The EtherEdge 4000 series is a modular system that enables cost-effective delivery of Ethernet services over copper, fiber and wireless backhaul facilities.  The series has several possible deployment scenarios.  It can be located in the basement of multi-tenant buildings, serving as an edge device that supports 24 subscriber side terminations with a mix of interface types: 10/100, 100FX, GigE, DS3/E3, CHDS3 (DS1s'/E1s') and OC3STM1 which can be mapped to DS3, OC3/STM1, OC12/STM4 and GigE trunk side ports for cost-effective Ethernet aggregation.  The EtherEdge 4000 can also be located at the Service Provider's POP or CO in order to aggregate traffic from up to 24 remote EtherEdge 4000, EtherReach 2000 or EtherReach 1000 devices.