rj45（rj45）.docVIP

rj45（rj45） RJ-45 interface signal definition, and network connection head signal arrangement Ethernet 10/100Base-T interface: Pin Name Description 1 TX+ Tranceive Data+ (signal +) 2, TX-, Tranceive, Data- (signal -) 3 RX+ Receive Data+ (receive signal +) 4, n/c, Not, connected (empty foot) 5, n/c, Not, connected (empty foot) 6 RX- Receive Data- (receive signal -) 7, n/c, Not, connected (empty foot) 8, n/c, Not, connected (empty foot) Ethernet 100Base-T4 interface: Pin Name Description 1 TX_D1+ Tranceive Data+ 2 TX_D1- Tranceive Data- 3 RX_D2+ Receive Data+ 4 BI_D3+ Bi-directional Data+ 5 BI_D3- Bi-directional Data- 6 RX_D2- Receive Data- 7 BI_D4+ Bi-directional Data+ 8 BI_D4- Bi-directional Data- 1 white/orange 2 orange/white 3 w/green 4 blue/w 5 w/blue 6 green/w 7 white/brown 8 brown/w RJ45 interface uses differential transmission, tx+ and tx- is a pair of feet line, cattle together, you can reduce interference. Take a look at Ethernet standard IEEE802.3 LAN interface cable standard 10Base-T: twisted pair cables generally use the RJ-45 connector; the maximum effective transmission distance is 100m from the hub, even the high quality type 5 twisted pair can only be 150m. The matching resistance is 120 euro. 10BASE5: coarse coaxial cable adopts plug-in split; adopts baseband signal; the maximum support section is 500m, and the maximum number is 100. The matching resistance is 75 euro. 10base2: fine coaxial cable. The connector uses an industrial standard BNC connector to form a t socket. The range of use is only 200 meters, and only 30 computers can be used in each section. The maximum number is 30. The matching resistance is 50 euro. 100base-tx: use more than 5 twisted pairs, and the longest segment length is 100m. 100Base-FX: when a multimode or single-mode fiber is used, the distance between the computer and the hub can be as large as 2km, and when using single-mode fiber, the maximum is 10km. 1000BASE-T: use more than 5 twisted pairs, and the longest segment leng