The Cisco SPA-1CHOC3-CE-ATM 1-Port Channelized OC3/STM-1 Circuit Emulation Over Packet Port Adapter is a network interface module designed for high-end Cisco routing platforms. 

Overview: The Cisco SPA-1CHOC3-CE-ATM provides channelized OC3/STM-1 connectivity with circuit emulation capabilities over packet networks. Here are some key points:

• • Service Flexibility: This SPA allows network administrators to use their existing IP/MPLS network for leased-line emulation services or to carry data streams that don’t conform to other multiservice platform interfaces.
  • Protocol Independence: The SPA offers bit-transparent data transport that is completely protocol-independent. It can handle arbitrary bit streams without predefined format requirements.
  • CESoPSN and SAToP: The SPA meets emerging standards for Circuit Emulation Services over Packet Switched Network (CESoPSN) and Structure-Agnostic Transport over Packet (SAToP). In SAToP mode, it treats data as an arbitrary bit stream encapsulated in IP/MPLS packets. In CESoPSN mode, it adheres to a defined format.
  • Low-Speed ATM Services: The SPA can also be used for low-speed ATM services, including Inverse Multiplexing over ATM (IMA).

Benefits:

• • Network Scalability: Available on high-end Cisco routing platforms, the SPA offers network scalability with lower initial costs and ease of upgrades.
  • Investment Protection: The Cisco SPA/SIP portfolio ensures investment protection by supporting consistent features, broad interface availability, and the latest technology.
  • I-Flex Design: The I-Flex design combines shared port adapters (SPAs) and SPA interface processors (SIPs), maximizing connectivity options and offering superior service intelligence while reducing overall cost of ownership.

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