JPH02122793A - Key telephone system - Google Patents

Abstract

PURPOSE:To eliminate the delay for a first incoming call, and to eliminate an effect on a line due to the push of an erroneous line selecting button by hooking off a key telephone set when the plural incoming call arrive, and responding to the calls according to the order of the calls. CONSTITUTION:Incoming signals successively arriving from a telephone line 3 are detected by an interface circuit 11 in main equipment 1, notified to a CPU 14, through which lines out of telephone lines 3 the signals arrive is arranged in order, a result is stored into a storage circuit 15, and call sounds are sent from a transmitting circuit 16 through a channel switch 13 and an interface circuit 12 to key telephone sets 21 to 2n. When an interface circuit 21 detects the call sound, the telephone sets 21 to 2n respectively ring the call sounds through a call sound receiving circuit 22 by a CPU 23, for example, when the telephone set 21 is hooked off, a hooking switch 24 is turned on, it is detected by the main equipment 1, the sending of the call sound to the telephone set 21 is stopped, the oldest telephone line is read from the circuit 15, and connected to an extension 4.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to key telephone systems.

[Conventional technology]

In traditional key telephone systems, when there are multiple incoming calls,
The button telephone set was configured to select one of the line selection buttons, which indicate incoming calls with a flashing indicator light, to answer the call, regardless of the order of incoming calls.

[Problem to be solved by the invention]

In the conventional key telephone system described above, when there are multiple incoming calls, the button telephone selects one of the line selection buttons, which indicate the incoming calls with a flashing indicator light, and answers them, regardless of the order in which the calls arrive. However, there are disadvantages in that a line that is already in use may be mistakenly selected, or the first incoming call may be left unanswered.

[Means to solve the problem]

The key telephone system of the present invention is a key telephone system comprising a plurality of button telephones, a plurality of telephone lines, and a main device accommodating the plurality of button telephones.
The main device includes a storage means for storing the order in which the plurality of incoming signals are received via the plurality of telephone lines, and when a ring tone is sent to the plurality of key telephones when a call is received, and an off-hook signal of the key telephone is detected. connection means for connecting an off-hook button telephone to only one of the telephone lines according to the order of incoming calls; each of the plurality of button telephones has a ring tone receiving means for receiving the ring tone;
and signal sending means for sending the off-hook signal to the main device when the device goes off-hook to respond to the ringing tone.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one practical example of the present invention.

In FIG. 1, the present embodiment includes a plurality of key telephones (hereinafter referred to as devices) 2, to 2fi, a plurality of telephone lines 3, and a plurality of telephone lines 3 and 2. 2n.

The main device 1 has an interface circuit (hereinafter referred to as INF) 11 that interfaces with a plurality of telephone lines 3 and TEL.
21 to 2n, an INF 12 that interfaces with a plurality of extensions 4, a call path switch (hereinafter referred to as SW) 13 that connects the telephone line 3 and the extension 4, and the order in which incoming signals from the telephone line 4 arrive. A memory circuit (hereinafter referred to as MEM) 15 that stores the information, a ringing tone transmission circuit (hereinafter referred to as O8C) 16 that transmits the ringing tone to the stations 21 to 2fi, and a central control circuit (hereinafter referred to as O8C) that controls the inside of the main device 1. 14 (referred to as CPU).

T E L 2 l is lN that interfaces to extension 4
F21, a ringing tone receiving circuit (hereinafter referred to as RG) 22 that receives a ringing tone and sounds it, a hook switch (hereinafter referred to as H3) 24 that detects off-hook of the handset, and a CPU 23 that controls the inside of the station 21. It is configured with

In addition, other locations except for location 21 are also available for location 2□ Since it has almost the same configuration as , illustration and explanation will be omitted.

Next, the operation of this embodiment will be explained.

The main device 1 detects incoming signals arriving one after another from the telephone line 3 through INFII, and notifies the CPU 14 of the signals. The CPU 14 ranks and stores in the MEM 15 the number of the telephone line 3 from which the call was received, and the O3C
16 to 5W13°I NF 12. A ring tone is sent to TEL 21 to 2fi through extension 12.

In the stations 21 to 2n, for example, when the lNF 21 detects the ring tone -, the CPU 23 causes the RG 22 to sound the ring tone.

Next, for example, when the TEL 21 off-hook the handset (not shown), the HS 24 turns on, and the CPU 23 detects this and transmits the off-hook signal to the lNF.
21, send to the main device 1 via extension 4.

In the main device 1, T E is sent from lNF12 via extension 4.
When an off-hook signal from L 21 is detected, the position 2. Stops sending out the ring tone, reads from the MEM 15 which is the oldest telephone line 3 that is sending an unanswered incoming call signal, and connects that telephone line 3 to the extension 4 from the station 21. The 5W13 is controlled in such a manner that the telephone line that responded is deleted from the MEM15.

With the above operations, T-EL 2 only takes the handset off-hook and responds to the oldest unanswered incoming signal.

Thereafter, in accordance with the order in which the other stations 2□ to 211 go off-hook, the CPU 14 connects the telephone line 3 to the off-hook station via the 5W 13 and the extension 4 in accordance with the order in which the incoming signals are received stored in the MEM 15.

In addition, if you want to make a call while receiving a call, press the call button (not shown) in the box and then off-hook the handset. The system stops sending out the ring tone to the 03C16, makes the dial tone go out from the 03C16, and connects the place from which the outgoing signal was sent through the 5W13 to the vacant telephone line 3 to enable dial input.

In addition, the ring tone after dialing is a different tone than when receiving a call, or a ring tone with a different interval.○5C
Call from 16.

〔Effect of the invention〕

As explained above, the present invention makes it possible to eliminate the delay in responding to the first incoming call and making the user wait by answering the calls in the order in which the key telephone goes off-hook when there are multiple incoming calls. Since a response is made only by going off-hook, it not only eliminates the effect on the line during a call caused by pressing the wrong line selection button as in the conventional case, but also has the effect of being able to respond quickly.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. 1...Main device, 21~2゜...Key telephone (position)
, 3...Telephone line, 4...Extension, 11.12...
Interface circuit (INF), 13... Call path switch (SW), 14... Central control circuit (CPU), 1
5... Memory circuit (MEM), 16... Transmission circuit (
0SC), 21...interface circuit (INF),
22...Ring tone receiving circuit (RG), 23...Central control circuit (CPU) 24...Hook switch (H
8).

Claims (1)

[Claims] In a key telephone system comprising a plurality of key telephones, a plurality of telephone lines, and a main device accommodating the plurality of button telephones, the main device determines the order in which a plurality of incoming signals are received via the plurality of telephone lines. a storage means for storing, and a connecting means for transmitting a ring tone to the plurality of key telephones when an incoming call is received and, when an off-hook signal of the key telephone is detected, connecting the off-hook button telephone to only one of the telephone lines according to the order of incoming calls; each of the plurality of button telephones has a ringing tone receiving means for receiving the ringing tone, and a signal sending means for transmitting the off-hook signal to the main device when going off-hook to respond to the ringing tone. A key telephone system characterized by: