JPH11122364A - Terminal connection control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize home working of a recipient by installing a reception terminal to a home of the recipient in the terminal connection control system in a private branch of exchange. SOLUTION: Pluralities of reception terminals 300 are contained in a private branch of exchange 100 via a communication means 200 other than extensions, and the system is provided with a reception terminal state registration means 101 that registers a reception terminal state as to whether or not a reception terminal is able to receive a reception request call CR reaching the private branch of exchange and with a reception connection means 102 that selects a reception terminal registered to be a reception enable state among reception terminals registered in the reception terminal state registration means and connects a reception request call to the selected reception terminal when the reception request call reaches the private branch of exchange.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal connection control method in a private branch exchange, and more particularly, to a reception terminal accommodated by a communication means other than an extension directly accommodated in the private branch exchange to receive a reception request call arriving at the private branch exchange. The present invention relates to a terminal connection control method that is enabled.

[0002]

2. Description of the Related Art In recent years, telephone reception services such as provision of various kinds of information by telephone have become increasingly important for companies and others.

In a conventional private branch exchange, an incoming call (hereinafter referred to as an admission request call) expecting this kind of service is provided.
The required number of reception terminals are accommodated as extensions and installed in the telephone reception center in the company, and a receptionist trained in advance as reception staff is placed at each reception terminal, and the reception terminal sends The private branch exchange directly receives and manages the state of the reception terminal by transmitting a special number or operating the function button attached to the reception terminal, and when the reception request call arrives at the private branch exchange, the private reception exchange calls the current reception request call. The reception request call is distributed and received in a predetermined order to the reception terminal in the reception enabled state, and the reception terminal responds to the reception request.

[0004]

As is apparent from the above description, in a conventional private branch exchange, a reception terminal for realizing a telephone reception service is accommodated as an extension of the private branch exchange, and a receptionist is arranged. Incoming reception request calls are distributed to reception terminals that are in a reception-enabled state to respond to receptionists.

[0005] However, this type of receptionist requires long-term education and training before a satisfactory response to the reception request call can be made, and is a job relatively suitable for women. For this reason, the number of years of service has been limited due to marriage and childcare, and it has become impossible to secure the required number of trainees and work at a telephone reception center in the company.

[0006] If the receptionist can work from home,
Although a great deal of profit arises in securing human resources, in a conventional private branch exchange, a reception terminal installed outside the private branch office is housed in a private branch exchange via a public network or a private network, and is similar to that housed in an extension. Since it was impossible to perform state management, working at home of the receptionist was not feasible.

An object of the present invention is to enable a reception terminal to be installed in a receptionist's home, thereby enabling the receptionist to work at home.

[0008]

FIG. 1 is a diagram illustrating the principle of the present invention. In FIG. 1, reference numeral 100 denotes a private branch exchange, 200 denotes communication means other than an extension, 300 denotes a reception terminal, and CR _denotes a reception request call arriving at the private branch exchange (100).

Reference numeral 101 denotes a private branch exchange (10) according to the present invention.
0) is a receiving terminal state registration means. 102
Is a reception connection means provided in the private branch exchange (100) according to the present invention.

The private branch exchange (100) accommodates a plurality of reception terminals (300) via communication means (200) other than an extension. Reception terminal status registration means (101), the reception terminal (300) registers the whether the reception terminal state whether the reception ready acceptance request call (C _R) to arrive at the private branch exchange (100).

[0011] The reception connecting means (102) is a private branch exchange.
At (100), an admission request call (C_R) Arrives,
Reception terminal (3) registered in the attached terminal status registration means (101).
00), the reception terminal (3
00) and select the receiving terminal (300)
Acceptance request call (C_R). [The present invention (claim
Item 1) Related] Note that the receiving terminal state registration means (101) is configured to accept the receiving terminal (3
00) is a communication means (2) capable of transmitting an analog signal.
00) via the private branch exchange (100)
In this case, the reception terminal (300) sets up the communication means (200).
Via a voice channel within a specified communication path.
Considering receiving and registering the reception terminal status reached
You. [As above, the present invention (claim 2) relates] The reception terminal state registration means (101) is configured to
00) is a comprehensive service day as a communication means (200).
Private branch exchange (100) via digital network (ISDN)
If you are accommodated in a general service from the reception terminal (300)
Control channel set in the service digital network (ISDN)
Included in the control message transmitted via the file (Dch)
Accepted terminal status is received by the user / user information element
・ Registration is considered. [The present invention (claim
3) Related] In addition, the reception terminal state registration unit (101) is configured to
00) is a comprehensive service day as a communication means (200).
Private branch exchange (100) via digital network (ISDN)
If you are accommodated in a general service from the reception terminal (300)
Control channel set in the service digital network (ISDN)
Receiving end by the packet transmitted via the
It is considered that the terminal status is received and registered. [End of the book
Invention (Claim 4)] In addition, the reception terminal status registration means (101) is provided with the reception terminal (3).
00) via ISDN as communication means (200)
Reception terminal when housed in the private branch exchange (100)
(300) to Integrated Services Digital Network (ISDN)
Is transmitted via the information channel (Bch) set to
Receiving and registering the reception terminal status with a packet
Be considered. [The above is related to the present invention (claim 5)] In addition, the reception terminal status registration means (101) performs
When registering a private branch exchange, the reception terminal (300) and the private branch exchange (1)
00) via communication means (200).
Connection, and as a result, the reception connection means (102)
Acceptance request call (C _R) Arrived at the private branch exchange (100)
In the case, the selected reception terminal (300) and the private branch exchange
Acceptance request call for the connection held between (100)
(C_R) Is considered. 〔that's all,
The present invention (Claim 6)] Further, the reception terminal status registration means (101) is configured to receive the reception terminal status.
When registering a private branch exchange, the reception terminal (300) and the private branch exchange (1)
00) via communication means (200).
Once released, and as a result, receiving connection means (102)
Is a reception request call (C_RArrives at private branch exchange (100)
The private branch exchange (100) and the communication means (2)
00) via the selected reception terminal (300).
Attached request call (C_R) Is considered.
[As above, the present invention (claim 7)]
Register and manage the status of the receiving terminal
Since the reception request call to be received can be received by the reception terminal,
Receptionist working from home is feasible, securing human resources for receptionists
Is significantly easier.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a diagram showing a private branch exchange according to an embodiment of the present invention (claims 1 and 2), FIG. 3 is a diagram exemplifying the receptionist information database in FIG. 2, and FIG. 4 is a status code database in FIG. FIG. 5 is a diagram illustrating the status management table in FIG. 2, FIG. 6 is a diagram illustrating the receiver status registration process in FIG. 2, and FIG. 7 is a reception request call in FIG. FIG. 8 is a diagram illustrating a connection process, and FIG. 8 is a diagram illustrating a private branch exchange according to an embodiment of the present invention (claims 1, 3 to 5).
Is the reception status registration sequence in FIG. 8 (Claim 3)
FIG. 10 is a diagram exemplifying a receiver status registration sequence (claim 4) in FIG.
FIG. 1 is a diagram exemplifying a receiver status registration sequence (claim 5) in FIG. The same reference numerals indicate the same objects throughout the drawings.

First, an embodiment of the present invention (claims 1 and 2) will be described with reference to FIGS. In FIG. 2, the private branch exchange (1) is shown as the private branch exchange (100) in FIG. 1, and the communication means (20) in FIG.
0), a public network that is accommodated via the analog public line (3 _A) (4) is shown, also the reception terminal as the reception terminal (300) in FIG. 1 (RT) (5) is shown, further The line (2) is shown as the arrival source of the reception request call (C _R ).

[0014] accommodated in the reception terminal (RT) (5) is installed in the home each receptionist (6), the public network (4) and analog station line (3 _A) via the private branch exchange (1) Is done.

The office line (2) and the analog office line (3 _A ) are both accommodated in the public network (4).
The telephone number (DN ₂ ) given to the office line ( ₂ ) is used for receiving an acceptance request call (C _R ) from a general subscriber (not shown) of the public network (4). (3
_A ), the telephone number (DN _3A ) given to the reception terminal (R
T) Used as a telephone number for receiving a call from (5).

The private branch exchange (1) is connected to a network (N
W) (11), connection control unit (CPU) (12), storage unit (MEM) (13), management workstation (MC)
L) (14), central office trunk (COT) (15), which is an analog station line trunk (COT _A) (16 _A) and the PB signal receiver (PBR) (17), the connection control unit (CPU In (12), a reception terminal state registration unit (121) and a reception request call connection unit (122) are provided, and in a storage unit (MEM) (13), a receptionist information database (DB _RT ). (131), a status code database (DB _ST ) (132) and a status management table (TBL) (133) are provided.

The receiving terminal status registration unit (121) and the status management table (TBL) (133) play the role of the receiving terminal status registration means (101) in FIG. 1, and the reception request call connection unit (122) It plays the role of the reception connection means (102) in FIG.

Recipient information database (DB _RT ) (13)
1) has a configuration as shown in FIG. 3, and the status code database (DB _ST ) (132) has a configuration as shown in FIG. 4, for example, a management workstation (MCL) (14). It is configured by an input operation from.

Recipient information database (DB _RT ) (13)
In 1), each recipient (6) [each individual recipient (6) is (6)
_X ) (where X represents A, B, C, D, etc.), the receiver identifier (ID) assigned to the receiver (6) and the receiver (6) belong to Reception group (G) [Each reception group (G) is referred to as (G _Y ) (where Y indicates 1, 2, etc.)], the name of the recipient (OP) and the telephone assigned from the public network (4) The number (DN) is registered.

[0020] In Figure 3, for example, corresponds to the receptionist (6 _A), reception identifier (ID _A) have been granted, belong to acceptance group (G _1), receptionist name (OP _A), a public The telephone number (DN _A ) given from the network (4) is stored.

