JPS5842986B2 - connector control circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the timing at which a connector is activated when a trunk is seized by an electric cable or the like at a central office relay stand.

Generally, in automatic private branch exchange equipment that has a central office line relay board, the trunks necessary to connect an external line such as a central office line to the operator and an extension line to the operator are stored in the relay stand, and the trunks necessary to connect the external line such as a central office line and the operator are stored in the relay stand, and the trunks necessary to connect the external line such as a central office line and the operator It has a function to arbitrarily capture the trunk by operations such as
When capturing a trunk, it is necessary to exchange information between the trunk and the relay stand, and to confirm the recovery of the trunk that is being captured first, so a circuit that sets a certain period of time until the trunk to be captured is activated is used. need.

FIG. 1 shows an example of a conventional trunk activation circuit, and FIG. 2 shows a trunk activation circuit according to an embodiment of the present invention.

In each drawing, BWT is a central office line bidirectional trunk that connects the central office line, extension line, and operator, ATT is a relay stand, and POS
is a seat device that is controlled from the relay console ATT and controls the connection between the relay console ATT and the office line bidirectional trunk BWT.

In addition, in the office line bidirectional trunk BWT, ON is a connector relay connecting between the office line bidirectional trunk BWT and the relay stand ATT, D is a diode for preventing current from looping around,
In the seat device PO8, SUP is an open operation in which the relay stand ATT is capturing the trunk, and a monitoring relay that monitors the capture of the trunk, and W and Z are the central office line bidirectional trunk BWT.
Timing relay to start the connector relay ON, R
O and C are resistors and capacitors for obtaining a slow recovery of the relay W, and TKo and TKl are the contacts of the trunk capture electric power TK in the relay stand ATT.

Further, in the drawings, symbols indicated by lowercase letters of the alphabet indicate the contacts of the relays indicated by the corresponding uppercase letters of the alphabet.

Although a plurality of central office line bidirectional trunk BWTs are normally installed, in Figures 1 and 2, they are referred to as BWT (AO), BW
T (/161)...It is shown as BWT (7g6n).

The operation of a conventional circuit will be explained with reference to FIG.

When the operator presses the electric wire TK corresponding to the central office line bidirectional trunk, for example, BWT (/160), on the operation panel of the relay stand ATT, if necessary, the ground air contact TK0 is pressed.
- Contact z0 - Relay W - Battery (1) A loop is formed and relay W operates, and when relay W operates, earth - Contact TK0 - Contact w0 - Relay Z - Battery A loop is formed, and relay Z operates.

When relay Z operates, the above (1) occurs due to the operation of contact z0.
After the starting loop of the relay W shown in is broken, the relay W continues to operate for a certain period of time while the charge stored in the capacitor C is discharged in the loop of resistor RO - capacitor C - contact w3 - relay W - low resistance O. It will recover after continuing.

At this time, relay Z continues its operation through its own contact z0.

When relay W is restored, earth - contact cn' - diode D - relay ON - contact T
A loop of K1-contact z1-contact w2-resistance R1-battery is formed to connect the central office line bidirectional trunk BWT (AO) to the central office line bidirectional trunk BWT (/l60) and the seat device P.
The connector relay for connection with O8 is activated, and the corresponding station line bidirectional trunk BWT (AO) and seat device PO2 are activated.
Close the connection between.

As a result, the office line bidirectional trunk BWT (AO) is drawn into the relay stand AT'l', and the relay ON is earth - contact cn0 - relay ON - contact cn1 - contact w1.
-Relay 5UP-Battery・・・・・・・・・・・・・・・
......The loop (2) is formed and continues its operation, and in the seat device PO8, the same loop (2) causes the trunk seize identification relay SUP to operate and connect the central office line bidirectional trunk BWT (AO). acquisition operation is completed.

After acquiring the central office line bidirectional trunk BWT (, %O), an appropriate call is made between the relay stand ATT and the central office line, and the relay stand AT
In T, for example, the central office line bidirectional trunk BWT (,460)
After connecting it to the extension, connect the power cord for de-locking (not shown in the figure).

