What is RJ45?
Electrical interface is a general term for all kinds of twisted pair interfaces such as RJ45 in servers and networks. It mainly refers to copper cable, including common network cable and RF coaxial cable. It is the key to process electrical signals. Because these ports all use electricity as the information carrying medium, they are collectively referred to as electrical ports. The commonly used network interfaces are 100 MB port and Gigabit port.
Electric port is relative to optical port, which refers to the physical characteristics of fireproof device. It is the general name of RJ45 and other twisted pair interfaces in server and network. Generally speaking, it is parallel wire (network cable) and RF coaxial cable. The commonly used network interfaces are 100 MB port and Gigabit port.
According to the standard of IEEE802.3, 100base can be divided into optical port and electrical port. The electrical port distance is 100 meters. The optical port is divided into single-mode and multi-mode. The single-mode optical port has 100baselx and 100basezx, and the multi-mode optical port is 100BaseFX. Fe port only represents 100M Ethernet, while electrical port and optical port are the interface categories of services, not the same concept. 100M Ethernet interface can be connected by cable port and cable for transmission, and can also be connected by optical module and optical fiber for signal transmission. In short, the electrical interface is the common twin pair interface, the general speed is 10m or 100m, some support 1000m. The longest distance of the electrical interface is 100m.
For network communication, generally below 155Mb / S is the electrical interface, but above 155Mb / s, the electrical interface can not reach the transmission speed, so the optical interface must be used.
Advantage:
Port has a modern plug plating hard gold process, the advantage of this process is to ensure or greatly guarantee the repeated plug has excellent connectivity, port module late failure rate is low because of this, by strictly controlling the thickness of gold plating of each product to achieve superior quality, excellent connection quality also ensures the super applicability and durability of the port module.
The optical module of SFPs is a kind of interface device which converts the electrical signal into optical signal, It is the industry standard small pluggable gigabit optical transceiver integrated module, which can be plugged into the SFP port of network equipment such as switches, routers, media converters, etc. it is used to connect optical or copper network cables for data transmission. Usually we can find it in Ethernet switches, routers, firewalls and network interface cards.
What is the SFP port?
SFPs are commonly used in switches, routers, media converters and other network devices. SFPs are mainly used for signal conversion and data transmission. Their ports meet the IEEE 802.3ab standard, and the maximum transmission distance can reach 1000 Mbps (the switch's SFPs support 100 / 1000 Mbps).
As a hot swap I / O interface (I / O interface), it has strong flexibility and is suitable for a variety of products. For example, it can exchange with ports of 1000base-sx, 1000base-lx / LH, 1000base-zx or 1000base-bx10-d / u. in addition, it can be downward compatible and support 10 / 100 / 1000Mbps.
Advantage:
Fast Ethernet, ATM, Gigabit Ethernet, FDDI and other LAN backbone technologies have been widely used before.
Selection principle of RJ45 electric port and SFP optical port
First, both ports are used to transmit Gigabit rates. However, when the transmission distance is more than 100 meters, we should choose the optical port and optical module instead of RJ45 port and copper cable.
When the transmission distance is less than 100 meters, the following aspects should be considered in the selection of the two
1. Security: in a relatively harsh environment, optical modules are safer than copper wires. Because the electrical signal in copper wire is easy to cause fire or lightning.
2. Reliability: because the basic component of optical fiber is quartz, which only transmits light and does not conduct electricity, the optical signal transmitted in it is not affected by electromagnetic field, so the optical fiber transmission has strong resistance to electromagnetic interference and industrial interference. Because of this, the signal transmitted in the optical fiber is not easy to be eavesdropped, so it is conducive to confidentiality. The copper wire of RJ45 interface often produces crosstalk in current transmission, which is usually called electromagnetic interference. It refers to the interference of power equipment, such as some high-voltage wires, to other electronic products around when they work. So fiber has an advantage over copper in this respect.
3. Network upgrade requirements: if there is a demand for bandwidth upgrade in the future, the optical fiber jumper has more advantages than the network cable with class 5 / 6 RJ45 interface.
4. Cost: the actual working speed of the two is the same, but the copper port will be a more cost-effective choice, because the copper wire is cheap, and the optical port needs to be used with the optical module and optical fiber jumper, which will be an expense.
What's the difference between electric port and Ethernet port?
1. Different characteristics: the electrical port refers to the self physical characteristics, which is the electrical signal 5261 processed by 2113. Ethernet port is a layer-2 feature of 4102, which processes the data of Ethernet 1653.
2. The meaning is different: the electric port is the general name of RJ45 and other twisted pair interfaces in the server and network, sometimes it also includes coaxial cable port.
3. The common interface is different: usually the electrical interface may use 100 Gigabit Ethernet, Gigabit Ethernet, 10 Gigabit Ethernet or other kinds of transmission protocols. Common Ethernet interface types include RJ-45 interface, RJ-11 interface, SC optical fiber interface, FDDI interface, AUI interface, BNC interface and console interface.
HTF's products are customized, the quality is guaranteed, and the accessories are imported.
Contact: support@htfuture.com
Skype :sales5_ 1909，WeChat ：16635025029
