2-49
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
8-Port OC-3 STM-1/OC-12 STM-4 POS SPA Overview
8-Port OC-3 STM-1/OC-12 STM-4 POS SPA Overview
The 8-Port OC-3 STM-1/OC-12 STM-4 POS SPA is a single-height SPA that installs into one SIP
subslot. The SPA with small form-factor pluggable (SFP) optical transceiver modules provides Optical
Carrier Level (OC-n) for SONET and Synchronous Transport Module (STM-n) for SDH network
connectivity. On this SPA, any given port can use either an OC-3 or OC-12 SFP module, so the per-port
bandwidth can be either 155.52 Mbps or 622.08 Mbps, respectively, depending on the customer
configuration.
Note When SFP modules are replaced, the SPA interface retains any previously defined configurations. These
configurations include settings for IP address, clock source, loopback, CRC, and POS flags.
For more information about SPA bandwidth, see the “Bandwidth Oversubscription” topic 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 8-Port OC-3 STM-1/OC-12 STM-4 POS SPA:
• 8-Port OC-3 STM-1/OC-12 STM-4 POS SPA LEDs, page 2-49
• 8-Port OC-3 STM-1/OC-12 STM-4 POS SPA Interface Specifications, page 2-50
• 8-Port OC-3 STM-1/OC-12 STM-4 POS SPA Optical Transceiver Modules and Cables, page 2-50
8-Port OC-3 STM-1/OC-12 STM-4 POS SPA LEDs
The 8-Port OC-3 STM-1/OC-12 STM-4 POS SPA has three types of LEDs: two LEDs for each port on
the SPA and one STATUS LED. Figure 2-34 shows the 8-Port OC-3 STM-1/OC-12 STM-4 POS SPA
faceplate.
Figure 2-34 8-Port OC-3 STM-1/OC-12 STM-4 POS SPA Faceplate
1 C/A (Carrier/Alarm) LED 3 STATUS LED
2 A/L (Active/Loopback) LED
STAT U S
SPA-8XOC12-POS
138896
3
3
C/A
A/L
0
C/A
A/L
1
C/A
A/L
2
C/A
A/L
21
4
C/A
A/L
5
C/A
A/L
6
C/A
A/L
7
C/A
A/L
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