A status code database (DB _ST )
In (132), a status code (CD) for identifying each status of each receiver (6) is registered. In FIG.
The status code (CD ₁ ) indicates that the recipient (6) is in a receivable state, and the status code (CD ₂ ) is the recipient (6).
Has finished responding to one reception request call (C _R ), and is executing post-processing such as organizing and storing information related to the reception request call (C _R ), and the status code (CD)
₃ ) indicates that the receptionist (6) is currently leaving the reception terminal (RT) (5), and similarly, the status code (C)
D _n ) is a state management table (TBL) (13) described later.
Indicates that registration deletion is requested from 3).

The state of the receptionist (6) is determined by the reception terminal (R
T) (5), it is considered that the state of the receiver (6) and the state of both the receiver (6) and the reception terminal (RT) (5) will be described hereinafter.

First, the state registration processing of the receiver (6)
This will be described with reference to FIG. In the private branch exchange (1),
The acceptor information database ( _DBRT ) (131) and the status code database ( _DBST ) (132) in the storage unit (MEM) (13) are registered by an input operation from the management workstation (MCL) (14). (FIG. 6, step S11).

In this state, an arbitrary receptionist (6) [for example, the receptionist (6 _A )] operates the reception terminal (RT) (5) at home.
Seated at _A), after a call to the reception terminal (RT) (PSTN from 5 _A) (4), by dialing a phone number (DN _3A) granted to the analog public line (3 _A), a public net (4) is connected call reception terminal (RT) to (5 _a) to an analog public line (3 _a).

[0025] In the private branch exchange (1), the connection control unit (CPU) (12) is the incoming connection to the analog public line (3 _A), an analog station line trunk (COT _A) (16 _A)
Upon detection via, it determined to have come from the receiving terminal (RT) (5) [Step S12], response state analog station line trunk (COT _A) a (16 _A) to the analog public line (3 _A) And the reception terminal status registration unit (12
Start 1).

The started receiving terminal status registration unit (121)
After connecting to the network (NW) to control (11), an analog station trunk that detected the incoming (COT _A) (16 _A) a PB signal receiver (PBR) (17), PB
Signal receiver (PBR) (17) controls the, to generate a tone prompting delivery of acceptance identifier (ID), the network (NW) (11), an analog station line trunk (COT _A)
(16 _A ), analog office line (3 _A ) and public network (4)
Via to be returned to the call reception terminal (RT) (5 _A).

The receptionist (6 _A), when listening via a private branch exchange (1) analog station line return the signal tone from (3 _A) and the public network (4) communication path that is set in, reception terminal (RT) by operating the numeric buttons provided (5 _a), when performing operations for requesting registration of the receptionist identifier assigned to the self (ID _a), the reception terminal (RT) (5
_A ) transmits the input acceptor identifier (ID _A ) by a push-button dial signal [hereinafter referred to as a PB signal], and passes through a communication path in a public network (4) and an analog office line (3 _A ). To the private branch exchange (1).

In the private branch exchange (1), a PB signal receiver (PBR) (17) converts a PB signal arriving from an analog office line (3 _A ) into an analog office trunk (CO).
T _A ) (16 _A ) and network (NW) (11)
, And transmits the acceptor identifier (ID _A ) to the accepting terminal status registration unit (121) [Step S1]
3].

Upon receiving the acceptor identifier (ID _A ) transmitted from the PB signal receiver (PBR) (17), the accepting terminal status registering unit (121) stores (MEM) (13)
Referring to accept information database of the inner (DB _RT) (131), acceptance identifier (ID _A) to analyze the presence or absence of registration in the reception information database (DB _RT) (131) [step S14].

As a result of the analysis, if the receiver identifier (ID _A ) has not been registered in the receiver information database (DB _RT ) (131), it is determined that the caller is not an authorized telephone receptionist, and the PB signal Controls the receiver (PBR) (17) to generate a tone indicating registration rejection, and
(11), an analog station line trunk (COT _A) (1
6 _A), is sent back to the analog public line (3 _A) and the public network (4) call reception terminal via (RT) (5 _A) [Step S15].

As a result of the analysis, the receiver identifier (ID _A )
Is registered in the callee information database (DB _RT ) (131), it is determined that the caller is a legitimate telephone receptionist, and then the state management table (MEM) (13) in the storage unit (MEM) (13) With reference to (TBL) (133), it is analyzed whether the reception receiver identifier (ID _A ) is registered in the state management table (TBL) (133) [Step S16].

The results of the analysis, if accepted identifier (ID _A) is not registered in the state management table (TBL) (133), acceptance identifier (ID _A) of the state management table (TB
L) (133), and subsequently, the recipient identifier (ID _A ) in the recipient information database (DB _RT ) (131).
Registered information corresponding to the information, that is, the reception group (G ₁ ) to which the user belongs, the name of the reception person (OP _A ), and the telephone number (DN _A )
Is extracted and stored in an area corresponding to the receiver identifier (ID _A ) registered in the state management table (TBL) (133) [Step S17].

As a result of the analysis, the receiver identifier (ID _A )
Is registered in the state management table (TBL) (133), without executing the registration processing in step S17.
Move to the next process.

Subsequently, the reception terminal status registration unit (121)
By controlling the PB signal receiver (PBR) (17),
Besshi (ID_A) Registration confirmation signal (ACK)
A signal tone is generated, and the network (NW) (11)
Nalog Office Trunk (COT _A) (16_A),analog
Office line (3_A) And the call receiving end via the public network (4)
End (RT) (5_A) [Step S18].

The receptionist (6_A) Is from the private branch exchange (1)
Returned recipient identifier (ID_A) Registration confirmation signal (A
CK) and the signal tone specified by the analog office line (3_A) And
And listen via the communication path set in the public network (4)
Then, the reception terminal (RT) (5 _ANumber buttons provided in)
Operating state to indicate its own state (ie, ready state).
State code (CD₁) Is transmitted by a PB signal,
Channel (4) and analog line (3)_A) Via
To the private branch exchange (1).

[0036] In the private branch exchange (1), PB signal receiver (PBR) (17) is an analog station line (3 _A) analog station line PB signal arriving from the trunk (COT _A)
(16 _A) and network (NW) (11) receives and analyzed via, for transmitting a status code (CD ₁₎ to the reception terminal status registry (121) [step S19].

The receiving terminal status registering unit (121) stores the status code (CD ₁ ) transmitted from the PB signal receiver (PBR) (17) in the status management table (TBL) (133).
Is stored in the area corresponding to the acceptor identifier (ID _A ) registered in, and the registration of the status code (CD ₁ ) is completed [step S1A].

In step S16, the receiver identifier (I) is stored in the state management table (TBL) (133).
D _A ) has been registered and the status code (CD) has been registered in the corresponding area, the registered status code (C
D) is updated with the status code (CD ₁ ) received this time.

Subsequently, the reception terminal status registration unit (121)
A PB signal receiver (PBR) (17) is controlled to generate a signal tone defined as a status code (CD ₁ ) registration acknowledgment signal (ACK), and a network (NW) (11) and an analog central office trunk ( COT _a) (16 _a), is returned to the calling reception terminal via the analog public line (3 _a) and the public network (4) (RT) (5 a) [step S1B].

When the registration processing of the call receiving party (6 _A ) [that is, the call receiving terminal (RT) (5 _A )] is completed, the reception terminal state registration unit (121) sets the private branch exchange (1) to any of registered reception terminal (RT) (5 _a) of the retention type [invention embodiments (claims 6)] as a standby format embodiment of the present invention (claim 7)] and Psycho format adopted and either depending on which either holds the connection to the reception terminal (RT) (5 _a) and the private branch exchange (1), or to perform any of or be released.

First, when the private branch exchange (1) adopts the holding format as the standby format [Step S1C], the accepting terminal status registration unit (121) sets the network (NW).
(11) to control the incoming analog office trunk (COT).
_A) (16 _A) and the PB signal receiver (with to release the connection between PBR) (17), an analog station line trunk (C
OT _A) a (16 _A), placed by setting the state to continue to maintain an association with the call reception terminal (RT) (5 _A) to the analog public line (3 _A) [Step S1D].

The call receiving terminal (RT) (5 _A ) is connected to the analog station of the private branch exchange (1) via the communication path set in the public network (4) and the analog office line (3 _A ). continue a call (off-hook) state to hold a call path to the line trunk (COT _a) (16 _a), and waits for incoming connection admission request call (C _R) arriving from station line (2) Shall be.

In the meantime, a call charge is charged from the public network (4). If a general call charge is adopted, the call charge is reduced by the receiving terminal (RT) which is the caller.
Although the be charged for (5 _A), if the incoming to the analog public line trunk (COT _A) (16 _A) is adopted the reverse charging, call charge will be charged to the called PBX (1) and Become.

When the private branch exchange (1) adopts the recalling format as the standby format (step S1C), the accepting terminal status registration unit (121) sets the network (NW).
(11) to control the incoming analog office trunk (COT).
_A) (16 _A) and the PB signal receiver (with to release the connection between PBR) (17), an analog station line trunk (C
OT _A ) (16 _A ) is set to a state in which the connection with the call receiving terminal (RT) (5 _A ) is also released to the analog office line (3 _A ) (step S1E).

Thereafter, the private branch exchange (1) recalls the registered reception terminal (RT) (5 _A ) when the reception request call (C _R ) arrives from the central office line (2), and receives the reception request call. (C _R )
To make an incoming connection.

The call receiving terminal (RT) (5 _A ) is connected to the analog station of the private branch exchange (1) via a communication path set in the public network (4) and an analog office line (3 _A ). proceeds to call end (hook) state to release the call path to the line trunk (COT _a) (16 _a), a new incoming connections central office line admission request call arriving from (2) (C _R) Wait as an incoming call.

After the connection between the call receiving terminal (RT) (5 _A ) and the private branch exchange (1) is released, the public network (4)
Does not charge a call fee, the call receiving terminal (RT) (5 _A ) is stored in the state management table (TBL) (1
Call charges during the registration to 33), as in the embodiment of the present invention described above (claim 6), also charging employ outgoing charged on the reception terminal (RT) (5 _A), incoming It is also possible to charge the private branch exchange (1) by using charging.

