| 摘要 |
A multi-handset cordless telephone system with power backup function causes that the power stored in the handsets can be reused as a power supply of the base unit in power outage state so that the power supply to the base unit is uninterrupted. Furthermore, the rechargeable backup cell added to the circuit further causes that the power is indeed uninterrupted even at the initial timing of the power outage. Moreover, broadcasting to the handsets wirelessly or through networks cause the users to keep attention to the power outage state as it occurs so as to adapt required operations for continuation of communication. However the present invention is suitable for usages of hospitals, hotels, and those having a large amount of handsets distributed in wide areas. These applications need to assure the un-interruption of communication. |
