equipment including passive optical network (name depends on the Service Provider).

Power

A typical power system for a switching office in an inside plant consists of the elements listed below:
*AC power system
**AC input switch gear
**Standby AC plant (where appropriate)
**AC distribution system (essential and non-essential loads)
**AC backup systems for uninterruptible loads and protected loads
*DC power system
**Rectifiers and plant controls

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