The state management table (TB) shown in FIG.
L) The (133), in addition to receptionist the receptionist (6 _A) (6
_B ) to ( _6D ) have been registered in the same process as the recipient ( _6A ).

Note that the receptionist identifier (ID) of the receptionist (6 _B )
_The status code (CD ₂ ), that is, post-processing is registered in correspondence with _B ), and the receiver identifier (I) of the receiver (6 _C ) is registered.
Although the status code (CD ₃ ), ie, away from the seat, is registered in correspondence with D _C ), it is estimated that the status code (CD ₁ ), ie, the status code (CD ₁ ), that is, the status has changed, has been updated and registered.

The receiving terminal status registration unit (121) stores the status code (C) in the status management table (TBL) (133).
D ₁₎ the registered of the receptionist (6 _A) and the receptionist (6 _D)
, A connection priority (P) is set according to a predetermined criterion (for example, registration order).

In FIG. 5, the first connection priority (P ₁ ) corresponds to the acceptor identifier (ID _A ) of the acceptor (6 _A ).
Is set, and the second connection priority (P ₂ ) is set corresponding to the receiver identifier (ID _D ) of the receiver (6 _D ).

Next, the connection processing of the reception request call will be described with reference to FIG. In the private branch exchange (1), a state management table (TBL) in the storage unit (MEM) (13)
(133), the state of such receptionist shown in FIG. 5 (6 _A) to (6 _D) and registered.

In FIG. 5, the status code (CD ₂ ) is being registered, that is, the reception terminal (RT) (5 _B ) and the status code (CD ₃ ) which are being processed by the receiver (6 _B ) are registered. During,
That is, the reception terminal (RT) in which the reception person (6 _C ) is away from the desk
( _5C ) means that the reception request call ( _CR ) cannot be received,
The status code (CD ₁ ) is being registered, that is, the reception terminals (RT) (5 _A ) and (5 _D ) in the receivable state are waiting for the reception request call (C _R ) (FIG. 7, step S 21). .

In this state, when an acceptance request call (C _R ) from a subscriber of the public network (4) (not shown) arrives at the station line (2), the connection control unit (CPU) (12) sets the station line. (2) the incoming call to, central office trunk (COT) (15) to detect through, it is determined that the accepted request call (C _R) has arrived [step S22], central office trunk (COT) (15) Is set to a response state for the office line (2), and the admission request call connection unit (122) is activated.

The activated reception request call connection unit (122)
Refers to the state management table (TBL) (133) in the storage unit (MEM) (13), and refers to the state code (CD ₁ ).
Is registered, that is, the receiver identifier (ID
_A ) and (ID _D ), the first connection priority (P
₁₎ is accepted identifier in setting (ID _A), i.e., the reception terminal (RT) (5 _A), and selected as the reception terminal for incoming reception request call in arrival _{(C R) (RT) (} 5) [step S23], executes the incoming connections selected by the reception terminal (RT) admission request call to (5 _a) (C _R) [step S24].

The actual incoming connection processing is performed by the reception terminal (R
T) (slightly depending standby state 5 _A) differ. First, when the standby format reception terminal (RT) (5 _A) is a holding form, via the reception terminal during state registration (RT) PSTN from (5 _A) (4) and analog station line (3 _A) Since the communication path set by the call is being held, the reception request call connection unit (12
2) controls the network (NW) (11), and the central office trunk (COT) (1) from which the admission request call (C _R ) arrives.
5), only sets the speech path between the reception terminal (RT) (5 _A) analog station line in holding the connection from the trunk _{(COT A) (16 A)} , immediately accepted requested call (C _R )
There will be the incoming connection to the reception terminal (RT) (5 _A), receptionist (6 _A) is immediately available answering to the caller of the reception request call (C _R).

On the other hand, the reception terminal (RT) (5)_A) Standby type
If the formula is a recall format, the receiving terminal
(RT) (5_A) And the private branch exchange (1)
Since the call path has been released, the reception request call connection unit (12
2) is a free analog line trunk (COT)_A)
(16_A) Is selected and captured, and the analog office line (3_A) To
After the call is set to the calling state, the state management table (TB
L) (133) to the recipient identifier (ID)_ACorresponding to
Stored reception terminal (RT) (5_A) Phone number (D
N _A) To extract the analog office trunk (COT)_A)
(16_A) To analog office line (3_A) Via public network
(4), the reception terminal (RT) (5)
_A) Is called again and the reception terminal (RT) (5)_A) Responds
The analog office line trunk (COT)_A) (1
6_A) And reception terminal (RT) (5_A) And analog
Office line (3_A) And a communication path via the public network (4) are established.
After that, the network (NW) (11) is controlled,
Acceptance request call (C_R) Arrives at the office trunk (COT)
(15) and the reception terminal (RT) (5_A) And connected ana
Log Office Line Trunk (COT_A) (16_ACall between
By setting the route, the reception request call (C_R) Is the reception end
End (RT) (5_A) Is connected
Person (6_A) Is the reception request call (C_R) Is available for callers
Become.

Therefore, when the standby format of the receiving terminal (RT) (5 _A ) is the holding format, the receiving terminal (RT) (5A)
Than when the waiting format (5 _A) is a re-call format, it shortens the response time is much for admission requested call (C _R), is excellent serviceability for the caller's acceptance request call (C _R) ing.

Next, an embodiment of the present invention (claims 1 and 3) will be described with reference to FIGS. Also in FIG.
The private branch exchange (1) is shown as the private branch exchange (100) in FIG. 1 as in FIG. 2, but the communication means (200) in FIG. 1 is different from that in FIG. A public network (4) having the function of ISDN) and an I network accommodated in the public network (4).
SDN office line (3 _I ) is shown.

The telephone number (3 _I ) assigned to the receiving office line (2) of the reception request call (C _R ) is also applied to the ISDN office line (3 I), similarly to the analog office line (3 _A ) in FIG. D
A different telephone number (DN _3I ) from the reception terminal (RT) (5), which is different from N ₂ ).

[0061] The private branch exchange (1), ISDN central office trunk to accommodate the ISDN central office line (3 _I) (COT _I)
(16 _I ) is converted to the analog office trunk (C
OT _A ) (16 _A ) instead of a PB signal receiver (PBR) (17), and a reception terminal state registration provided in the connection control unit (CPU) (12) Unit (121) and the reception request call connection unit (122)
As in FIG. 2, the processing procedure shown in FIG. 6 and FIG. 7 is executed, and the receiving terminal state registration means (101) and the receiving connection means (102) in FIG. 1 respectively.
The communication with the reception terminal (RT) (5) is different from the communication procedure of the analog office line (3 _A ) in FIG. 2 and is different from the communication procedure of the analog service line (3 _A ) in FIG. 9 through FIG. ISDN).

A control channel (D) is provided between the private branch exchange (1) and the public network (4) via an ISDN office line (3 _I ).
ch) has been set, and a control channel (Dch) is set between each reception terminal (RT) (5) and the public network (4) via a subscriber line (not shown). Shall be

On the other hand, a receiver information database (DB _RT ) (13) provided in the storage (MEM) (13)
1), the status code database (DB _ST ) (132) and the status management table (TBL) (133) have the configurations shown in FIGS. 3, 4 and 5, respectively, as in FIG. It is also constituted by an input operation from the management workstation (MCL) (14).

First, the state registration processing of the receiver (6) will be described with reference to FIGS. In the private branch exchange (1), the receptionist information database (DB _RT ) (131) and the status code database (DB _ST ) (132) in the storage unit (MEM) (13) are stored in the management workstation (MCL) ( It is registered by the input operation from 14) [FIG. 6, step S11].

In this state, an arbitrary receptionist (6) [for example, the receptionist (6 _A )] operates the reception terminal (RT) (5) at home.
Seated at _A), the receiving terminal (RT) (5 _A) the number buttons other to the operation, which is provided to, ISDN central office line (3 _I) to grant telephone number (DN _3I) and the called party number, self When the operation for requesting the registration of the acceptor identifier (ID _A ) assigned to the user is executed, the accepting terminal (RT) (5 _A ) uses the telephone number (DN _3I ) as a number information element and the _acceptor identifier (ID) call were added _a) as user-user information (U-U · I) setting message (SETUP) (assembled ID _a), the public network via a control channel (Dch) (4)
To the public network (4), the control channel (Dch)
The call reception terminal via (RT) (5 _A), sends back a call setup acceptance message (CALL PROC), via the control channel of the ISDN central office line (3 _I) (Dch) private branch exchange ( 1) includes user / user information (U-
U.I) call setup message (SETUP) (I
D _A ).

[0066] In a private branch exchange (1), the connection control unit (CPU) (12) is a user-user information from the ISDN central office line _{(3 I) (U-U} · I) with a call setup message (SETUP) ( When the arrival of ID _A ) is detected via the ISDN central office trunk (COT _I ) (16 _I ), it is determined that an incoming call has been received from the reception terminal (RT) (5) [Step S
12], ISDN central office trunk (COT _I ) (16 _I )
And control channel (Dc) of ISDN office line (3 _I )
A call setup acceptance message (CALL PROC) is returned to the public network (4) via h), and the acceptance terminal status registration unit (121) is activated.

The started receiving terminal status registration unit (121)
Analyzes the received call setup message (SETUP) (ID _A ) with user / user information (UUI) and identifies a receiver identifier (UUI) added as user / user information (UUI). ID _A ) is extracted [Step S1
3], refers to the storage unit (MEM) (13) Reception information database in (DB _RT) (131), acceptance identifier (ID _A) is accepted information database (DB _RT) (13
In 1), the presence or absence of registration is analyzed [step S14].

As a result of the analysis, if the acceptor identifier (ID _A ) is not registered in the acceptor information database (DB _RT ) (131), it is determined that the caller is not an authorized telephone receptionist, and Disconnect message (DISC) with a registration rejection signal (NAK) added as user information (UUI)
And ISDN office line trunk (COT _I ) (1
6 _I) controls, when the back to the control channel of the ISDN central office line (3 _I) (PSTN via Dch) (4), the public network (4), the user-user information (U-U- I) with a disconnect message (DISC) (a NAK), and returns to the calling reception terminal (RT) (5 _a) via the control channel (Dch) [step S15].

As a result of the analysis, the receiver identifier (ID _A )
Is registered in the callee information database (DB _RT ) (131), it is determined that the caller is a legitimate telephone receptionist, and then the state management table (MEM) (13) in the storage unit (MEM) (13) With reference to (TBL) (133), it is analyzed whether the reception receiver identifier (ID _A ) is registered in the state management table (TBL) (133) [Step S16].

[0070] As a result of the analysis, if accepted identifier (ID _A) is not registered in the state management table (TBL) (133), acceptance identifier (ID _A) of the state management table (TB
L) (133), and subsequently, the recipient identifier (ID _A ) in the recipient information database (DB _RT ) (131).
Registered information corresponding to the information, that is, the reception group (G ₁ ) to which the user belongs, the name of the reception person (OP _A ), and the telephone number (DN _A )
Is extracted and stored in an area corresponding to the receiver identifier (ID _A ) registered in the state management table (TBL) (133) [Step S17].

As a result of the analysis, the receiver identifier (ID _A )
Is registered in the state management table (TBL) (133), without executing the registration processing in step S17.
Move to the next process.

Subsequently, the reception terminal status registration unit (121)
Disconnect message (DISC) (A) to which a registration confirmation signal (ACK) is added as user / user information (UUI)
CK) assemble and ISDN office line trunk (COT _I )
(16 _I ) is controlled and returned to the public network (4) via the control channel (Dch) of the ISDN office line (3 _I ).
Public network (4), the user-user information (U-U-I) with disconnection message (DISC) to (ACK), via a control channel (Dch) call reception terminal (RT) (5 _A)
[Step S18].

The reception terminal (RT) (5 _A ) receives the user / user information (U−U.U.) Returned from the private branch exchange (1).
Analyze I) with disconnection message (DISC), when extracting the user-user information (U-U-I) appended to have registration confirmation signal as (ACK), and displays the receptionist (6 _A).

The receptionist (6_A) Is from the private branch exchange (1)
Confirm that the registration confirmation signal (ACK) has been returned
And the reception terminal (RT) (5_A) Number buttons
Operate the others to show your own status (that is, acceptable status).
Status code (CD₁Perform an operation that requires registration
Then, the reception terminal (RT) (5_A) Indicates the status code (CD
₁) As user / user information (UUI)
Release Message (REL) (CD₁Assembly and control
Transmit to public network (4) via channel (Dch)
And the public network (4)_I) Control cha
To the private branch exchange (1) via the channel (Dch).
Release message (RE) with user information (UUI)
L) (CD₁Transfer).

In the private branch exchange (1), a reception terminal status registration unit (121) in the connection control unit (CPU) (12)
But the user-user information from the ISDN central office line _{(3 I) (U-U} · I) with release message (REL) (C
D ₁ ) arrives at the ISDN central office trunk (COT _I )
Upon detection via (16 _I ), the release message (REL) with the received user / user information (UUI) is received.
(CD ₁ ) is analyzed and user / user information (U-U.
When the status code (CD ₁ ) added as I) is extracted [Step S19], the status management table (TB) is extracted.
L) Register in the area corresponding to the recipient identifier (ID _A ) registered in (133) [Step S1A].

In step S16, the receiver identifier (I) is stored in the state management table (TBL) (133).
D _A ) has been registered and the status code (CD) has been registered in the corresponding area, the registered status code (C
D) is updated with the status code (CD ₁ ) received this time.

Subsequently, the reception terminal status registration unit (121)
Release completion message (RELC) to which a registration confirmation signal (ACK) is added as user / user information (UUI)
When the OMP) (ACK) is assembled, the ISDN central office trunk (COT _I ) (16 _I ) is controlled and returned to the public network (4) via the control channel (Dch) of the ISDN central office (3 _I ). , The public network (4) releases a release completion message (REL) with user / user information (UUI).
The COMP) (ACK), and returns to the calling reception terminal (RT) (5 _A) via the control channel (Dch) [step S1B].

The reception terminal (RT) (5 _A ) receives the user / user information (U−U · U) returned from the private branch exchange (1).
I) Release complete message (REL COMP) (A)
CK) to analyze and extract the user-user information (U-U · I) added to it and registration confirmation signal as (ACK), and displays the receptionist (6 _A).

Upon confirming that the private branch exchange (1) has returned the registration acknowledgment signal (ACK), the receptionist (6 _A ) confirms that his / her own status code (CD ₁ ), that is, the receivable state has been registered. And waits for the reception of the reception request call ( _CR ).

[0080] While registration of call reception party (6 _A) is completed at least, during which reception terminal (RT) (5 _A) and the public network (4), and the public network (4) and the private branch exchange (1 ), Only various control messages are transmitted and received via the control channel (Dch), and no call is set between the reception terminal (RT) (5 _A ) and the private branch exchange (1). .

[0081] Accordingly, the waiting form of registered reception terminal in an embodiment of the present invention (claim _{1,3) (RT) (5 A} ) is receptionist (6 _A) is again the reception terminal (RT) (5 _A )
From not established and become by holding format again call format unless executes a call setting process to the private branch exchange (1), hereafter PBX (1), the station line (2) admission request call from (C _R) There when you arrive, and recall the registered reception terminal (RT) (5 _a), it is accepted as a new incoming connections.

[0082] Accordingly, the foregoing receptionist (6 _A), i.e. to the state registration process from the receiving terminal (RT) (5 _A), never call charge is charged from the public network (4). next,
The connection process of the reception request call will be described with reference to FIG.

In the private branch exchange (1), the storage unit (M
EM) (13) state management table (TBL) (13)
3), the receptionist such as shown in FIG. 5 (6 _A) to (6
The state of _D ) is registered.

In FIG. 5, the status code (CD ₂ ) is being registered, that is, the reception terminal (RT) (5 _B ) and the status code (CD ₃ ) which are being processed by the receiver (6 _B ) are registered. During,
That is, the reception terminal (RT) in which the reception person (6 _C ) is away from the desk
( _5C ) means that the reception request call ( _CR ) cannot be received,
The status code (CD ₁ ) is being registered, that is, the reception terminals (RT) (5 _A ) and (5 _D ) in the receivable state are waiting for the reception request call (C _R ) (FIG. 7, step S 21). .

In this state, when an acceptance request call (C _R ) from a subscriber of the public network (4) (not shown) arrives at the station line (2), the connection control unit (CPU) (12) sets the (2) the incoming call to, central office trunk (COT) (15) to detect through, it is determined that the accepted request call (C _R) has arrived [step S22], central office trunk (COT) (15) Is set to a response state for the office line (2), and the admission request call connection unit (122) is activated.

The activated admission request call connection unit (122)
Refers to the state management table (TBL) (133) in the storage unit (MEM) (13), and refers to the state code (CD ₁ ).
Is registered, that is, the receiver identifier (ID
_A ) and (ID _D ), the first connection priority (P
₁₎ is accepted identifier in setting (ID _A), i.e., the reception terminal (RT) (5 _A), and selected as the reception terminal for incoming reception request call in arrival _{(C R) (RT) (} 5) [step S23], executes the incoming connections selected by the reception terminal (RT) admission request call to (5 _a) (C _R) [step S24].

In the embodiment of the present invention (claims 1 and 3), the waiting mode of the receiving terminal (RT) (5 _A ) is a re-calling type as described above, so that the receiving request call connection unit ( 122) is an integrated service digital network (ISDN)
After performing the call setting process between the ISDN office line (3 _I ) and the selection receiving terminal (RT) (5 _A ) based on the call setting procedure in ( ₁ ), the network (NW) (11) is controlled and the reception request is made. Central office trunk (COT) where the call (C _R ) arrived
(15) and the call set-up terminal I (RT) (5 _A )
By setting the speech path between the SDN central office trunk _{(COT I) (16 I)} , will be accepted request call (C _R) is incoming connection to the reception terminal (RT) (5 _A), accepted person (6 _a) becomes possible answering to the caller of the reception request call (C _R).

Next, an embodiment of the present invention (claims 1 and 4)
This will be described with reference to FIGS. 3 to 8 and FIG. Departure
Private branch exchange in the embodiment of the present invention (claims 1 and 4)
(1) is an embodiment of the present invention (claims 1 and 3).
Is different from the private branch exchange (1) in that the reception terminal (R
T) (5_A) Requests the private branch exchange (1) to register.
Attached person identifier (ID _A) And status code (CD_A)That
Other information necessary for state registration of the reception terminal (RT) (5)
Of the present invention (claims 1 and 3).
In the embodiment, via a control channel (Dch)
User information is included in the various call control messages
The present invention (U-U.I)
In an embodiment of the present invention, the control channel
(D-channel) [so-called D-channel
Packet).

Therefore, the reception terminal (RT) (5) and the reception terminal status registration unit (121) provided in the connection control unit (CPU) (12) in the private branch exchange (1) are connected to the receptionist (6), That is, it has a function capable of exchanging various information necessary for state registration of the reception terminal (RT) (5) by a D-channel packet.

The other points are the same as in the embodiment of the present invention (claims 1 and 3). First, the receptionist (6)
Will be described with reference to FIGS. 6 and 10.

In the private branch exchange (1), the storage unit (M
EM) (13) Recipient information database (DB _RT )
(131) and status code database (DB _ST )
(132) is the management workstation (MCL)
Registered by the input operation from (14) [FIG. 6, step S11].

