Cisco 1-port Circuit Emulation and ATM Shared Port Adapter - 1 x OC-3/STM-1
1-Port Channelized OC-3 STM-1 ATM CEoP SPA must be installed in a Cisco 7600 SIP-400 SPA interface processor (SIP) before they can be used in the Cisco 7600 series router. A maximum of four CEoP SPAs can be installed in each SIP, and these SPAs can be different models. You can install the SPA in the SIP before or after you insert the SIP into the router chassis.
Cisco 7600 SIP-200
