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Cisco CRS-1 Carrier Routing System SIP and SPA Hardware Installation Guide
OL-7113-05
Chapter 3 Overview: Cisco CRS-1 Shared Port Adapters
4-Port OC-3c/STM-1 POS SPA Overview
Table 3-3 describes the 4-Port OC-3c/STM-1 POS SPA LEDs.
4-Port OC-3c/STM-1 POS SPA Interface Specifications
The framer processes incoming and outgoing SONET or SDH frames. The framer operates at
OC-3c/STM-1 line rates (155.52 Mbps).
Packet data is transported with a user-configured encapsulation (such as Point-to-Point Protocol [PPP])
and is mapped into the STS-3c/STM-1 frame.
The 4-Port OC-3c/STM-1 POS SPA interface complies with the following RFCs:
• RFC 1662, PPP in HDLC-like Framing
• RFC 2427, Multiprotocol Interconnect over Frame Relay
• RFC 2615, PPP over SONET/SDH
4-Port OC-3c/STM-1 POS SPA Optical Transceiver Modules and Cables
The 4-Port OC-3c/STM-1 POS SPA uses a small form-factor pluggable (SFP) optical transceiver module
installed in each port for SONET and SDH single-mode and multimode optical fiber connection (see
Figure
3-3).
Cisco Systems qualifies the optics that are approved for use with its SPAs. The 4-Port OC-3c/STM-1
POS SPA supports the following types of optical transceiver modules:
• Multimode (MM) SFP module—SFP-OC3-MM
• Short-reach (SR) SFP module—SFP-OC3-SR
• Intermediate-reach (IR) SFP module (15 km)—SFP-OC3-IR1
• Long-reach (LR) SFP module (40 km)—SFP-OC3-LR1
• Long-reach (LR) SFP module (80 km)—SFP-OC3-LR2
Ta b l e 3-3 4-Port OC-3c/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.
STATUS Off Off SPA power is off.
Green On SPA is ready and operational.
Amber On SPA power is on and good, and the SPA is being configured.