[0092] In this state, any receptionist (6) [e.g. receptionist (6 _A)] is, the reception terminal in the home (RT) (5
Seated at _A), the other to the operation receiving terminal (RT) (numeric buttons provided on the 5 _A), the receiving terminal (RT) (5 _A)
A public network (4), and when performing operations for executing "call control link set" process between the public network and (4) private branch exchange (1), from the reception terminal (RT) (5 _A) By transmitting a SABME frame to the public network (4) and returning a UA frame from the public network (4),
Via reception terminal (RT) "call control link set" process between the (5 _A) and the public network (4) is performed, also ISDN central office line (3 _I), private from public network (4) A UI frame is transmitted to the exchange (1), a SABME frame is transmitted from the private branch exchange (1) to the public network (4), and a UA frame is returned from the public network (4) to the private branch exchange (1). As a result, a "call control link setting" process is executed between the public network (4) and the private branch exchange (1).

Subsequently, the private branch exchange (1) and the public network (4) execute "Dch packet selection" processing.
Via the control channel of the ISDN central office line (3 _I) (Dch), and transmits a response message (CONN) from the private branch exchange (1) to the public network (4), the private branch exchange from the public network (4) (1) And a response confirmation message (CONN ACK)
The private branch exchange (1) returns a release message (REL) to the public network (4).
COM), a “Dch packet selection” process is executed between the private branch exchange (1) and the public network (4).

Subsequently, the public network (4) and the private branch exchange (1) execute the "Dch link setting" process,
SABME from the public network (4) to the private branch exchange (1) via the SDN office line (3 _I ) [control channel (Dch)].
A frame is transmitted, and a private branch exchange (1) is transmitted from the public network (4).
, The "Dch link setting" process is executed between the public network (4) and the private branch exchange (1).

Subsequently, the private branch exchange (1) and the public network (4) execute "call control link release" processing.
Via the ISDN office line (3 _I ) [control channel (Dch)], the private branch exchange (1) sends the DIS to the public network (4).
By transmitting a C frame and returning a UA frame from the public network (4) to the private branch exchange (1), a "call control link release" process is executed between the public network (4) and the private branch exchange (1). Is done.

The [0096] above, "call control link" is set between the reception terminal (RT) (5 _A) and the public network (4),
"Dch" is provided between the public network (4) and the private branch exchange (1).
Link ”is the control channel (Dc) of the ISDN office line (3 _I ).
h).

On the other hand, the reception terminal (RT) (5 _A ) sets “Dch packet selection”, “Dch link setting” and “call control link release” between the public network (4) and the private branch exchange (1). that the process is complete run, when detected by unexpected illustrated procedure, receptionist (6 _a), the reception terminal (RT) (5
Operating the other numeric buttons provided on the _A), between the reception terminal (RT) (5 _A) and private branch exchange (1), the various information for registering the state of the receptionist (6 _A), When you perform an operation that requires a set of packet call for exchanging the D channel packet, the reception terminal (RT) (5 _a) are assembled private branch exchange (1) call request packet addressed (CR),
_A transmission is made to the public network (4) via the "Dch link" that has been set between the reception terminal (RT) (5A) and the public network (4).

The public network (4) is a reception terminal (RT)
The call request packet received from (5 _A) (CR) assembling an incoming call packet (CN), ISDN office line (3 _I)
Via the control channel (Dch) to the private branch exchange (1) via the "Dch link" established between the public network (4) and the private branch exchange (1).

In the private branch exchange (1), the connection control unit (CPU) (12) notifies the arrival of the call request packet (CR) from the ISDN office line (3 _I ) by using the ISDN office line trunk (COT _I ). When (16 _I) is detected via a start reception terminal status registry (the 121).

The started receiving terminal status registration unit (121)
Analyzes the call request packet received (CR), when determining that an incoming call from the receiving terminal (RT) (5 _A) [Step S12], assemble the incoming call reception packet (CA), IS
Control the DN line trunk (COT _I ) (16 _I )
"D already-set between SDN office-line (3 _I) PSTN via control channel (Dch) of (4) private branch exchange (1)
A call reception packet (CA) is returned to the public network (4) via the "ch link".

The public network (4) assembles a connection completion packet (CC) based on the received call acceptance packet (CA),
Via the "Dch link" in the already set between the reception terminal (RT) (5 _A), and transmits it to the reception terminal (RT) (5 _A).

The reception terminal (RT) (5)_A))
Attachment (6_A) Is the reception terminal (RT) (5)_A)
Use the number buttons and other
Attached person identifier (ID_A) Perform an operation that requires registration
And the reception terminal (RT) (5_A) Is the entered recipient knowledge
Besshi (ID_A), The data packet (DT) (I
D _A) Is assembled, and “Dch” already set up with the public network (4).
When sent to the public network (4) via the "link", the public network
(4) ISDN office line (3_I) Control channel (Dc
h) via the private branch exchange (1)
The received data is sent to the private branch exchange (1) via the "h link".
Data packet (DT) (ID_ATransfer).

In the private branch exchange (1), a reception terminal status registration unit (121) in the connection control unit (CPU) (12)
Is the data packet (D) from the ISDN office line (3 _I ).
T) The arrival of (ID _A ) is acknowledged by the ISDN central office trunk (CO
When T _I) (16 _I) is detected via, to analyze the received data packet (DT) (ID _A), when extracting a reception identifier (ID _A) [Step S13] The storage unit (MEM) (13 ) Receptionist information database (DB)
_With reference to ( _RT ) (131), it is analyzed whether the acceptor identifier (ID _A ) is registered in the _acceptor information database (DB _RT ) (131) [Step S14].

As a result of the analysis, if the acceptor identifier (ID _A ) is not registered in the acceptor information database (DB _RT ) (131), it is determined that the caller is not an authorized telephone receptionist, and registration is rejected. A data packet (DT) (NAK) (not shown) is assembled by a signal (NAK) to control the ISDN central office trunk (COT _I ) (16 _I ) and via the control channel (Dch) of the ISDN central office (3 _I ). When the data is returned to the public network (4) via the "Dch link" that has been set up with the public network (4), the public network (4) converts the received data packet (DT) (NAK). , Reception terminal (RT)
Via the "Dch link" setting of already between the (5 _A) to return to the calling reception terminal (RT) (5 _A) [step S1
5].

As a result of the analysis, the receiver identifier (ID _A )
Is registered in the callee information database (DB _RT ) (131), it is determined that the caller is a legitimate telephone receptionist, and then the state management table (MEM) (13) in the storage unit (MEM) (13) With reference to (TBL) (133), it is analyzed whether the reception receiver identifier (ID _A ) is registered in the state management table (TBL) (133) [Step S16].

[0106] As a result of the analysis, if accepted identifier (ID _A) is not registered in the state management table (TBL) (133), acceptance identifier (ID _A) of the state management table (TB
L) (133), and subsequently, the recipient identifier (ID _A ) in the recipient information database (DB _RT ) (131).
Registered information corresponding to the information, that is, the reception group (G ₁ ) to which the user belongs, the name of the reception person (OP _A ), and the telephone number (DN _A )
Is extracted and stored in an area corresponding to the receiver identifier (ID _A ) registered in the state management table (TBL) (133) [Step S17].

As a result of the analysis, the receiver identifier (ID _A )
Is registered in the state management table (TBL) (133), without executing the registration processing in step S17.
Move to the next process.

Subsequently, the reception terminal status registration unit (121)
Data packet (DT) by registration confirmation signal (ACK)
(ACK) and ISDN office line trunk (CO
T _I) (16 _I) to control the public network via "Dch links" of setting end between the control channel of the ISDN central office line (3 _I) (PSTN via Dch) (4) (4), the public network (4) receives the data packet (D
T) (ACK) to the call receiving terminal (R) via the “Dch link” that has been set up with the receiving terminal (RT) (5 _A ).
T) (return to 5 _A) [Step S18].

The reception terminal (RT) (5 _A ) transmits the data packet (DT) (AC) returned from the private branch exchange (1).
K) and extract the registration confirmation signal (ACK),
It is displayed to the receptionist ( _6A ).

[0110] receptionist (6 _A) confirms that the registration confirmation signal from the private branch exchange (1) (ACK) is returned, the reception terminal (RT) (5 _A) numeric buttons provided on other operations Then, when an operation for requesting registration of a status code (CD ₁ ) indicating its own status [that is, a receivable status] is executed, the reception terminal (RT) (5 _A ) responds to the input status code (CD ₁ ). Data packet (DT) (C
D ₁ ) and assembling “Dch” with the public network (4).
When transmitted to the public network (4) via the link ", the public network (4), the control channel of the ISDN central office line (3 _I) (Dc
h) via the private branch exchange (1)
The received data packet (DT) (CD ₁ ) is transferred to the private branch exchange (1) via the “h link”.

In the private branch exchange (1), a reception terminal status registration unit (121) in the connection control unit (CPU) (12)
Is the data packet (D) from the ISDN office line (3 _I ).
T) The arrival of (CD ₁ ) is acknowledged by the ISDN central office trunk (CO
T _I ) (16 _I ), the received data packet (DT) (CD ₁ ) is analyzed and the status code (C
D ₁ ) [Step S19], the receiver identifier (I) registered in the state management table (TBL) (133) is extracted.
The data is registered in the area corresponding to D _A ) [step S1A].

In step S16, the receiver identifier (I) is stored in the state management table (TBL) (133).
D _A ) has been registered and the status code (CD) has been registered in the corresponding area, the registered status code (C
D) is updated with the status code (CD ₁ ) received this time.

Subsequently, the reception terminal status registration unit (121)
Data packet (DT) by registration confirmation signal (ACK)
(ACK) and ISDN office line trunk (CO
T _I) (16 _I) to control the public network via "Dch links" of setting end between the control channel of the ISDN central office line (3 _I) (PSTN via Dch) (4) (4), the public network (4) receives the data packet (D
T) (ACK) to the call receiving terminal (R) via the “Dch link” that has been set up with the receiving terminal (RT) (5 _A ).
T) (return to 5 _A) [Step S1B].

The receiving terminal (RT) (5 _A ) transmits the data packet (DT) (AC) returned from the private branch exchange (1).
K) and extract the registration confirmation signal (ACK),
It is displayed to the receptionist ( _6A ).

