Local TCP port for data: Specify local TCP port for data flow.
Local TCP port for redirecting modem registers: optional, put 0 if not needed.
Max number of incoming TCP connections: set limit for number of incoming connections.
Disable TCP buffering: If this feature is enabled, TCP packets will be sent immediately without buffering. This can reduce latency for small packets, but may also increase network traffic and cause packet fragmentation. For more information, see TCP_NODELAY flag in MSDN.