JPH06217018A - Automatic multi-circuit outgoing control system - Google Patents

Abstract

PURPOSE:To connect a call to a called subscriber as quickly as possible in an automatic multi-circuit outgoing control system for a communication equipment which contains plural terminal equipments and is connected to a communication network via plural communication channels. CONSTITUTION:When a connection request is given to a called circuit 500 to be housed in a communication network 300 from a terminal equipment 100, plural designated communication channels 200 are successively selected and the calls are sequentially connected to the circuit 500 by a sequential outgoing means 401 via each selected channel 200 and the network 300. A connection deciding means 402 monitors each connection state secured by the means 401 (based on the signal sounds, etc.) to immediately release the connection in an unconnectable state and then discontinues the subsequent connection operations when a single connectable state is detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic transmission control system for a plurality of lines in a communication device such as a private branch exchange or a simple exchange telephone device which accommodates a plurality of terminal devices and is connected to a communication network by a plurality of communication paths. Regarding

[0002]

2. Description of the Related Art For example, in a conventional private branch exchange,
When a caller makes a call from a telephone extension to a subscriber accommodated in a public communication network, if the caller encounters during a call, the caller disconnects the call once, and tries again after a while, The above operation is repeated until the call setup with the called subscriber is successful.

As a result, the caller repeats the call setting operation such as the off-hook / on-hook operation and the operation of selecting the called subscriber number until the connection with the called subscriber is successful. The private branch exchange holds the latest called party number sent from the extension telephone, disconnects the call once when the connection with the called party is not successful, and the predetermined interval [ For example, a device having a so-called automatic recall function, which automatically repeats calling a predetermined number of times (for example, three times) at intervals of 20 seconds, has been put into practical use.

If this kind of automatic recall function is used, the labor of the caller is greatly reduced.
If the called subscriber does not respond within a certain period of time, it is necessary to set a long repeat cycle because measures are taken such as repeated recalls.

Even in a simple exchange telephone device (so-called button telephone device) in which a plurality of telephones share a plurality of telephone lines, a situation similar to that of the private branch exchange described above occurs.

[0006]

As is apparent from the above description, in a conventional private branch exchange or the like, when an extension telephone calls a subscriber accommodated in a public communication network,
When encountered during a call, the caller needs to repeat the call setup operation until the call setup with the called subscriber is successful, which causes the caller to spend a great deal of effort.

In order to solve such a problem, a private branch exchange equipped with an automatic recall function has been put into practical use, but there is a problem that the repetition cycle becomes long and it takes a long time to succeed in connection.

An object of the present invention is to make it possible to connect to a called subscriber as quickly as possible.

[0009]

FIG. 1 is a diagram showing the principle of the present invention. In FIG. 1, 400 is a communication device that is the subject of the present invention, 300 is a communication network, and 100 is a communication device (40
0) is a plurality of terminal devices, 200 is a plurality of communication paths connecting the communication device (400) and the communication network (300), and 500 is a called line accommodated in the communication network (300).

401 is a communication device (40
It is a sequential transmission means provided in 0). Reference numeral 402 is a connection determining unit provided in the communication device (400) according to the present invention.

[0011]

The sequential transmission means (401) is used for the terminal device (10).
0) to the called line (50) accommodated in the communication network (300)
0) when a connection is requested, the communication path (20
0), a plurality of designated communication paths (200) are sequentially selected, and the selected communication paths (200) and communication networks (30) are selected.
0) to sequentially try to connect to the called line (500).

The connection determining means (402) monitors each connection state by the transmitting means (401) in sequence, immediately releases the connection that becomes unconnectable, and detects one connection that becomes connectable. , Stop the subsequent connection operation.

It is considered that the connection determining means (402) discriminates whether or not each connection can be made by a signal sound returned from the communication network (300). Communication device (400)
Is considered to be a private branch exchange or a simple exchange telephone device.

