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 service 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 Shared Port Adapters (SPAs) Version 2 addresses these needs by sharply reducing the amount of aggregation equipment and interconnectivity needed between edge and backbone routers. The Cisco 1-Port Channelized STM-1/OC-3 SPA provides Cisco 7600 and Cisco ASR 1000 and ASR 9000 Series Aggregation Services Routers with support for T1/E1 aggregation. Designed for telcos and Internet service providers (ISPs), the SPA includes one OC-3/STM-1 port, which can be configured with multiple channels of n x T1, T1, fractional T1, or DS-0 in a SONET environment or n x E1, E1, fractional E1, or 64 kbps in an SDH environment.