Cisco 7600 Series 12-Port Channelized T3 (CT3) to DS0 Optical Services Modules (OSMs) for channelized services enable the rapid, efficient addition of circuits within existing electrical connections. When a channelized circuit is established, all channels from DS3 to DS0 can be remotely provisioned, eliminating the need for the multiplexer line-card installations that are normally required to increase the available number of electrical circuits.Coupled with numerous interfaces and native edge-aggregation services such as Multiprotocol Label Switching (MPLS) and Quality-of-Service (QoS), the Cisco 7600 Series 12-Port CT3 to DS0 OSM meets aggregation site connectivity requirements. Using channelized interfaces to receive multiplexed T1/E1 circuits on a single pair of optical fibers, service providers and large enterprises can save dramatically on power, floor space, local-loop charges, and equipment costs.The Cisco 7600 Series 12-Port CT3 to DS0 OSM can accept both clear-channel T3 traffic and multiplexed circuits from T1/E1 and DS0. Service features include support for IP and MPLS traffic, Class-Based Weighted Fair Queuing (CBWFQ), Low-Latency Queuing (LLQ), and Weighted Random Early Detection (WRED). Also included is support for hardware-enabled Multilink Point-to-Point Protocol (MLPPP), capable of up to 168 T1/E1 bundles supporting up to 12 T1/E1 links per bundle. With this combination of features and performance, Cisco provides a versatile electrical interface for the easy upgrade to the advanced network architectures provided by Cisco 7600 Series routers.Service provider points of presence (POPs) and enterprise headend locations can use the Cisco 7600 Series 12-Port CT3 to DS0 OSM to enable rapid, efficient addition of circuits where density and performance are required. In topologies where wideband optical tributaries are not an option, the Cisco 7600 Series 12-Port CT3 to DS0 OSM is ideal for consolidation of circuits from multiple transport systems and facilitates rapid circuit cutover without having to rearrange tributaries within existing multiplexers.