CN86206198U - Loop centralizer of telephone subscriber - Google Patents

Abstract

Disclosed is a loop centralizer of telephone subscriber for finishing pair gain, comprising a subscriber automatic line selecting system and a line selecting controller, wherein, the automatic line selecting system and the line selecting controller are connected with the subscriber line circuit, avoiding the lightning and high-frequency interference, and the connection and the rehabilitation of the automatic line selecting system are rapid and accurate. The automatic route selecting system is composed of a general telephone crossbar connector and a line idle queuing busy circuit. The line selecting controller comprises a subscriber state monitoring apparatus, an anti-transmitted receiver, an apparatus for processing signals, a control instruction apparatus and a signal source (low frequency signal / voltage source).

Description

Loop centralizer of telephone subscriber

The utility model relates to the machine that is used for local user's loop pair gain, promptly in the place that local user concentrates relatively, can guarantee under the constant prerequisite of percent of call completed after adopting this concentrator, with seldom telephone wire to opening many telephones.It is reliable that local user's loop concentrator of the present invention has running, and circuit is simple and continue and restore advantage rapidly and accurately.

In local telephone communication, track investment generally accounts for 40～60% of gross investment.Because track investment is big and consume a large amount of non-ferrous metals, so in order to compress track investment, present countries in the world are all studied pair gain as important topic (can be referring to Li Zhengfu work " developing local loop technology ", " telecommunication technology ", № 11, the 43-45 page or leaf, People's Telecon Publishing House, Beijing (1982)).

The pair gain technology is divided into two big classes: the one, and the subscriber loop carrier system is as the SLC-8 series and the SLC-40 series of the U.S..But owing to be subjected to the interference of electromagnetic field of high frequency, this carrier system all can't be used in TV station and the high intermediate frequency interference source scope in the broadcasting station; In same cable, disturb also very serious between line simultaneously; And strict to line impedance, distance is long or too short all not handy.The 2nd, the local loop switching system, also be the local loop concentrator, the LSS system of the U.S. for example, the B281 type customer switching system of U.S. woods thatch (Lynch) communication equipment company (B281 Electronic Subscriber Switching System).For this class concentrator, generally adopt microcomputer in the world as controller.But constitute by reed relay in the local loop concentrator of select switch in this class; because electronic device directly links to each other with local user's circuit; and reed relay is withstand voltage not high; contact allows by electric current little; though installed special protection facility in the use additional, it is bad that the inductive kick of thunder and lightning in communication line still can cause components and parts.This is the maximum disadvantage of this kind equipment.Simultaneously, continue, recovery time is longer, for example the B281 concentrator recovery time that continues is respectively 250ms and 2000ms, and such equipment cost height.

In view of the foregoing, develop anti-High-frequency Interference, anti-thunder and lightning fills and hits, and is strong to circuit adaptability, continue and recovery time short, local user's loop concentrator (increase-volume equipment) that cost is low is in the world communication expert and the problem very paid close attention to of user at present.

The utility model has just and is not subjected to any High-frequency Interference, the anti lightning inductive kick, restore and connecting time shorter, suitable switch allows the interior various distances of loop resistance, the separate unit expense of increasing capacity only is half local user's loop concentrator of system controlled by computer loop switching system cost.

Local user's loop concentrator of the present utility model mainly is made up of user's automatic selector and route selection controller two large divisions, does not wherein adopt the above signal of intermediate frequency, so not disturbed by medium-high frequency.Select switch is exactly the phone crossbar switch of using always, and the route selection controller is to add the combination of various low frequency signals and power supply signal and control with telephone relay commonly used.Because empirical evidence for many years, crossbar switch and telephone relay need only the trouble that general protective device just can exempt from the impact of circuit lightning induction, so can not broken by the line influence high pressure.Continue and when restoring the suction of main relay put sum and all be not more than for seven steps, so restore and connecting time all shorter.Because the efficient height is not so the user has any sensation when using.

The user's automatic selector that adopts in the utility model has any one user is connected to function on any trunk line.The select switch of route selection controller control user side and local side is to be connected to the trunk line of the active user of user side (local side) by any free time on the corresponding active user of local side (user side).In recuperation, make the corresponding recovery of select switch working portion during the active user on-hook and make trunk line recover idle condition.

Select switch is general phone crossbar switch, and its operation principle can be with reference to the interrelated data of local telephone network crossbar switch operation principle introduction.