), the loop in (2) above is released and the connection between the office line bidirectional trunk BWT (AO) and the relay stand ATT is released. For example, trunks of different types, such as a two-way trunk for a central office line and a trunk for calling an operator, may be used.
But it applies.

) For example, the central office line bidirectional trunk BWT (/160) and BW
If a call arrives at T(AI) at the same time or one after the other, there is no need to release the previously captured central office line bidirectional trunk BWT(AO) using the above-mentioned power line for releasing the capture, and the next call will be attempted to be captured. It is automatically released when the central office line bidirectional trunk BWT (A1) is captured (when the power station TK corresponding to the central office line bidirectional trunk BWT (/161) is operated).

That is, the central office line bidirectional trunk that is being acquired first, for example, 13WT.
(AO), new central office line bidirectional trunk BWT
When (AI) is captured, the operation holding loop (2) of the connector relay ON corresponding to the office line bidirectional trunk BWT (/160) is disconnected by the contact w1 due to the operation of the relay W, and the corresponding connector relay ON and the relay SUP are turned off. After restoration, a new operation maintenance loop (2) of the connector relay ON corresponding to the office line bidirectional trunk BWT (/l61) is formed, and the connector relay ON and relay SUP of the office line bidirectional trunk BWT (A61) are activated. ,Hold.

As explained above, in the past, if there is a trunk that has been operated on first and has not been released, a time guarantee is provided to confirm that the connector relay of the trunk that was operated on has been turned ON again. I was looking for W's slow recovery time.

For this reason, there is a drawback that the timing of starting the trunk is delayed by the time it takes for the relay W to recover when transitioning to a power operation for newly capturing the trunk.

The present invention is an attempt to improve these drawbacks, and a trunk activation circuit according to an embodiment of the present invention will be explained below with reference to FIG.

The difference between this embodiment of the present invention and the conventional example is that the start timing of the connector relay ON is connected to the start circuit of the relay Z, and the chain is formed by the contacts of the connector relays ON of the bidirectional trunks BWT (AO) to BWT (An) of each office line. If a circuit has been inserted, and therefore there is a previously captured two-way trunk, the new two-way trunk to be captured will be captured after the two-way trunk that is currently being captured is restored to the above light. Therefore, there is no need to rely on the slow-slow recovery characteristic of the relay W to guarantee the recovery of the connector relay ON.

The operation of the embodiment will be explained below.

When the operator presses electrician TK, earth - contact TK0 - contact z0 - relay W - battery...
...(3) A loop is formed and the relay W operates.

Here, if there is a trunk that has already completed the capture operation and is currently being captured, for example, the central office line bidirectional trunk BWT (/160), then the ground air - contact cn0 - relay ON - contact cn1 - contact w3
-Resistor R1 -Battery・・・・・・・・・・・・・・・・
By loop (4), the connector relay of the central office line bidirectional trunk BWT (AO) is turned on and the earth-contact cn2-relay 5UP-battery...
...The relay SUP is operating in the loop of (5), but
As a result of a new trunk acquisition operation, for example, the acquisition operation of the central office line bidirectional trunk BWT (AI), the relay W operates as described above, so that the contact w3 of the loop in (4) opens and the central office line bidirectional trunk BWT (AI) that is being acquired is activated as described above. When the connector relay of AO) is restored to ON, the relay SUP is restored by opening the loop contact cn'' of (5), and the station line bidirectional trunk BWT (AO) that is being captured first is Fully recover.

As shown in Fig. 2, the activation loop of relay Z of seat device PO8 is connected to each office line bidirectional trunk BWT (/160) to
The station line bidirectional trunk, which includes the chain circuit formed by the contact cn1 of the connector relay ON of BWT (A6n) and was captured earlier, for example, the earth-contact, is restored when the connector relay ON of BWT (AO) is restored. TK0 - contact w contact vertical 1 - relay) - contact c
n'(,an)--contact cn1(/l61)-contact c
n1 (AO) (chain circuit) - Contact 5up1 - Resistor R1 - Battery ・・・・・・・・・・・・・・・・・・
......The loop (6) is formed, and the secondary winding side ZGI) of the relay Z is excited and activated.

