Brand: DURApulse Item: Communication module Series: GS4 Port Protocol(s): Modbus TCP Communication Port and Connection Type(s): (1) Ethernet (RJ45) Port Speed(s): 10/100 Mbps auto-detect Number of Ports: 1 DURApulse GS4 series communication module, Modbus TCP, 1 port, (1) Ethernet (RJ45) port(s).