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Cisco 7304 Router Modular Services Card and Shared Port Adapter Hardware Installation Guide
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Chapter 3 Overview: Cisco 7304 Router Shared Port Adapters
OC-3 POS SPA Overview
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-3c/STM-1 POS SPA interface is compliant with the following RFCs:
• RFC 1619, PPP over SONET/SDH
• RFC 1662, PPP in HDLC-like Framing
The 2-Port and 4-Port OC-3c/STM-1 POS SPA also provides support for SNMP agent v1
(RFC 1155–1157) and RFC 1213:
• RFC 1155, Structure and Identification of Management Information for TCP/IP-based Internets
• RFC 1156, Management Information Base for Network Management of TCP/IP-Based Internets
• RFC 1157, Simple Network Management Protocol (SNMP)
• RFC 1213, Management Information Base (MIB) for Network Management of TCP/IP-Based
Internets:MIB II.
2-Port and 4-Port OC-3c/STM-1 POS SPA Optical Transceiver Modules and
Cables
The 2-Port and 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 3-9).
Cisco Systems qualifies the optics that are approved for use with its SPAs. The 2-Port and 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
• LR SFP module (80 km)—SFP-OC3-LR2
Figure 3-9 SFP Optics Module
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