When relay Z is activated and operates, earth-contact cn0 (/160 ~ sanitary n)-diode D-
Relay ON-Electric TK'-Contact z2-Resistance R1-Battery・・・・・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・ The loop in (7) is formed, and the connector relay of the central office line bidirectional trunk to be newly captured, for example, BWT (AI), is turned ON. The branch line bidirectional trunk BWT (, %1) is pulled into the relay stand ATT.

In addition, the loop shown in (5) above is formed again for the central office line bidirectional trunk BWT (AI), and the seat device PO
At step 8, the relay SUP operates, and the operation of the connector relay ON is confirmed, and the connector relay ON is earth - contact cn0 - relay ON - contact cn' - contact z3.
- Contact sup' - Resistor R1 - Battery...
...The operation continues in the loop of (8).

Next, the starting loop (3) of the relay W described above is disconnected by the contact z0 since the relay Z operates, but the electric charge charged in the capacitor C is transferred from the resistor RO to the capacitor C to the contact w2 to the relay W to the resistor R.
O is discharged in the loop, and the discharge current causes the relay W to continue operating for a certain period of time and then recover.

This guarantees the activation of the relay SUP when the press of the electric switch TK is released immediately after the operation of the connector relay ON, and as a result, the relay Z is connected to the ground - contact 5up0 - contact w0 - contact z1 - relay Z. (
I) - It is maintained by the battery loop until the relay W is restored.

When the relay W recovers slowly and slowly, the relay Z recovers, but if the electric holder TK continues to be pressed at this time (if the operator keeps pressing the electric holder TK), the relay Z will restore the corresponding model holder T.
The operation continues until K is released.

When relay W is restored and then relay Z is restored, the connector relay ON is earth - contact cn0 - relay ON - contact cn' contact w3 -
The resistor R1-battery loop maintains operation and maintains the connection between the newly acquired office line bidirectional trunk BWT (41) and the relay stand ATT.

As explained above, in the connector control circuit according to the present invention, the delay recovery time of the relay W does not work in the direction of delaying the trunk activation timing of the relay stand ATT (relay W
The slow and slow recovery is used exclusively to guarantee the operation of the relay SUP, and is not used to guarantee the time to confirm the recovery of the previously captured trunk connector relay ON, as in the conventional example. Not yet.

) Also, each trunk connector relay ON contact Cn'
Since the activation circuit of relay Z is configured via the chain circuit formed by In this case, when the relay W operates, the relay Z starts and operates immediately, so that the trunk can be captured with a stable and short activation timing.

Therefore, the time required for the trunk acquisition operation at the attendant stand ATT is shortened, and as a result, the operator's call processing is carried out quickly, and the present invention has extremely significant effects.

In the description of the embodiment, a bidirectional central office line trunk BWT is taken as an example, but it is clear that the present invention can be implemented with a trunk connected to an outside line such as a private line, or a trunk for calling an operator.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing a conventional example, and FIG. 2 is a circuit diagram showing an embodiment of the present invention. The main symbols in each figure are as follows. BWT・・・・・・Direct office line bidirectional trunk, POS...
...Seat device, ATT...Relay stand, ON...
... Connector relay, SUP ... Supervision relay, W, Z ... Timing relay, Ro, 0.
...Resistor and capacitor for slow recovery, TK...
...Trunk start power.

Claims (1)

[Claims] 1 Automatic private branch exchange equipment that has a common device that is controlled by the operator, etc., and multiple individual devices such as trunks that are connected to the common device, and controls for individually connecting the individual devices to the common device. In the circuit, a connector relay provided corresponding to each of the plurality of individual devices in order to connect the common device and the individual device, and a chain circuit configured by the individual contacts of the connector relay; A starting relay is provided to control the starting of the connector relay, and the operating path of the starting relay is formed via the chain circuit, and after all the connector relays are restored, a loop is formed via the chain circuit. A connector control circuit characterized in that the connector relay is activated by: