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 2-Port OC-3 STM-1/OC-12 STM-4 POS SPA:
2-Port OC-3 STM-1/OC-12 STM-4 POS SPA LEDs
The 2-Port OC-3 STM-1/OC-12 STM-4 POS SPA has three LEDs: two LEDs for each port on the SPA and
one STATUS LED. The following figure shows the 2-Port OC-3 STM-1/OC-12 STM-4 POS SPA faceplate.
Figure 41: 2-Port OC-3 STM-1/OC-12 STM-4 POS SPA Faceplate
STATUS LED3C/A (Carrier/Alarm) LED1
A/L (Active Loopback) LED2
The 2-Port OC-3 STM-1/OC-12 STM-4 POS SPA LEDs are described in the following table.
Table 33: 2-Port OC-3 STM-1/OC-12 STM-4 POS 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
Interface is shut down.
OffOffA/L
Port is enabled by software, loopback is off.OnGreen
Port is enabled by software, loopback is on.OnAmber
SPA power is off.
OffOffSTATUS
SPA is ready and operational.OnGreen
SPA power is on and good; SPA is being configured.OnAmber
2-Port OC-3 STM-1/OC-12 STM-4 POS SPA Interface Specifications
The framer processes incoming and outgoing SONET or SDH frames. The framer operates at OC-3 line rates
(155.52 Mbps) and OC-12 line rates (622.08 Mbps). Packet data is transported with a user-configured
encapsulation (such as Point-to-Point Protocol [PPP]) and is mapped into the layer 2 frame.
Cisco ASR 9000 Series Aggregation Services Router SIP and SPA Hardware Installation Guide
51
Overview: Cisco ASR 9000 Series Router Shared Port Adapters
2-Port OC-3 STM-1/OC-12 STM-4 POS SPA LEDs
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