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Cisco ASR1004 - ASR 1004 Modular Expansion Base Hardware Installation Manual page 79

Aggregation services routers sip and spa
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Chapter 3
Overview: Cisco ASR 1000 Series Aggregation Services Routers SPAs
Figure 3-23
The SFP optical transceiver modules used with the 2-Port and 4-Port OC-3c/STM-1 POS SPA provide
the following optical fiber options:
Multimode—155-Mbps, OC-3c/STM-1 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-Mbps, OC-3c/STM-1 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
Figure
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 2-Port and 4-Port OC-3c/STM-1 POS 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 them.
Figure 3-24
RX
OL-14126-12
SFP Optics Module
3-24) or two simplex LC-type cables, one for transmit (TX) and one for receive (RX).
LC-Type Cables
TX
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Hardware Installation Guide
2-Port, 4-Port, and 8-Port OC-3c/STM-1 POS SPA Overview
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