vendredi 16 mars 2012

pin du rj45

Ethernet 10/100/1000Base-T Straight Thru

Wiring scheme: EIA/TIA 568B
This cable will work with 10Base-T, 100Base-TX and 1000Base-T and is used to connect a network interface card to a hub or network outlet. These cables are sometimes called "whips".
Note: While 10BaseT and 100Base-TX only uses two pairs, please do connect all pairs since 1000BaseT uses all of them, and save yourself some future debugging :)


RJ45 MALE CONNECTOR to network interface card.
Name Pin Cable Color Pin Name
TX+ 1 White/Orange 1 TX+
TX- 2 Orange 2 TX-
RX+ 3 White/Green 3 RX+
4 Blue 4
5 White/Blue 5
RX- 6 Green 6 RX-
7 White/Brown 7
8 Brown 8
Note: It's important that each pair is kept as a pair. TX+ & TX- must be in the pair, and RX+ & RX- must together in another pair. (Just as the table above shows).
Just for your information, this is how the pairs are named:
Pair Pins Common color
1 4 & 5 Blue
2 1 & 2 Orange
3 3 & 6 Green
4 7 & 8 Brown
The + side of each pair is called the "tip" and the - side is called the "ring", a reference to old telephone connectors.
RS232D uses RJ45 type connectors (similar to telephone connectors)
Pin No. Signal Description Abbr. DTE DCE
1 DCE Ready, Ring Indicator DSR/RI «— —»
2 Received Line Signal Detector DCD «— —»
3 DTE Ready DTR —» «—
4 Signal Ground SG
5 Received Data RxD «— —»
6 Transmitted Data TxD —» «—
7 Clear To Send CTS «— —»
8 Request To Send RTS —» «—

This is made possible because of the wasteful (some may say "spare") wires in cat-5 cable.

Cat 5 cable and RJ-45 jacks have eight wires.
Ethernet uses two pairs (four wires), one for send and one for receive.

Aucun commentaire:

Enregistrer un commentaire

Nombre total de pages vues