Come to introduce in detail the route selection controller in the utility model with reference to the accompanying drawings and comprise the route selection controller, the operation principle of the local telephone network loop concentrator of components and parts such as select switch.In the accompanying drawing:

Fig. 1 is the schematic diagram of a kind of embodiment of local user's loop concentrator of the present utility model system.

The select switch schematic diagram of Fig. 2 for being made of the phone crossbar switch in the utility model, its operation principle sees also schematic diagram 7, Figure 13.

Fig. 3 is the operation principle schematic diagram of the route selection controller in the utility model.

Fig. 4～Figure 15 is an electrical schematic diagram of the present utility model.

Fig. 4 is family end subscriber Stateful Inspection figure.

Fig. 5 and Fig. 6 are family end control chart.

Fig. 7 is family end automatic route selection figure.

Fig. 8 and Fig. 9 are signal transmitting and receiving and handle figure.

Figure 10 is a local side User Status watch circle.

Figure 11 and Figure 12 are the local side control chart.

Figure 13 is local side automatic route selection figure.

Figure 14 is busy tone generator figure.

Figure 15 is power-supply system figure.

At first the route selection controller figure that provides referring to Fig. 3 comprises User Status monitoring arrangement 7 among the figure, referring to Fig. 4, and Figure 10; Antitransmitter receiver 8, referring to Fig. 8, Fig. 9; Signal source 9, referring to Fig. 8, Figure 15, (9 form by low frequency signal source 10 and/or voltage source 11); Signal processor 12, referring to Fig. 8, Fig. 9; And control command device 13, referring to Fig. 5, Fig. 6, Figure 11, Figure 12.

7 are made up of telephone relay and electronic original part, and its effect is the monitoring user state.Start 8,9 work and provide corresponding signal for 13 by 7; The 8th, the transmit-receive switch of telephone relay; 9 are referred to as signal source, form by 10 and/or 11; The 10th, the various low frequency generators or the AC power that constitute by electron-amplifier spare; The 11st, DC power supply; The 12nd, the control signal receiving processor, this processor is made up of electron-amplifier spare or DC potential recognition means and telephone relay; This processor gives 13 after the control signal of receiving is handled identification in the work; The 13rd, constitute by telephone relay contact heap, this device becomes various control commands to command select switch accurately to work the 7 and 12 various conversion of signals of sending here.

The route selection controller is in accepting state at ordinary times, and when the user started concentrator, 7 worked at once, sends out thereby 7 controls 8 are transferred to by receipts, and the part signal 10 and/or 11 is sent to outside line by 8 and is sent to the other side.7 also send signal simultaneously gives 13, becomes the work of command adapted thereto with the control select switch by 13.Select switch after hours.7 states change immediately and control 8 and 9 and restore.

When signal processor 12 is received the other side's control signal, fix tentatively on accepting state with 8 immediately.12 distinguish control signals and provide corresponding information for 13, send command adapted thereto by 13 and finish relevant work with the control select switch.Subsequently, controller restores at once.The signal that this control procedure is delivered on the circuit according to customer requirements can only be used electric potential signal, low frequency signal, also can electric potential signal and low frequency signal shared.Listed relay is universal telephone relay in specification and claims.

Fig. 2 shows the select switch of understanding with the logotype of above-mentioned route selection controller.This select switch is common phone crossbar switch, and this is one of characteristics of the present utility model.Up to the present, in the relevant document in present technique field, also there is not the relevant record of using the phone crossbar switch as select switch in local user's loop concentrator; Even concerning this professional expert, this also is beat all.

The operation principle of local user's loop concentrator of the present utility model is described with reference to Fig. 1 below.In the embodiment of Fig. 1, local user's loop concentrator of the present utility model comprises substation 1, route selection controller 2,5, select switch 3,4 and mechanical main frame 6.The route selection controller 2,5 in this embodiment and the structure and the operating process of select switch 3,4 were introduced in the above.

When family terminal user does caller, 1 off-hook, 2 make 3 action part circuit, and 1 can send to central office terminal with control signal.5 receive signal after, control 4 actions also start the intra-office respective user.Behind the intra-office complete connection, route selection controller 5 is again to 2 loopback control signals; 3 finish whole actions after, 5,2 all restore.1 can choose trunk line by 3, and 4,6 are connected to the switch respective user again, and caller at this moment hears that dialing tone finishes caller and continue.

When the family terminal is done when called, 5 monitor the intra-office signal after, control 4 immediately and finish route selection and control signal is sent to the family terminal.2 receive that signal confirms that back control 3 finishes corresponding actions, and the route selection controller 2,5 at two ends restores afterwards, at this moment continuous line among local side user by 6,4 are connected to called subscriber's 1,1 jingle bell, so far finish called connection, and 1 off-hook can be conversed.

