Cisco ESR-HH-4CT3 : 4 port Channelized T3 Half-Slot Line Card

Coupled with native edge-aggregation services such as high availability, Multiprotocol Label Switching (MPLS), and quality of service (QoS), the Cisco 10000 Series 4-Port Half-Height Channelized T3 Module provides a comprehensive set of enhanced aggregation services, including higher port density per Cisco 10000 line-card slot, 1:1 line-card failover protection through Y-cables, and enhanced bit error rate testing (BERT) and loopback testing capabilities.
Using channelized interfaces to receive multiplexed T1 circuits on a single pair of coaxial cables, service providers can save dramatically on power, floor space, local-loop charges, and equipment costs. The Cisco 4-port half-height CT3 module can accept both clear-channel T3 traffic and multiplexed circuits from T1 and N x DS-0.
With this combination of features and performance, Cisco Systems® provides a versatile interface for an upgrade to the advanced network architectures provided by Cisco 10000 Series routers. Service provider points of presence (POPs) can use the 4-port half-height CT3 line card to enable rapid, efficient addition of circuits where density, performance, and high availability are required.