JPH0246150Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention uses a two-wire standard telephone (hereinafter referred to as TWST) connected to the main unit via a pair of communication lines to communicate with outside lines such as central office lines. This invention relates to a telephone device that can set a person on hold.

[Prior Art] As a telephone device accommodating TWST, for example, a button telephone device is disclosed in Japanese Patent Application Laid-Open No. 1983-92694 filed separately by the present applicant.
During a call using the outside line stored in the main device and TWST,
When setting a hold state for an outside line and transferring it to another key telephone (hereinafter referred to as PBST), the TWST sends operation information to the main device, which is detected by the main device and sets the hold state. As this operation information, a method has been proposed that uses TWST hooking to open a call loop.

However, if the opening of the call loop due to hooking is detected as operation information, the dial pulse during dialing will also open the loop for approximately 66 msec. Despite this, it becomes impossible to make a dial call by setting a hold state, so the applicant has filed a separate application entitled "Standard Telephone Hold System for Key Telephone Devices" (patent application filed on December 20, 1982). Submission), it is determined whether the loop opening time matches the predetermined hooking time, and only if they match, the pending state is maintained, whereas if they do not match, the pending state is immediately released. Measures have been proposed.

[Problem that the invention attempts to solve]

However, even with the above-mentioned method, if a call is made by mistake during a call, the loop is detected as opening, and the hold relay repeats operation and recovery in response to the dial pulse, resulting in unnecessary relay operation. It has become a problem that arises.

[Means for solving problems]

In order to solve the above-mentioned problem, the present invention is constructed by the following means.

That is, in the above-mentioned telephone device, there is a determining means for determining the hooking time based on the detection output of the loop detection circuit provided in the main device, and a determination means for placing the currently active outside line on hold in response to the loop open detection output of the loop detection circuit. The system also includes a hold control means for canceling the hold state in response to the pseudo-hooking judgment output of the judging means, and a disabling means for disabling the detection operation of the loop detection circuit for a certain period of time in accordance with the pseudo-hooking judgment output. .

[Effect]

Therefore, the determination means determines whether or not it is a pseudo hooking according to the loop opening time, and if the result is a pseudo hooking, the suspension control means immediately cancels the suspension state, and the disabling means releases the loop. Since the detection operation of the detection circuit is disabled for a certain period of time, loop opening in response to dial pulses is not detected during this period, and unnecessary operation of the holding relay is prevented.

〔Example〕

Hereinafter, details of the present invention will be explained with reference to figures showing embodiments.

FIG. 1 is a block diagram showing the entire configuration. The main unit (hereinafter referred to as KSU) 2 accommodates an external line 1 such as a central office line from a central office or a telephone line from a private branch exchange.
The TWST 4 is connected to the PBST 4 through a pair of communication lines 3, and the PBSTs 7a to 7d are connected to each other via a pair of communication lines 5a to 5d and signal lines 6a to 6d.
is connected, and in KSU 2, a holding circuit (hereinafter referred to as HLD) 11 is connected to outside line 1 via contact h of hold relay H, while outside line 1 and call line 3 are connected to Between the contacts fe and TWST of the switching relay FE for external calls and internal calls,
A contact i of a sending relay I for sending each signal to the TWST 4, and a loop detection circuit (hereinafter referred to as LPD) 12 for detecting a call loop caused by the TWST 4 are inserted.

Furthermore, a ringing signal generation circuit (hereinafter referred to as RSG) 13 is connected to the make terminal side of contact i, which sends out a 16Hz ringing signal to TWST4 via contact bu of sending relay BU for sending busy tone. A busy sound generation circuit 14 for transmitting a busy sound to the TWST 4 is connected to the make pole side of the contact bu.

On the other hand, the communication lines 5a to 5d on the PBST7a to 7d side
are connected to the outside line 1 via contacts fa to fd of switching relays FA to FD, and in the operating state of each switching relay FA to FE,
The circuits of TWST4 and PBST7a to 7d are connected to an extension circuit (hereinafter referred to as INL) 15 for internal telephone calls, and a control circuit (hereinafter referred to as
CNT) 16 is the transmission circuit 17 and the signal line 6a
-6d to transmit and receive control data and operation data to and from PBST7a to 7d, and LPD
The HLD
11, RSG 13, INL 15, the relays FA to BU via the drive circuit 18, and the ring tone generating circuit 19 are controlled and exchanged.

The general operating condition is based on the above-mentioned JP-A-59-
As disclosed in Publication No. 92694.

FIG. 2 is a flowchart of the control situation by the processor in the CNT 16, assuming that the outside line 1 is being captured by the TWST4 of the relay "FE drive stopped" 101, and this is caused by the off-hook of the TWST4 and the subsequent Outgoing?”
102 according to the data in the memory, and if it is Y (YES), the "t ₁ timer" configured in the processor and set to a time t ₁ of, for example, 90 sec.
In addition to executing ``Start'' 111, ``Set the hold prohibition flag'' 112 into the memory is executed.

