Cisco XR 12000 Series - Manual (Page 43)

2-13
Cisco XR 12000 Series Router SIP and SPA Hardware Installation Guide
OL-17438-04
Chapter 2 Overview: Cisco XR 12000 Series Router Shared Port Adapters
1 Port 10-Gigabit Ethernet SPA Overview
Note Referring to the RJ-45 pinout in Table 2-10 , 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 8-Port FastEthernet SPA.
The 8-Port FastEthernet 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 2-7 and Figure 2-8 .
Figure 2-7 Straight-Through Cable Pinout, RJ-45 Connection to a Hub or Repeater
Figure 2-8 Crossover Cable Pinout, RJ-45 Connections Between Routers
1 Port 10-Gigabit Ethernet SPA Overview
The following sections describe the 1-Port 10-Gigabit Ethernet SPA:
• 1-Port 10-Gigabit Ethernet SPA LEDs, page 2-14
• 1-Port 10-Gigabit Ethernet SPA XFP Optical Transceiver Modules, Connectors, and Cables,
page 2-14
Hub or LAN switch Ethernet port
3 TxD+
6 TxD–
1 RxD+
2 RxD–
3 RxD+
6 RxD–
1 TxD+
2 TxD– H7101
Router
3 TxD+
6 TxD–
1 RxD+
2 RxD–
3 TxD+
6 TxD–
1 RxD+
2 RxD– 101929
Router