Cisco Solution

http://www.cisco.com/en/US/solutions/ns340/ns414/ns742/ns741/networking_solutions_products_genericcontent0900aecd80601e22.html

http://www.cisco.com/en/US/docs/solutions/Enterprise/WAN_and_MAN/Ethernet_Access_for_NG_MAN_WAN_V3.1_external.html