JPH0683297B2 - Digital phone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention is connected to a digital network through a digital subscriber line in which two information channels and signal channels are time-division multiplexed and is transmitted between terminals by signal channels. The present invention relates to a digital telephone which realizes a high-level automatic transfer / call service in a home device by utilizing the low-speed packet or user signal transfer function and two information channels.

[Conventional technology]

Conventionally, there is no single telephone that realizes the transfer telephone function of this type, and an automatic transfer apparatus that accommodates the single telephone as a kind of main device in the existing analog network and realizes the transfer call function is known.

FIG. 7 is a block diagram showing an example of a conventional automatic transfer apparatus. 100 is an automatic transfer apparatus accommodating lines L ₁ and L ₂ and a telephone set A, 101 is a call for detecting an incoming call to the line L ₁ . A signal detection circuit, 102 is a dial transmission circuit for the line L ₂ , 103 is a response detection circuit for the line L ₂ , 104 is a response circuit for the line L ₁ , and 105 is a circuit for connecting the lines L ₁ and L ₂ to each other. The switch circuit 106 controls the circuits of the ringing signal detection circuit 101 to the switch circuit 105, and B and C denote telephones.

Next, the operation will be described. When there is an incoming call from the telephone set B via the line L ₁ , this is detected by the calling signal detection circuit 101 and is notified to the control circuit 106. When the transfer mode is set, the control circuit 106 activates the dial transmission circuit 102 to automatically make a call to the telephone C, which is the transfer destination. Next, when the telephone C answers, it is detected by the response detection circuit 103 and notified to the control circuit 106. The control circuit 106 then activates the response circuit 104 to respond to the telephone set B, and activates the switch circuit 105 to connect the lines L ₁ and L ₂ . By operating in this way, an incoming call from the telephone set B to the telephone set A is transferred to the telephone set C, and a telephone call between the telephone set B and the telephone set C is enabled.

[Problems to be solved by the invention]

Since the conventional automatic transfer device is configured in this way,
It had the following drawbacks.

Since only one transfer destination can be set, if there is no recipient at the transfer destination, the transfer call cannot be made and contact cannot be made in case of emergency.

Since the forwarding operation is always performed for incoming calls, it also forwards less important incoming calls.

Even if you can set multiple forwarding destinations as a countermeasure for, if you call the first forwarding destination and there is no response, access is done in order to disconnect and restore the line and call the next forwarding destination. Therefore, it may take time, and in the meantime, the caller (phone B) may abandon on the way and may not make a functional sense.

Similarly, if a plurality of transfer destinations can be set and the first transfer destination responds, the conventional device completes the transfer operation, but the transfer setting person is not always there.
In this case as well, it does not make sense functionally.

The object of the present invention is to make the most of the digital subscriber line and network functions, and is almost the same as the basic configuration of a digital telephone in terms of hardware. However, by adding a function by program control, the above-mentioned drawbacks can be solved. It is to provide a digital telephone that realizes the solved advanced automatic transfer / call service as a single function of the telephone.

[Means for solving problems]

A digital telephone according to the present invention stores a required number of character messages and a required number of transfer destination numbers, and also stores a calling party number when receiving an incoming call signal when a transfer mode is set, and a predetermined user signal. User signal identifying means for identifying as a command, and when a call is received when the transfer mode is set, a character message is transmitted to the caller by a signal channel packet, and
A signal channel for transmitting a character message to a transfer destination number by a broadcast signal channel packet, and transmitting the caller number by a signal channel packet when receiving a caller number notification command from the user signal identifying means. Packet automatic transmission means, automatic transmission means for transmitting using the information channel which is not used for the transfer destination number when receiving a transfer instruction from the user signal identification means, and similarly transmitted from the user signal identification means And an automatic incoming call answering means for answering an incoming call to an information channel which is receiving an incoming call, the automatic outgoing call means for making the outgoing call, and the automatic incoming call answering means for making an automatic incoming call. Second
And a switch control means for connecting the information channels.

[Action]

According to the present invention, when there is an incoming call on either the first or second information channel during the transfer mode setting, the calling party number notified from the network at that time is stored in the storage means, and the signal channel packet automatic transmission means is stored. Sends a character message to the caller indicating that the transfer destination is being searched using a signal channel packet. Similarly, the signal channel packet broadcasts the presence or absence of the transfer setter to a plurality of transfer destinations. Send a character message to inquire. When the user signal identification means receives a command for notifying the location of the transfer setting person and the calling party number by the user signal sent through the signal channel as a response, the signaling channel packet automatic transmission means is notified of the calling party number. And then receives a transfer instruction from the transfer mode setter using the user signal, the user signal identification means sends the automatic transmission means to the transfer destination number where the location of the transfer mode setter is confirmed. Send an order. At the same time, the automatic incoming call response means is activated to instruct the incoming call to the incoming information channel. At this time, the switch control means is the first
And the second information channel is interconnected to implement a transfer call.

〔Example〕

FIG. 1 is a diagram for explaining an embodiment of the digital telephone of the present invention. In the figure, reference numeral 1 denotes an interface circuit, which includes a first and second information channels B ₁ and B ₂ and a signal channel D commonly used for the _first and _second information channels B ₁ and B ₂ . Terminates the digital subscriber line for time division multiplexing transmission and assembles / disassembles the transmission frame. Reference numeral 2 denotes an input / output signal control unit, which is composed of a microprocessor architecture, and is used for basic monitoring signals such as call origination, call termination, response, disconnection, restoration, etc., and a selection signal and an origination signal via a signal channel D. It exchanges call control signals such as caller number information, low-speed packets, and user signals, and controls input / output control and in-device control. Reference numeral 3 is a storage means including a RAM or the like, which stores a required number of character messages, a calling party number that received an incoming call, and a required number of transfer destination numbers. Reference numeral 4 denotes a user signal identifying means which identifies and outputs a predetermined user signal as a command. Reference numeral 5 is an automatic incoming response means for storing the calling party number in the storage means 3 when an incoming call signal is received when the transfer mode is set. 6 is a signal channel packet automatic transmission means for transmitting a character message to a caller when there is an incoming call when the transfer mode is set.
Channel packet), a character message is transmitted to the transfer destination number by a D channel packet after the automatic call answering means 5 is activated, and when the user signal identification means 4 receives a caller number notification command. Send the calling party number in a D channel packet. Reference numeral 7 denotes an automatic transmission means, which transmits to the transfer destination number when receiving a transmission instruction from the user signal identification means 4. 8 is a switch control means, first, the channel switching circuit 8a for selecting the second information channel B _1, B _2, the first information channel B ₁ sends a second receiving information channel B ₂ and composed of a cross-switch circuit 8b which connects the second receiving information channel B ₂ and the second information channel B ₂ sends another. Reference numeral 9 is a codec, 10 is a communication circuit, 11 is a handset, and 12 is a display, which displays a dial monitor, a calling party number, and a character message transmitted / received in a low-speed packet. 13 is a dial for registering the forwarding number and setting of the forwarding mode, 14 is a function key, 15 is a hook switch, 16
Is a calling circuit, 17 is a sounder, and 18 is a clock function.

As a technical background of the present invention, the digital telephone of the present invention has been approved by the International Telegraph and Telephone Consultative Committee (CCITT).
Standards I.430, I.441, I.451 for recommended international standardization
Etc.

According to it, a digital subscriber line logically carries a first and a second information channel B ₁ , B ₂ (both 64 kb / s) and both information channels B for transmitting digitally encoded voice information. It is composed of a signal channel D (16 kb / s) for exchanging signals relating to the call connection of ₁ and B ₂ between the terminal and the network, and is physically time-division multiplexed on two lines. The signal transmitted / received on the signal channel D is transmitted / received like a message using a frame format (HDLC) as shown in FIG.

In FIG. 2, F is a flag pattern, A is an address field, C is a control field, and FCS is a flag check sequence.

Signal types include call origination, call arrival, response, disconnection, release, etc., and information necessary for processing each signal is included in each signal message. For example, in the case of a calling message, parameters such as the destination address (partner number), the calling address (sender number), the identifiers of the first and second information channels B ₁ and B ₂ are included. That is, the signals for the first information channel B ₁ and the signals for the second information channel B ₂ can be separately transmitted and received on the same signal channel D, and the signal channels D of all subscriber lines are terminated by the exchange. Therefore, regardless of the call setup of the first and second information channels B ₁ , B ₂ , all signaling channels D can be logically connected via the exchange.

By taking advantage of such a characteristic of the signal channel D as a common signal line, not only call connection signals but also data transfer between terminals can be easily realized, and a user information transfer function by a D channel packet or signal channel D is provided. As
It is also recommended.

In this embodiment, the input / output signal controller 2 includes a microprocessor, a program memory (ROM), a data memory (RA
M) and peripheral circuits, and implement various functions by program control.

FIG. 3 is a diagram for explaining the configuration of the program module (hereinafter abbreviated as PM) of the input / output signal control unit 2 which is activated when the automatic transfer mode is set by the function key 14 and the network function and hardware interface related to each module. Is.

Next, the operation when the automatic transfer mode is set will be described.
When there is an incoming call (if the incoming channel is assumed to be the first information channel B ₁ ), that is, when an incoming call signal is received via the signal channel D ′ decomposed by the interface circuit 1, the automatic incoming call response means 5 stores in the storage means. The caller number is stored in 3, and the D-channel packet automatic transmission means 6 uses that number to send a character message to the caller, for example, "Please transfer your telephone. Please wait as it is." Send by D channel packet. Then, using the D channel packet based on the transfer destination number stored in the storage means 3, for example, "Is there an A (transfer setting person). Please tell me that there was a call." Send a character message. If A is at some transfer destination, A uses the transfer destination telephone to notify the user's whereabouts by the user signal transfer function by the D channel between the terminals. This signal is identified by the user signal identification means 4, whereby the user signal identification means 4 knows the transfer destination where A is located, and the D channel packet automatic transmission means 6 sends the signal to the transfer destination where A is located. Issue a caller ID notification command. The D-channel packet automatic transmission means 6 receiving this, for example, "○○○-○"
Call from Mr. ○○○ (caller ID). Would you like to transfer it? “A character message is sent in a D channel packet. In response, A uses a user signal (for example, presses dials“ # ”“ 0 ”“ 0 ”) to instruct the transfer, and the user signal identification means 4 recognizes it. Then, at the same time as issuing a call command to the automatic sending means 7, the automatic incoming call responding means 5 is instructed to answer the incoming call. In response to this, the automatic transmission means 7 uses the information channel that is not being used (the second information channel B ₂ here) to make a call to the transfer destination number of A, and the automatic incoming response means 5 First incoming call
Incoming call response is made to the information channel B _{1 of} . At this time,
The switch control means 8 turns on the cross switch circuit 8b and interconnects the first and second information channels B ₁ and B ₂ to enable a call between the caller and the transfer setter. FIG. 4 shows the above operation sequence.

It should be noted that, in this embodiment, during the search of the transfer destination, the incoming call of the _first information channel B ₁ remains in the calling state.
Since the caller holds the state, the transfer request is considered to be intent. Therefore, when the caller abandons the call midway, the transfer operation may be stopped or only the caller number may be notified to the transfer setter by a message.

Further, the caller's intention of the transfer request can be confirmed by utilizing the message by the D channel packet and the user signal identification function. When the intention of the caller's transfer request can be confirmed in this way, Even if the caller disconnects the call, conversely, the first information channel B ₁ may be used to automatically make a call based on the caller number.

In addition, when there is no transfer setting person at all transfer destinations when searching for transfer destinations, it may be possible to send a message to the caller stating that it was not found, but by installing a voice synthesizer , It is also possible to convert the character message into a synthetic voice and play it.

FIG. 5 is a diagram showing a program configuration in another embodiment of the present invention, which is different from FIG. 3 in that a function realized by the program is added as a new component.

In FIG. 5, a caller number sent at the same time as an incoming call is compared with telephone directory data registered in advance in the storage means 3, and an automatic transfer operation is selectively started only for important incoming calls.

FIG. 6 is a diagram showing a program structure in still another embodiment of the present invention. In this embodiment, a clock function 18 is provided, a schedule and, for example, a transfer destination number of a conference room or a business trip destination are registered in the storage means 3, and the transfer mode is automatically entered when the time zone is entered. It is composed of, and is more sophisticated. Of course, it is possible to have both the selective transfer by the calling party number and the automatic transfer mode setting by the schedule.

〔The invention's effect〕

As described above, according to the present invention, a message is transmitted via a signal channel to an incoming call while the transfer mode is set, and at the same time, a plurality of transfer destinations are broadcasted to other transfer destinations via other signal channels. Inquires about the presence / absence of the caller After confirming the transferor's whereabouts, the caller number is notified, and if there is an instruction from the transfer mode setter, another information channel is used to automatically call the transfer destination where the transfer setter's whereabouts are confirmed. At the same time, the first and second information channels are interconnected to enable transfer calls. Furthermore, by combining with a telephone directory, only important incoming calls can be selectively transferred or a schedule function can be combined. Since the configuration is such that the transfer mode can be automatically entered, there is an advantage that an extremely advanced and intelligent automatic transfer call service can be realized.

[Brief description of drawings]

FIG. 1 is a diagram for explaining an embodiment of a digital telephone of the present invention, FIG. 2 is a diagram showing a frame format of a signal transmitted and received on a signal channel, and FIG. 3 is a digital telephone in the embodiment of FIG. FIG. 4 is a diagram showing a sequence when a transfer mode is set, FIGS. 5 and 6 are program configuration diagrams in another embodiment of the present invention, and FIG. 7 is a diagram for a conventional analog network. It is a block diagram of an automatic transfer device. In the figure, 1 is an interface circuit, 2 is an input / output signal control unit, 3 is a storage unit, 4 is a user signal identification unit, 5 is an automatic incoming response unit, 6 is a signal channel packet automatic transmission unit, 7 is an automatic transmission unit, 8 is a switch control means, 8a is a channel switch circuit, 8b is a cross switch circuit, 9 is a codec, 10 is a call circuit, 11 is a handset, 12 is an indicator, 13 is a dial, 14 is a function key, 15 is a hook switch, 16 is a calling circuit, 17 is a sounder, 18 is a clock function, B ₁
Is a first information channel, B ₂ is a second information channel, and D is a signal channel.

Claims (3)

[Claims] 1. A first and a second information channel for transmitting digitally encoded speech information and the first information channel.
And a function of packet communication and user signal transfer by a signal channel between terminals connected to a digital subscriber line for time-division multiplexing transmission of a signal channel for exchanging signals related to call connection of a second information channel between a terminal and a network. In the digital telephone accommodated in the provided digital network, storage means for storing a required number of character messages and a required number of transfer destination numbers, and storing a calling party number when an incoming call signal is received when the transfer mode is set, User signal identifying means for identifying a predetermined user signal as a command, and transmitting the character message to a caller by a signal channel packet when a call is received when the transfer mode is set, and the character message for the transfer destination number. Is broadcast by a signal channel packet, When a command for notifying the calling party number is received from the user signal identifying means, a signal channel packet automatic transmitting means for transmitting the calling party number by a signal channel packet, and a transfer instruction from the user signal identifying means Automatically transmitting means for transmitting using the information channel that is not used for the transfer destination number, and similarly for receiving an incoming call response to the information channel being received when the transfer instruction is received from the user signal identifying means. Automatic incoming call answering means,
A digital telephone, comprising: a switch control means for connecting the first and second information channels when the automatic call means makes an automatic call and the automatic call answering means makes an automatic call. 2. A telephone directory is provided, and when a transfer mode is set, a caller number received when an incoming call arrives is collated with the telephone directory, and when the result matches, a transfer operation is selectively performed. The digital telephone set forth in claim 1. 3. A schedule function and a clock function are provided,
The incoming time is compared with the schedule, the transfer mode is automatically entered according to the result, and the transfer operation is performed for the telephone number set in the schedule. Digital telephone set forth in paragraph.