The Cisco Catalyst WS-C4500 Series switches are designed for aggregation of business services and subscriber access in Metropolitan area networks that offer optical Ethernet. The Catalyst WS-C4500 Series allows network operators to extend control and intelligence to large and small sites at the MAN edge in their EFM networks. Frontier offers used and refurbished Catalyst WS-C4500 Series Switches. Contact us today or simply request a quote. 866-226-6344