8-Port OC-12 STM-4 POS SPA Overview
The 8-Port OC12/STM4 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 an OC-12 SFP module, so the per-port bandwidth can be 622.08 Mbps.
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.
Note
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 OC12/STM4 SPA LEDs
The 8-Port OC12/STM4 SPA has three types of LEDs: two LEDs for each port on the SPA and one STATUS
LED. The following figure shows the 8-Port OC12/STM4 SPA faceplate.
Figure 15: 8-Port OC12/STM4 SPA Faceplate
STATUS LED3C/A (Carrier/Alarm) LED1
A/L (Active/Loopback) LED2
The following table describes the 8-Port OC12/STM4 SPA LEDs.
Table 15: 8-Port OC12/STM4 SPA LEDs
MeaningStateColorLED Label
SONET controller is shut down.OffOffC/A
Port is enabled by software, and there is a valid SONET signal without any alarms.OnGreen
Port is enabled by software, and there is at least one alarm.OnAmber
Cisco ASR 9000 Series Aggregation Services Router SIP and SPA Hardware Installation Guide
22
Overview: Cisco ASR 9000 Series Router Shared Port Adapters
8-Port OC-12 STM-4 POS SPA Overview
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