Device for remote power feeding a terminal in a telecommunication network, and a concentrator and a repreater including the device
First Claim
1. A remote power feed device for supplying a remote power feed to a terminal in a telecommunication network, said device including:
- a measuring device for determining at least if the remote power feed current is greater than a first threshold current,said remote power feed current being able to assume a value very much greater than said first threshold current,said measuring device including a resistive circuit through which said remote power feed current flows and which has a resistance that varies as a function of the current flowing through it, andsaid resistance being lower if said current is very much greater than said first threshold current; and
means for comparing the voltage across said resistive circuit with a first threshold voltage.
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Accused Products
Abstract
A first resistor is connected in parallel with a second resistor having a lower resistance than the first resistor. The voltage at the terminal of the first resistor is compared with a first threshold voltage, and the voltage at the terminals of the second resistor is compared with a second threshold voltage. A switching device either connects the first resistor in series in a remote power feed circuit, if the switching device detects that the remote power feed current is less than a third threshold current that is between the first and second threshold currents, or connects the second resistor and the first resistor, connected in parallel, in series in the remote power feed circuit if the switching device detects that the remote power feed current is greater than the third threshold current.
88 Citations
6 Claims
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1. A remote power feed device for supplying a remote power feed to a terminal in a telecommunication network, said device including:
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a measuring device for determining at least if the remote power feed current is greater than a first threshold current, said remote power feed current being able to assume a value very much greater than said first threshold current, said measuring device including a resistive circuit through which said remote power feed current flows and which has a resistance that varies as a function of the current flowing through it, and said resistance being lower if said current is very much greater than said first threshold current; and means for comparing the voltage across said resistive circuit with a first threshold voltage. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification