With the ATM OC-3 network modules, the Cisco 3600 series expands its flexibility as a multifunctional branch office solution for service provider and enterprise customers. The modules add to the broad portfolio of Cisco ATM Customer Provided Equipment (CPE) and central office products that allow branch offices to take advantage of the higher bandwidth and quality of service (QoS) available with ATM services. High-speed ATM access on the Cisco 3600 provides cost-effective, value-added, high-speed managed router services to both enterprise and service provider customers.The OC-3 ATM network modules developed for the Cisco 3600 modular access routers provide a single-port SONET and SDH-based OC-3c/STM-1 interface for worldwide use. The modules are designed to support the convergence of data, voice, and video services that allow customers to migrate existing voice and video traffic onto a corporate data network for substantial cost savings.