During talk-through, no matter be that caller or called either party's on-hook all can make automation restore.After the end subscriber on-hook of family, route selection controller 5 monitors signal, is restored by 5 controls 4.4 restore after, 5 send signal to family end 2; 2 receive signal after, 3 restore immediately.If on-hook behind the end subscriber of family can be heard busy tone.

Referring again to Fig. 4～15, is the operation principle that example illustrates the each several part circuit with No. 1 user.

No. 1 user's caller off-hook, the ab duct is logical, YQ ₁Action is referring to Fig. 4.

YQ ₁The HA of action launching correspondence and H ₁Action is referring to Fig. 5, Fig. 6.

HA, H ₁Action makes transmit-receive switch transfer the control signal of sending out No. 1 user to by receipts and is sent to local side.After local side is received signal and recognition and verification, SA, S ₁Action is referring to Fig. 8.Low frequency signal source among Fig. 8 can be used 20Hz, 50Hz or other low frequency, and the easiest means are exactly general civil power, transfers to get final product in the safe voltage scope.

Local side SA, S ₁Link up No. 1 user ab of central office terminal line after the action immediately, to start automatic switch-board.Owing to there is electric current to pass through a line, Light Coupled Device work makes BG conducting YC ₁Action, YC ₁Action keeps by contact own, referring to Figure 10.

Local side SA, S ₁Action makes local side HA and H simultaneously ₁Action is referring to Figure 11,12.

Local side HA, H ₁After the action, take circuit start Z by the queuing of local side line idle ₁Action is referring to Figure 13.

Z ₁Action, JSZ ₁Action is referring to Figure 13.

JSZ ₁Action, Z ₁Keep, referring to Figure 13.

JSZ ₁JSb is cut off in action ₁Actuating circuit makes family end JSb on the corresponding line ₁Discharge, referring to Fig. 9.

Family end JSb ₁Discharge family end Z ₁Action is referring to Fig. 7.

Z ₁Holding circuit is referring to Fig. 7.

So far family end and local side are chosen article one circuit, and No. 1 user's ab line has been that 1 user's ab line is all linked up with the code name of automation, hear that switch sends dialing tone here, and dialling to dial the number gets final product.

Because family end Z ₁Action, YQ ₁Change the road and keep YM ₁Action is referring to Fig. 4.

Family end YM ₁HA and H have been cut off in action ₁Actuating circuit, HA and H ₁Discharge immediately, referring to Fig. 5, Fig. 6.

Because family end HA, H ₁Discharge, family end transmitting circuit recovers reset condition, has cut off SA, S ₁Signal circuit.Again because local side collection of letters circuit HA, H ₁Move, cut off collection of letters circuit, SA and S ₁Discharge and restore, referring to Fig. 8.

Because local side SA, S ₁Discharge, disconnect so line is linked up in No. 1 user's of local side startup, referring to Figure 10.Owing to the family end phone ab duct with machinery is logical, a line still has electric current to pass through, YC again ₁Still keep inhaling moving state.

Local side SA, S ₁Release and YZ ₁Moving local side HA, the H of all having cut off of suction ₁Actuating circuit, so HA, H ₁Discharge, referring to Figure 11, Figure 12.

No. 1 the user breathes out as caller, and the concentrator action all finishes.

When the caller off-hook, for a certain reason, continue when undesired, if surpass 3 seconds, the YS relay discharges, YM ₁Action, YQ ₁Discharge, send busy tone by the busy tone circuit to No. 1 user of caller, referring to Fig. 4.

No. 1 user does when called, and arbitrary user needs No. 1 user in the switch, after automation is finished incoming call and continued, sends ringing-current here on No. 1 user ab line, when ringing-current by being connected across the R on the ab line ₁C ₁The circuit start Light Coupled Device, Light Coupled Device work makes BG conducting, YC ₁Action, YC ₁After the action, by R ₂C ₂Act on for the first time and for the second time the interim of ringing-current still keep the YC action, referring to Figure 10.YC ₁Action launching local side HA, H ₁Action is referring to Figure 11, Figure 12.

Because local side HA and H ₁Action, transmit-receive switch circuit local side are become by receipts to be sent out, and the family end delivered in 1 code name, and the family end is received SA behind the signal, S ₁Action.The same with aforementioned family end toward local side transmission signal, referring to Fig. 8, SA, S ₁Action diagram slightly.Since family end SA, S ₁Action starts family terminal HA, H ₁Action is referring to Fig. 5, Fig. 6.

