Cisco XR 12000 Series - Manual (Page 76)

2-46
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
4-Port OC-3/STM-1 POS SPA Overview
Note When SFP modules are replaced, the SPA interface retains any previously defined configurations. These
configurations include settings for IP address, clock source, loopback, Cyclic Redundancy Check
(CRC), and POS flags.
For more information about SPA bandwidth, see the “Bandwidth Oversubscription” section in this
chapter. For more information about SPAs and their compatibility with SIPs and modular optics, see the
“SIP and SPA Product Overview” chapter in this guide.
The following sections describe the 2-Port and 4-Port OC-3/STM-1 POS SPA:
• 2-Port and 4-Port OC-3/STM-1 POS SPA LEDs, page 2-46
• 2-Port and 4-Port OC-3/STM-1 POS SPA Interface Specifications, page 2-47
• 2-Port and 4-Port OC-3/STM-1 POS SPA Optical Transceiver Modules and Cables, page 2-47
2-Port and 4-Port OC-3/STM-1 POS SPA LEDs
The 2-Port and 4-Port OC-3/STM-1 POS SPA has three types of LEDs: two LEDs for each port on the
SPA and one STATUS LED.
Figure 2-32 shows the 4-Port OC-3/STM-1 POS SPA.
Figure 2-32 4-Port OC-3/STM-1 POS SPA Faceplate
Table 2-34 describes the 2-Port and 4-Port OC-3/STM-1 POS SPA LEDs.
1 C/A (Carrier/Alarm) LED 3 STATUS LED
2 A/L (Active/Loopback) LED
ST
ATUS
0 1 2 3
A/L
C/A
A/L
C/A
A/L
C/A
A/L
C/A
122938
1
2 3
Table 2-34 2-Port and 4-Port OC-3/STM-1 POS SPA LEDs
LED Label Color State Meaning
C/A Off Off SONET controller is shut down.
Green On Port is enabled by software, and there is a valid SONET signal
without any alarms.
Amber On Port is enabled by software, and there is at least one alarm.
A/L Off Off Interface is shut down.
Green On Port is enabled by software, and loopback is off.
Amber On Port is enabled by software, and loopback is on.