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Cisco 7600 Series Router SIP, SSC, and SPA Hardware Installation Guide
OL-5052-14
Chapter 3 Overview: Cisco 7600 Series Router Shared Port Adapters
2-Port and 4-Port OC-3c/STM-1 ATM SPA Overview
The SFP optical transceiver modules used with the 1-Port Channelized STM-4/OC-12 SPA provide the
following optical fiber options:
•
Multimode—622-Mbps, OC-12/STM-4 optical fiber (SONET STS-12 or SDH STM-4)
Use a multimode optical fiber that has a core/cladding diameter of 62.5/125 microns.
•
Single-mode—622-Mbps, OC-12/STM-4 optical fiber (SONET STS-12 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 (see
Figure 3-10
) 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-4/OC-12 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 3-10
LC Type Cables
2-Port and 4-Port OC-3c/STM-1 ATM SPA Overview
The following sections describe the 2-Port and 4-Port OC-3c/STM-1 ATM SPA:
•
2-Port and 4-Port OC-3c/STM-1 ATM SPA LEDs, page 3-17
•
2-Port and 4-Port OC-3c/STM-1 ATM SPA Interface Specifications, page 3-17
•
2-Port and 4-Port OC-3c/STM-1 ATM SPA Cables and Connectors, page 3-18
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TX
RX
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