JPH07162528A - Transfer system in calling state of incoming call - Google Patents

Abstract

PURPOSE:To easily transfer an incoming call in calling to a subscriber other than a caller and a called subscriber to other subscriber with respect to the transfer system in calling state of incoming call in an exchange. CONSTITUTION:The system is provided with a calling state transfer means 101 that transfers a call for a called terminal equipment 2002 to a transfer destination terminal equipment 2004 when a terminal equipment 2003 other than a caller terminal equipment 2001 and the called terminal equipment 2002 executes the operation for transfer in calling state of incoming call for designating the called terminal equipment 2002 and a transfer destination terminal equipment 2004 while a call comes from the caller terminal equipment 2001 to the called terminal equipment 2002, a calling state transfer registration means 102 that registers the transfer destination terminal equipment 2004 as an absence transfer destination terminal equipment to the called terminal equipment 2002 and transfers the incoming call to the called terminal equipment 2002 to the absence transfer destination terminal equipment, and a transfer registration notice means 103 that displays the information representing the registration of absence transfer to the called terminal equipment 2002 to a display section 201 provided to the called terminal equipment 2002.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a call forwarding system during an incoming call in an exchange. As services provided by diversified exchanges, call forwarding (or automatic forwarding), in which an incoming call is once answered and then the incoming call is forwarded to another subscriber specified by the called subscriber, a forwarding destination when the subscriber is absent Various transfer services have been put into practical use, such as call forwarding, which automatically transfers an incoming call to a transfer destination subscriber by registering and placing the subscriber in advance.

[0002]

2. Description of the Related Art FIG. 4 is a diagram showing an example of a conventional exchange. The exchange (1) is a space division type network (NW) (11) for setting a communication path (p), and subscribers (2) [individual subscribers are referred to as (2 ₁ ) and (2 ₂ ), respectively. , And so on]. Subscriber circuit (SLC) (1
2) Generates various signal sounds such as dial tone, busy tone, ringing tone, etc., and the subscriber (2) through the network (NW) (11).
A signal tone transmission unit (TNS) (13) for transmitting to the subscriber (2) via the network (NW) (11) to generate a ringing signal, and a ringing signal transmission unit (RG) (14),
A PB signal receiving unit (PBR) (15) for receiving a push button dial signal [hereinafter referred to as a PB signal] sent from a subscriber (2), and a central controller (CC) (16) for controlling the entire exchange (1). ) And main memory (MM)
(17) is provided.

Each subscriber (2) accommodated in the exchange (1) has a display unit (DP), such as a multifunction telephone.
It is assumed that the terminal (MT) (21) including (22) is used.

Further, the central controller (CC) (16) has
The subscriber (2) is provided with a call forwarding control unit (161) that provides a call forwarding service and a proxy response control unit (162) that provides a proxy response service, and a main memory (MM) (17). In (), a transfer data table (171) used for the call forwarding service is provided.

For example, when the subscriber (2 ₂ ) leaves the desk, the absent transfer registration operation with the other subscriber (2 ₄ ) as the transfer destination is executed in advance so that the transfer data table (171) is displayed. is forwarding number based on the telephone number (DN _S) as a subscriber ₍₂ 2) (DN 2) is also a telephone number of the corresponding transfer destination telephone number (DN _D) as a subscriber (2 ₄₎ (DN ₄ )
Are registered respectively.

Thereafter, for example, when the subscriber (2 ₁ ) makes a call to the subscriber (2 ₂ ), the central control unit (CC)
(16) analyzes the state of the called subscriber (2 _2), when identifying the called subscriber (2 ₂₎ is in call forwarding registration, activates call forwarding control unit (161).

The absent transfer control unit (161) which has been activated,
Transfer data table (17) in main memory (MM) (17)
1), refer to the transfer source telephone number (DN_S) As incoming call
Entry (2₂) Phone number (DN₂) Is already registered
Search for the phone number (DN₂) Is registered
Then, the corresponding transfer destination telephone number (DN_DRegistered as)
Telephone number (DN_Four) To the subscriber (2₂) To
Make a call with a telephone number (DN _Four) Subscriber specified by
(2_Four) To.