Receptionist (6_A) Is from the private branch exchange (1)
Confirm that the registration confirmation signal (ACK) has been returned
And its own status code (CD₁), That is, the acceptable state is
Confirm that registration has been completed, and check the reception terminal (RT) (5_A)
Operate the number buttons and others provided at the reception terminal (R
T) (5_A) And the private branch exchange (1).
_A), That is, the reception terminal (RT) (5_ARegister the status of)
Release the packet call that has been set up to send and receive various information
When the requested operation is performed, the reception terminal (RT) (5)_A)
Assembles a recovery request packet (CQ),
T) (5_A) And the public network (4).
Via the link "to the public network (4).

The public network (4) has a reception terminal (RT)
The recovery request packet received from (5 _A) (CQ) assembling the disconnection instruction packet (CI), ISDN office line (3
_I ) is transmitted to the private branch exchange (1) via the "Dch link" set up with the private branch exchange (1) via the control channel (Dch).

In the private branch exchange (1), the connection control unit
(CPU) Receiving terminal status registration unit (121) in (12)
Is the ISDN office line (3_I) Disconnection instruction packet (C
I) arrives at the ISDN central office trunk (COT)_I) (1
6_I), The disconnection confirmation packet (CF)
And ISDN office trunk (COT_I) (1
6 _I) To control the ISDN office line (3_I) Control channel
(Dch) to the public network (4)
Return to the public network (4) via the "ch link"
The public network (4) converts the received disconnection confirmation packet (CF) into
Reception terminal (RT) (5_A) And "Dch Lin
Call receiving terminal (RT) (5)_ASend back to
You.

When receiving the disconnection confirmation packet (CF) returned from the private branch exchange (1), the reception terminal (RT) (5 _A ) determines that the reception unit (6) has received the disconnection confirmation packet (CF).
_A ).

[0119] receptionist (6 _A) confirms that the disconnection confirmation from the private branch exchange (1) the packet (CF) is returned, the reception terminal (RT) (5 _A) numeric buttons provided on other operations Then, when an operation for requesting release of the set “Dch link” between the reception terminal (RT) (5 _A ) and the private branch exchange (1) is executed, the reception terminal (RT) (5 _A ) assembling the frame, when transmitted to the public network (4) via the "Dch links" of setting end between the public network (4), the public network (4), the control channel of the ISDN central office line (3 _I) The received DISC frame is transmitted to the private branch exchange (1) via the “Dch link” that has been set up with the private branch exchange (1) via (Dch).

In the private branch exchange (1), the connection control unit (CPU) (12) transmits a D signal from the ISDN office line (3 _I ).
The arrival of the ISC frame is indicated by the ISDN central office trunk (CO
T _I) (when 16 _I) detected via the assembles the UA frame, ISDN central office trunk (COT _I) (16 _I)
And control channel (Dc) of ISDN office line (3 _I )
When the public network (4) is returned to the public network (4) via the “Dch link” already set up with the public network (4) via the h), the public network (4) accepts the received UA frame. Terminal (RT)
Returned to (5 _A) and call reception terminal via the "Dch link" in the already set between the (RT) (5 _A).

In the above process, the reception terminal (RT)
The set “Dch link” between (5 _A ) and the private branch exchange (1) is released. Thereafter receptionist (6 _A), i.e. the receiving terminal (RT) (5 _A) waits for incoming reception request call (C _R).

The registration process of the call acceptor (6 _A ) is completed as described above. During that time, the accepting terminal (RT) (5 _A ) and the public network (4), and the public network (4) and the private branch exchange (1) ), A “call control link” and a “Dch link” are respectively set, and only a call for transferring a D-channel packet via the control channel (Dch) is set, and the reception terminal (RT) ( 5 _a) and are not set calls that occupy the communication channel [information channels of the ISDN central office line (3 _I) (Bch)] between the PBX (1).

Therefore, in the standby mode of the registered reception terminal (RT) (5 _A ) in the embodiment of the present invention (claims 1 and 4), the reception person (6 _A ) renews the reception terminal (RT) (5 _A ). )
From not established and become by holding format again call format unless executes a call setting process to the private branch exchange (1), hereafter PBX (1), the station line (2) admission request call from (C _R) There when you arrive, and recall the registered reception terminal (RT) (5 _a), it is accepted as a new incoming connections.

However, the fee for the D-channel packet communication executed in the status registration process from the receiver (6 _A ) will be charged. Subsequent connection processing of the reception request call is the same as that in the above-described embodiment of the present invention (claims 1 and 3), and thus the description is omitted.

Next, embodiments of the present invention (claims 1 and 5)
This will be described with reference to FIGS. 3 to 8 and FIG. Departure
Private branch exchange in the embodiment of the present invention (claims 1 and 5)
(1) is an embodiment of the present invention (claims 1 and 4).
Is different from the private branch exchange (1) in that the reception terminal (R
T) (5_A) Requests the private branch exchange (1) to register.
Attached person identifier (ID _A) And status code (CD_A)That
Other information necessary for state registration of the reception terminal (RT) (5)
Of the present invention (claims 1 and 4).
In the embodiment, via a control channel (Dch)
Although it was transferred as a D channel packet to be transferred
On the other hand, in the embodiment of the present invention (claims 1 and 5),
Packets transferred via information channel (Bch)
To transfer using a so-called B channel packet
You.

Therefore, the reception terminal (RT) (5) and the reception terminal status registration unit (121) provided in the connection control unit (CPU) (12) in the private branch exchange (1) are used by the reception terminal (6). It has a function to send and receive various information required for status registration by B channel packet.

The other points are the same as in the embodiment of the present invention (claims 1 and 4). First, the receptionist (6)
Will be described with reference to FIG. FIG. 1
1 shows a process of collecting the status of the recipient (6) from the private branch exchange (1), which is different from the above embodiments.

In the private branch exchange (1), the storage unit (M
EM) (13) Recipient information database (DB _RT )
(131) and status code database (DB _ST )
(132) is the management workstation (MCL)
Registered by the input operation from (14).

In this state, the private branch exchange (1) transmits the SABME frame to the public network (4), and the public network (4) returns the UA frame. The “call control link setting” process is executed between the process (4).

Subsequently, the reception terminal status registration unit (121) provided in the connection control unit (CPU) (12) in the private branch exchange (1) calls the reception terminal (RT) (5 _A ). assembling a call setup message (SETUP) for setting, and controls the ISDN central office trunk _{(COT I) (16 I)} , the public network via a control channel of the ISDN central office line (3 _I) (Dch) ( 4) When it is transmitted, the public network (4)
Sends a call setup acceptance message (C) to the private branch exchange (1) via the control channel (Dch) of the ISDN office line (3 _I ).
ALL PROC) and the receiving terminal (R
T) Transmit a UI frame to (5 _A ).

Receiving terminal (RT) that has received the UI frame
(5 _A) transmits a SABME frame to the public network (4), UA from the PSTN (4) to the reception terminal (RT) (5 _A)
By frame is sent back, "call control link set" process between the public network (4) and the reception terminal (RT) (5 _A) is performed, together reception transmitted from the private branch exchange (1) terminal (RT) (5 _a) destined for the call setup message (SE
TUP), shall be delivered to the reception terminal (RT) (5 _A).

[0132] reception terminal (RT) (5 _A) is, at the stage of receiving the call setup message (SETUP) from the private branch exchange (1), receptionist (6 _A) are seated, in a state responsive Yes, when a response message (CONN) is assembled and transmitted to the public network (4) via the set “call control link”, the public network (4) receives the message from the reception terminal (RT) (5 _A ). The response message (CONN) is transferred to the private branch exchange (1) via the control channel (Dch) of the ISDN office line (3 _I ).

In the private branch exchange (1), a reception terminal status registration unit (121) in the connection control unit (CPU) (12)
Sends the response message (CONN) arriving from the ISDN office line (3 _I ) to the ISDN office line trunk (COT _I ).
(16 _I ) and a response confirmation message (CO
NN ACK) and ISDN central office trunk (CO
T _I) (16 _I) to control and is returned to the public network (4) via the control channel of the ISDN central office line (3 _I) (Dch), the public network (4), private branch exchange (1) A response acknowledgment message (CONN ACK) received from the receiving terminal (RT) (5 _A ) via the set “call control link”
Return to.

As described above, the private branch exchange (1) and the reception terminal
(RT) (5_A) And ISDN office line (3_I) And
And a call is set up via the public network (4) and the ISDN office line
(3 _I) And the information channel (Bch) of the public network (4)
A call path is set via the terminal.

Next, the reception terminal status registration unit (121) establishes a packet communication link between the reception terminal (RT) (5 _A ) and the established communication path [information channel (Bch)]. To set, assemble SABME frame, ISD
Control the N office trunk (COT _I ) (16 _I )
The communication path set to the DN line (3 _I ) [information channel (B
ch)] to the public network (4), the public network (4) assembles a UA frame and sets a communication path (information channel (Bch)) on the ISDN office line (3 _I ).
To the private branch exchange (1) via
Assembled ME frame, and sends it to the reception terminal (RT) via the reception terminal the speech path already set [information channel (Bch)] between _{(5 A) (RT) (} 5 A).

When receiving the SABME frame from the public network (4) via the set communication path [information channel (Bch)], the receiving terminal (RT) (5 _A ) assembles the UA frame and sets the UA frame. Call path [information channel (Bch)]
To the public network (4).

The [0137] above, ISDN office line (3 _I) and the public network (4) via the private branch exchange (1) and the reception terminal (RT) (5 _A) speech path already set between the [information channel (Bch)], a packet communication link is set.

Next, the receiving terminal status registration unit (121)
Between the reception terminal (RT) (5 _A) and the private branch exchange (1), various information required to collect the state of the receptionist (6 _A), via a packet communications link already set exchange Terminal (RT) (5)
_A ) Assemble a call request packet (CR) destined for ISDN
Controls the central office trunk (COT _I ) (16 _I )
The transmission is made to the public network (4) via the packet communication link set on the N station line (3 _I ).

