| 摘要 |
A power supply system, more particularly for telephone lines, comprises a load or remote unit coupled to the power supply or exchange unit by a line, for example a telephone line T2, T3, the resistance of which is significant in relation to the resistance of the load. Monitoring means are provided in the vicinity of the power supply and in the vicinity of the load for monitoring the voltage and/or current in the line circuit. Telemetry means is provided for transmitting output signals from the monitoring means in the vicinity of the load to receiving means in the vicinity of the power supply. Means EU control associated with the power supply is arranged to receive signals from the respective monitoring means and to control the power delivered by the power supply. |
