Figure 39: SFP Optics Module
The 1-Port Clear Channel OC-12 ATM SPA provides the following optical fiber options:
• Multimode—622.08-Mbps, OC-12 optical fiber (SONET STS-12c or SDH STM-4)
Use a multimode optical fiber that has a core/cladding diameter of 62.5/125 microns.
• Single-mode—622.08-Mbps, OC-12 optical fiber (SONET STS-12c or SDH STM-4)
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 or two
simplex LC-type cables, one for transmit (TX) and one for receive (RX).
Figure 40: Duplex Patch Cable with LC-Type Connectors
2-Port OC-3 STM-1/OC-12 STM-4 POS SPA Overview
The 2-Port OC-3 STM-1/OC-12 STM-4 POS SPA is a single-height OC-12 SPA that can be installed into
one SIP subslot. The OC-12 SPA with small form-factor pluggable (SFP) optical transceiver modules provides
SONET and SDH network connectivity. Since any given channel can be configured as either OC-3 or OC-12,
so the per-port bandwidth can be either 155.52 Mbps or 622.08 Mbps respectively, depending on the type of
small form-factor pluggable (SFP) optical transceiver module installed.
When SFP modules are replaced, the SPA interface retains any previously-defined configurations. This
includes settings for IP address, clock source, loopback, CRC, and POS flags.
Note
The 2-Port OC-3 STM-1/OC-12 STM-4 POS SPA is a half rate SPA.
Cisco ASR 9000 Series Aggregation Services Router SIP and SPA Hardware Installation Guide
50
Overview: Cisco ASR 9000 Series Router Shared Port Adapters
2-Port OC-3 STM-1/OC-12 STM-4 POS SPA Overview
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