The new family of shared port adapters (SPAs) from Cisco Systems heralds a new era for cost-effective and flexible WAN connectivity across high-end Cisco routing platforms. Enterprise customers and service providers can take advantage of a variety of SPAs for their WAN aggregation and connectivity options, as well as the increased scalability, performance, and rich QoS features offered by the SPA Interface Processor (SIP) carrier cards. The SPA and SIP architecture offers customers a highly modular solution with lower initial costs, easy upgrades, and investment protection.Today's successful businesses require more bandwidth and feature-rich services to maintain a competitive advantage. To serve these business customers better, service providers need scalable solutions that not only increase agility and flexibility, but also reduce overall network complexity, the time required to provision new services, and the total cost of ownership.The Cisco 1-Port Channelized STM-1/OC-3 SPA on the Cisco routers provides the solution that service providers and their customers need. It reduces network complexity and provisioning time and is part of the industry's most widely deployed and trusted network platforms today. The Cisco 1-Port Channelized STM-1/OC-3 SPA provides Cisco routers support for T1/E1 aggregation. Designed for telcos and Internet service providers (ISPs), this card supports one OC-3/STM-1 port, which can be configured with multiple channels of NxT1, T1, fractional T1, or DS-0 in a SONET environment or NxE1, E1, fractional E1, or 64 kbps in an SDH environment.The Cisco 1-Port Channelized STM-1/OC-3 SPA is hot-swappable and supports service-transparent online insertion and removal (OIR), allowing the SPA to be removed without impacting the carrier card and other SPAs.