Chassis Cable Management; Spa Interface Processors And Shared Port Adapters - Cisco CRS-1 System Description

Chapter 5 Line Cards, Physical Layer Interface Modules, and Shared Port Adapters Overview

Chassis Cable Management

The line card chassis has cable-management features for the front of the chassis. These
cable-management features consist of horizontal cable-management trays above the card cage. These
trays have a special telescoping feature that allows them to be extended when the chassis is upgraded
with higher-density cards. This extension feature also helps in installing the cables in the chassis.
See the Cisco CRS Carrier Routing System 4-Slot Line Card Chassis Installation Guide for detailed
information about chassis cabling and cable management.

SPA Interface Processors and Shared Port Adapters

An optional interface solution (to PLIMs) is also available. SPA interface processors (SIPs) and shared
port adapters (SPAs) can be installed instead of PLIMs. A SIP is a carrier card that is similar to a PLIM
and inserts into a line card chassis slot and interconnects to an MSC like a PLIM. Unlike PLIMs, SIPs
provide no network connectivity on their own.
A SPA is a modular type of port adapter that inserts into a subslot of a compatible SIP carrier card to
provide network connectivity and increased interface port density. A SIP can hold one or more SPAs,
depending on the SIP type and the SPA size. POS/SDH and Gigabit Ethernet SPAs are available. For
complete SIP and SPA information, see the Cisco CRS Carrier Routing System SIP and SPA Hardware
Installation Guide.
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Cisco CRS Carrier Routing System 4-Slot Line Card Chassis System Description
Chassis Cable Management
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