Cisco XR 12000 Series Manual de usuario descargar pdf (Pagina 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

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Cisco XR 12000 Series Manual de usuario Pagina 43