JPH0334717B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is comprised of a main device connected to a central office line and a plurality of key telephones, and particularly relates to a key telephone device having a hold function.

In the hold operation of key telephones, when a call arrives at a central office line and the person who answers the telephone is not the person the caller wants to call, the call is temporarily put on hold while the person is being searched for or during a call. When the user wants the caller to temporarily wait for a call, the call line may be put on hold by pressing the hold button key on the key telephone. However, when the hold time is long, the person on the other end of the line gets tired of waiting and ends up hanging up, or the person on the other end of the line has to wait uncomfortably.

For this reason, conventionally, when the hold time has elapsed for a certain period of time, a hold alarm sound is sent to the key telephone to alert the person on hold. However, the person on hold was unable to contact the push button telephone on hold to inform them when the call would be hung up or to request that the call be released from hold.

The present invention has been made to solve this problem, and after a certain period of time has elapsed after a person is put on hold, a message sound source such as a voice synthesis IC installed in the main device sends a message to the other person on hold (for example, " Sorry to have kept you waiting. Please call me now with your voice.''), and after sending the message, the hold state is canceled to switch from the hold state to the speaker listening state, and the loudspeaker amplifier installed in the key telephone set By connecting the receiver to the telephone call circuit and transmitting the voice signal of the other party from the speaker via the amplifier, the person on hold is urged to respond. For this purpose, the key telephone comprises a main device connected to the central office line, a plurality of key telephones including a telephone communication circuit network and a reception amplifier, and has at least a group of telephone line switches for selecting the said telephone line and a holding function means. The device includes a message sound source circuit, a timer circuit that counts a certain period of time from the start of the hold until the message is sent, a group of sound source selection switches for sending a message to the held line, and a set of sound source selection switches for sending the message to the held line, and a button that connects the held line to the above button. means for connecting to the receiving amplifier of the telephone; and a central control section for controlling these operations; the control section detects a hold key press signal of the key telephone; and transmits a message to the central office line in response to a count-up signal of the timer circuit, and after the message transmission is completed, the call path of the held line is connected to the receiving amplifier of the key telephone. This provides a voice call system for people on hold.

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

FIG. 1 is a block diagram of a button telephone device showing one embodiment of the present invention, and FIG. 2 is a flowchart showing the operation of the portion of the key telephone device shown in FIG. 1 related to the present invention.

In Fig. 1, 1 is the main device, 2-1 or 2-
n is a button telephone; 3 is a central office line that forms a DC loop during hold and talk times, detects incoming calls from the central office line, activates the central control unit 4, and sends out dial signals to the central office line; Reference numeral 4 denotes a group of communication path switches for controlling data transmission and reception with the telephones 2-1 to 2-n, controlling and processing incoming signals from the office line circuit 3, controlling the sound source selection switch group 9, and selecting a line. 8, a hold sound source circuit 5 for sending music to the hold line while on hold; 6 a message sound source circuit for sending a message to the person on hold while on hold; 7-1 or 7-
n is the office line, 8 is the office line 7-1 for office line calls.
to 7-n and the telephone set 2-1 or 2-n; 9 is a group of sound source selection switches for sending hold tone or message to the held line while on hold; 10 and 10' are center switches; a data transmitting and receiving circuit that transmits and receives data between the control unit 4 and the telephone control unit 15; 11 is a communication circuit network; 12;
13 is an amplifier, 13 is a speaker, 14 is a key scan circuit including a central office line button, an extension button, a hold button, and a function button, which are not shown in the drawings; 15 is a key scan circuit that sends a key press signal from the key scan circuit 14 and a switch 17 to the main device 1 side. , a telephone control unit that controls a relay 16 that switches between the telephone network 11 and the amplifier 12, and controls a line status indicator lamp not shown in the drawings;
1 or amplifier 12;
17 is a switch, and 18 is a timer circuit. Reference numeral 19 denotes a bias potential applied to the cross point switches of the communication path switch group 8 and the sound source selection switch group 9.

Next, the operation will be explained with reference to the flowchart shown in FIG.

During a call on the office line 7, the operator of the telephone 2-1 first presses the office line button (not shown) on the key scan circuit 14 and turns on the switch 17. The signal and the ON signal of the switch 17 are detected, and the respective signal data are transmitted to the central control unit 4 of the main device 1 by the data transmitting/receiving circuits 10 and 1.
0'. On the other hand, the central control unit 4 of the main device 1 turns on the crosspoint switch A of the communication path switch group 8 for connecting the central office line communication path a and the telephone communication path b based on the signal from the telephone 2-1. .