As a result, the central controller (CC) (16)
Sets the communication paths (p ₁₁ ) and (p ₁₂ ) in the network (NW) (11), and the signal tone transmission unit (TNS) (1
3) the ringing tone generated by the subscriber circuit (SLC) (1
2 ₁ ) to the sending terminal (MT) (21 ₁ ),
Also, the call signal generated by the call signal transmission unit (RG) (14) is sent to the transfer destination terminal (MT) (21 ₄ ) via the subscriber circuit (SLC) (12 ₄ ), and the transfer destination subscriber (2) ₄ )
When the call is answered, the call path (p ₁₁ ) and (p ₁₂ ) set in the network (NW) (11) is released to set the call path (p ₁₃ ) and the call is transferred to the calling subscriber (2 ₁ ). Allows communication with the former subscriber (2 ₄ ).

When the subscriber (2 ₂ ) returns later and executes the operation for canceling the absent transfer registration, the subscriber (2 ₂ ) registered as the transfer source telephone number (DN _S ) in the transfer data table (171) is called. The telephone number (DN ₂ ) and the telephone number (DN ₄ ) registered as the corresponding transfer destination telephone number (DN _D ) are deregistered.

[0010] Incoming calls to the subsequent subscriber (2 _2), without being transferred to the subscriber (2 _4), coming into direct subscriber (2 _2). However, when the subscriber (2 ₂ ) forgets to execute the absence registration operation and leaves the seat, for example, when the subscriber (2 ₁ ) makes a call to the subscriber (2 ₂ ), the central controller (CC)
(16) analyzes the state of the called subscriber (2 _2), the terminating subscriber (2 ₂₎ to identify that it is a call forwarding unregistered, normal to the incoming process for the subscriber (2 ₂₎ Run and
The call paths (p ₁₁ ) and (p ₁₄ ) are set in the network (NW) (11), and the ringing signal transmitter (RG) (14)
Will continue to be sent to the receiving terminal (MT) (21 ₂ ).

In this state, the receiving terminal (MT) (2
1₂) Other subscribers (2 ₃) Is the terminal
(MT) (21₂) To call on behalf of the incoming call to
However, if you execute a predetermined proxy response operation,
The control device (CC) (16) operates the proxy response control unit (162).
Start up and set the communication in the network (NW) (11).
Story (p₁₁) And (p₁₄) To release the call path (p₁₅)
Set the terminal (MT) (21 ₂) Of the call signal
Sending is stopped and the calling subscriber (2₁) To subscribers (2
₃) Is a substitute response.

The substitute response subscriber (2 ₃ ) informs the calling subscriber (2 ₁ ) of the absence of the terminating subscriber (2 ₂ ), and recognizes a predetermined transfer destination subscriber (2 ₄ ). Then, the call transfer operation is performed by designating the transfer destination subscriber (2 ₄ ), thereby transferring the call from the calling subscriber (2 ₁ ) to the predetermined transfer destination subscriber (2 ₄ ).

[0013]

As is apparent from the above description, in the conventional exchange, even if the call forwarding service can be provided, the subscriber (2 ₂ ) forgets to execute the call forwarding registration operation. When the user leaves the desk, the incoming call to the subscriber (2 ₂ ) is not transferred to another subscriber (2) [for example, the subscriber (2 ₄ )], and the receiving terminal (MT)
The call signal is continuously transmitted to (21 ₂ ), which causes trouble to the vicinity of the calling subscriber (2 ₁ ) and the called terminal (MT) (21 ₂ ).

In order to solve such a problem, the exchange (1)
Even although is possible to provide a proxy response service, have found that if it is sufficient to call forwarding to the subscriber given subscriber an incoming call to (2 ₂₎ [for example subscriber (2 _4)], The proxy response subscriber (2 ₃ ) needs to respond to the calling subscriber (2 ₁ ) once by executing the proxy response operation, and then execute a predetermined call transfer operation. will be troubling the extra time and effort to 2 _3), it did not become a suitable solution.

An object of the present invention is to enable a subscriber other than the called subscriber to easily transfer the incoming call being called to another subscriber.

[0016]

FIG. 1 is a diagram showing the principle of the present invention. In FIG. 1, reference numeral 100 denotes an exchange which is a target of the present invention, 200 denotes a terminal accommodated in the exchange (100), and 201 denotes a display unit included in each terminal (200).

Reference numeral 101 is a mid-call transfer means provided in the exchange (100) according to the present invention [claims 1 to 3]. Reference numeral 102 denotes call forwarding registration means provided in the exchange (100) according to the present invention [claims 2 and 3].

Reference numeral 103 denotes transfer registration notifying means provided in the exchange (100) according to the present invention [claim 3].

[0019]

The transferring means (101) for calling is the calling terminal (20).
0₁) To the receiving terminal (200₂) To the incoming call to
Calling terminal (200₁) And the receiving terminal (200₂Other than)
Terminal (200₃) From the called terminal (20
0₂) And the receiving terminal (200 ₂) Incoming call to
Transfer destination terminal (200_Four) Incoming call transfer with and specified
When the specified operation is executed, the receiving terminal (20
0₂) Is transferred to the transfer destination terminal (200_Four) Transfer to
To do.

The call transfer registering means (102) is a transfer destination terminal (200 ₄ ) transferred by the call transferring means (101).
And registered as the call forwarding destination terminal to the incoming terminal (200 _2), an incoming call subsequent to the incoming terminal (200 _2), to the call forwarding destination terminal (200 _4), and can be transferred by call forwarding feature.

The transfer registration notification means (103), information indicating that the already registered the call forward against ringing transfer register means (102) receiving terminal (200 _2), the receiving terminal of the (200 ₂₎ It is displayed on the display unit (201) provided.

Therefore, according to the present invention (Claim 1), an incoming call to the called terminal is transferred from a terminal other than the calling terminal and the called terminal to the predetermined transfer destination terminal without replying to the calling terminal. According to the present invention (Claim 2), terminals other than the calling terminal and the called terminal can be
Incoming calls to the receiving terminal can be transferred to a specified transfer destination terminal, and the transfer destination terminal is registered for call forwarding to the call receiving terminal. After that, incoming calls to the call receiving terminal are automatically transferred to call forwarding destination terminals. According to the present invention (Claim 3), terminals other than the calling terminal and the called terminal can transfer an incoming call to the called terminal to a predetermined transfer destination terminal, and The transfer destination terminal is registered for absent transfer, and it can be displayed on the receiving terminal that the absent transfer registration has been completed, which greatly improves the convenience of the exchange.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 2 is a diagram showing an exchange according to an embodiment of the present invention, and FIG. 3 is a diagram showing an example of a transfer process in FIG. The same reference numerals denote the same objects throughout the drawings.

In FIG. 2, the exchange (1
00) is an exchange (1), and the terminal (200) in FIG. 1 is a terminal (MT) (21) having a display unit (DP) (22). As (101), the call transfer control unit (16
3) is provided in the central control device (CC) (16), and the in-call transfer registration unit (164) as the in-call transfer registration means (102) in FIG. 1 has a central controller (CC) (1).
6), a transfer data table (171) is provided in the main memory (MM) (17), and a transfer registration notifying unit (165) is provided at the center as transfer registration notifying means (103) in FIG. The display data transmission unit (DDT) (1
8) is connected to the network (NW) (11).

In FIGS. 2 and 3, the subscriber (2 ₂ )
Suppose that he forgot to execute the absence transfer registration operation and left his seat. When the subscriber (2 ₁ ) makes a call to the subscriber (2 ₂ ) in this state [step S1 in FIG. 3], the central controller (CC) (16) changes the state of the called subscriber (2 ₂ ). When it is analyzed and it is identified that the called subscriber (2 ₂ ) is not registered for call forwarding (step S2), the call path (p ₁ ) and (p ₂ ) are set in the network (NW) (11) by a known procedure. ) Is set, and the ringing signal generated by the ringing signal transmitting unit (RG) (14) is sent to the receiving terminal (MT) (21) via the communication path (p ₂ ) and the subscriber circuit (SLC) (12 ₂ ).
₂ ) and the signal tone transmitter (TNS) (1
The ringing tone generated by 3) is transmitted to the calling terminal (MT) via the communication path (p ₁ ) and the subscriber circuit (SLC) (12 ₁ ).
It is returned to (21 ₁ ) [step S3].