Therefore, since a plurality of connections are set in parallel via a plurality of communication paths, a large number of connections can be repeated in a short time, and the time required for successful call setup can be shortened. The serviceability to the caller is greatly improved.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 2 is a diagram showing a private branch exchange according to an embodiment of the present invention, FIG. 3 is a diagram showing an example of an automatic transmission processing process in FIG. 2, and FIG. 4 is a diagram showing an example of a signal sequence in FIG. Yes, FIG. 5 is a diagram showing an example of the originating station line designation situation in FIG. The same reference numerals denote the same objects throughout the drawings.

In FIG. 2, a private branch exchange (1) is shown as the communication device (400) in FIG.
Multifunctional telephone (2) as a terminal device (100) in
1 is shown, the public network (PTN) (3) is shown as the communication network (300) in FIG. 1, and the central line (5) is shown as the communication path (200) in FIG.
The called subscriber (4) is shown as the called line (500) in.

The private branch exchange (1) accommodates a plurality of multi-function telephones (2) as extensions, and a plurality of office lines (5) [individual office lines are referred to as (5 ₁ ) to (5 _N ), The same applies hereinafter)
Is connected to the public communication network (PTN) (3) by
Network (NW) (11), Central Control Unit (CC)
(12) and a main memory (MM) (13).

The central control unit (CC) (12) of the private branch exchange (1) is provided with a sequential transmission section (121) as the sequential transmission means (401) in FIG. 1, and the connection determination in FIG. A connection determining unit (122) is provided as the means (402).

Each multifunction telephone (2) has a line terminal (L).
T) (201), circuit termination unit (CT) (202), code decoding unit (CODEC) (203), speech circuit (SPC)
(204), handset (TR) (205), speaker (2)
06), control unit (CTL) (207), display control unit (L)
CC) (208), display section (LCD) (209), number button section (DK) (210), lamp section (LP) (21)
1) and a function button unit (FK) (212) are provided, only the configuration of one multifunction telephone (2) is shown in FIG. 2, and the configuration of the other multifunction telephones (2). Is omitted.

In the function button section (FK) (212), station line buttons (CK) corresponding to each station line (5) connecting the private branch exchange (1) and the public communication network (PTN) (3), In addition to one extension button (EK), one automatic call button (OK) is provided according to this embodiment.

In FIG. 2 to FIG. 5, the caller is called from the vacant multifunction telephone (2 ₁ ) to the public communication network (PT).
N) In case of connecting to the called subscriber (4) accommodated in (3) by using the automatic calling function, it is provided in the function button section (FK) (212) of the multifunction telephone (2 ₁ ). Press the automatic call button (OK).

In the multi-function telephone (2 ₁ ), when the control unit (CTL) (207) detects the pressing of the automatic call button (OK), an automatic call button signal (ok) is created and the circuit termination unit (ok) is generated. It is transferred to the private branch exchange (1) via the CT (202) and the line terminating unit (LT) (201).

In the private branch exchange (1), the central control unit (CC) (12) sends an automatic call button signal (ok) transferred from the multifunction telephone (2) to the network (N).
W) (11) is received and analyzed, and the multifunctional telephone (2
_When it is detected that the automatic call button (OK) is pressed in 1) (step S1 in FIG. 3), the automatic call section (12)
1) Start up.

The activated automatic transmission unit (121) creates a confirmation display signal (ak _ok ) for indicating that the automatic transmission function has been activated, and the multifunction telephone (11) via the network (NW) (11). 2 ₁ ) (step S)
2).

In the multifunction telephone (2 ₁ ), the control unit (CTL) (207) sends the confirmation display signal (ak _ok ) transferred from the private branch exchange (1) to the line termination unit (LT).
(201) and the circuit termination unit (CT) (202), the display control unit (LCC) (208) notifies the display unit (LCD) (209) that the automatic transmission function has been activated. Display it.

When the caller recognizes the activation of the automatic transmission function by the display unit (LCD) (209), the N provided between the private branch exchange (1) and the public communication network (PTN) (3). Of the station lines (5 ₁ ) to (5 _N ), four station lines (5) [for example, station line (5 ₁ ), ( 5 _2), (5
₃₎ and _(4)] and be used for this automatic transmission, a function button unit (FK) (corresponding office line button _{212) (CK 1), (} CK 2), (CK 3) and Press (CK ₄ ) sequentially.

