CN2149069Y - Shared wire telephone automatic adapter - Google Patents

Abstract

The utility model relates to an adaptor of a two-line party-line telephone. The utility model is additionally provided with a circuit of an automatic time delay signal generator and a sound self-locking circuit on the basis of a communication and interlocking circuit and a calling and sounding circuit of the existing party-line telephone converter with four-line connection. Due to the arrangement of the new circuit, a calling signal is transferred on an outside line of the original telephone, a calling signal transfer line does not need to be added, and the calling and sounding circuit of the party-line extension telephone receives a signal from the outside line and sounds. The utility model realizes the communication and the interlocking between the party-line extension telephone with two-line transfer, and the mutual calling and switching of the outside line calling, and increases the functions of automatic time delay calling, automatic telephone channel hanging up, self locking of the sound of the local telephone of the caller, etc.

Description

Shared wire telephone automatic adapter

The utility model belongs to jack per line extension adapter.

The multi-functional automatic switcher of the utility model patent that the applicant has applied for (91205764.5) party-line (hereinafter to be referred as collinear adapter) needs to connect quadded cable between collinear extension set.And the used collinear extension set of most of users all to be two line parallels use, need new frame four lines or set up two electric wires when former adapter is installed.The user installs difficulty voluntarily, the engineering cost height.

The purpose of this utility model provides a kind of party-line adapter (hereinafter to be referred as the two wires adapter) of two line parallels, the user does not need to increase on line, as long as be connected between outside line and the extension set with novel two wires adapter, just can realize calling out switching between the collinear extension set mutually, conversation is not disturbed mutually.

The purpose of this utility model is achieved in that this two wires adapter (see figure 1) has one and calls out acoustics circuit, an automatic time delay signal generating circuit and a conversation interlock circuit, has two outside line inputs and goes into terminal X ₁, X ₂With two telephone connection terminal X ₃, X ₄, call out acoustics circuit and outside line input terminal X ₁, X ₂And connect; The power input of automatic time delay signal generating circuit is connected with a phone terminal with an outside line input terminal; Its output and phone terminal X ₃, X ₄And connect; The conversation interlock circuit is serially connected between another exterior lines terminal and another phone terminal.The automatic time delay signal generator circuit, it produces one second one call signal intermittently, by one-way SCR V ₁The call signal that is different from other telephone signal is outputed to exterior lines terminal X ₁, X ₂On, be transferred to other extension set through the two wires telephone line.Each call extension acoustics circuit sends the calling sound equipment.In addition, be connected between telephone set and the outside line with the one-way SCR interlock circuit, by the outside line voltage control, an off-hook conversation arranged in extension set in parallel, line voltage distribution is a low pressure, and other extension set cuts out.Thereby realized the interlocking of conversing between the collinear extension set that the two wires connects, the outside line incoming call calls out the function of switching mutually.

Because the employing of foregoing circuit, realized the two wires transmission between the party-line adapter, replaced four line transmission commutators and other three to four line adapter of former Patent project fully, installed simple, if user's parallel operation uses, just on line need be do not changed,, just the interlocking of conversing between the extension set can be realized as long as replace the original call terminal box with the two wires adapter, switching is called out in the outside line incoming call mutually, and increased the automatic time delay calling, hang up speech channel automatically, functions such as this machine of calling party sound equipment self-locking.This two wires adapter can also be installed in the telephone set of making built-in adapter in the telephone set, and user installation is used more convenient.

Fig. 1 is the circuit block diagram of this adapter.Fig. 2 is the circuit theory diagrams of this adapter.

One, the utility model adapter is made up of four parts, first's conversation interlock circuit, and second portion automatic time delay signal generator circuit, third part is called out acoustics circuit, the 4th part sound equipment latching circuit.

With reference to Fig. 2

The conversation interlock circuit is by one-way SCR V ₁, unidirectional breakdown diode D ₃And capacitor C ₁, resistance R ₁, R ₂Form delay capacitor C ₁Be attempted by between the SCR control utmost point and the negative electrode, the conversation interlock circuit is connected on phone H ₁And between the outside line.The telephone signal path is: exterior lines terminal X ₁→ phone terminal X ₃→ phone terminal X ₄→ through controllable silicon V ₁→ exterior lines terminal X ₂The outside line high pressure is added on a point, because of C through phone when this extension set off-hook ₁Two ends are at the zero-time no-voltage, controllable silicon V ₁Control very electronegative potential, V ₁Not conducting.The a point voltage is through divider resistance R ₁, R ₂Give C ₁C after a second charges ₁Both end voltage is raised to V ₁Conducting voltage triggers V ₁Conducting, telephone signal is connected.As other extension set such as H ₂Elder generation's off-hook, outside line voltage is low-voltage, R ₁, R ₂Can not trigger V after the dividing potential drop ₁If conducting is H ₂Sending the dial impulse time during dialing can be greater than one second, C ₁Charging voltage does not reach V ₁So conducting voltage is this extension set H ₁Off-hook is noiseless, does not influence H ₂Dialing.Otherwise H ₁The off-hook H of elder generation ₂Noiseless, realized interlocking between the extension set.When outside line incoming call ring, ringing-current is by phone H ₁, be added in unidirectional breakdown diode D ₃Two ends, forward voltage is higher than diode breakdown voltage, and ringing-current passes through, the ring simultaneously of parallel operation phone.

