JP2633253B2 - Telephone terminal device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a telephone terminal device such as a simple exchange used at home.

[Background Art] FIG. 7 shows an overall model of the telephone terminal which constitutes a simple switch to be used in home, a station line (outside line) 1 to the telephone terminal device A, a plurality of extension 2 ₁ ... And connect
Each extension 2 ₁ is connected to a telephone 3 ₁ .

Each of the telephones 3 ₁ … can communicate with a telephone outside the home through the office line 1, and can also make an extension call between the telephones 3 ₁ ….

Usually for a telephone 3 ₁ ... 2 to about seven in the number for the extension to be connected to the telephone terminal device 1 of this kind, usually 1-digit number is often used for extension calls.

In the case of transmission, there are two types, that is, local line (outside line) transmission and extension line transmission, and "0" transmission is often used as a means for switching between these. FIG. 8 shows the operation procedure in this case. First, in the case of local line transmission, dial "0" after off-hook, and then dial the other party number as a selection signal. In the case of an extension call, a selection number corresponding to the extension number may be dialed immediately after off-hook. Such an operation is a so-called “extension immediately” or “outside line 0 transmission”.

However, in the case of “outgoing outside line 0” as described above,
It is difficult to use for inexperienced people because the way of making a call is different from a normal single phone. Also, if the telephone connected to the extension has a redial function or a speed dial function, there is a disadvantage that the usage becomes complicated.

The operation method shown in FIG. 9 has been considered for such a problem. In this operation method, extension, office line (external line)
In both cases, it is only necessary to dial the selection number, and there is no special rule, which is ideal.

In other words, in the case of "outline promptly", the off-hook of the telephone is detected as shown in FIG.
As shown in FIG. 10, the direct current connection of the office line is performed, and thereafter, as shown in FIG. 10 (b), the dial transmission of the telephone is accepted.

In the case there is no is input first digit of the selection signal of the dial the time t ₁ has elapsed dialing input for the next digit, as Fig. 11 (b) when calling extension determines the extension call. However, in this case, as shown in FIG. 11 (a), the period from when the user goes off-hook until it is determined that an extension is to be transmitted is shown in FIG. 11 (c).
As shown in (1), there is a problem that DC connection is performed and the first digit selection signal is transmitted to the station.

Therefore, for such a reason, it has not been possible to realize a telephone terminal device in which both an extension and an office line (external line) start immediately.

[Object of the Invention] The present invention has been made in view of the above-mentioned problems, and has as its object the use of local operation such as unnecessary DC closing, extension transmission without transmitting a selection signal, and local line. (External line) It is an object of the present invention to provide a telephone terminal device capable of promptly making a call.

DISCLOSURE OF THE INVENTION The present invention relates to a telephone terminal device which connects a telephone to a central office line, performs an outside line call, and performs a local operation such as an internal line call by a selection signal of a predetermined number of digits from the telephone. A transmitting means for transmitting a signal, a hook state detecting means for detecting a hook state of the telephone, a selection signal detecting means for detecting a selection signal from the telephone, and a DC closing means for closing a DC circuit of a central line, Storage means for storing a selection signal from the telephone, and storing the selection signal from the telephone detected by the selection signal detection means in the storage means, and performing local operation after the hook state detection means detects off-hook. If the selection detection means detects the next selection signal within a certain time after the detection of the selection signal of the last digit of the corresponding number of digits, the DC closing means is operated and stored in the storage means. The selected selection signal data is transmitted to the central office via the transmission means. If the selection detection means does not detect the next selection signal within the predetermined time, the DC closing and the transmission means are performed by the DC closing means. Control means for setting the local operation by restricting the transmission of the selection signal data by the above, and after the hook state detecting means detects the hook-off of the telephone until the selection signal of the number of digits corresponding to the local operation is detected. A pseudo dial tone is transmitted to the telephone.

 Hereinafter, the present invention will be described with reference to examples.

FIG. 1 shows a circuit configuration of a device according to an embodiment of the present invention. An incoming call detection circuit 4 detects an incoming call from a local line (external line) 1. A DC closing circuit 5 is a DC circuit of the local line 1. Is closed to send a connection signal to the station. The dial output circuit 6 is transmission means having a function of transmitting a selection signal to the station. The switching circuit 7 is composed of a switch matrix circuit that can freely connect the office line 1 to any extension 2 ₁ .
Connected to The dial pulse detection circuits 8 ₁ ... Constitute a means for detecting a hook switch state and a selection signal of each telephone 3 ₁ . Call signal generating circuit 9 and the call signal during office line incoming a circuit for outputting an extension call signal telephone 3 ₁ ... to. Tone signal generating circuit 10 is a circuit for generating ringing back tone and when extension call, a pseudo tone when the telephone 3 ₁ ... is off-hook.

The CPU 11 constitutes control means of the apparatus of the present invention. The CPU 11 performs a process of judging a signal from each unit and controls each unit to realize a function as a simple exchange. Memory 12 is CP
This is storage means having a function of temporarily rewriting data under the control of U11.

In this embodiment, extension transmission is performed using a single-digit selection signal, and by detecting the time between the transmission of the first-digit selection signal and the second-digit selection signal, a local line (external line) is detected. The operation of the CPU 11 is programmed to discriminate between the transmission and the extension transmission.

Next, the operation of the apparatus of the present invention will be described with reference to the flowchart of FIG. 2 and the timing charts of FIGS.

Now, for example, if it is assumed that the telephone 31 makes a call to the office line (outside line) ₁ of the dial number 908-1131, first, FIG.
Off-hook condition is detected by the dial pulse detection circuit ₈₁ as shown in. Next, as FIG. 3 from the telephone 3 in ₁ (b) 1
If digit selection signal "9" is input, CPU 11 together with stores this selection signal "9" to the memory 12, counts the predetermined time t ₂ from the input, two-digit to the predetermined time t in ₂ It monitors whether the eye selection signal “0” is input. Now the second digit of the selection signal "0" is detected in the predetermined time t ₂ [t _1], it is determined that the station line (external line) call. When it is determined that a local line (outside line) is to be transmitted, the CPU 11 switches the DC closing circuit 5 to the state shown in FIG.
Is performed to close the DC circuit of the station line 1. Since already the second digit of the selection signal at the time of performing the DC閉結is completed, CPU 11 went stores the selection signal data inputted from the telephone 3 ₁ to the memory 12 as described above, the DC described above After the connection, as shown in FIG. 3 (d), the selection signal of the first digit is sequentially read from the memory 12 and transmitted to the office line 1 via the dial output circuit 6 with a delay from the time of dial transmission.

When the transmission of the selection signal is completed, the exchange line 7 is set to the local line communication. After that, when the on-hook is detected, the CPU 11 determines that the transmission of the curved line is completed, and returns each unit to the standby state.

Next, a description will be given of the case of extension transmission. Since extension transmission is performed by a one-digit selection signal, off-hook is detected as shown in FIG. 4 (a), and one-digit transmission is performed as shown in FIG. 4 (b). since the eye selection signal is input not input the next selection signal, CPU 11 detects that the first digit fixed time t ₂ from the input of has passed becomes extension call operation determines that the extension calling, 4th As shown in FIG.
And fourth without selection signal sent to the central office line 1 as shown in the figure (d), and the telephone 3 ₁ through the exchange circuit 7, and connects the called extension telephone off-hook the internal call status Set until is detected.

FIGS. 5 and 6 show timing charts of a local line transmitting operation and an extension transmitting operation when a tone signal is added.
Figures (a) through (d) correspond to Figures 3 (a) through (d), and Figures 6 (a) through (d) show Figures 4 (a) through (d).
Corresponding to Then, the tone signals shown in FIGS. 5 (e) and 6 (e) are transmitted in view of the fact that no tone is transmitted from the station since the DC connection has not been made yet when the off-hook is detected. From this moment when the tone signal picks up the handset of the telephone, the pseudo dial tone is passed through the handset until the first digit selection signal is input as the 400 Hz pseudo dial tone signal which is the same as the local dial tone. The user can hear and confirm the operation.

Incidentally telephone 3 ₁ ... is PB detection circuit in the case of the dial pulse detection circuit 8 ₁ ... is having a PB receiver tone dialing (PB) mode, i.e. becomes a selection signal detecting circuit, and the dial output circuit 6 with PB dialer It goes without saying that it is a selection signal sending circuit.

Although extension calling has to perform a single-digit selection signal may be addressed by more than two orders of magnitude of the selection signals, selection signals in the predetermined time t ₂ from the point of input of the last digit of the selection signals in this case the extension outgoing Of course, it is determined whether the transmission is an extension transmission or a local line (external line) transmission based on the presence or absence of the input.

[Effects of the Invention] The present invention relates to a telephone terminal device configured as described above, wherein a transmitting means for transmitting a selection signal to an office line, a hook state detecting means for detecting a hook state of the telephone, and a selection signal from the telephone are transmitted. Selecting signal detecting means for detecting, DC closing means for closing the DC circuit of the office line, and storing means for storing a selecting signal from the telephone, and selecting from the telephone detected by the selecting signal detecting means. The signal is stored in the storage means, and after the hook state detection means detects the off-hook, the selection detection means outputs the next selection signal within a predetermined time from the detection of the selection signal of the last digit of the number of digits corresponding to the local operation. When it is detected, the DC closing means is operated, and the selection signal data stored in the storage means is transmitted to the central office via the transmitting means. Control means for setting the local operation by restricting the DC closing by the DC closing means and the transmission of the selection signal data by the sending means when the selection signal is not detected, wherein the hook state detecting means turns off the hook of the telephone. After detection, a pseudo dial tone is transmitted to the telephone until the selection signal of the number of digits corresponding to the local operation is detected, so that local operations such as outgoing calls and internal calls can be performed using the same operating method. In addition, there is an effect that it is not necessary to perform an operation of transmitting "0" as in the related art, to close a DC of a line when transmitting an extension, or to transmit a selection signal to a station.

[Brief description of the drawings]

FIG. 1 is a circuit configuration diagram of an embodiment of the present invention, FIG. 2 is a flowchart for explaining the operation of the embodiment, and FIGS. 3, 4, 5, and 6 are timing charts for the operation of the embodiment. ,
FIG. 7 is a basic connection diagram of the telephone terminal device, FIG. 8 and FIG. 9 are flowcharts for explaining the operation procedure of the conventional example, FIG.
FIG. 11 is a timing chart for explaining the above operation. 1 ...... office line, 2 ₁ to 2 ₃ ...... extension, 3 ₁ to 3 ₃ ...... phone, 4 ...
... incoming detection circuit, 5 ...... DC閉結circuit, 6 ...... dial output circuit, 7 ...... exchange circuit, 8 _{1-8 3} ...... dial pulse detection circuit, 9 ...... call signal generating circuit, 10 ...... tone Signal generation circuits, 11 ... CPU, 12 ... memory.

Claims (1)

(57) [Claims] 1. A telephone terminal device for connecting a telephone to an office line, making an external call, and performing a local operation such as an extension call by a selection signal of a predetermined number of digits from the telephone, transmitting a selection signal to the office line. Sending means, a hook state detecting means for detecting a hook state of the telephone, a selection signal detecting means for detecting a selection signal from the telephone, a DC closing means for closing a DC circuit of the office line, Storage means for storing a selection signal, the selection signal from the telephone set detected by the selection signal detection means being stored in the storage means, and a digit corresponding to a local operation after the hook state detection means detects off-hook. When the selection detection means detects the next selection signal within a certain time after the detection of the selection signal of the last digit of the number, the DC closing means is operated and the selection stored in the storage means is performed. Signal data to the office line via the transmitting means, and if the selection detecting means does not detect the next selection signal within the fixed time, the DC closing by the DC closing means and the selection signal by the transmitting means. A control means for restricting data transmission and setting a local operation, wherein after the hook state detecting means detects a hook-off of the telephone, a pseudo dial tone is generated until a selection signal of the number of digits corresponding to the local operation is detected. A telephone terminal device for transmitting a message to a telephone.