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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
1-Port Clear Channel OC-3, 3-Port Clear Channel OC-3, and 1-Port Clear Channel OC-12 ATM SPA Version 2 Overview
2-Port and 4-Port OC-3c/STM-1 ATM SPA Cables and Connectors
The 2-Port and 4-Port OC-3c/STM-1 ATM SPAs provide the following optical fiber options:
•
Multimode—155-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-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
Figure 3-12
) or two simplex LC-type cables, one for transmit (TX) and one for receive (RX).
Figure 3-12
Duplex Patch Cable with LC-Type Connectors
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 OC-3-equipped routers back-to-back.
Long-range SFP optics modules (for long-reach configurations) cannot be connected back-to-back
without using an attenuator between the two of them.
1-Port Clear Channel OC-3, 3-Port Clear Channel OC-3, and
1-Port Clear Channel OC-12 ATM SPA Version 2 Overview
The ATM SPA version 2 comprises these channels:
•
1-Port Clear Channel OC-3 ATM SPA Version 2 (SPA-1xOC3-ATM-V2)
•
3-Port Clear Channel OC-3 ATM SPA Version 2 (SPA-3xOC3-ATM-V2)
•
1-Port Clear Channel OC-12 ATM SPA Version 2 (SPA-1xOC12-ATM-V2)
The SPA-1xOC3-ATM-V2, SPA-3xOC3-ATM-V2, and SPA-1xOC12-ATM-V2 is a single-height SPA
that installs into one SIP subslot. The Clear Channel OC-3 ATM SPA with SFP optical transceiver
modules provides SONET and SDH network connectivity with a per-port bandwidth of 155.52 Mbps.
The Clear Channel OC-12 ATM SPA with small form-factor pluggable (SFP) optical transceiver
modules provides SONET and SDH network connectivity with a per-port bandwidth of 622 Mbps. For
more information about SPA bandwidth, see the “
Bandwidth Oversubscription
” section in this chapter.
These sections describe the SPA-1xOC3-ATM-V2, SPA-3xOC3-ATM-V2, and SPA-1xOC12-ATM-V2:
•
1-Port Clear Channel OC-3, 3-Port Clear Channel OC-3, and 1-Port Clear Channel OC-12 ATM SPA
Version 2 LEDs, page 3-19
•
1-Port Clear Channel OC-3, 3-Port Clear Channel OC-3, and 1-Port Clear Channel OC-12 ATM SPA
Version 2 Interface Specifications, page 3-20
/ /
/ /
/ /
TX
RX
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