JPS6094594A - Leased-line originating connection system - Google Patents

Abstract

PURPOSE:To allow connection to a subscriber at an opposite-station side whose final digit is different by only redialing the final digit of the subscriber at the opposite-station side while the line of the subscriber at the opposite-station side is busy by providing a busy-tone detecting circuit which is connected to a leased- line trunk. CONSTITUTION:An extension subscriber STA1 originates a leased-line through a leased-line trunk TLT1 for a subscriber at an opposite side STA21. While the line of the subscriber of the STA21 is busy at this time, a busy-tone detecting circuit BTO detects this, and connects the subscriber STA1 to a sending register trunk ORT. Next, when the subscriber STA1 dials the STA21 and a subscriber STA22 only whose final-digit number is different from that of STA21. According to this, the subscriber STA1 is connected to the subscriber STA22. By only redialing the final digit in this way, it is possible to connect to the subscriber at the opposite-station side with the different final digit.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to an automatic private branch exchange device. In particular, in the conventional device, when a leased line call is made and a subscriber on the opposite side is encountered while the subscriber on the other side is talking, the subscriber on the opposite side is Even when connecting to a subscriber on the other side whose extension number differs only in the last digit, the receiver must be hung up and the leased line originating number and leased line subscriber number must be dialed again. Subscribers calling from a leased line generally have consecutive numbers ranging from 111 to 11, so even if one subscriber is busy, calling within that last number will result in a call from the same section. can be called.

[Purpose of the invention]

The present invention is based on the above-mentioned traitor, and when an extension subscriber makes a special Jl@departure 8 and encounters a subscriber on the opposing side talking, the other subscriber number of the last digit of the subscriber number on the opposing side is dialed. A game with only the last digit of the extension number different from the subscriber on the other side encountered during the call (lI11) Dedicated to connect to subscribers, non-use line originating that enables step calls when making line calls (n connection method) The purpose is to provide.

[Features of the invention]

The present invention provides a line circuit for accommodating extension subscribers, a dedicated 11 line trunk connected to a dedicated device, a transmission register trunk for storing transmission number information, the line circuit, the dedicated line trunk, and the In a private telephone exchange system comprising a switch for connecting a transmitting register trunk and a control device for controlling the switch, and configured to enable automatic calls from the extension subscriber to the dedicated line,
A busy tone detection circuit for detecting a busy tone arriving on the leased line is connected to the leased line trunk, and the control circuit detects the busy tone from the busy tone detection circuit after making a leased line call. When the output is sent out, the transmitting register trunk is connected to the calling extension subscriber, the last digit number of the leased line game is received by a dial signal from the calling extension subscriber, and the leased line trunk is reset. The present invention is characterized in that only the last digit of the number of the game on the leased line when the above-mentioned leased line call is made is replaced with the last digit number, and the signal is sent to the leased line.

[Explanation based on examples]

Embodiments of the present invention will be described with reference to the drawings. The figure is a block diagram of a leased line origination connection system according to an embodiment of the present invention. In the figure, extension subscriber STA.

The telephone device , is connected to the switch W1 via the line circuit LC, and signals are exchanged. The switch sw is connected to the switch SW2 via dedicated 411 line trunks TLT, ., TLT2k, and signals are exchanged. Also,
The switch fEW1 has the switch SW2 connected to the transmission register trunk ORT connected to the opposite subscriber 5TA2.
．． 5TA22 telephone Tf4. L2. , position 2□ are connected. The switch SW2 is also connected to an incoming call register trunker RT.

Here, the feature of the present invention is that the busy tone signal from the dedicated trunk TLT is sent to the dedicated line surrounded by the dashed line rτ1 (minutes).
Connected to D. The output of the busy tone detector BTD and the output of the transmission register trunk ORT are both output from the control device 0O.
Connected to NT. Control device C! The ONT is connected to the central processing unit CPU, and the central processing unit cpty is connected to the main memory MM, and signals are exchanged. One output of the control signal of the control device C0N1' is sent to the sender 5IJ.
D and the line circuit LO. Good luck, control device 0O
The other output of the control signal W of N'r is connected to the switch SW.

The sending exchange KPBX includes switches SW, line circuit LO1 leased line trunk TLT1. It includes a sending register trunk ORT, a sender EJND and a leased line connection part of the invention. The terminating side exchange FiPBX2 is switch S
W2, leased line trunk TLT, and incoming register trunk IRT. The leased line connection method uses the originating exchange FiPBX, the terminating exchange IDPBX2, and the telephone equipment 2. , TFiL22.

The operation of the dedicated line originating 1G connection system having such a configuration will be explained. First, when the extension subscriber STA picks up the handset of the telephone device, the extension subscriber BTA, f
f. Connected to the outgoing register trunk ORT and hear the outgoing tone. At this time, the central processing unit CPU
The storage location information of TA is stored in the memory corresponding to the outgoing register trunk ORT in the main memory device MM.

Next, the extension subscriber EITA sends the leased line calling number to the opposing subscriber 5TA2. When the number is dialed, the outgoing register trunk ORT counts this number and sends the numerical information to the central processing unit CPU via the control unit C0NT.