In the multi-function telephone (2), the control unit (CTL) (207) has a function button unit (FK) (21).
2) Station line buttons (CK ₁ ), (CK ₂ ), (CK ₃ )
When the pressing of (CK ₄ ) and (CK ₄ ) is detected, station line button signals (ck ₁ ), (ck ₂ ), (ck ₃ ), and (ck ₄ ).
Is created and transferred to the private branch exchange (1) through the circuit termination unit (CT) (202) and the line termination unit (LT) (201).

In the private branch exchange (1), the central control unit (CC) (12) transmits the central office line button signals (ck ₁ ), (ck ₂ ), (ck ₂ ) transferred from the multi-function telephone (2 ₁ ).
₃ ) and (ck ₄ ) to the network (NW) (1
It is received and analyzed via ₁ ), and when it is detected that the local line buttons (CK ₁ ), (CK ₂ ), (CK ₃ ) and (CK ₄ ) are pressed in the multi-function telephone (2) (step S3). ), And notifies that to the automatic transmission unit (121).

The automatic transmission section (121) has the station line buttons (CK ₁ ), (CK ₂ ), (CK ₃ ) and (C ₃ ) which are pressed.
It is determined that the station lines (5 ₁ ), (5 ₂ ), (5 ₃ ) and (5 ₄ ) corresponding to K ₄ ) have been designated for this automatic transmission, and the main memory (MM) (13) Multi-function telephone in (2
Source station line storage area corresponding to _{1) (CM) (131 1} )
The identification information of the designated station lines (5 ₁ ), (5 ₂ ), (5 ₃ ) and (5 ₄ ) is stored in the [station line (5 ₁ ),
The identification information of (5 ₂ ), (5 ₃ ) and (5 ₄ ) is simply referred to as station lines (5 ₁ ), (5 ₂ ), (5 ₃ ) and (5 ₄ )].

The automatic transmission unit (121) is used for automatic transmission from the multi-function telephone (2 ₁ ) to the central lines (5 ₁ ), (5 ₂ ),
If (5 ₃ ) and (5 ₄ ) are specified, only one of the lines (for example, the office line (5 ₁ )) is a multifunction telephone (2
_It is dedicated to ₁ ) and closes to other multi-function telephones (2 ₂ ) to (2 _N ), but the other 3 lines [eg office line (5 ₂ ), (5 ₃ ) and (5 ₄ )] ] Is not dedicated to the multi-function telephone (2 ₁ ) but to other multi-function telephones (2 ₂ )
It is also possible to use it for (2 _N ).

Therefore, for example, as shown in FIG.
Telephone (2₂) Is the local line (5₆) To (5₉) Is automatically sent
Designated as a multi-functional telephone (2₃) Is the local line (5
₇) To (5_Ten) Is specified for automatic transmission,
(5₆) Is a multifunction telephone (2 ₂) Dedicated to the local line (5
_Ten) Is a multifunction telephone (2₃), But the local line (5
₇) To (5₉) Are multi-function phones (2₂) And
(2₃) Is shared.

The automatic transmission section (121) displays the usage status of the above-mentioned station lines (5 ₁ ) to (5 ₄ ) to the caller so that the lamp section (LP) of the multi-function telephone (2 ₁ ) can be used. ) (21
1) Among the lamps provided corresponding to the respective station line buttons (CK ₁ ) to (CK _N ), the multifunction telephone (2 ₁ )
The lamp corresponding to the designated local line (5 ₁ ) [that corresponds to the local line button (CK ₁ )] is continuously turned on, and other multifunction telephones (2 ₂ ) to (2 _N ) can also be used. Na station line (5
₂₎ to correspond to (5 ₄₎ [i.e. office line button (C
Corresponding to K ₂ ) to (CK ₄ )] A confirmation display signal (ak _ck ) for blinking the lamp is generated, and the network (N
W) (11) to the multifunction telephone (2 ₁ ).

In the multi-function telephone (2 ₁ ), the control unit (CTL) (207) sends the confirmation display signal (ak _ck ) transferred from the private branch exchange (1) to the line termination unit (LT).
When it is received via (201) and the circuit termination unit (CT) (202), the lamp unit (LP) (211) is turned on or blinked as described above.

