Ciena's CN 3000 Series Ethernet Access products are carrier-class solutions for delivering Ethernet business services across both fiber- and copper-based access networks. The Ethernet-over-TDM solutions allow service providers to extend standard Ethernet services to almost any customer—including off-net and out-of-region locations—by providing Ethernet service delivery over existing TDM-based access networks. Leveraging the inherent reliability of TDM infrastructures, the CN 3000 Series includes products for PDH (T1/E1 and T3/E3) and SONET/SDH (OC-3/STM-1) networks.
 
Ciena’s Ethernet-over-TDM products include Network Termination Equipment (NTE) located at the customer premises and complimentary NTE Aggregators that reside in the central office. The NTE provides intelligent demarcation between customer and carrier networks and supports Ethernet Operations, Administration and Maintenance (OAM) for traffic management and performance monitoring, enabling end-to-end service monitoring and Service Level Agreement (SLA) verification. The NTE can be managed fully from remote locations, providing tremendous savings on operational expenses.

PDH
Model	Subscriber	Network
CN 3208	2 × 10/100	8 × T1 or E1
CN 3220	2 × 10/100	1 × DS3 or E3
CN 3222	2 × 10/100/1000	2 × DS3 or E3

SONET/SDH
Model	Subscriber	Network
CN 3152	2 × 10/100 2 x GbE (SFP)	2 × OC-3/STM-1

THE CN 3000 SERIES ETHERNET-OVER-TDM NTE FEATURES CARRIER-GRADE DESIGNS, including robust Quality of Service (QoS) support, and MEF 9 and MEF 14 certification. The products are highly flexible with programmable hardware that supports remote, in-service upgrades.

Implementation of standards-based X.86 and Generic Framing Procedure (GFP) encapsulation ensures vendor interoperability and the ability to adapt as specifications change and evolve. Where applicable, Virtual Concatenation (VCAT) and Link Capacity Adjustment Scheme (LCAS) are supported to bond TDM circuits and provide services at rates not directly available over standard TDM circuits, allowing greater service granularity and more efficient network utilization.

Options for switch fabric and line redundancy ensure best-in-class service reliability, while support by Ciena’s ON-Center provides an integrated network management solution that delivers end-to-end provisioning, configuration, performance and health monitoring capabilities across all network platforms.

Ciena may make changes from time to time to the products or specifications contained herein without notice.