As a result, the central processing unit CPU stores numerical information in the memory corresponding to the extension subscriber STA in the main storage device MM, and also stores the numerical information in the memory corresponding to the extension subscriber STA in the main storage device MM, and
, and all connections are made from the sender SND to subscriber 5TA2 on the opposing side.
．． The number information of the extension subscriber EITA is sent to the destination exchange EPBX2, and the accommodation position information of the extension subscriber EITA is stored in the memory corresponding to the leased line trunk TLT in the main storage device M'M. The central processing unit CPU is connected to the subscriber 5TA2 on the opposing side.
．． When the sending of number information is completed, the extension subscriber STA
, and the links between the originating register trunk ORT and between the sender SND and the private line trunk TLT, and close the link between the extension subscriber ETA and the private line trunk TLT. As described above, the extension subscriber STA is connected to the destination exchange P:PBX2, but at this time, the opposite subscriber 5TA2. If the extension subscriber EITA encounters a busy tone during a call, the subscriber EITA hears a busy tone from the receiving exchange EPBX 2, and the busy tone detector FITD installed in the leased line trunk TLT detects this busy tone. detect, fl
Central processing unit CP via ill jail device C0NT
Send to U. As a result, the central processing unit CPU restores the link between the leased line trunk TLT and the extension subscriber EITA, and connects the extension subscriber STA connected to the leased line trunk TLT and the transmission register trunk ORT. Then, the extension subscriber STA is the subscriber EITA on the other side.
Opponent side subscriber 5TA2 differs only in the last digit number from 2+
When the last digit number 2 is dialed, the transmission register trunk ORT counts this number and sends the last digit number information to the central processing unit CPU via the control device 0ONT.

From this K, the central processing unit CPU determines that the extension subscriber STA in the main memory MM, the extension subscriber STA stored in the corresponding memory, and the opposite subscriber 5TA dialed first.
2. Convert only the last digit number information of the subscriber 5T on the opposing side.
Set the number information to A22. Then, after a certain period of time (the time required for recovery of the leased line trunk TLT2 on the receiving side), the central processing unit CPU closes the link between the sender SND and the leased line trunk TLT again, and adds the extension in the main memory MM. The sender STA sends the number information of the opposing subscriber 5TA22 stored in the corresponding memo IJK to the sender S
From ND to dedicated line trunk TLT, to destination exchange F via
! PBX 2 and closes the link between the dedicated line trunk TLT and the extension subscriber 5TA4, so that the extension subscriber STA encounters the other party subscriber 5TA2 while it is busy.
ll l, if you are on the other side, just dial the last digit of the subscriber number on the other side to 1 and you will be able to contact the subscriber on the other side during the call. Opponent subscriber 5T who differs only in the last digit of the number
Connected to A22 (U), enabling step calls when making a dedicated line call.

〔Effect of the invention〕

As explained above, the present invention provides a busy tone detection circuit connected to a leased line trunk,
/l'i <The number information dialed by this extension subscriber at 8 o'clock is stored, and the busy tone detection circuit detects the busy tone.IJI
By configuring the system to send the dial number information with the last digit converted when the number is L, the extension subscriber can make a call to the dedicated ITI line and the subscriber on the other side can make a call while the subscriber on the other side is talking.
When making a leased line call to connect to a subscriber on the other side whose extension number is different only in the last digit from the subscriber on the other side encountered during the call, the user only dials a different number in the last digit of the subscriber number on the other side. It has an elegant effect that allows you to make step calls.

[Brief explanation of drawings]

The figure is a block diagram of a dedicated line origination connection system according to an embodiment of the present invention. B: Busy tone detector, CC: Communication line, C! O
NT...Control unit, CPU...Central processing unit 0, E
PBX, ... transmission (i-side exchange, PPBX 2...
・Receiving side exchange, IRT...Receiving register trunk,
LO...Line circuit, MM...Main memory, ORT
...Outgoing register trunk, SND center,
EITA, . . . extension subscriber, 5TA2. ．． 5TA22
...Subscriber on the opposing side, SW...Switch. Patent applicant Naotaka Ide, agent of Nippon Gunki Co., Ltd., patent attorney

Claims (1)

[Claims] (1) A line circuit that accommodates internal/line subscribers, a dedicated line trunk connected to the dedicated line, a sending register trunk that stores transmission number information, the above line circuit, the above dedicated line trunk, and the above sending register. A private telephone exchange system, which is equipped with a switch for connecting the trunk and a control device to control this switch, and is configured so that automatic calls from 13 extension subscribers to the above-mentioned dedicated line are stopped. A busy tone detection circuit for detecting busy tone arriving on the leased line is connected to the dedicated blue trunk, and the control circuit detects the busy tone detecting circuit from the busy tone detecting circuit after making a call to the leased line. When a medium tone detection output is sent, connect the above-mentioned transmitting register trunk to the originating extension subscriber, receive the last digit number of the dedicated line game (i) by the dial signal from the originating extension subscriber, and send the above-mentioned dedicated In addition to resetting the line trunk, only the last digit of the number of the game on the leased line at the time of making the above-mentioned leased line call is changed to this last digit number, and the call is sent to the leased line. Dedicated line origination connection method.