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Cisco 7600 Series Router SIP, SSC, and SPA Hardware Installation Guide
OL-5052-08
Chapter 3 Overview: Cisco 7600 Series Router Shared Port Adapters
4-Port and 8-Port Fast Ethernet SPA Overview
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 3-32
shows the RJ-45 connector.
Table 3-21
lists the pinouts and signals for the RJ-45 connector.
Figure 3-32
RJ-45 Connections, Plug, and Receptacle
Note
Referring to the RJ-45 pinout in
Table 3-21
, 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.
Table 3-20
8-Port FastEthernet SPA LEDs
LED Label
Color
State
Meaning
Port Number
Active/Link
(0, 1, 2, 3, 4, 5, 6
or 7)
1
1.
In this case, port number refers to the numbered LEDs on the 8-Port FastEthernet SPA (0, 1, 2, 3, 4, 5, 6 or 7). Each LED
number on the 8-Port FastEthernet SPA references a port on the SPA.
Green
On
The port is enabled and the link is up.
Amber
On
The port is enabled and the link is down.
Off
Off
The port is disabled.
STATUS
Green
On
The SPA is online.
Amber
On
The SPA is receiving power and bootstrapping.
Off
Off
The SPA is offline and deactivated.
Table 3-21
RJ-45 Connector Pinout
Pin
Description
1
Transmit data + (TxD+)
2
TxD–
3
Receive data + (RxD+)
6
RxD–
H2936
8 7 6 5 4 3 2 1
RJ-45 connector
