Cisco XR 12000 Series - Manual (Page 67)

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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
1-Port Channelized STM-16/OC-48 SPA Overview
1-Port Channelized STM-16/OC-48 SPA Cables and Connectors
The 1-Port Channelized STM-16/OC-48 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 2-24 ).
Figure 2-24 SFP Optics Module
The SFP optical transceiver modules used with the 1-Port Channelized STM-16/OC-48 SPA provide the
following optical fiber options:
• Multimode—2.488-Gbps, OC-48/STM-16 optical fiber (SONET STS-48 or SDH STM-16)
Use a multimode optical fiber that has a core/cladding diameter of 62.5/125 microns.
• Single-mode—2.488-Gbps, OC-48/STM-16 optical fiber (SONET STS-48 or SDH STM-16)
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
Figure 2-25 ) or two simplex LC-type cables, one for transmit (TX) and one for receive (RX).
Use single-mode (for intermediate- or long-reach configurations) or multimode optical fiber cable to
connect your router to a network or to connect two 1-Port Channelized STM-16/OC-48 SPA-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 the two of them.
Figure 2-25 LC Type Cables
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TX RX
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