The Cisco 1-Port Channelized STM-1/OC-3 SPA on the Cisco 7600 and 12000 series 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 7600 and 12000 series 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.