port = 2034; //IP port to use
properties.Host = "196.23.3.12"; //SMSC host name or IP Address
properties.SystemType = "mysystemtype";
properties.DefaultServiceType = "mydefaultservicetype";

//Resume a lost connection after 30 seconds
client.AutoReconnectDelay = 3000;

//Send Enquire Link PDU every 15 seconds
client.KeepAliveInterval = 15000;

//Start smpp client
client.Start();

Additionally, you can handle the SmppClient.ConnectionStateChanged event to receive notifications when connection status changes

client.ConnectionStateChanged += client_ConnectionStateChanged;

private void client_ConnectionStateChanged(object sender, ConnectionStateChangedEventArgs e)
{
     switch (e.CurrentState)
     {
          case SmppConnectionState.Closed:
             //Connection to the remote server is lost
             //Do something here

              e.ReconnectInteval = 60000; //Try to reconnect after 1 min
              break;
          case SmppConnectionState.Connected:
             //A successful connection has been established
             break;
          case SmppConnectionState.Connecting:
              //A connection attemp is still on progress
              break;
     }
}