It should be noted automatic transmission unit (121), the station line (5 ₁₎ is enhanced phone only and has been that of (2 _1), multi-function telephone (2 ₁₎ other than the multifunction telephone set ₍₂ 2)
To display also to (2 _N ), transfer a known signal,
The lamps of the respective lamp parts (LP) (211) corresponding to the local line (5 ₁ ) [that is, corresponding to the local line button (CK ₁ )] are continuously turned on.

[0035] Still other multifunction telephone (2 ₂₎ to the (2 _N) is the office line (5 ₂₎ to correspond to (5 ₄₎ [i.e. office line button (CK ₂₎ to (CK ₄₎ Corresponding] lamp is not blinking, so that, as mentioned above, other multi-function telephones (2 ₂ ) to (2 _N ) can be designated redundantly for automatic transmission.

The calling party indicates that the office lines (5 ₁ ) to (5 ₄ ) have been designated for automatic transmission by the lamp section (LP) (21).
When it is recognized by the lighting or blinking state of 1), the number button section (DK) (210) is operated, and the station line transmission special number (S)
N) and the called subscriber number (DN) given to the called subscriber (4) by the public communication network (PTN) (3).

In the multi-function telephone (2 ₁ ), the control section (CTL) (207) has a numeric button section (DK) (21).
When the selection of the station line originating special number (SN) and the called party number (DN) by 0) is detected, the corresponding station line originating special number signal (sn) and the called party number signal (dn) are created, and the circuit is created. The data is transferred to the private branch exchange (1) via the terminal unit (CT) (202) and the line terminal unit (LT) (201).

In the private branch exchange (1), the central control unit (CC) (12) transmits a central line originating special number signal (sn) and a called subscriber number signal (dn) transferred from the multifunction telephone (2). Is received and analyzed via the network (NW) (11), and it is detected that the office line originating special number (SN) and the called subscriber number (DN) are selected in the multifunction telephone (2 ₁ ) ( In step S4), the automatic transmission unit (121) is notified of that fact.

The automatic transmission unit (121) stores the selected called subscriber number (DN) in the called telephone number corresponding to the multi-function telephone (2 ₁ ) in the main memory (MM) (13). It is stored in the area (DM) (132 ₁ ), and the special line number (SN) and the called subscriber number (DN) are displayed on the display unit (LCD) (209) of the multi-function telephone (2 ₁ ). A confirmation display signal (ak _sdn ) is created and transferred to the multifunction telephone (2 ₁ ) via the network (NW) (11) (step S5).

In the multi-function telephone (2 ₁ ), the control unit (CTL) (207) sends the confirmation display signal (ak _sdn ) transferred from the private branch exchange (1) to the line termination unit (LT).
(201) and the circuit termination unit (CT) (202), the selected local line transmission special number (SN) is displayed on the display unit (LCD) (209) via the display control unit (LCC) (208). ) And called party number (DN).

The calling party displays on the display section (LCD) that the station line originating special number (SN) and the called party number (DN) are correct.
When it is recognized by (209), the extension button (EK) provided on the function button section (FK) (212) is pressed in order to start execution of the automatic transmission connection.

In the multi-function telephone (2 ₁ ), when the control unit (CTL) (207) detects that the extension button (EK) is pressed, it creates an extension button signal (ek) and terminates the circuit (CT). (202) and line termination (LT) (2
01) to the private branch exchange (1).

In the private branch exchange (1), the central control unit (CC) (12) sends the extension button signal (ek) transferred from the multifunction telephone (2) to the network (NW).
Multi-function telephone (2 ₁ ) that receives and analyzes via (11)
When it is detected that the extension button (EK) has been pressed in step S6 (step S6), the automatic transmission unit (121) notifies that fact.
To notify.

The user who has been notified of pressing the extension button (EK)
The dynamic transmission unit (121) is in the main memory (MM) (13).
Multifunctional telephone (2₁) Corresponding transmission line storage area
(CM) (131₁) Stored in the local line (5₁) To (5
_Four), The first station line (5 ₁) Is elected (step
S7) and multi-function telephone (2₁) Called phone
Number storage area (DM) (132₁Called subscribers stored in
Person number (DN) is extracted and the selected station line (5₁) From public
Off-hook signal (of) to the public network (PTN) (3)
Send, followed by calling party number (DN), public
While executing the intelligence transmission process (step S8), transmission
Start measurement of elapsed time (t) after processing, and further determine connection
The section (122) is activated (step S15).