[0026] Note that the subscriber (2 ₂₎ Since is absent, continuing calling terminal (MT) (21 ₂₎ in the call signal is continuously sent [Step S4], the terminal (MT) (21 ₂₎ other subscriber presence near you notice condition (2 _3),
In order to transfer an incoming call to the subscriber (2 ₂ ) to a predetermined transfer destination subscriber (2 ₄ ), it is set for call transfer after calling from the terminal (MT) (21 ₃ ). and for during the call forwarding special number (SN) [for example, (# 2) number], transfer source telephone number (DN _S) [terminal of the current in the call (MT) (2
1 ₂ ) telephone number (DN ₂ )] and transfer destination telephone number (D
N _D ) [Currently the transferee subscriber (2 ₄ ) telephone number (D
N ₄ )] and dial.

In the exchange (1), the central control unit
(CC) (16) is the terminal (MT) (21₃) Call
When it is issued [Step S5], the network is
The communication path (p) in the work (NW) (11)₃)
Terminal (MT) (21₃) Is a PB signal receiver (PBR)
(15) is connected [step S6], and the terminal (MT) (2
1 ₃) Dialed numbers sent from the PB signal receiving unit
(PBR) (15) enables reception.

The central control unit (CC) (16) receives and analyzes the number sent from the terminal (MT) (21 ₃ ) via the PB signal receiving unit (PBR) (15) [step S
7], a transfer-during-call special number (SN) [= (# 2)], a transfer-source telephone number (DN _S ) [= (DN ₂ )] and a transfer-destination telephone number (DN _D ) [= ( When it is identified that the DN ₄ )] has been received [step S8], the in-call transfer control unit (163) is activated.

Transferring call control unit (163) which has been activated
The incoming terminal (MT) (21 ₂₎ and stops sending the call signal to the transfer destination telephone number (DN _D) transfer destination terminal (MT) which is designated by [= telephone number (DN _4)] (2
For sending a call signal to 1 _4), the network (N
W) After releasing the set speech path (p ₂ ) in (11), the speech path (p ₄ ) is set. When releasing the speech path (p ₂ ), the speech path (p ₃ ) is also released [step S9].

Thereafter, the call signal generated by the call signal transmission unit (RG) (14) is transferred to the transfer destination terminal (MT) (2) via the call path (p ₄ ) and the subscriber circuit (SLC) (12 ₄ ).
1 ₄ ).

Subsequently, the call transfer control unit (163) activates the call transfer registration unit (164), and transfers the transfer source telephone number (DN _S ) [= (DN ₂ )] and the transfer destination telephone number (D).
N _D ) [= (DN ₄ )] is transmitted.

Transferred call registration unit (164)
Uses the transfer source telephone number (DN _S ) [= (DN ₂ )] and the transfer destination telephone number (DN _D ) [= (DN ₄ )] transmitted from the call transfer control unit (163) as the main storage device. (M
M) transfer data table (17) provided in (17)
It is registered in correspondence with 1) [step S10].

Subsequently, the call transfer registration unit (164) activates the transfer registration notification unit (165) and transfers the transfer source telephone number (D).
N _S ) [= (DN ₂ )] and the transfer destination telephone number (D
N _D ) [= (DN ₄ )] is transmitted.

The activated transfer registration notifying section (165)
Within the network (NW) (11)_Five)
Transfer transmitted from the call transfer registration unit (164)
Former telephone number (DN_S) [= (DN₂)] And forwarding destination
Talk number (DN_D) [= (DN _Four)] Display data transmission section
(DDT) (18) and then the telephone number (DN₂)
Specified terminal (MT) (21₂), Currently absent
It is registered and the transfer destination telephone number (DN_D) Is the phone number
(DN_Four) Display data for notifying that
"While registering call forwarding, the transfer destination phone number is (DN_Four) ”]
Edit the terminal (MT) (21₂) To forward
[Step S11].

The display data transmission unit (DDT) (18)
In accordance with the instruction from the transfer registration notifying unit (165), the above-mentioned display data ["destination transfer registration is in progress, the transfer destination telephone number is (DN
₄ ) ”] is edited and transferred to the terminal (MT) (21 ₂ ) via the signal path for display data transfer of the communication path (p ₅ ) and the subscriber circuit (SLC) (12 ₂ ).

The terminal (MT) (21 ₂ ) displays the display data transferred from the display data transmission unit (DDT) (18) ["destination transfer registration, transfer destination telephone number is (DN ₄ )"].
Is received and is visually displayed on the display unit (DP) (22 ₂ ).

