Cisco 7600 SIP 200 Hardware Installation Guide - Page 71

-Port Channelized OC-12/STM-4 SPA Cables and Connectors

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Chapter 3 Overview: Cisco 7600 Series Router Shared Port Adapters 1-Port OC-12c/STM-4 ATM SPA Overview The 1-Port Channelized OC-12/STM-4 SPA interface is compliant with RFC 1619, PPP over SONET/SDH, and RFC 1662, PPP in HDLC-like Framing. The 1-Port Channelized OC-12/STM-4 SPA also provides support for SNMP v1 agent (RFC 1155-1157), and Management Information Base (MIB) II (RFC 1213). Note For Cisco IOS XR Software Release 3.8.0, the 1-Port Channelized STM-4/OC-12 SPA supports Frame Relay Fragmentation (FRF.12) to achieve fragmentation of data packets and interleaving of voice packets. FRF.12 provides a method to fragment low-priority packets and interleave high-priority packets in between the low-priority fragments to provide less delay or jitter for high-priority traffic like voice and video. Note For Cisco IOS XR Software Release 3.8.0, the 1-Port Channelized STM-4/OC-12 SPA supports Multilink Fame Relay (MFR) feature. MFR provides a mechanism for aggregating multiple serial links into a bundle to provide greater bandwidth, load balancing between links, and improved service availability by protecting against single point link failures. 1-Port Channelized OC-12/STM-4 SPA Cables and Connectors The 1-Port Channelized OC-12/STM-4 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 3-20). Figure 3-20 SFP Optics Module 127158 The SFP optical transceiver modules used with the 1-Port Channelized OC-12/STM-4 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.) OL-5052-14 Cisco 7600 Series Router SIP, SSC, and SPA Hardware Installation Guide 3-25

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3-25
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 OC-12c/STM-4 ATM SPA Overview
The 1-Port Channelized OC-12/STM-4 SPA interface is compliant with RFC 1619,
PPP over
SONET/SDH
, and RFC 1662,
PPP in HDLC-like Framing
. The 1-Port Channelized OC-12/STM-4 SPA
also provides support for SNMP v1 agent (RFC 1155–1157), and Management Information Base (MIB)
II (RFC 1213).
Note
For Cisco IOS XR Software Release 3.8.0, the 1-Port Channelized STM-4/OC-12 SPA supports Frame
Relay Fragmentation (FRF.12) to achieve fragmentation of data packets and interleaving of voice
packets. FRF.12 provides a method to fragment low-priority packets and interleave high-priority packets
in between the low-priority fragments to provide less delay or jitter for high-priority traffic like voice
and video.
Note
For Cisco IOS XR Software Release 3.8.0, the 1-Port Channelized STM-4/OC-12 SPA supports
Multilink Fame Relay (MFR) feature. MFR provides a mechanism for aggregating multiple serial links
into a bundle to provide greater bandwidth, load balancing between links, and improved service
availability by protecting against single point link failures.
1-Port Channelized OC-12/STM-4 SPA Cables and Connectors
The 1-Port Channelized OC-12/STM-4 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 3-20
).
Figure 3-20
SFP Optics Module
The SFP optical transceiver modules used with the 1-Port Channelized OC-12/STM-4 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.)
127158