Operation, administration and maintenance (OAM) sublayer do management in data link layer.

操作、管理和维护(oam)子层实现以太网数据链路层中的网络管理。

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Its strong Operation Administration and Maintenance (OAM) -similar to SDH and carrier-class security protection services-ensure efficient mobile backhaul business management and transmission quality.

同时其类似sdh的强大运行维护管理(oam)及电信级保护能力保障了移动回传业务的高效管理及传输质量。

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