JPH01307393A - Key telephone system - Google Patents

Abstract

PURPOSE:To enhance the serviceability of the title key telephone system by automatically transferring a call to another telephone set designated beforehand when the call is placed, and further automatically transferring the call to the next transfer destination designated beforehand when the first transfer destination is busy. CONSTITUTION:When a incoming call detecting circuit 12 detects the incoming call, a telephone number is read from a first memory circuit 6, transmitted through a dial signal sending circuit 24 to a line L2, when a busy sound detecting circuit 25 detects a busy sound from the line L2 for the transmission, the telephone number is read from a second memory circuit 9, and it is sent through a dial signal sending circuit 24 to the line L2. Thereafter, a voice channel switching circuit 3 combines the voice of a receiving line L1 and the voice of the transmitting line L2, and speaking is attained. Consequently, when the call is placed, it is automatically transferred to the other telephone set designated beforehand, and when the first transfer destination is busy, it can be further automatically transferred to the next transfer destination designated beforehand. Thus, the serviceability of the key telephone system can be enhanced.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a button telephone device, and more particularly to a button telephone device that has a built-in microprocessor and controls the device using a stored program method.

[Conventional technology]

There are a wide variety of telephone services available to users, and as for telephones themselves, loudspeaker telephones and the like have been developed, and data telephones and the like have been provided depending on the type of use. Furthermore, there are many key telephone devices that allow multiple telephones to be used together, to temporarily hold telephone lines, to transfer calls, and to make calls between extensions. Used in offices and stores.

This type of button telephone device generally includes a main device that performs various controls, a button telephone equipped with various command buttons, and a communication path connecting these devices. By pressing the command button on the telephone, the main device is activated to perform various controls, such as responding to an incoming signal from an incoming line and transferring it to another button telephone, or controlling the voltage level of the line. It is being used to detect calls and end calls.

[Problem to be solved by the invention]

Such conventional key telephone devices allow the user to answer an incoming call and transfer the call to another key telephone by pressing a command button on the key telephone. If the caller did not respond, the call could not be automatically transferred to another key telephone device, etc. In other words, even if another user answers an incoming call, such as when the user leaves the key telephone device due to an emergency or moves to a place where a telephone with a different number is installed,
If you don't know the phone number, you won't be able to forward it, and if you're away, you won't be able to press a button to answer it.

SUMMARY OF THE INVENTION An object of the present invention is to provide a button telephone device which can eliminate such drawbacks and automatically transfer an incoming call to another pre-designated telephone.

[Means to solve the problem]

The present invention is composed of a button telephone and a main device, and the main device includes a first memory circuit that stores a telephone number, a dial signal sending circuit that sends the telephone number stored in this memory circuit to a calling line, In a button telephone device equipped with a voice communication path switch circuit that combines the voice of an incoming line and the voice of an outgoing line, the main device includes: an incoming call detection circuit that detects an incoming call; and a second memory that stores a telephone number. a busy tone detection circuit that detects a busy tone sent through the line; and when the incoming call detection circuit detects an incoming call, the telephone number stored in the first memory circuit is sent to the dial signal. a first transmitting means for transmitting the telephone number from the transmitting circuit to the line; and after the first transmitting means transmits the telephone number, when the busy tone detection circuit detects the busy tone, the second memory The present invention is characterized by comprising a second transmitting means for transmitting the telephone number stored in the circuit from the dial signal transmitting circuit to the line.

[Effect]

When the incoming call detection circuit detects an incoming call, the first calling means reads the telephone number from the first memory circuit and sends it to the line through the dial signal sending circuit. When the busy tone detection circuit detects a busy tone from the line in response to this call,
The second transmitting means reads the telephone number from the second memory circuit and transmits it to the line through the dial signal transmitting circuit.

Thereafter, the voice communication path switch circuit combines the voice of the incoming line and the voice of the outgoing line to enable a telephone conversation.

Therefore, according to the button telephone device of the present invention, when an incoming call is received, the call can be automatically transferred to another pre-designated telephone, and furthermore, when the first transfer destination is busy, the next telephone number specified in advance can be forwarded. can be automatically forwarded to the destination.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a key telephone device according to the present invention. This button telephone device consists of a main device and a plurality of button telephones (only one button telephone 8 is shown in the figure), and includes line interface circuits 1 and 2 that perform signal processing corresponding to each line, and voice A voice communication path switch circuit 3 that separates and connects communication paths, a data input/output circuit 4 that performs data input/output processing, a central processing unit (microprocessor) 5 that performs various arithmetic and control operations based on predetermined programs; A first memory circuit 6 that stores the telephone number of the first forwarding destination, a second memory circuit 9 that stores the telephone number of the second forwarding destination, and a telephone interface circuit 7 that performs signal processing corresponding to the button telephone. and a line interface circuit 1.2 comprising:
Incoming line L via relay circuit RIL R21, respectively.
Audio interface circuit 11.21, relay circuit R11, R21 that performs audio signal processing of 1 and transmission circuit & SL2
Incoming call detection circuit 12.22 detects incoming calls via relay circuits R12 and R22, polarity reversal detection circuit 13.23 detects line polarity reversal via relay circuits R12 and R22, and relay circuit R12°R.
22, and a busy tone detection circuit 15.25, which detects when the other party is talking.

Further, the telephone interface circuit 7 includes a voice interface circuit 71 connected to the button telephone 8 and a data transmitting/receiving circuit 72. The voice interface circuit 11.21 and the voice interface circuit 71 are connected to the voice communication path switch circuit 3, and are connected to an incoming call detection circuit 12.22, a polarity reversal detection circuit 13.23, a dial signal sending circuit 14.24, and a busy tone. Detection circuit 15.25
and the data transmitting/receiving circuit 72 are both connected to the data input/output circuit 4.

When the user operates a button on the button telephone 8, predetermined information is sent to the central processing bag W5 via the data transmission/reception circuit 72 and the data input/output circuit 4, and a forwarding destination telephone number is input by the button operation. , the central processing unit 5 receives the input telephone number through the data input/output circuit 4,
The telephone number of the first transfer destination is stored in the first memory circuit 6 and
The telephone numbers of the transfer destinations are respectively stored in the second memory circuit 9.

When a call arrives on the incoming line L1 with the forwarding destination telephone number stored in the memory circuit 6.9, the incoming call detection circuit 12 detects this and sends the information to the data input/output circuit 4. The data is then sent to the central processing unit 5 via the central processing unit 5. As a result, the central processing unit 5 activates the relay circuits R21 and R22 and the dial signal sending circuit 24, operates as a first calling means, reads out the first transfer destination telephone number from the first memory circuit 6, and makes the call. Dial to line L2. Thereafter, the central processing unit 5 uses the polarity reversal detection circuit 23 to monitor the other party's response, and the busy tone detection circuit 25 to monitor the other party's busy state.

When the polarity reversal detection circuit 23 detects a response from the calling party by reversing the polarity of the calling line L2, the central processing unit 5 drives the relay circuit R11 semi-connected to the receiving line L1 to respond to the calling party on the receiving line L1. Then, the incoming line L1
The voice of the outgoing line L2 is combined by the voice communication path switch circuit 3 through the voice interface circuit 11.21, and the transfer operation is completed.

Further, if the busy tone detection circuit 25 detects that the destination is busy after making a dial call to the first transfer destination through the calling line L2, the central processing unit 5 acts as a second calling means. It operates to read the telephone number from the second memory circuit 9, activate the dial signal sending circuit 24 to make a dial call, and transfer the call to the second transfer destination in the same manner as in the case of the first transfer.

Thereafter, when the other party to whom the transmission line L2 is transferred ends the call, the polarity reversal detection circuit 23 connected to the transmission line L2 detects this, and as a result, the central processing unit 5
, R12, R21, and R22 to open lines LL and L2.

In this way, with the button telephone of the present invention, when an incoming call is received, it can be automatically forwarded to another pre-designated telephone, and furthermore, if the first forwarding destination is busy, the next telephone designated in advance can be forwarded. It can be automatically forwarded to the destination.

〔Effect of the invention〕

As explained above, the present invention is composed of a button telephone and a main device, and the main device includes a first memory circuit that stores a telephone number, and a dialer that sends the telephone number stored in this memory circuit to a calling line. In a button telephone device equipped with a signal sending circuit and a voice communication path switch circuit that combines the voice of the incoming line and the voice of the outgoing line, the main device includes an incoming call detection circuit that detects incoming calls and a phone number storage. Second
a memory circuit, a busy tone detection circuit that detects a busy tone sent through the line, and a dialing signal sending circuit that transmits the telephone number stored in the first memory circuit when the incoming call detection circuit detects an incoming call. and a second memory circuit stores a telephone number when a busy tone detection circuit detects a busy tone after the first transmitting means transmits a telephone number. and second transmitting means for transmitting the number from the dial signal transmitting circuit to the line.

Therefore, according to the present invention, when an incoming call is received, it is possible to automatically transfer the call to another pre-designated telephone.
Furthermore, it is possible to realize a key telephone device that can automatically transfer the call to a pre-specified next transfer destination when the first transfer destination is busy.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. 1.2...Line interface circuit 3...Voice communication path switch circuit 4...Data input/output circuit 5...Central processing unit 6...First memory circuit 7...Telephone interface circuit 8...Button telephone 9...Second memory circuit 11, 21.71...Audio interface circuit 12,
22... Incoming call detection circuit 13, 23... Polarity reversal detection circuit 14, 24... Dial signal sending circuit 15, 25...
・Busy sound detection circuit 72...Data transmission/reception circuit R11, R12, R21, R22...Relay circuit Ll
, L2...Line agent Patent attorney Yoshiyuki Iwasa

Claims (1)

[Claims] (1) Consisting of a button telephone and a main device, the main device includes a first memory circuit that stores a phone number, a dial signal sending circuit that sends the phone number stored in this memory circuit to a calling line, and an incoming call. In a button telephone device equipped with a voice communication path switch circuit that combines voice on the line and voice on the outgoing line, the main device includes: an incoming call detection circuit that detects incoming calls; and a second memory circuit that stores telephone numbers. a busy tone detection circuit that detects a busy tone sent through the line; and when the incoming call detection circuit detects an incoming call, the telephone number stored in the first memory circuit is sent to the dialing signal sending circuit. a first transmitting means for transmitting the telephone number to the line; and when the busy tone detection circuit detects a busy tone after the first transmitting means transmits the telephone number, the second memory circuit transmits the telephone number; A button telephone device comprising: a second transmitting means for transmitting a stored telephone number from the dial signal transmitting circuit to a line.