Due to the above-described operation, the office line 7 and the telephone 2-
A communication path is formed between the main device 1 and the main device 1. Next, when the operator of the telephone 2-1 presses a hold button (not shown) on the key scan circuit 14, the telephone control unit 15 detects a hold activation signal from the key scan circuit 14, The data transmitting/receiving circuit 1 sends a hold signal to the control unit 4 of the
0 and 10'.

In response to the hold signal, the control unit 4 of the main device 1 first turns off the crosspoint switch A of the call path switch group 8 (step 31), and connects the sound source selection switch group 9 with the central office line for sending hold music. Crosspoint switch B is turned on (step 32), and the hold tone is sent from the hold tone source circuit 5 to the central office line (step 33). At this point, the hook switch 17 is lowered to turn it on. On the other hand, upon receiving the hold signal from the telephone 2-1, the central control section 4 activates the timer circuit 18 (step 34). After a preset certain period of time has elapsed, the timer circuit 18 sends a count-up signal to the central control section 4 (step 35), and this signal causes the central control section 4 to turn on the held music sending cross of the sound source selection switch group 9. Turn off point switch B (step 36), turn on crosspoint switch C for message transmission (step 37), start message sound source circuit 6 (step 38), and send hold tone to message tone to the central office line. Switch to

After sending the message (step 39), the central control unit 4 turns off the message sending crosspoint switch C (step 40), stops message sending, and disconnects the office line communication path a and the telephone communication path b. Turn on crosspoint switch A of communication path switch group 8 to be connected (step 41)
At the same time, a signal is sent to the telephone control circuit 15 via the data transmitting/receiving circuits 10 and 10' to put the telephone 2-1 into the speaker listening state.

On the other hand, based on the signal, the telephone controller 15 activates the TB relay 16 (step 42).

Due to the operation of the TB relay 16, the contacts of the relay
tb0 and tb1 are switched and the communication path is connected to the amplifier 12. At this time, the calling voice from the person on hold is amplified and transmitted from the speaker 13 of the telephone (step 43). In this state, if the telephone operator raises the switch 17, the telephone controller 15 detects an off-hook signal, restores the relay 16, and makes it possible to make a telephone call.

As explained above, according to the present invention, after the key telephone on hold sends a message to release the hold, the communication path is switched from the communication circuit network to the loudspeaker amplifier side, and the voice of the person on hold is amplified from the speaker and sent out. Therefore, it is possible to communicate intentions more smoothly, compared to the conventional key telephone device having a hold function centered on the person on hold, which has kept people on hold unnecessarily, and the practical effects thereof are extremely large.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a button telephone device showing one embodiment of the present invention, and FIG. 2 is a flowchart showing the operation of the portion of the key telephone device shown in FIG. 1 related to the present invention. 1... Main device, 2-1, 2-n... Key telephone, 3... Office line circuit, 4... Central control unit, 5...
Hold sound source circuit, 6...Message sound source circuit, 7...
... Office line, 8 ... Call path switch, 9 ... Sound source selection switch, 10, 10' ... Data transmission/reception circuit,
11...Telephone circuit network, 12...Amplifier, 13...
Speaker, 14... Key scan circuit, 15...
Telephone control unit, 16...Relay, 17...Hook switch, 18...Timer circuit, 19...Bias potential.

Claims (1)

[Claims] 1. A key telephone device consisting of a main device connected to a central office line, a plurality of key telephones including a telephone communication network and a receiving amplifier, and having at least a group of telephone line switches for selecting the line and a holding function means. , a message sound source circuit, a timer circuit that counts a certain period of time from the start of the hold until the message is sent, and a group of sound source selection switches for sending the message to the held line;
Means for connecting the held line to the receiving amplifier of the key telephone set and a central control unit for controlling these operations are provided, and the central control unit detects a hold key press signal of the key telephone set and detects the hold key press signal of the key telephone set, and Activate the selection switch group and the timer circuit, send a message to the local office line in response to the count-up signal of the timer circuit, and after sending the message, transfer the call path of the held line to the receiver amplifier of the key telephone set. A voice call method for a person on hold who is on hold.