OAM (operation, Administration and Maintenance) functionality is important in public net - works for ease of network operation, for verifying network performance and to reduce network operating costs.

网络操作、管理与维护(oam)在公用网中非常重要，它能够提高网络可靠性，简化操作，降低网络运行成本。

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Use wired sensors monitoring network cabling composed of large quantity, installation and maintenance costs high, poor reliability, and in some parts of the complex building things cannot wiring.

使用有线传感器组成的监测网络布线量大、安装和维护费用高、可靠性差，并且在复杂楼宇物中的某些地方无法布线。

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Because the hardware, network and maintenance costs of these virtualized environments are distributed between multiple users, the overall cost is minimized for the end consumer.

因为这些虚拟环境的硬件、网络和维护成本会分摊到很多使用者身上，所以最终每个人的使用成本会降到最低。

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Dr Beeching said half the railway network was not carrying sufficient traffic to cover its maintenance costs.

BBC: Shadow falls on rural railways

Verizon has been replacing high-maintenance portions of its residential copper network with fiber optics to provide enhanced services and to reduce ongoing repair costs.

ENGADGET: Verizon adds 'record-high' 2.1 million subscribers in Q4 2012, but still makes a loss