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Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Hardware Installation Guide
OL-14126-12
Chapter 3 Overview: Cisco ASR 1000 Series Aggregation Services Routers SPAs
5-Port Gigabit Ethernet SPA Overview
Figure 3-16 RJ-45 Connector Pinouts, Plug, and Receptacle
Note Referring to the RJ-45 pinout in Table 3-11, 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 2-Port Copper and Optical
Gigabit Ethernet SPA.
The 2-Port Copper and Optical Gigabit Ethernet SPA supports automatic MDI/MDIX crossover at all
speeds of operation allowing the SPA to work with straight-through and crossover Ethernet cables.
5-Port Gigabit Ethernet SPA Overview
The following sections describe the 5-Port Gigabit Ethernet SPA:
• 5-Port Gigabit Ethernet SPA LEDs, page 3-20
• 5-Port Gigabit Ethernet SPA Connectors, page 3-22
5-Port Gigabit Ethernet SPA LEDs
The 5-Port Gigabit Ethernet SPA has two types of LEDs: an A/L LED for each port on the SPA, and one
STATUS LED, as shown in Figure 3-17.
Table 3-11 RJ-45 Connector Pinouts
Pin Description
1 DA_P (bidirectional pair A, plus)
2 DA_N (bidirectional pair A, minus)
3 DB_P (bidirectional pair B, plus)
4 DC_P (bidirectional pair C, plus)
5 DC_N (bidirectional pair C, minus)
6 DB_N (bidirectional pair B, minus)
7 DD_P (bidirectional pair D, plus)
8 DD_N (bidirectional pair D, minus)
205060
8 7 6 5 4 3 2 1
RJ-45 connector
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