Cisco 7600 SIP 200 Hardware Installation Guide - Page 96

4-Port and 8-Port Fast Ethernet SPA Overview Chapter 3 Overview: Cisco 7600 Series Router Shared Port Adapters Cables, Connectors, and Pinouts The interface connectors on the 4-Port and 8-Port Fast Ethernet SPA are four or eight individual RJ-45 receptacles. You can use all interface connectors simultaneously. Each connection supports IEEE 802.3 and Ethernet 10/100BASE-T interfaces compliant with appropriate standards. Cisco Systems does not supply Category 5 unshielded twisted-pair (UTP) RJ-45 cables; these cables are available commercially. Figure 3-42 shows the RJ-45 connector. Table 3-24 lists the pinouts and signals for the RJ-45 connector. Figure 3-42 RJ-45 Connections, Plug, and Receptacle 248373 8 7 6 5 4 3 2 1 RJ-45 connector Table 3-24 RJ-45 Connector Pinout Pin Description 1 Transmit data + (TxD+) 2 TxD- 3 Receive data + (RxD+) 6 RxD- Note Referring to the RJ-45 pinout in Table 3-24, proper common-mode line terminations should be used for the unused Category 5 UTP cable pairs 4/5 and 7/8. Common-mode termination reduces the contributions to electromagnetic interference (EMI) and susceptibility to common-mode sources. Wire pairs 4/5 and 7/8 are actively terminated in the RJ-45 port circuitry in the 4-Port and 8-Port Fast Ethernet SPA. The 4-Port and 8-Port Fast Ethernet SPA supports automatic MDI/MDIX crossover at all speeds of operation allowing the SPA to work with straight-through and crossover Ethernet cables. Depending on your RJ-45 interface cabling requirements, use the pinouts in Figure 3-43 and Figure 3-44. Figure 3-43 Straight-Through Cable Pinout, RJ-45 Connection to a Hub or Repeater Hub or LAN switch 3 TxD+ 6 TxD- Ethernet port 3 RxD+ 6 RxD- H7101 1 RxD+ 2 RxD- 1 TxD+ 2 TxD- 3-50 Cisco 7600 Series Router SIP, SSC, and SPA Hardware Installation Guide OL-5052-14