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In most cases, an RJ45 network interface (referring to the physical interface circuit on a device, such as a network card or switch interface) cannot function without a transformer. This is determined by Ethernet standards and practical application requirements. The specific reasons are as follows

It is widely used in network environments such as Ethernet. By connecting twisted-pair cables (such as common unshielded twisted-pair UTP or shielded twisted-pair STP cables), it enables physical connection and data transmission between network devices such as computers, switches, and routers. The RJ45 connectors on both ends of the network cables we use daily (such as Cat5e, Cat6, etc.) are typical examples.

A 10G single-mode optical module is an optoelectronic conversion device that supports high-speed data transmission of 10Gbps. It uses single-mode fiber for long-distance communication and is widely used in data centers, metropolitan area networks, and 5G networks.

This is because "gigabit" in Ethernet standards usually refers to an effective data transfer rate of 1Gbps (1000Mbps), while 1.25Gbps is the transmission rate of the optical module at the physical layer.

The differences between RJ45 connector models mainly lie in transmission rate, structural design, protection level, and application scenarios. Different models meet diverse needs through differentiated technical parameters and physical characteristics.

In today's world, swept by a wave of digitalization, network connection technology, as the "nerve center" of information transmission, directly impacts the intelligent development of various industries with its stability and efficiency. As a core component of Ethernet communication, the RJ45 connector is experiencing unprecedented market opportunities with the development of emerging technologies such as 5G, the Internet of Things, and the Industrial Internet.

The 8 pins of an RJ45 connector transmit high-speed data through differential signaling. A 100Mbps network uses pins 1/2/3/6, while a Gigabit network uses all 8 pins. In PoE scenarios, some spare pins provide power. Correct wiring is crucial in practice, depending on network standards, cable type, and device requirements, to ensure signal stability and device compatibility.

The RJ45 connector is a standardized interface widely used in network communications, primarily for connecting Ethernet devices (such as computers, routers, and switches) to enable data transmission.