Subscriber line power distribution system

A technology for power distribution systems and subscriber lines, which is used in telephone communications, electrical components, and current supply devices to achieve great flexibility and scalability.

Inactive Publication Date: 2013-07-03
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, using a solution with fixed scope groupings may also require additional market configuration and / or adaptation

Method used

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Examples

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Embodiment Construction

[0030] Figure 1 illustrates a stand with a power distribution system known from the prior art (for example, US 6,351,534) 100 . In this system, subscriber lines are grouped together depending on their loop length. For example, with the range ‘ A ’(For example, 0-300 meters) within the loop length subscriber line 114、115 Connect to the first line card 110 . Has scope’ B ’(For example, 300-1000 meters) within the loop length subscriber line 124、125 Connect to the second line card 120 . Finally, there is scope’ C ’(E.g.> 1000m) subscriber line within the loop length 134、135 Connect to the third line card 130 . Per line card 110、120、130 With compensation power 111、121、131 .

[0031] Each power supply 111、121、131 Monitor each range separately A, B, C And adapt each output voltage to a sufficient value in which all subscriber lines in that range can operate. Power supply unit 111、112、113 Public power source P Come feed.

[0032] Figure 2 illustrates the power distribution system acc...

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PUM

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Abstract

The present invention includes a system and a method for distributing power to telecommunication subscriber lines (231-236). It is important that the power dissipation in the subscriber line interface circuits, SLICs (221-226) is reduced. Power dissipation occurs when the subscriber lines (231-236) are fed with a voltage level that is higher than necessary. It is also important that the implementation allows for flexibility when configuring the subscriber lines (231-236). These problem have been solved by the current invention by using a power distribution system (210) comprising at least two power supply units (211,212,213) with different power supply voltages, a control unit (218) and a switching unit (219) connected between the SLICs (221- 226) and the power supply units (211,212,213). The control unit (218) is adapted to determine the loop voltages of the subscriber lines (231-236) and to connect the corresponding SLIC (221-226) to the power supply unit (211,212,213) giving the least power dissipation.

Description

technical field [0001] The present invention relates to systems and methods for distributing power to telecommunications subscriber lines. Background technique [0002] Plain Old Telephone Service (POTS) is also known as battery fed since its origins are based on remote feeding. The telephones at the subscriber's premises are powered by using the current flowing in the subscriber loop provided by the DC power supply in the central office. With remote power feeding, the phone also works in the event of a failure of the main circuit, a feature sometimes referred to as a "lifeline". [0003] The power required to feed the subscriber line depends on the loop length. Longer subscriber lines require higher voltage levels than shorter lines and can be as high as 60 volts DC. This level has been chosen to be high enough to pass several kilometers of subscriber lines but still very low for safety. [0004] At the Subscriber Line Interface Unit (Line Card), excess power that is no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M19/00
CPCH04M19/005Y02D30/70
Inventor M.莫利纳里
Owner TELEFON AB LM ERICSSON (PUBL)
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