JPS6132643A - Automatic camp-on system of trunk line incoming call - Google Patents

Abstract

PURPOSE:To prevent the ineffective holding of a trunk line by restting camp-on registration automatically unless there is an answer even if a terminal is called back for a specific time or by specific times when the originating terminal which enters a camp-on state is called back. CONSTITUTION:If the originating termianl A makes no answer when called back, no answer signal is sent back even after a link l4 to a terminal A calling circuit A2 is closed in a call-back incoming state, so a common controller CB monitors a call-back time of a specific time T and releases the link l4, trunks TA snd TB, and link l the specific time later. Then, call-back operation is performed at intervals of time T. The counter of a monitoring circuit for call-back time T and call-back frequency N is stored with the call-back frequency and when the terminal A makes no answer even after the call-back frequency attains to a specific value, the storage control circuit of a connection and storage control circuit (i) is actuated to erase infomation on the automatic camp-on registration of the terminal A in a device MB and also reset various control circuit in the common controller CB.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention temporarily suspends the connection when the called terminal (group) is busy when receiving a call from the trunk line (group), and (group)
An automatic camp-on system for incoming calls on a trunk line that automatically calls back the calling terminal (group) when the called terminal (group) becomes free. [Background of the Invention] Conventional trunk lines of this type In the automatic camp-on method for incoming calls, when the terminating station calls back the calling station after confirming the availability of trunk line(s) and called terminal(s), it first calls back the calling terminal(s). If the calling terminal is empty and the caller is absent when the calling terminal is called, the calling terminal may not respond and occupy the trunk line for a long time and continue calling, or may call back once. After a timeout on no response.

There was the inconvenience of having to be called back and timed out over and over again. Furthermore, in the conventional system, camp-on is automatically performed regardless of the caller's intention, so callers who do not intend to camp-on are unregistered (cancelled) each time.
This method has drawbacks such as the hassle of having to perform operations.

[Purpose of the invention]

The present invention eliminates the above-mentioned drawbacks of the prior art, and provides an efficient and easy-to-use relay that prevents the relay line from being held invalid when the calling terminal is unresponsive, and also eliminates the need for the caller to cancel camp-on registration. There is an automatic camp-on method for all incoming calls.

[Summary of the invention]

The present invention enables the called terminal(s) to receive a call from the trunk(s).
When calling back the calling terminal (group) that automatically goes into camp-on while busy, if the calling terminal (group) does not respond after calling back for a certain period of time, or if the calling terminal (group) does not respond a certain number of times, a refund will be given. In the case of repeated non-responses, the camp-on registration of the calling terminal(s) is automatically canceled, and this allows the relay line to be put on hold and calls to be made when the calling terminal(s) does not respond. This is an automatic camp-on system for incoming calls on trunk lines that prevents registration cancellation operations by the operator.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 is a relay system diagram showing an embodiment of an automatic camp-on system for trunk line incoming calls according to the present invention.

FIG. 2 is also a processing flow diagram.

In Figures 1 and 2, A is the calling terminal(s), B is the called terminal(s), and C is the called terminal(s). Special signal sending device, EXA- is the originating exchange, EXE is the terminating exchange,
TA and TB are the trunk trunks of each station, CA and CB are the common control devices of each station, MA and MB are the storage devices of each station, A1 is the terminal (group) A call circuit (terminal) when receiving a general call, and A2 is the call back circuit. This is the terminal (group) A calling circuit (terminal) when a call is received. Also, a = d are various control circuits in the common control device CA, where a is a call detection/terminal status monitoring circuit, b is a link setting circuit, C is a trunk selection/status detection circuit, net
This is a connection/storage control circuit including a connection control circuit and a storage control circuit. Same <e-j are various control circuits in the common control device CB, e is a trunk selection/state detection circuit, f is a link setting circuit, 1g is a trunk/terminal state monitoring circuit, h is a trunk/terminal vacancy judgment/call circuit, etc. A return control circuit, i is a connection/storage control circuit including a connection control circuit and a storage control circuit, and j is a callback time T/callback number N monitoring circuit. Also 11~
714 is a link within each station, and various symbols in MA and MB indicate the registered storage contents in each storage device. In Figures 1 and 2, when terminal A makes a call, the common control of the originating exchange EXA The call detection/terminal status monitoring circuit a in the device ('A) detects the call, further receives the called terminal information (number) CXt, and sends the called terminal information to the connection control circuit of the connection/storage control circuit d. (Number) CXt- Send.This causes the connection control circuit to switch to the trunk selection/status detection circuit c
A desired trunk TA is selected via ', and a predetermined link 11 is set and closed by the link setting circuit. Here, trunk TA is connected to terminal AX via link 11,
When calling terminal B in the destination exchange EXB, the trunk TA drives the trunk TB, activates the common control device CB, and transmits the called terminal information (number) CX from the common control device CA to the trunk TA, TBfi. Send by. Then, in the common control device CB of the destination exchange EXB,
An incoming call is detected from the trunk TB via the trunk selection/state detection circuit e, and the called terminal information (number) CX sent via the above is connected and stored from the trunk TB via the trunk selection/state detection circuit e. At the same time as the connection control circuit of i receives the information, the storage control circuit of the connection/storage control circuit 1 drives the storage device MB, reads out the stored contents, and displays the called terminal information (No. 11) corresponding to the CXtf terminal B number. It is determined that (OX=B), and a vacant called terminal (group) B is selected via the trunk/terminal status monitoring circuit g.

Here, if terminal B is vacant, link setting circuit f
The required link 12 is set up and closed via the terminal A, the incoming call connection is completed, and communication (call) between the terminal A and the terminal 8 is performed. However, if terminal B is in use, the connection of terminal B is temporarily suspended and the connection is made via the storage control circuit of connection/storage control circuit i.
Drives the storage device MB, reads out the registered storage contents, determines that the called terminal information (number) CX corresponds to the special signal sending device C number (connection information) (CX=C), and links the link setting circuit f. The required link 13 is set and closed via the link 13.

As a result, a special signal (sound) is linked to the special signal sending device C to notify the caller that automatic camp-on ζ will be roared! The calling terminal A hears this special sound and recognizes that the called terminal B is in use. Here, calling terminal A has its own terminal A number AX
Dial X and send it to the common control unit CB of the destination exchange BXB. At this time, if there is only one terminal (group) capable of automatic camp-on in the originating exchange EXA, the dialing of this terminal A number AXX is omitted. Then, the common control device CB receives the dial signal of the terminal number AXX, and sends a registration confirmation sound from the special signal sending device C to the terminal A. When the terminal A is restored in response to this, the link 11 and the trunk are connected. TA, TB and Link 13
At the same time, the storage device MB is recorded via the storage control circuit of the connection/storage control circuit 1 in the common control device CB, and the automatic camp-on from terminal A to terminal B is recorded in the storage device MB. The terminal A number AXX to be indicated is registered as a WT in automatic camp-on (AXX=WT).

At the same time, the memory contents, for example T=5 (minutes), are stored in the callback time T/callback count N monitoring circuit j.

Read N=5 and start callback monitoring. Here, the trunk/terminal availability determination/call return control circuit is driven, and the terminal A number AX is
The X-compatible originating station detects the availability of trunk TB and called terminal (group) B via trunk/terminal status monitoring circuit g,
When both become vacant, the storage control circuit of the connection/storage control circuit 1 is activated and the called terminal B number is indicated as the callback number from the storage device MB to the terminal A for the stored contents. The destination terminal A number AXX corresponds to the called terminal B number BXX (AXX=BXX), and the trunk TB in which the terminal A is accommodated and connected to the originating exchange is read out (AXX=BXX). and the trunk TA connected thereto, and sends the called terminal B number BXX as a call-back number via the trunk TB and TA, while setting and closing the link 12 via the link setting circuit f. Then, the common control device CA of the originating exchange EXA receives the called terminal B number BXX of the call-back signal through the trunk selection/state detection circuit C, and activates the storage control circuit of the connection/storage control circuit d. The called terminal B number BX of the recall signal of the stored contents is activated via the storage device MA.
X is the terminal A calling circuit (terminal) A2 when receiving a call back
The correspondence (BXX=p, 2) is read out, and the link 14 corresponding to the terminal A calling circuit (terminal) A2 at the time of call-back reception is set and closed via the link setting circuit. As a result, terminal A can recognize that it is a call back from called terminal B, and can display this fact to the calling party. If the common control device CA receives the terminal A number AXX, which is the general incoming number of the terminal A, instead of the called terminal B number BXX, which is the call-back number, the common control device CA receives the stored contents from the storage device MA. Terminal A number AXX is compatible with terminal A calling circuit (terminal) AI when receiving general calls (AX
X=AI) is read and the corresponding link 11 is set up and closed. However, in the case of the above callback, the terminal A number AXX is sent from the destination exchange 'f2XB to the callback number. Since it is converted into the call terminal B number BXX and sent, it is connected to the terminal A calling circuit (terminal) A2 when the corresponding call-back call arrives.

