The CEoP SPAs are single-width, single-height, cross-platform Circuit Emulation over Packet (CEoP) shared port adapters (SPAs) for Cisco 7600 series routers. CEoP SPAs come in the following models:
• 24-Port Channelized T1/E1 ATM CEoP SPA (SPA-24CHT1-CE-ATM=)
• 2-Port Channelized T3/E3 ATM CEoP SPA (SPA-2CHT3-CE-ATM=)
• 1-Port Channelized OC-3 STM1 ATM CEoP SPA (SPA-1CHOC3-CE-ATM=)
The 24-Port Channelized T1/E1 ATM CEoP SPA and 1-Port Channelized OC-3 STM1 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. This allows you to perform online insertion and removal (OIR) operations either by removing individual SPAs from the SIP, or by removing the entire SIP (and its contained SPAs) from the router chassis.
Pseudowire Emulation over Packet (PWEoP) is one of the key components to migrate customers to a packet-based multi-service network. Circuit Emulation over Packet (CEoP) is a subset of PWEoP and is a technology to migrate to all-packet networks from legacy TDM networks, yet providing transport for legacy applications transparently over a packet network. CEoP is the imitation of a physical connection.
Many service providers and enterprises operate both packet switched networks and time division multiplexed (TDM) networks. These service providers and enterprises have moved many of their data services from the TDM network to their packet network for scalability and efficiency. Cisco provides routing and switching solutions capable of transporting Layer 2 and Layer 3 protocols such as Ethernet, IP, and Frame Relay. While most applications and services have been migrated to the packet-based network, some, including voice and legacy applications, still rely on a circuit or leased line for transport.
CEoP SPAs implement Circuit Emulation over Packet by transporting circuits over a packet-based network. CEoP SPAs help service providers and enterprises migrate to one packet network capable of efficiently delivering both data and circuit services. CEoP SPAs also support ATM and ATM pseudowire.

Specifications

Cisco SPA-24CHT1-CE-ATM 7600 24-Port Channelized T1/E1/J1 ATM CEoP Port Adapter. 

Purpose and Connectivity:

• • The SPA-24CHT1-CE-ATM is designed for circuit emulation over packet (CEoP) and ATM services.
  • It provides 24 channelized T1/E1/J1 ports for versatile connectivity.
  • These ports can be used for bit-transparent data transport, making them protocol-independent and suitable for various applications.

Features:

• • Jitter and Wander Compliance: The adapter adheres to ITU G.823/824 standards for traffic interfaces.
  • I-Flex Design: Leveraging shared port adapters (SPAs) and SPA interface processors (SIPs), it prioritizes voice, video, and data services. The I-Flex design enhances connectivity options and offers programmable interface processors for line-rate performance.
  • CESoPSN and SAToP Support: The SPA meets emerging standards for Circuit Emulation Services over Packet Switched Network (CESoPSN) and Structure-Agnostic Transport over Packet (SAToP) transport.
  • Flexible Deployment: Different interfaces (such as Packet over SONET/SDH, ATM, Ethernet) can be deployed on the same interface processor.

Applications:

• • Mobile Networks: It transports 2G and 3G network traffic over packet networks for mobile operators.
  • Leased-Line Emulation: Network administrators can use existing IP/MPLS networks to provide leased-line emulation services.
  • Low-Speed ATM Services: The SPA supports low-speed ATM services, including Inverse Multiplexing for ATM (IMA).