The automatic transmission unit (121) has an automatic transmission interval (T) in which the elapsed time (t) to be measured is preset.
When it is detected that [for example, 2 seconds] has been reached (step S
15), a transmission line storage area (CM) (131) corresponding to the multifunction telephone (2 ₁ ) in the main memory (MM) (13)
_The next station line [for example (5 ₂ )] is selected from ₁ ) (step S16), and the public communication network (P) is selected from the selected station line (5 ₂ ).
The off-hook signal (of) and the called subscriber number (DN) are sent to the TN (3), and the call origination process for the called subscriber (4) similar to the above is performed by the call through the station line (5 ₁ ). While executing in parallel with the setting process (step S8),
The measurement of the elapsed time (t) after the calling process is started.

Similarly, every time the automatic transmission unit (121) detects that the elapsed time (t) after the transmission processing has reached the automatic transmission interval (T) (step S15), the transmission station line storage area is set. (CM) (131 ₁ ) to the next station line [for example (5
₃₎ and sequentially selects the (5 _4)] (step S1
6) The calling process is executed from the selected station lines (5 ₃ ) and (5 ₄ ) to the called subscriber (4) (step S).
8).

On the other hand, the activated connection determination unit (122)
Monitors the signal tones returned from the station line (5 ₁ ) that is the target of transmission processing, and makes a ringing tone (RBT) and a busy tone (B
T) is identified (steps S9 and S).
13).

Here, after the automatic transmission unit (121) sequentially executes transmission processing via each station line (5 ₂ ), (5 ₃ ) and (5 ₄ ), the station lines (5 ₁ ) and (5 Each outgoing connection via ₂ ) and (5 ₃ ) is encountered in turn, and from the public network (PTN) (3) to the central line (5 ₁ ), (5 ₂ )
Suppose that the busy tone (BT) is sequentially returned via and (5 ₃ ).

In the private branch exchange (1), the connection determination unit (122) sequentially operates from the public communication network (PTN) (3) via the office lines (5 ₁ ), (5 ₂ ) and (5 ₃ ). Network (NW) that busy tone (BT) was sent back
When it is detected via (11) (step S13), the outgoing connection via the office lines (5 ₁ ), (5 ₂ ) and (5 ₃ ) is released, and the office lines (5 ₁ ), (5 ₂ ) and (5 ₃ ) is put on standby for the next transmission process (step S14).

[0050] Furthermore an automatic transmission unit (121) detects that the office line ₍₄₎ the time elapsed after the calling process via the (t) has reached the automatic re-call period (T) (step S
15), selecting the already released station line (5 ₁ ) from the source station line storage area (CM) (131 ₁ ) (step S16),
Calling processing is executed from the selected station line (5 ₁ ) to the called subscriber (4) (step S8), and thereafter, similarly, after the station line (5 ₂ ) which has been released with an automatic call interval (T). The transmission process is sequentially executed via the.

Here, the public communication network (PTN) (3) is a station.
Line (5₁) Succeeded in connecting to the called subscriber (4)
However, if a calling signal is sent to the called subscriber (4),
To the local line (5₁) To the private branch exchange (1)
After returning the (RBT), at the private branch exchange (1)
Is a public communication network (PTN).
From (3) to the local line (5₁) Via the ringtone (RBT)
It is returned via the network (NW) (11).
And then detect (step S9), the local line (5₁) Via
The call setup to be performed is determined as the call setup for the called subscriber (4), and
In addition to starting and stopping the dynamic transmission part (121),
The automatic transmission unit (121) transmits before (RBT) is detected.
Treated local line (5₂) To Public Network (PTN) (3)
Release signal (rs) to network (NW) (11)
To release the connection being set up (step
S10), central control unit (CC) (12), multi-function
Telephone (2 ₁) To the called subscriber (4),
Local line (5₁) Notify that you have decided to go through,
Start and stop.

The central control unit (CC) (12) controls the network (NW) (11) to set a communication path between the office line (5 ₁ ) and the multifunction telephone (2 ₁ ) and The ring back tone (RBT) returned from the communication network (PTN) (3) via the station line (5 ₁ ) is returned to the multi-function telephone (2 ₁ ), and in the multi-function telephone (2 ₁ ), Communication network (P
The ring back tone (RBT) returned from the TN (3) through the private branch exchange (1) is a line termination (LT) (20).
1), circuit termination unit (CT) (202), code decoding unit (C)
ODEC) (203), call circuit (SPC) (204)
It is transmitted from the speaker (206) via the.

When the caller hears the ringing tone (RBT) sent from the speaker (206), the handset (TR)
(205) picks up and waits for the response of the called party (4).
Enhanced phone in the (2 _1), the control unit (CTL)
When (207) detects that the handset (TR) (205) has been picked up, an off-hook signal (of) is created, and a circuit termination unit (CT) (202) and a line termination unit (LT) (201). To the private branch exchange (1).

On the other hand, when the called subscriber (4) receiving the call signal responds, a response signal is sent from the public communication network (PTN) (3) to the private branch exchange (1) via the station line (5 ₁ ). (An) is transferred.

In the private branch exchange (1), the central control unit (CC) (12) transfers a response signal (an) transferred from the public communication network (PTN) (3) via the office line (5 ₁ ).
Is received via the network (NW) (11), the response signal (an) is returned to the multi-function telephone (2 ₁ ) by a known procedure.

As described above, the private branch exchange (1) and the central office line (5) are provided between the multi-function telephone (2 ₁ ) and the called subscriber (4).
₁ ) and the public communication network (PTN) (3) are used to set up a call path, and the voice signals (sp) sent by the calling party and the called subscriber (4) are transferred to each other to make a call. It will be possible.

In step S5 of FIG. 3, the calling party determines that the display unit (LCD) (20) of the multifunction telephone (2 ₁ ).
An error is detected in the station line originating special number (SN) and called party number (DN) displayed in 9), and the automatic originating button (O)
When K) is pressed again, the automatic call button signal (ok) is transferred from the multi-function telephone (2 ₁ ) to the private branch exchange (1) in the same process as described above, and in the private branch exchange (1),
Automatic transmission unit (121) detects that the automatic transmission button (OK) is pressed in the multifunction telephone (2 ₁₎ (step S17), and releases the transmission processing by the multi-function telephone (2 ₁₎ (step S18 ).

Further, the caller does not press the automatic call button (OK) but immediately operates the numeric button section (DK) (210) to call the station line special number (SN) and the called subscriber number (DN). ) Is selected, the private branch exchange (1) does not receive the automatic call button signal (ok) but receives the station line calling special number signal (sn) and the called subscriber number signal (dn). The multi-function telephone (2 ₁ ) identifies that it has made a call to the public communication network (PTN) (3) in a normal procedure, and executes a normal call process to the public communication network (PTN) (3) (step S1). , S19, S20).

As is clear from the above description, the present embodiment
According to the caller, ₁) Automatic call button
(OK) and local line button (CK₁) To (CK_Four)
After pressing, press the number button (DK) (210)
Specify the local number (SN) and the called subscriber number (DN)
Selected and confirmed by the display (LCD) (209)
Then, press the extension button (EK) and the private branch exchange
(1) is the designated station line (5 ₁) To (5_Four) Via
Order by the specified automatic transmission interval (T) [for example, 2 seconds]
Called to the next public communication network (PTN) (3) and the called subscriber
The calling process is performed because the calling process for (4) is executed in parallel.
Self-confidence repeatedly makes calls, station line special number (SN) and called
Compared with the conventional method of selecting the subscriber number (DN),
Labor is greatly reduced, and like the conventional automatic recall,
From single-line office line (5) to public communication network (PTN) (3)
Based on the result of the call origination and success or failure of connection to the called subscriber (4)
Compared to the case where call setup is repeated every 20 seconds,
The communication interval (T) is much shortened, and the call setup processing time is greatly increased.
Shortened.