Here, if terminal A is able to respond, a response signal is sent from terminal A to link 14 and trunk TA when the caller answers.
TB and the link 12 to the terminal (group) B, and the connection control circuit of the connection/storage control circuit i receives this response signal via the trunk/terminal status monitoring circuit g in the common control device CB. As a result, the memory device f is controlled via the memory control circuit.
The terminal A number AXX in f1MB cancels the registration of the WT (AXX=WT) undergoing automatic camp-on registration, and at the same time, various control circuits 6-j in the common control device CB are also restored. However, if terminal A is unable to respond, a response signal will not be returned even after the link 14 to terminal A calling circuit (terminal) A2 at the time of callback reception is closed, so common control device CB A preset fixed time call back time T = 5 minutes is monitored, and after this 5 minutes, the link 14 and trunk TA, T
Release B and Link 12. After this, the trunk TB and the called terminal (group) B are monitored again via the trunk/terminal status monitoring circuit g at every fixed callback time T = 5 minutes until both 1-1 are vacant. If this happens, the link 14, the trunks TA and TB, and the link 12 are connected again in the same manner as described above, and the call is returned to the terminal A. At this time, the counter of the callback time T/callback number N monitoring circuit j indicates the second callback (N=N+1=2
) to remember things. Also at this time, if terminal A is unable to respond and no response signal is returned, the same operation as above is performed, and the callback time T and number of calls N monitoring circuit j is the third callback ( N=N+1=s). In this way, even when the number of callbacks is set to N = 5, if terminal A is unable to respond and no response signal is returned, the storage control circuit of the connection/storage control circuit l is activated, and the storage device MB is activated. Terminal A number AXX in is a WT in automatic camp-on registration (AXX = WT), and the registration of (AXX = WT) is automatically canceled.
A.

TB and link l12 are released, and the common control device C
Various control circuits e-j in B are also restored.

In the above embodiment, the case where the callback time T=5 minutes and the number of callbacks N=5 was explained, but since the memory setting in the storage device MB can be made variable, for example, the number of callbacks is 1'. When setting 1J=2 to 1, terminal A number AXX is automatically registered for camp-on after 2 to 1 non-response.
The registration of (AXX=WT) is canceled (cancelled)
be done. Further, in the above embodiment, one terminal A has been described, but a plurality of terminals (group) A can be similarly controlled.

As described above, according to the present embodiment, when a calling terminal (group) does not respond, the callback is performed according to the arbitrarily settable callback time T and the number of callbacks N, and if the calling terminal (group) does not respond, If so, the registration of the terminal (group) during automatic camp-on registration can be automatically canceled (cancelled), thereby preventing the trunk line from being held invalid when the calling terminal (group) does not respond. Also, at calling terminal A,
Terminal A calling circuit (terminal) A1 when receiving a general call, terminal A calling circuit (terminal) A2 when receiving a call back, terminal A number AXX when receiving a general call, and terminal of the call back signal when receiving a call back. Since it is activated by the signal of the B number BXX, it is extremely easy to use because the calling party can decide in advance whether to perform an incoming call operation after answering or to immediately perform a sending operation.

〔Effect of the invention〕

As explained above, according to the automatic camp-on method for incoming trunk line calls of the present invention, when a call is received from the trunk line (group), the calling terminal (group) is busy and automatic camp-on is activated. group), the automatic camp-on registration is automatically canceled (
This improves efficiency by preventing trunk lines from being held invalid, and also eliminates the need for the caller to cancel camp-on registration, making it easier to use. ,

[Brief explanation of the drawing]

FIG. 1 is a relay system diagram showing an embodiment of the automatic camp-on system for trunk line incoming calls according to the present invention, and FIG. 2 is a similar processing flow diagram. A... Calling terminal (group) B... Called terminal (group) C.
...Special signal sending device EXA to notify automatic camp-on...Originating station switch EXB...Destination station father switch TA, TB...Each station trunk line CA, CB...Each station common control device MA, MB ...Each station storage device A1...Terminal (group) A calling circuit (terminal) when receiving a general call A2...Terminal (group) A calling circuit (terminal) when receiving a call back call

Claims (1)

[Claims] 1. When the calling terminal (group) connects the called terminal (group) to the called terminal (group) of the terminating station via the trunk line (group), the called terminal (group) is in the middle of a call at the terminating station. In this case, after the connection is temporarily put on hold, if the called terminal(s) and the trunk line(s) become free, the terminating station connects the vacant line of the trunk line(s). In the automatic camp-on method for trunk line incoming calls in which the calling terminal(s) are automatically called back via the calling terminal(s), An automatic camp-on system for trunk line incoming calls, characterized in that if the calling terminal (group) does not respond after a call back, the temporary hold state of the connection is canceled. 2. The relay according to claim 1, wherein the signal when calling back to the calling terminal(s) is different from a general calling signal to the calling terminal(s). Automatic camp-on method for line incoming calls.