Hello,
ME60: Multi-service control gateway product (that is BRAS), mainly used in broadcasting, television, education and other industries, providing a unified user access and management platform.
BARS belongs to WDM technology, It's still a routing device.
BRAS seems to be the management technology of the operator PPPOE.
NE40E: High-end routers are used in enterprise wide area network, core nodes, large enterprise access nodes, campus interconnection and aggregation nodes, and various large IDC network outlets.
Thanks