The Cisco ASR 901 Series Aggregation Services Routers are compact cell-site and Ethernet access routers specifically designed to clock, aggregate, and backhaul mixed-generation RAN traffic. Cisco ASR 901 routers prioritize and process cell-site voice, data, and signaling traffic as part of the Cisco Unified RAN Backhaul solution for reliable transport across any available backhaul networks, including T1/E1, ATM, Carrier Ethernet, microwave, WiMAX, and service provider Wi-Fi networks. Designed for cell sites and Carrier Ethernet access, the Cisco ASR 901 differentiating features include: - Low power consumption - Line rate performance for all Layer 2 and Layer 3 interfaces - Flexible clocking options: TDM, Building Integrated Timing Supply (BITS), GPS (10Mhz, 1PPS/ToD),1588v2, and Synchronous Ethernet (SyncE) - Secure Mobile Transport: with IPSec and Network Address Port Translation (NAPT) - Extended operating temperatures - Small form factor: 1 rack unit (RU) with 8.3 - 9.1 in. depth - Redundant power and cooling - Pay-as-you-grow investment model