Cisco XR 12000 Series - Manual (Page 77)

2-47
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
2-Port and 4-Port OC-3/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 2-Port and 4-Port OC-3/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
2-Port and 4-Port OC-3/STM-1 POS SPA Optical Transceiver Modules and
Cables
The 2-Port and 4-Port OC-3/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 2-33 ).
Cisco Systems qualifies the optics that are approved for use with its SPAs. The 2-Port and 4-Port
OC-3/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
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.
Table 2-34 2-Port and 4-Port OC-3/STM-1 POS SPA LEDs (continued)
LED Label Color State Meaning