Next, according to the detection output of LPD 12, loop opening due to dial pulse is also detected.
“On hook?” due to detection time of less than 50msec
121, and in response to Y, execute `` <sub>t2</sub> timer start'' 122, which is set to a time <sub>t2</sub> of 1 second, for example, as described above, and check ``Hold prohibition flag set?'' 123, If this is N (NO), perform the relay “H drive” 131 and “I drive” 132, and connect HLD to outside line 1.
11 and set the hold state,
Connect TWST4 to RSG13.

However, at this time, the RSG 13 does not operate and no calling signal is sent.

Next, in accordance with the detection output of the LPD 12, check "Off-hook?" 141, and perform " _t2 timer reset" 142 according to Y of this, and then the time between steps 121 and 141 is, for example, 0.2. "Hooking?" 143, which coincides with the specified time of ~1.0 sec, is determined by a timer in the processor provided as a determination means. If this is N, it is pseudo-hooking, so relay "H, I drive stop" 144 is activated. , TWST 4 is connected to the outside line 1 again, the hold state is released, and a "t ₃ timer start" 145 with a set time t ₃ of 1 sec, for example, provided in the processor as an invalidating means is performed, and "t ₃ Timer time up? ”146
After becoming Y, steps 121 and subsequent steps are repeated.

Therefore, while step 146 is N, LPD1
The judgment in step 121 according to the detection output of step 2 is prohibited, and the detection operation of the LPD 12 is disabled only during this period.If the first dial pulse is detected, this state will be maintained for a fixed period of 1 second. , "0", until a maximum of 10 pulses are sent out, relays H and I will not perform unnecessary operations or restore.

Note that if step 143 is Y, it means that the hold operation is hooked, and the result is "hold completed".

In addition, in response to N in step 141, in accordance with " _t2 timer time up?" 151 Y,
The relay "FE drive/H, I drive stop" 152 is activated, and the outside line 1 is opened to "end the call."

On the other hand, if step 123 is Y, check "Off hook?" 161 in the same way as step 141, and according to this check, as long as " _t2 timer time up?" 162 is N, steps 161 and subsequent steps are repeated. , when step 162 becomes Y, the relay ``FE drive'' 163 releases the outside line 1, and the call is terminated.

In contrast to the above, when step 161 is Y, the dial pulse is being sent, and steps 121 and subsequent steps are repeated via " _t2 timer reset" 164, without proceeding to steps 131 and subsequent steps, and the setting is in a pending state. Do not do this.

Note that while step 121 is N, steps 121 and subsequent steps are repeated via N in " _t1 timer time up?" 171, and when step 171 becomes Y, "suspension prohibition flag reset" 172 is performed, The process moves to step 121.

Therefore, CNT16 is in step 101,1.
If the capture of the outside line 12 by the TWST4 is detected in step 02, the timer in step 111 is started in response to this, and the setting of the hold state is prohibited by the flag in step 112 until the timer times out. 1
Even if hooking by 41 is performed as operation information, this is not accepted as hold information, and steps 121 to 123 to 161 to 164 are repeated, and the hold state is not set by the dial pulse immediately after outside line 1 is caught. Become something.

Furthermore, even if a call is made by mistake during a call after Step 123 becomes N in Step 172, the detection operation of the LPD 12 will be disabled for the time _t3 due to Step 143 after N, as described above. , and since relays H and I maintain the restored state, relays H and I are prevented from operating and restoring unnecessarily in response to dial pulses.

However, the setting times t ₁ to _{t 3} can be determined according to the conditions, and can be used not only for button telephone devices but also for multiple devices.
It can also be applied to a telephone device in which only TWST is accommodated in KSU2.

Further, each timer may be provided separately, and the configuration shown in FIG. 1 can be arbitrarily selected according to the situation, and in FIG. You can replace the steps with the above steps, or omit unnecessary steps.
Various modifications are possible.

[Effect of idea]

As is clear from the above explanation, according to the present invention, even if a call is made by mistake during a call to an outside line, the hold relay, etc. does not need to respond unnecessarily, and this invention has a great effect on various telephone devices. can get.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, FIG. 1 is a block diagram of the entire configuration, and FIG. 2 is a flowchart of the control situation. 1...External line, 2...KSU (main unit), 3...Talking line, 4...TWST (standard telephone), 11...
HLD (holding circuit), 12...LPD (loop detection circuit), 16...CNT (control circuit), FA~FE, I,
H, Bu...Relay, fa~fe, i, h, bu...Contact.

Claims (1)

[Scope of utility model registration request] A standard telephone is connected to the main device that accommodates an outside line via a pair of communication lines, and the loop detection circuit of the main device detects the hooking information that comes from the standard telephone via the communication line, and detects when a call is in progress. In the telephone device that puts the outside line on hold, the outside line is placed on hold in accordance with the detection output of the loop detection circuit, and the outside line is placed on hold in response to the loop open detection output of the loop detection circuit. and suspension control means for canceling the suspension state in response to a pseudo-hooking determination output of the determination means; and disabling means for disabling the detection operation of the loop detection circuit for a certain period of time in accordance with the pseudo-hooking determination output. A telephone device characterized by: