Transmit signals between your RS232 ports over CAT5, CAT5E, and CAT5 network cables. Transmits signals up to 100FT. | RJ45 Pin Outs: 1-Blue, 2-Orange, 3-Black, 4-Red, 5-Green, 6-Yellow, 7-Gray, and 8-White. | DB25 Pin Definition: 1.SHIELD(Shield Ground); 2.TxD(Transmitted Data); 3.RxD(Received Data); 4. RTS(Request to Send); 5. CTS(Clear to Send); 6.DSR(Data Set Ready); 7.GND(System Ground); 8.DCD(Data Carrier Detect); 9.RESERVED; 10.RESERVED; 11.STF(Select Transmit Channel); 12.SCD(Secondary Carrier Detect); 13.SCTS(Secondary Clear to Send); 14.STXD(Secondary Transmit Data); 15.TCK(Transmission Signal Element Timing); 16.SRXD(Secondary Receive Data); 17.RCK(Receiver Signal Element Timing); 18.LL(Local Loop Control; 19.SRTC(Secondary Request to Send); 20.DTR(Data Terminal Ready); 21.RL(Remote Loop Control); 22.RI(Ring Indicator); 23.DSR(Data Signal Rate Selector); 24.XCK; 25.TI. | High quality alloy transmission port reduce the transmission impedance and interference, environmentally ABS material, super wear-resistant. | The DB25 male to RJ45 adapter converts the pin configuration of the DB25 connector into the appropriate wiring scheme for an RJ45 connector, allowing you to establish a connection between devices that use these different interfaces. It is often used in scenarios where legacy serial devices need to be connected to a network infrastructure using Ethernet technologies.