The public network (4) assembles the incoming call packet (CN) based on the call request packet (CR) received from the private branch exchange (1), and sets it up with the receiving terminal (RT) (5 _A ). Reception terminal (R) via the packet communication link of
T) Transfer to (5 _A ).

Upon receiving the incoming call packet (CN) from the public network (4), the receiving terminal (RT) (5 _A ) assembles the incoming call receiving packet (CA) and sets it up with the public network (4). Public network (4) via the established packet communication link
Return to.

The public network (4) assembles a connection completion packet (CC) based on the received call acceptance packet (CA),
The packet is returned to the private branch exchange (1) via the packet communication link set on the ISDN office line (3 _I ).

In the private branch exchange (1), a reception terminal status registration unit (121) in the connection control unit (CPU) (12)
Sends the connection completion packet (CC) arriving from the ISDN office line (3 _I ) to the ISDN office line trunk (COT _I ) (1
When 6 _I) is detected via a reception terminal (RT) (5 _A)
A data packet (DT) (Q) is transmitted by a receiver identifier request signal (QID) that requests the receiver to transmit a receiver identifier (ID).
ID), ISDN office line trunk (COT _I )
(16 _I ) is controlled and returned to the public network (4) via the already established packet communication link on the ISDN office line (3 _I ), and the public network (4) is transmitted from the private branch exchange (1). The received data packet (DT) (QID) is transmitted to the reception terminal (R
T) (5 _A ) and to the receiving terminal (RT) (5 _A ) via the established packet communication link.

The reception terminal (RT) (5 _A ) receives the data packet (DT) (QID) received from the public network (4).
Analyzes and extracts the receptionist identifier request signal (QID), and displays the receptionist (6 _A).

The receiver (6 _A ) recognizes the receiver identifier request signal (QID) transmitted from the private branch exchange (1),
Reception terminal (RT) number buttons provided on the (5 _A) other the operation, receptionist identifier assigned to the self (ID
_A ) When the operation for requesting registration is executed, the reception terminal (R
T) (5 _A ) assembles a data packet (DT) (ID _A ) based on the input recipient identifier (ID _A ), and transmits the packet packet to the public network (4) via the established packet communication link. To the public network (4).

The public network (4) transmits the data packet received from the reception terminal (RT) (5 _A ) to the private branch exchange (1) via the packet communication link set on the ISDN office line (3 _I ). (DT) (ID _A ) is transferred.

In the private branch exchange (1), a reception terminal status registration unit (121) in the connection control unit (CPU) (12)
Is the data packet (D) from the ISDN office line (3 _I ).
T) The arrival of (ID _A ) is acknowledged by the ISDN central office trunk (CO
When T _I) (16 _I) is detected via, to analyze the received data packet (DT) (ID _A), when extracting a reception identifier (ID _A), accepted in the storage unit (MEM) (13) user information refers to the database (DB _RT) (131), acceptance identifier (ID _a) to analyze the presence of storage in the reception information database (DB _RT) (131).

As a result of the analysis, if the receiver identifier (ID _A ) has not been registered in the receiver information database (DB _RT ) (131), it is determined that the receiver (6) is not a legitimate telephone receptionist. A data packet (DT) (NAK) (not shown) is assembled by the registration reject signal (NAK) to control the ISDN central office trunk (COT _I ) (16 _I ), and the packet communication set to the ISDN central office (3 _I ) The public network (4) returns the received data packet (DT) (NAK) to the receiving terminal (R)
Via a packet communication link already set between T) (5 _A) returns to the reception terminal (RT) (5 _A).

As a result of the analysis, the receiver identifier (ID _A )
Is registered in the receiver information database (DB _RT ) (131), it is determined that the receiver (6) is a legitimate telephone receptionist, and then state management in the storage unit (MEM) (13) is performed. Referring to the table (TBL) (133), the reception receiver identifier (ID _A ) is stored in the state management table (TBL) (13).
3) Analyze the presence or absence of registration.

As a result of the analysis, if the receiver identifier (ID _A ) has not been registered in the state management table (TBL) (133), the receiver identifier (ID _A ) is stored in the state management table (TB).
L) (133), and subsequently, the recipient identifier (ID _A ) in the recipient information database (DB _RT ) (131).
Registered information corresponding to the information, that is, the reception group (G ₁ ) to which the user belongs, the name of the reception person (OP _A ), and the telephone number (DN _A )
Is extracted and stored in an area corresponding to the receiver identifier (ID _A ) registered in the state management table (TBL) (133).

As a result of the analysis, the receiver identifier (ID _A )
There if already registered in the state management table (TBL) (133), without performing the receptionist identifier (ID _A) related registration process described above, proceeds to the next processing.

Subsequently, the reception terminal status registration unit (121)
Data packet (DT) by registration confirmation signal (ACK)
(ACK) and ISDN office line trunk (CO
Data T _I) controls (16 _I), when the back to the public network (4) via the packet communication link already set to ISDN office line (3 _I), the public network (4) is received packet (DT) (ACK), and returns to the reception terminal (RT) (5 _a) and the reception terminal via the packet communication link already set during the (RT) (5 _a).

The receiving terminal (RT) (5 _A ) transmits the data packet (DT) (AC) returned from the private branch exchange (1).
K) and extract the registration confirmation signal (ACK),
It is displayed to the receptionist ( _6A ).

[0153] receptionist (6 _A) confirms that the registration confirmation signal from the private branch exchange (1) (ACK) is returned, the reception terminal (RT) (5 _A) numeric buttons provided on other operations Then, when an operation for requesting registration of a status code (CD ₁ ) indicating its own status [that is, a receivable status] is executed, the reception terminal (RT) (5 _A ) responds to the input status code (CD ₁ ). Data packet (DT) (C
D ₁ ) is assembled and transmitted to the public network (4) via the established packet communication link with the public network (4).

The public network (4) sends a reception terminal (RT) (5 _A ) to the private branch exchange (1) via a communication path [information channel (Bch)] set on the ISDN office line (3 _I ). Is transferred from the data packet (DT) (CD ₁ ).

In the private branch exchange (1), a reception terminal status registration unit (121) in the connection control unit (CPU) (12)
Is the data packet (D) from the ISDN office line (3 _I ).
T) The arrival of (CD ₁ ) is acknowledged by the ISDN central office trunk (CO
T _I ) (16 _I ), the received data packet (DT) (CD ₁ ) is analyzed and the status code (C
D ₁ ), the state management table (TBL) (1
33) Register in the area corresponding to the receiver identifier (ID _A ) registered.

In the above process, the status management table (T
BL) (133), if the acceptor identifier (ID _A ) is registered and the status code (CD) is registered in the corresponding area, the registered status code (CD) is received this time. The status code (CD ₁ ) is updated.

Subsequently, the reception terminal status registration unit (121)
Data packet (DT) by registration confirmation signal (ACK)
(ACK) and ISDN office line trunk (CO
Data T _I) controls (16 _I), when the back to the public network (4) via the packet communication link already set to ISDN office line (3 _I), the public network (4) is received packet (DT) (ACK), and returns to the reception terminal (RT) (5 _a) and the reception terminal via the packet communication link already set during the (RT) (5 _a).

The accepting terminal (RT) (5 _A ) transmits the data packet (DT) (AC) returned from the private branch exchange (1).
K) and extract the registration confirmation signal (ACK),
It is displayed to the receptionist ( _6A ).

Upon confirming that the private branch exchange (1) has returned the registration acknowledgment signal (ACK), the receptionist (6 _A ) confirms that its own status code (CD ₁ ), that is, the receivable state has been registered. Check.

Subsequently, the reception terminal status registration unit (121)
Between the private branch exchange (1) and the reception terminal (RT) (5 _A), in order to release the packet call already set in order to transmit and receive various information for registering the state of the receptionist (6 _A) , Assemble the recovery request packet (CQ), and
OT _I ) (16 _I ) is controlled and transmitted to the public network (4) via the communication path [information channel (Bch)] set on the ISDN office line (3 _I ). Assembles a disconnection instruction packet (CI) using the recovery request packet (CQ) received from the private branch exchange (1), and
Via a packet communication link already set between (5 _A) transmits to the reception terminal (RT) (5 _A).

When receiving the disconnection instruction packet (CI) transmitted from the public network (4), the reception terminal (RT) (5 _A ) assembles a disconnection confirmation packet (CF) and establishes a connection with the public network (4). When transmitted to the public network (4) via the packet communication link already set in, the public network (4), disconnection confirmation packet received from the reception terminal (RT) (5 _a) (C
F) is transferred to the private branch exchange (1) via the packet communication link set on the ISDN office line (3 _I ).

In the private branch exchange (1), a reception terminal status registration unit (121) in the connection control unit (CPU) (12)
Is a disconnection confirmation packet (C) from the ISDN office line (3 _I ).
F) arrives at the ISDN central office trunk (COT _I ) (1
When 6 _I) is detected via a reception terminal (RT) (5 _A)
Confirm that the release of the set packet call has been completed.

Subsequently, the reception terminal status registration unit (121)
To execute the process of releasing the reception terminal (RT) (5 _A) packet communication link already set between assembles the DISC frame, ISDN central office trunk (COT _I) (1
6 _I) controls, when the transmitted to the public network (4) via the speech path already set to ISDN office line (3 _I) [information channel (Bch)], the public network (4), UA frame Is assembled and returned to the private branch exchange (1) via the communication path (information channel (Bch)) already set up on the ISDN office line (3 _I ), and a DISC frame is assembled and the reception terminal (R
T) (5 via the communication path setting completion [information channel (Bch)] between the _A) transmits to the reception terminal (RT) (5 _A).

When receiving the DISC frame from the public network (4) via the set communication path [information channel (Bch)], the receiving terminal (RT) (5 _A ) assembles the UA frame and sets the UA frame. The data is returned to the public network (4) via the communication path [information channel (Bch)].