It should be noted that FIGS.
This is only an example, and the connection decision unit (122) decides to use it, for example.
The station line (5) to be used is the station line (5₁) To
There is no limitation, and the central line (5₂) To (5_Four) What
Although it may be considered that this is the case, the present invention is also applicable to such cases.
The effect of does not change. In addition, multifunction telephone (2₁) Is the local line
(5₂) To (5_Four) All available
It is not limited to the one shown in FIG.
Phone (2₂) And (2₃), The local line (5 ₇) Or
(5₉) Is shared, the station line (5₇) Or
(5₉) Is another multifunction telephone (2₂) Or (2₃) To
It is considered that it will be used more, but in such a case
Select by avoiding the station line (5) being used by the automatic transmission unit (121)
There are many other variations that can be considered, such as selecting
However, the effect of the present invention does not change. Also specified by the caller
The station line (5) is not limited to four lines, and it is an automatic call
Arbitrary setting is considered in relation to the interval (T)
However, even in such a case, the effect of the present invention does not change. Again
The continuation determination unit (122) identifies the success or failure of the call setup by a signal tone.
It is not limited to what is used, but public communication network (PT
N) A signal indicating the call setup process from (3) [for example, ringing message]
No. or call release request signal, etc.)
Many other variations are considered, such as monitoring the signal,
In any case, the effect of the present invention does not change. Further invention
Target communication device (400) and terminal device (10
0) is a private branch exchange (1) and a multifunction telephone as shown
It is not limited to machine (2), simple exchange telephone device
Many other variations such as the so-called button telephone device are considered.
However, the effect of the present invention does not change in any case.

[0061]

As described above, according to the present invention, in the communication device, since a plurality of calls are set in parallel via a plurality of communication paths, a large number of connections can be repeated in a short time. The time required for successful call setup is shortened, and the serviceability to the caller is greatly improved.

[Brief description of drawings]

FIG. 1 is a diagram showing the principle of the present invention.

FIG. 2 is a diagram showing a private branch exchange according to an embodiment of the present invention.

FIG. 3 is a diagram showing an example of an automatic transmission process in FIG.

FIG. 4 is a diagram showing an example of a signal sequence in FIG.

FIG. 5 is a diagram showing an example of the originating station line designation situation in FIG.

[Explanation of symbols]

 1 Private branch exchange 2 Multi-function telephone 3 Public communication network (PTN) 4 Called subscriber 5 Station line 11 Network (NW) 12 Central control unit (CC) 13 Main memory (MM) 100 Terminal device 121 Automatic transmission unit 122 Connection Determining unit 131 Calling station line storage area (CM) 132 Called telephone number storage area (DM) 200 Communication path 201 Line termination unit (LT) 202 Circuit termination unit (CT) 203 Code decoding unit (CODEC) 204 Speech circuit (SPC) ) 205 Handset (TR) 206 Speaker 207 Control part (CTL) 208 Display control part (LCC) 209 Display part (LCD) 210 Numerical button part (DK) 211 Lamp part (LP) 212 Function button part (FK) 300 Communication Network 400 Communication device 401 Sequential transmission means 402 Connection determination means 500 Called line

Claims (4)

[Claims] 1. A communication device (400) for accommodating a plurality of terminal devices (100) and connected to a communication network (300) by a plurality of communication paths (200), comprising: When a connection is requested to the called line (500) accommodated in (300), a plurality of designated communication lines (200) among the communication lines (200) are sequentially selected and selected. Sequential transmission means (401) for sequentially attempting to connect to the called line (500) via each communication path (200) and the communication network (300), and each connection state by the sequential transmission means (401) And a connection determining means (402) for immediately releasing the connection that has become unconnectable and stopping the subsequent connection operation when one connection that has become connectable is detected. Multiple lines automatically generated Control system. 2. The multi-line automatic transmission according to claim 1, wherein the connection determining means (402) identifies whether or not each of the connections is possible by a signal sound returned from the communication network (300). control method. 3. The multiple line automatic transmission control system according to claim 1, wherein the communication device (400) is a private branch exchange. 4. The multiple line automatic call control system according to claim 1, wherein said communication device (400) is a simple exchange telephone device.