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A circuit for reducing ring current source power consumption

A source power and circuit technology, applied in the field of analog subscriber line interface boards, can solve the problems of power consumption and high power loss, etc.

Active Publication Date: 2009-01-21
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the current subscriber line is not ringing and the ringing current relay K is in the off state, the ringing current signal will still generate leakage current through the ringing off-hook detection circuit 2, consuming power
If multiple ringing off-hook detection circuits 2 are hung on the same ringing current bus, the power consumed on the ringing current source 3 will be very large

Method used

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  • A circuit for reducing ring current source power consumption
  • A circuit for reducing ring current source power consumption
  • A circuit for reducing ring current source power consumption

Examples

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Embodiment Construction

[0025] Such as image 3 As shown, a circuit for reducing the power consumption of the ringing current source in the present invention includes a subscriber line interface circuit 1, a ringing and off-hook detection circuit connected to the subscriber line interface circuit 1, and a ringing current relay K.

[0026] The ringing off-hook detection circuit includes first and second detection resistors RS1, RS2 and the second feed resistance RT' connected between the first and second detection resistors RS1 and RS2;

[0027] One end of the second feeding resistor RT' is grounded, and the other end is connected to the TIP end of the subscriber line interface circuit 1 through the ringing relay K and the current limiting resistor R;

[0028] The RING end of the subscriber line interface circuit 1 is also directly connected to the ringing current source 3 through another current limiting resistor R, the ringing current relay K and the first feeding resistor RR'.

[0029] In this inv...

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PUM

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Abstract

A circuit for reducing ring current source power consumption, which contains user line interface circuit, ringing off detecting circuit and ringing current relay wherein the ringing off detecting circuit containing first and second detection resistor, second feeding resistor cross connected between first and second resistor, one end of the second feeding resistor is grounding and another end is connected to TIP end of user line interface circuit by ringing current relay and current limiting resistor, the RING end of user interface circuit is directly connected to ringing current source by another current limiting resistor, ringing current relay and first feeding resistor, when the ringing current relay is in off state, the current in ringing detecting circuit is zero, no leakage power consumption produces, so to obtain reducing ringing current source power consumption.

Description

technical field [0001] The invention relates to an analog subscriber line interface board of a program-controlled exchange, in particular to a circuit for reducing the power consumption of a ringing current source externally connected to the analog subscriber line interface board. Background technique [0002] The analog subscriber line interface board of the existing program-controlled exchange includes a subscriber line interface circuit (SLIC) and a ringing off-hook detection circuit. Usually, in the design of the analog subscriber line interface board, in order to simplify the design and reduce the cost of the peripheral ringing current source connected to the analog subscriber line interface board, multiple SLICs are usually used to share the same ringing current source. Such as figure 1 As shown, several subscriber line interface circuits 1 are respectively connected to a ring current relay K, and then the subscriber lines at the RING end (ring end) and the TIP end (t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04M19/02
Inventor 刘蕾陈俊顾伟俊陈颖
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD