JPS5964952A - Electronic key telephone device - Google Patents

Abstract

PURPOSE:To eliminate the inconvenience to go to a ringing telephone for answering and to improve the efficiency of an electronic key telephone device, by having an answer of a central processor to a trunk line by dialing a specific number through an extension telephone having no ringing of an incoming tone to the trunk line. CONSTITUTION:When a trunk line L1 has an incoming, the extension telephones T2 and T1 have ringing and no ringing respectively. A CPU6 closes the switches of a ringing tone source circuit 3 and a switch circuit network 4 equivalent to a telephone. However, an operator of the telephone T2 leaves the seat and is impossible to give a reply. Here the operator of the telephone T1 picks up a handset and pushes a trunk line substitute answer number, e.g., 2. Thus the dial information is transmitted to the CPU6 via a telephone interface circuit 5. Then the CPU6 gives an access to an RAM7 and decodes the trunk line substitute answer of the dial information and finds out a trunk line L1 under an incoming state to close the switches corresponding to the telephone T1 of the row side and the trunk line L1 of the column side of the network 4. Thus it is possible to answer a call.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field to which the Invention Pertains] The present invention relates to an electronic key telephone device that has a built-in microprocessor in its main device and controls an extension telephone using a storage program method. In particular, the present invention relates to an electronic key telephone device having a proxy response function from a stand-alone extension telephone to a central office line.

[Description of prior art]

The key telephone device accommodates a plurality of office lines and a plurality of extension lines, and is configured to be able to interconnect these office lines and extension lines. If there are only a small number of extensions, the number may be configured so that a button telephone is connected to all the extensions and any central office line can be selected and connected from all the extensions. If the number becomes large, it would be wasteful to provide all extension telephones with a function for selectively connecting the central office line.

In other words, if a key telephone system is used in one company, only the extension telephone of the person in charge of answering calls during business hours of that company should be a key telephone, and the other extension telephones should be cheap stand-alone telephones. can do. In this case, when a call is received from the central office line, the person in charge of the telephone responds to the call, determines the connection destination, and switches the connection to the necessary extension. Also, when making a call from the extension of a standalone telephone to a central office line, raise the hand cent and dial the designated dial number for the central office line (e.g. "0") to select an empty central office line. I can do it.

With such devices, when the telephone staff leaves their desks after business hours, they will not be able to answer incoming calls from the central office line, even if some of the individual telephone extensions are occupied due to overtime work. . In order to respond to the central office line at this time, it is necessary to go to the extension to which the key telephone device is connected and respond.

In order to avoid this kind of trouble, methods such as fixedly connecting a plurality of office lines to each extension line are used when the telephone person is in office after business hours. However, if a call is received from the central office line in such a state, even if the individual telephone connected to the central office line that received the call can respond, it is impossible to respond from another individual telephone.

[Purpose of the invention]

The present invention solves these problems by making it possible for a stand-alone telephone connected to an extension line to respond on behalf of any central office line, so that the operator using the stand-alone telephone does not have to take the trouble to receive calls from the central office line. To provide an electronic key telephone device capable of eliminating the inconvenience and inconvenience of having to go to a standalone telephone or key telephone that is ringing and answer the central telephone line.

[Key points of the invention]

The present invention provides an electronic key telephone system in which, even if an extension telephone is not designated to emit a central office line ring tone, if a user dials a specific number after dialing a hand cent, the central processing unit automatically responds to the central office line. An electronic key telephone device that also enables the telephone to answer, and includes a plurality of extension telephones, a switch network connecting the telephone and a central office line, and a central processing unit that controls the switch network. By providing a circuit that is coupled to the central processing unit and stores a dial number for answering an incoming call on the central office line, even if the extension telephone is not ringing the office line ring tone, the number can be dialed by raising the hand cent. The present invention is characterized in that the control is performed so as to be able to respond to the central line by toggling the central line.

[Explanation based on examples]

Next, embodiments of the present invention will be described based on the drawings.

The figure is a block diagram of the main parts of an embodiment of the present invention.

In the figure, a plurality of office lines 1 are connected to the office line interface circuit 2.
are connected to each column of the switch network 4 via. ”
Each row of the switch network 4 is connected to a plurality of extension telephones 8 via a telephone ink face circuit 5. The central processing unit 6 transmits the switch circuit network 4 in response to requests for dial information or hook signals transmitted from the extension telephone 8.
The opening/closing operation is configured to control the opening/closing operation of the opening/closing operation. A temporary storage circuit 7 is coupled to the central processing unit 6 . -Special note↑7a The circuit 7 stores the office line proxy response number, office line ring tone designation, etc., and is accessed by the central processing unit 6 at any time. Also,
The ring tone source circuit 3 is connected to a row of switch circuits lli'l 4 and, if necessary, to an extension telephone 8 via a telephone ink face circuit 5.

With the above circuit configuration, when there is an incoming call on the -tlrth office line L1, the first extension telephone R1"1 will ring in response to the incoming call on the office line L1, and the second extension telephone will ring. Telephone
2 has a temporary record (Q
It is assumed that the memory of the circuit 7 is configured. Furthermore, it is assumed that a predetermined dial number "2" issued from the extension telephone is designated as the office line proxy response number.

The characteristic operation of the present invention will be explained.

If there is an incoming call to the office line L1, the extension telephone T1 is not ringing, but the extension telephone 'r2 is ringing. The central processing unit 6 closes the switches of the ring tone source circuit 3 and the switch network 4 corresponding to the telephone set. However, since the operators of telephones 1 and 2 are away from their seats, they cannot respond to the central office line L1 immediately.

When the operator of the telephone T1 raises his hand and presses the dial number "2", the dial information is transmitted to the central processing unit 6 via the telephone ink face circuit 5. The central processing unit 6 that received this is specially noted 1.1.
It accesses the circuit 7 and decodes that the information is a representative line response. This searches for the office line L1 that is currently receiving calls, and connects the telephone T1 on the row side of the switch network 4 and the office line L on the column side.
Close the switch corresponding to 1.

In this way, the telephone T that does not ring when receiving a call to the central office line L1
1 can also respond to local telephone calls.

〔Effect of the invention〕

As explained above, the present invention allows the operator of the extension telephone to answer the call on his/her behalf by dialing a specific number even if the ring tone from the central office line does not ring, and the operator of the extension telephone can answer the call on his/her behalf by dialing a specific number while he/she is present, even if the telephone operator does not hear the ring tone from the central office line. To provide an efficient key telephone device that eliminates the inconvenience of going to a ringing telephone and answering the telephone, and reduces the possibility that no one will answer an incoming call on a central office line.

[Brief explanation of drawings]

The figure is a block diagram of a device according to an embodiment of the present invention. 1... Office line, 2... Office line ink face circuit, 3...
... Ringing sound source circuit, 4... Switch circuit network, 5...
telephone interface circuit, 6... central processing unit, 7
...-Special note (Q circuit, 8...extension telephone. Patent applicant: NEC Corporation representative, patent attorney: Naotaka Ide

Claims (1)

[Claims] (1) A central office line interface circuit that accommodates a plurality of office lines, a telephone ink face circuit that accommodates a plurality of extension lines, and a central office line accommodated in the central office line ink face circuit and A central processing unit controls this switching circuit network, and a storage circuit controlled by the central processing unit is provided. In an electronic key telephone device configured to be connected to a standalone telephone without selection means for making a selection, the central processing unit and the memory circuit are configured to select a predetermined specific number from the standalone telephone when a call is received on the central office line. An electronic key telephone characterized by a configuration in which, when a specific number is dialed, the incoming central office line is connected to the individual telephone that dialed that specific number; 1;
equipment.