As described above, the established packet communication link between the private branch exchange (1) and the receiving terminal (RT) (5 _A ) via the ISDN office line (3 _I ) and the public network (4). Is released.

[0166] In such a state, between the private branch exchange (1) and the reception terminal (RT) (5 _A) is still in the call is set, via the ISDN office line (3 _I) and the public network (4) Therefore, the communication channel [information channel (Bch)] is occupied.

Therefore, the receiving terminal status registration unit (121)
, Compared registered reception terminal (RT) (5 _A), the present invention both stand type shown in the embodiment of (claim 1), i.e., any retention type and psycho formats also can be employed as Become.

First, when the private branch exchange (1) adopts the holding format as the standby format, release the call being set between the private branch exchange (1) and the reception terminal (RT) (5 _A ). Instead, the occupied speech path (information channel (Bch)) is kept as it is via the ISDN office line (3 _I ) and the public network (4).

[0169] Note that reception terminal (RT) (5 _A), via a public network (4) and the ISDN central office line (3 _I), holding calls in the set between the private branch exchange (1) Therefore, without transmitting the disconnection message (DISC), the call setting state is continued, and the admission request call (C _R ) arriving from the central office (2).
Wait for an incoming connection.

In the meantime, a call charge is charged from the public network (4). However, if a general call charge is adopted, the call charge is charged to the private branch exchange (1) as the caller. The Rukoto.

When the private branch exchange (1) adopts the recall type as the standby type, the reception terminal state registration unit provided in the connection control unit (CPU) (12) in the private branch exchange (1) (121), the reception terminal (RT) (5 _a) and the cutting message for releasing a call in the set between (DIS
C) and assemble the ISDN central office trunk (COT _I ) (1)
6 _I) controls, when the transmitted via a control channel of the ISDN central office line (3 _I) (Dch) in the public network (4), the public network (4), the control of the ISDN central office line (3 _I) Channel (D
ch), a release message (REL) is returned to the private branch exchange (1), and a disconnection message (DIS
Assembled C), and transmits to the reception terminal (RT) (5 _A) via the "call control links" of setting end.

The receiving terminal (RT) (5 _A ) receiving the disconnection message (DISC) sets the “call control link”
A release message (REL) is returned to the public network (4) via the network.

In the private branch exchange (1), a reception terminal status registration unit (121) in the connection control unit (CPU) (12)
Sends a release message (REL) arriving from the ISDN line (3 _I ) to the ISDN line trunk (COT _I ) (1
_6I ), a release complete message (RE
L COMP) and ISDN central office trunk (CO
T _I) (16 _I) to control, is sent back to the public network (4) via the control channel of the ISDN central office line (3 _I) (Dch).

The public network (4) has a reception terminal (RT)
Upon receipt of the release message sent (REL) from (5 _A), back to the assembly a release complete message (REL COMP), the reception terminal via the "call control links" of setting end (RT) (5 _A) I do.

As described above, the call being set up between the private branch exchange (1) and the receiving terminal (RT) (5 _A ) is released. Further, the private branch exchange (1) sends a DIS to the public network (4).
When the C frame is transmitted and the UA frame is returned from the public network (4), a "call control link release" process is executed between the private branch exchange (1) and the public network (4),
Also, a DISC frame is transmitted from the public network (4) to the receiving terminal (RT) (5 _A ), and the receiving terminal (RT) (5
By UA frame is returned from the _A), "call control link release" process between the public network (4) and the reception terminal (RT) (5 _A) is executed.

Thereafter, the private branch exchange (1) recalls the registered reception terminal (RT) (5 _A ) when a reception request call (C _R ) arrives from the central office line (2), and receives a new incoming call. It is accepted as a connection, also receiving terminal (RT) (5 _a) waits for incoming connection acceptance request call arriving from station line (2) (C _R) as a new incoming call.

After the connection between the reception terminal (RT) (5 _A ) and the private branch exchange (1) is released, no call charge is charged from the public network (4). R
T) (5 _A ) in the state management table (TBL) (133)
Is charged to the private branch exchange (1).

The subsequent connection processing of the admission request call is the same as that of the above-described embodiments of the present invention (claims 1 and 2) or the present invention (claims 1 and 3), and therefore the description thereof is omitted.
As is apparent from the above description, according to the embodiment of the present invention, the state of the reception terminal (RT) (5) installed in the home of the receptionist (6) and accommodated in the public network (4) is as follows. In the private branch exchange (1), the status management table (TBL) (13
Registration managed to 3), station line (2) arrive admission requested call (C _R) can be wait on, and therefore a telecommuter of receptionist (6) can be realized.

FIGS. 2 to 11 are only one embodiment of the present invention. For example, the communication means (200) includes a public network (4) and an analog office line (3 _A ) / ISDN office line (3).
_The present invention is not limited to the configuration according to _I ), and various other modifications such as another private branch exchange connected by a dedicated line are considered, but the effect of the present invention does not change in any case. . Further, the reception terminal (300) is not limited to the reception terminal (RT) (5) accommodated in the public network (4), but may be connected to another private branch exchange connected to the private branch exchange (1) by a dedicated line. Many other variations are considered, such as the extensions to be accommodated, but the effect of the invention remains the same in any case. Further, the in-band frequency signal transmitted from the reception terminal (RT) (5) to the private branch exchange (1) is not limited to the PB signal, and various other modifications such as an MF signal are considered. In this case, the effect of the present invention does not change. The admission request call (C _R ) is not limited to the call arriving from the local line (2), but arrives via a dedicated line accommodated in the private branch exchange (1) or the private branch exchange (1). Many other deformations are considered, such as originating from the extension housed in
In any case, the effect of the present invention does not change. Further, it goes without saying that the configuration of the private branch exchange (100) to which the present invention is applied is not limited to the private branch exchange (1) shown in the figure.

[0180]

As described above, according to the present invention, the private branch exchange registers and manages the state of the reception terminal accommodated via communication means other than the extension, and accepts the reception request call arriving at the private branch exchange by the reception terminal. As a result, the work of the receptionist at home can be realized, and securing the human resources of the receptionist is greatly facilitated.

[Brief description of the drawings]

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

FIG. 2 shows a private branch exchange according to an embodiment of the present invention (claims 1 and 2).

FIG. 3 is a receptionist information database in FIG. 2;

FIG. 4 is a status code database in FIG.

FIG. 5 is a state management table in FIG. 2;

FIG. 6 is a process for registering a receiver status in FIG. 2;

FIG. 7 is an admission request call connection process in FIG.

FIG. 8 shows a private branch exchange according to an embodiment of the present invention.

FIG. 9 is a sequence diagram for registering a receiver status in FIG. 8 (claim 3);

FIG. 10 is a sequence diagram of a receiver status registration sequence in FIG. 8 (claim 4);

FIG. 11 is a sequence diagram of a receiver status registration sequence in FIG.

[Explanation of symbols]

1,100 private branch exchange 2 office line 3 _A analog public line 3 _I ISDN office line 4 PSTN 5,300 reception terminal (RT) 6 receptionist 11 network (NW) 12 connecting the control unit (CPU) 13 storage section (MEM) 14 administrative workstations (MCL) 15 central office trunk (COT) 16 _A analog station line trunk (COT _A) 16 _I ISDN central office trunk (COT _I) 17 PB signal receiver (PBR) 101 reception terminal state registration unit 102 Receiving connection means 121 Receiving terminal status registration unit 122 Reception request call connection unit 131 Recipient information database (DB _RT ) 132 Status code database (DB _ST ) 133 State management table (TBL) 200 Communication means

Claims (7)

[Claims] A plurality of reception terminals are accommodated in a private branch exchange via communication means other than an extension, and whether or not the reception terminals are in a state capable of accepting a reception request call arriving at the private branch exchange. Reception terminal state registration means for registering the reception terminal state of, when the reception request call arrives at the private branch exchange, from among the reception terminals registered in the reception terminal state registration means,
A terminal connection control method, comprising: selecting a reception terminal registered in a receivable state, and providing reception connection means for connecting the reception request call to the selected reception terminal. 2. The receiving terminal status registering means, when the receiving terminal is accommodated in the private branch exchange via a communication means capable of transmitting an analog signal, is set from the receiving terminal to the communication means. 2. The terminal connection control method according to claim 1, wherein the reception terminal state transmitted and received by the in-voice frequency signal via the communication channel is received and registered. 3. The receiving terminal status registering means, when the receiving terminal is accommodated in the private branch exchange via an integrated service digital network as the communication means, from the receiving terminal to the integrated service digital network. 2. The terminal connection control method according to claim 1, wherein the reception terminal state is received and registered by a user / user information element included in a control message transmitted via a set control channel. 4. The accepting terminal status registering means, when the accepting terminal is accommodated in the private branch exchange via an integrated service digital network as the communication means, from the accepting terminal to the integrated service digital network. 2. The terminal connection control method according to claim 1, wherein the reception terminal state is received and registered by a packet transmitted via a set control channel. 5. The accepting terminal status registering means, when the accepting terminal is accommodated in the private branch exchange via an integrated service digital network as communication means, sets the accepted terminal to the integrated service digital network. 2. The terminal connection control method according to claim 1, wherein the reception terminal state is received and registered by a packet transmitted through the information channel. 6. The accepting terminal status registering means, when registering the accepting terminal status, retains a connection set between the accepting terminal and the private branch exchange via the communication means, The reception connection means, when the reception request call arrives at the private branch exchange, terminates the reception request call for the connection held between the selected reception terminal and the private branch exchange. The terminal connection control method according to claim 1, wherein 7. The accepting terminal state registering means, when registering the accepting terminal state, once releases a connection set between the accepting terminal and the private branch exchange via the communication means, The reception connection means, when the reception request call arrives at the private branch exchange, via the private branch exchange and the communication means, the received reception request call to the selected reception terminal, characterized in that the reception request call is connected. The terminal connection control method according to claim 1.