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Overview: Cisco ASR 9000 Series Router Shared Port Adapters
8-Port OC-3/STM-1 POS SPA Optical Transceiver Modules and Cables
The 8-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 connections (see the
following figure).
Cisco Systems qualifies the optics that are approved for use with its SPAs. The following OC-3 optical
transceiver modules are supported on the 8-Port OC-3/STM-1 POS SPA:
• 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
Figure 32: SFP Optics Module
The following OC-3 optical fiber options are available for the 8-Port OC-3/STM-1 POS SPA:
• Multimode—155.52-Mbps, OC-3 optical fiber (SONET STS-3c or SDH STM-1)
Use a multimode optical fiber that has a core/cladding diameter of 62.5/125 microns.
• Single-mode—155.52-Mbps, OC-3 optical fiber (SONET STS-3c or SDH STM-1)
Use a single-mode optical fiber that has a modal-field diameter of 8.7 ± 0.5 microns. (Nominal diameter is
approximately 10/125 microns.)
For single-mode and multimode optical fiber connections, you can use either a duplex LC-type cable (see the
below figure) or two simplex LC-type cables, one for transmit (TX) and one for receive (RX).
Use single-mode (for short-, intermediate- or long-reach configurations) or multimode optical fiber cable to
connect your router to a network or two OC-3-equipped or OC-12-equipped routers back-to-back.
Long-range SFP optical transceiver modules (for long-reach configurations) cannot be connected back-to-back
without using an attenuator between them.
Figure 33: LC-Type Cable
Cisco ASR 9000 Series Aggregation Services Router SIP and SPA Hardware Installation Guide
8-Port OC-3/STM-1 POS SPA Optical Transceiver Modules and Cables
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