H3C S12500-X Series Installation Manual

Also see for S12500-X: Card Manual Manual Command reference Configuration guide Configuration Examples

124Pin assignmentsSelect an Ethernet twisted pair cable according to the RJ-45 Ethernet interface type on your device. AnRJ-45 Ethernet interface can be MDI (for routers and PCs) or MDIX (for switches). For the pinouts of RJ-45Ethernet interfaces, see Table 70 and Table 71.Table 70 RJ-45 MDI interface pinoutsPin 10Base-T/100Base-TX 1000Base-TSignal Function Signal Function1 Tx+ Send data BIDA+ Bi-directional data cable A+2 Tx- Send data BIDA- Bi-directional data cable A-3 Rx+ Receive data BIDB+ Bi-directional data cable B+4 Reserved N/A BIDC+ Bi-directional data cable C+5 Reserved N/A BIDC- Bi-directional data cable C-6 Rx- Receive data BIDB- Bi-directional data cable B-7 Reserved N/A BIDD+ Bi-directional data cable D+8 Reserved N/A BIDD- Bi-directional data cable D-Table 71 RJ-45 MDI-X interface pinoutsPin 10Base-T/100Base-TX 1000Base-TSignal Function Signal Function1 Rx+ Receive data BIDB+ Bi-directional data cable B+2 Rx- Receive data BIDB- Bi-directional data cable B-3 Tx+ Send data BIDA+ Bi-directional data cable A+4 Reserved N/A BIDD+ Bi-directional data cable D+5 Reserved N/A BIDD- Bi-directional data cable D-6 Tx- Send data BIDA- Bi-directional data cable A-7 Reserved N/A BIDC+ Bi-directional data cable C+8 Reserved N/A BIDC- Bi-directional data cable C-To ensure normal communication, the pins for sending data on one port should correspond to the pins forreceiving data on the peer port. When both of the ports on the two devices are MDI or MDIX, a crossoverEthernet cable is needed. A cross-over cable connects devices of the same type. When one port is MDIand the other is MDIX, a straight-through Ethernet cable is needed. A straight-through cable connectsdevices of different types.An RJ-45 Ethernet interface with MDI/MDIX autosensing enabled can automatically negotiate pin roles.The S12500-X RJ-45 Ethernet interfaces support MDI/MDIX. By default, MDI/MDIX is enabled on a port.Making an Ethernet twisted pair cable1. Cut the cable to length with the crimping pliers.