On the other hand, the terminal (MT) (2) receiving the call signal
When the subscriber (2 ₄ ) who notices 1 ₄ ) responds, the central controller (CC) (16) sends a message to the network (NW) (1
After releasing the already set communication paths (p ₁ ) and (p ₄ ) in ₁ ), the communication path (p ₆ ) is set and the calling terminal (MT)
(21 ₁ ) and the transfer destination terminal (MT) (21 ₄ ) are connected to enable communication between the calling subscriber (2 ₁ ) and the transfer destination subscriber (2 ₄ ).

When an incoming call arrives at the subscriber (2 ₂ ) thereafter,
In accordance with a known procedure, the absent transfer control unit (161) in the central control unit (CC) (16) searches the transfer data table (171) and sets the transfer source telephone number (DN _S ) [= (DN ₂ )]. Correspondingly registered transfer destination telephone number (DN _D ) [= (DN
According _4)], the terminal (MT) (21 ₂₎ the destination terminal an incoming call to (MT) (21 ₄₎ automatically transferred to [Step S1, S2, S12].

When the subscriber (2 ₂ ) who has left his seat returns, the display (DP) (2) of the terminal (MT) (21 ₂ ) is returned.
[ "Away Transfer registration, call forwarding number (DN _4)"] Display data displayed on the 2 ₂₎ by paying attention to, that the terminal (MT) (21 ₂₎ is in the call forwarding registration When the terminal (MT) (21 ₂ ) subsequently receives an incoming call, the terminal (MT) (21 ₂ ) receives the call signal. Then, when the subscriber (2 ₂ ) responds, the call becomes possible via the call path (p ₆ ) set in the network (NW) (11) [steps S1 to S3, S1.
3].

As is apparent from the above description, according to the present embodiment, while the absent terminal (MT) (21 ₂ ) is continuously receiving the ringing signal, the other subscriber (2 ₃ ) receives the call signal. (MT)
By executing a predetermined call transfer operation from (21 ₃ ), an incoming call to the terminal (MT) (21 ₂ ) can be transferred to a predetermined transfer destination terminal (without replying to the calling subscriber (2 ₁ ). It is possible to automatically transfer the data to the MT (21 ₄ ) and also to transfer the terminal (MT) (21 ₂ ) to the transfer source and the terminal (M).
Transfer data table (171) with T) (21 ₄ ) as transfer destination
Will be registered in, subsequently the terminal (MT) incoming call for (21 _2), the terminal (MT) (21 ₂₎ to without sending a call signal, direct transfer destination terminal (MT) (21 ₄₎
A call signal will be sent to.

Further, it is displayed on the terminal (MT) (21 ₂ ) that the subscriber (2 ₄ ) is the transfer destination and the absence transfer registration is being performed, and the subscriber (2 ₂ ) who is away from the desk Make the situation understandable when returning.

2 and 3 are merely examples of the present invention until now. For example, the exchange (1) has a call transfer control unit (163), a call transfer registration unit (164) and a transfer registration notification. The unit (165) is not limited to the one having all the units, and only the call transfer control unit (163) or only the call transfer control unit (163) and the call transfer registration unit (164) is provided. Although this is also considered, the effect of the present invention does not change in such a case. The transfer operation during a call is not limited to the illustrated one, and many other modifications may be considered, for example, the transfer operation during a call may be executed by operating a dedicated function button provided in the terminal (MT) (21). However, the effect of the present invention does not change in any case. Further, the display data during the absence transfer registration is not limited to the illustrated one, and many other modifications such as turning on a dedicated function lamp provided in the terminal (MT) (21) may be considered. In any case, the effect of the present invention does not change. Further, the exchange (100) which is the object of the present invention is not limited to the exchange (1) shown in the figure, and the network (N
W) (11) is composed of a time division speech path device, and a call signal is sent from the subscriber circuit (SLC) (12) to the subscriber (2). In this case, the effect of the present invention does not change.