The ringing-current path is: terminal X ₁→ X ₃→ phone H ₁→ terminal X ₄→ breakdown diode D ₃→ terminal X ₂→ local telephone network loop → terminal X ₁

The automatic time delay signal generating circuit is by breakdown diode D ₄, transistor BG ₃, BG ₂, resistance R ₇, R ₈, R ₉, R ₁₀, R ₁₁, NAND gate YF ₄, diode D ₁, capacitor C ₅, switch S ₁Form the trigger-type delay switch circuit, transistor BG ₃Emitter and collector and switch S ₁Parallel connection, switch S ₁Through R ₇, R ₈Meet NAND gate YF ₄Input, YF ₄Output through diode D ₁With transistor BG ₂, BG ₃The electronic switch that reaches the corresponding resistor composition joins, at NAND gate YF ₄Input and binding post X ₄Between and connect a capacitor C ₅, it and resistance R ₇, R ₈Form a delay circuit.NAND gate YF _1,2,3With corresponding resistance capacitance, transistor BG ₁, light-emitting diode D ₅Form time delayed signal generation circuit.As phone H ₁When calling out other extension set with switch S ₁After the closure, phone H ₁On-hook, outside line voltage are high pressure, and the trigger switch circuit working provides the NAND gate operating voltage, capacitor C ₄Pass through R ₇Begin charging, b point or electronegative potential, NAND gate YF ₁The output high potential is by NAND gate YF ₂The intermittent oscillation circuit work of forming in one second one, control is by NAND gate YF ₃The signal oscillation circuit intermittent oscillation of forming is passed through R ₄Drive BG ₁, D ₅The output circuit of forming is by controllable silicon V ₁At X ₁, X ₂Two ends produce secondary call signal, simultaneously D ₅Luminous expression is called out, as extension set H ₂The off-hook conversation, outer circuit is a low-voltage, and switching circuit cuts off automatically, and oscillator signal stops.As extension set H ₂Unmanned, 40 seconds left and right sides C ₄Be charged to reversal voltage, YF ₁Counter-rotating output electronegative potential, YF ₂Output HIGH voltage, YF ₃Keep vibration to produce a long and ring signal, 5 seconds left and right sides C ₅Be charged to reversal voltage, YF ₄Counter-rotating output electronegative potential makes BG ₃, BG ₂End, operating voltage is zero, and oscillator signal stops.BG when signal generating circuit is worked ₁All the time conducting keeps speech channel not interrupt BG when signal stops ₁End D ₅Lamp goes out, and speech channel is hung up automatically.

Calling out acoustics circuit comprises by resistance R ₁₂, capacitor C ₇Form high pass filter, by transistor BG ₄, resistance R ₁₃, capacitor C ₆, diode D ₂Amplifier and a sound generator HA of forming.The input of high pass filter and outside line also connect, and output is connected with amplifier input terminal, and sound generator HA is serially connected in the output loop of amplifier.From X ₁, X ₂Two ends are by phone H ₂The adapter call signal of coming by outside line transmission by high pass filter, target signal filters such as other telephone signal such as hum, dial impulse, outside line ringing-current amplify rear drive sound generator HA bid sound equipment through amplifier.

The sound equipment latching circuit is managed BG by crystalline substance ₅And resistance R ₁₄Form BG ₅Emitter and collector with call out BG in the acoustics circuit ₄Base stage and emitter also connect.Resistance R ₁₄Be connected transistor BG ₅The BG of base stage and automatic time delay signal generating circuit ₂Between the base stage.BG when calling out as this machine ₂Base voltage passes through R ₁₄Be added in BG ₅BG on the base stage ₅Conducting, this machine of shutdown call acoustics circuit is jingle bell not, D ₅The bright expression of lamp is called out, and lamp goes out and represents the other side's off-hook conversation, or delay switch is hung up speech channel automatically.

Two, the utility model two wires call forwarding device course of work is as follows:

As party-line circuit extension set H ₁During the outside number dialing telephone call of off-hook, controllable silicon V ₁Conducting, low-voltage between outside line A, B, serial connection controllable silicon ends in other extension set, and phone is noiseless.Otherwise extension set H ₂Off-hook H ₁End, guarantee H ₁, H ₂Or H ₃, H ₄Deng an extension set side and outside line conversation only.

When the outside line incoming call, the ring simultaneously of all extension sets, extension set H ₁When off-hook was replied, other extension set was noiseless.If outside line is to look for other extension set, need press S ₁On-hook behind the switch, this machine lamp is bright, and other extension set sends sound equipment simultaneously.Open S ₁Switch, automatic time delay signal generator circuit maintenance work is as H ₂The extension set off-hook is replied, and sound equipment stops this machine lamp and goes out.As H ₂Extension set is after nobody connects 40 seconds, and this machine is removed line automatically.

Claims (3)

1, a kind of two wires party-line adapter has one and calls out acoustics circuit, an automatic time delay signal generating circuit, a sound equipment latching circuit and a conversation interlock circuit, it is characterized in that: have two outside line input terminal X ₁, X ₂With two telephone connection terminal X ₃, X ₄, call out acoustics circuit and outside line input terminal X ₁, X ₂And connect; The power input of automatic time delay signal generating circuit is connected with a phone terminal with an outside line input terminal; Its output and phone terminal X ₃, X ₄And connect; The conversation interlock circuit is serially connected between another exterior lines terminal and another phone terminal.

2, according to claim 1, described two wires party-line adapter, it is characterized in that: a delay capacitor C in parallel between the SCR control utmost point and the negative electrode in the conversation interlock circuit ₁

3, according to claim 1, described two wires party-line adapter, it is characterized in that: the transistor BG in the sound equipment latching circuit ₅Emitter and collector with call out BG in the acoustics circuit ₄Base stage and emitter also connect.Resistance R ₁₄Be connected transistor BG ₅The BG of base stage and automatic time delay signal generating circuit ₂Between the base stage.