Local side HA, H ₁Action as if first pair of circuit spare time, then takies circuit start local side Z by the line idle queuing ₁Action is referring to Figure 13.

Z ₁Action, JSZ ₁Action, JSZ ₁After the action, Z ₁When keeping its circuit to do caller the same (figure is omitted), referring to Figure 13 with No. 1 user.

Because JSZ ₁JSb is cut off in action ₁Actuating circuit, end JSb in family on the corresponding line ₁Discharge, when the release circuit is done caller with No. 1 user the same (figure is omitted), referring to Fig. 9.

Because JSb ₁Discharge family end HA, H ₁Move family terminal Z ₁Action also keeps, when circuit is done caller with No. 1 user the same (figure is omitted), referring to Fig. 7.

Because family end Z ₁Action makes YQ by corresponding c line ₁YM ₁Action, YQ ₁, YM ₁When the moving circuit of string is done caller with No. 1 user the same (figure is omitted), referring to Fig. 4.At this moment No. 1 ab line of called subscriber is logical by respective user ab duct in central office terminal and family terminal and the switch, called No. 1 user's bell ring, and off-hook can be conversed.

Because local side is at Z ₁After the action, YZ ₁Slow motion, YZ ₁Action make local side HA, H ₁Discharge, referring to Figure 11, Figure 12.

Since local side HA, H ₁Discharge, make local side transmit-receive switch circuit, stop to send 1 signal by sending out the state that returns to original receipts.The family end can not receive signal, adds the action of family end HA, thus family end SA, S ₁Discharge.HA, H are equally also blocked in the action of YM ₁Actuating circuit, so family end HA, H ₁Discharge, referring to Fig. 5, Fig. 6, Fig. 8.

So far No. 1 user is as called, and family terminal and central office terminal's work finish.

When family end subscriber talk-through on-hook, perhaps No. 1 user of other customer call nobody when replying on-hook, lost electric current on No. 1 ab of the user central office terminal line, BG ends.Surpass R ₂C ₂After the time that allows, YC ₁Discharge, referring to Figure 10.

Because local side Z has been blocked in the release of YC ₁Holding circuit, Z ₁Discharge JSZ ₁Also discharge simultaneously; Referring to Figure 13.

Because JSZ ₁And Z ₁Release, a line current is interrupted, JSa ₁Discharge, at this moment JSb ₁Action is referring to Fig. 9.

Because JSb ₁Inhale the moving family terminal Z that blocked ₁Holding circuit, family end Z ₁Discharge, circuit all restores, referring to Fig. 7.

Figure 14 is the busy tone generator circuit, and it is made up of two multivibrators, and the two frequency difference, B frequency are near 450Hz, and the frequency of A is very low, the signal output of the signal period property prevention B of A.Therefore, the signal of logical back dual-stage amplifier is a busy-back signal.

Figure 15 is a power supply diagram.First group is output as all relay power supplies, and second group is busy-back signal and transistor biasing power supply.The 3rd group for exchanging, as the low frequency signal source of carrying control number.

The distance that local user's loop concentrator of the present utility model is suitable for is by the desired loop resistance decision of switch; And increase-volume rate and increase-volume coefficient (ratio by m and n reflects) can be according to the decisions of customer requirements and telephone traffic spirit words, the series of products that this becomes the utility model to be of wide application; And intact for guaranteeing trunk line work, also have the Stateful Inspection function of trunk line.

Be not difficult to find out; above described only be a kind of embodiment of the utility model general plotting; for those skilled in the art; do not exceeding general plotting of the present utility model; under the protection range of claims and the aforesaid prerequisite, just can make various improvement and with such series of products remodeling.

Claims (3)

1, in order to finish local user's loop concentrator of pair gain, it is characterized in that, comprise user's automatic route selection system in this local user's loop concentrator, route selection controller and subscriber's line, wherein, the automatic route selection system is connected with subscriber's line with the route selection controller can exempt from thunder and lightning and High-frequency Interference, and route selection controller control automatic route selection system works is accurate rapidly.

2, local user's loop concentrator according to claim 1 is characterized in that, said user's automatic route selection system takies circuit by phone crossbar switch and line idle queuing and constitutes.

3, local user's loop concentrator according to claim 1 is characterized in that, comprises the User Status monitoring arrangement in the said route selection controller, antitransmitter receiver, signal processing apparatus, control command device, signal source, signal source can be low frequency signal source and/or voltage source.

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