Model 4610 serial port 4, RS-232/RS-485 port, DB-9 connector 2 fiber optic Ethernet ports, with 62.5/125 MT-RJ connector um fiber optic cable port isolation 500 V DC protocol TriStation, Modbus, TCP/IP, ICMP, SNTP, TSAA (supporting IP multicast), Trimble GPS, point-to-point (UDP/IP), point-to-point time synchronization, Jet direct (network printing) Modbus function 01-_ Read coil status 06- modify register content 02- Read Input Status 07- Read Abnormal Status 03- Read Holding Registers 08- Loopback Diagnostic Test 04- Read input register 15- Force multiple coils 05- Modify coil status 16- Preset multiple register communication Speed copper Ethernet port: 10/100 Mbps Fiber Ethernet port: 100 Mbps Serial port: Up to 115.2 Kbps Status indicators per port Pass, Fault, Active, Stable LINK -1 per network port, TX (transmit) -1 per port, RX (receive) -1 per port Manufacturer: TRICONEX, manufactured in the United States