[0043]

As described above, according to the present invention, in the exchange, according to the present invention (Claim 1), a terminal other than the calling terminal and the called terminal can reach the called terminal without responding to the calling terminal one by one. It becomes possible to transfer the incoming call of the above to a predetermined transfer destination terminal, and according to the present invention (Claim 2),
Terminals other than the originating terminal and the terminating terminal can transfer the incoming call to the terminating terminal to the specified transfer destination terminal, and the transfer destination terminal is registered for call forwarding to the terminating terminal. Is automatically transferred to the transfer destination terminal, and according to the present invention (Claim 3), terminals other than the calling terminal and the receiving terminal send an incoming call to the receiving terminal to a predetermined transfer destination terminal. The transfer becomes possible, and the transfer destination terminal is registered to the called terminal as an absent transfer registration, and it is possible to display that the transfer destination terminal has been registered to the called terminal as an absent transfer registration, which greatly improves the convenience of the exchange.

[Brief description of drawings]

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

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

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

FIG. 4 is a diagram showing an example of a conventional exchange.

[Explanation of symbols]

 1, 100 Switch 2 Subscriber 11 Network (NW) 12 Subscriber circuit (SLC) 13 Signal tone transmitter (TNS) 14 Ringer signal transmitter (RG) 15 PB signal receiver (PBR) 16 Central controller (CC) 17 Main Storage Device (MM) 18 Display Data Transmission Unit (DDT) 21, 200 Terminal (MT) 22, 201 Display Unit (DP) 101 Calling Transfer Means 102 Calling Transfer Registering Means 103 Transfer Registration Notifying Means 161 Absent Transfer Control Part 162 Substitution Response Control Unit 163 Calling Transfer Control Part 164 Calling Transfer Registering Part 165 Transfer Registration Notifying Part 171 Transfer Data Table

Claims (3)

[Claims] 1. The switching terminal (200) and the receiving terminal (20 ₁ ) are receiving a call from the calling terminal (200 ₁ ) to the receiving terminal (200 ₂ ) while calling.
0 ₂₎ other than the terminal (200 _3), and the receiving terminal (200 ₂₎ in the call, specifying a transfer destination terminal for transferring (200 ₄₎ an incoming call to said called terminal (200 ₂₎ Incoming When the operation specified for call forwarding is performed,
Call-in-progress transfer means (101) for transferring a call in which the called terminal (200 ₂ ) is being called to the transfer destination terminal (200 ₄ ).
A method for transferring a call during an incoming call, which is characterized in that 2. In an exchange (100) having a call forwarding function for forwarding an incoming call to a pre-registered forwarding destination, while the incoming call is received from the calling terminal (200 ₁ ) to the receiving terminal (200 ₂ ), From the terminal (200 ₃ ) other than the calling terminal (200 ₁ ) and the called terminal (200 ₂ ), the called terminal (200 ₂ ) being called and the called terminal (20
0 ₂ ), a call to which the incoming call terminal (200 ₂ ) is ringing is performed when an operation defined for forwarding the incoming call is specified with a transfer destination terminal (200 ₄ ) to which the incoming call is transferred. and a call in transfer means (101) for transferring said to the transfer destination terminal (200 _4), the transfer destination terminal call in transfer means (101) is transferred (200 _4), to said receiving terminal (200 ₂₎ It is registered as a call forwarding terminal, and thereafter the called terminal (200
₂ ) The incoming call to the call forwarding destination terminal (200 ₄ )
To a call transfer registering means (102) capable of transferring by the call forwarding function. 3. An exchange (100) equipped with a call forwarding function for forwarding an incoming call to a pre-registered forwarding destination, while the incoming call is received from the calling terminal (200 ₁ ) to the receiving terminal (200 ₂ ) while calling. From the terminal (200 ₃ ) other than the calling terminal (200 ₁ ) and the called terminal (200 ₂ ), the called terminal (200 ₂ ) being called and the called terminal (20
0 ₂ ), a call to which the incoming call terminal (200 ₂ ) is ringing is performed when an operation defined for forwarding the incoming call is specified with a transfer destination terminal (200 ₄ ) to which the incoming call is transferred. and a call in transfer means (101) for transferring said to the transfer destination terminal (200 _4), the transfer destination terminal call in transfer means (101) is transferred (200 _4), to said receiving terminal (200 ₂₎ It is registered as a call forwarding terminal, and thereafter the called terminal (200
₂ ) The incoming call to the call forwarding destination terminal (200 ₄ )
To the call transfer registering means (102) that enables transfer by the call forwarding function and the call transfer registering means (102).
00 ₂ ), information indicating that the call forwarding has been registered is displayed on the display unit (2) of the receiving terminal (200 ₂ ).
01) is provided with a transfer registration notifying means (103).