JPS63203040A - Selection signal system for facsimile store and forward exchange - Google Patents

Abstract

PURPOSE:To eliminate the need for sending a special additional signal from a caller by allowing a store and forward exchange to receive each call when a premises facsimile (FAX) terminal equipment is busy, identifying a call from a public network and an extension to discriminate the designation of destination. CONSTITUTION:If a FAX terminal equipment is busy, a premises exchange receives it in an extension B1, a line terminal T1 of a store and forward exchange (FMA) receives its call and responds to the premises exchange. The FMA awaits a premises display addition signal from a call terminal equipment after the reply. When the premises FAX terminal equipment accesses the FMA, the premises display addition signal is sent by the talking mode while the reply of the incoming call of the access number dial is confirmed. The operation by each FAX terminal equipment varies with some difference and a numeral 1 or a PB signal # is sent by the key operation. Since the incoming to the FMA need not to be known by the FAX terminal equipment of the public network, the premises display additional signal is not sent.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a control system for a facsimile storage and switch that is used by being connected to an extension of a private branch exchange, and particularly relates to a method for controlling a facsimile storage and switch that is connected to an extension of a private branch exchange. This invention relates to a route control system for facsimile communication calls that are relayed and sent to a receiving terminal.

(Prior Art) Regarding facsimile storage and switching machines for private branch exchange, it is stated on page 40 of Institute of Electronics and Communication Engineers Paper 5E81-49 that a completely separated type has excellent selectivity in facsimile storage services.

FIG. 2 is a circuit diagram showing a conventional control system for the above completely separated type facsimile storage and exchange machine.

In the figure, PBX is a private branch exchange, FM is a facsimile storage exchange, Fx and Fy are facsimile terminals (hereinafter referred to as FAX terminals) accommodated in the public network, respectively.
F1 to Fn are FAX terminals within the premises.

Each FAX terminal F1 to Fn is a private branch exchange PBX.
are connected to extensions A1 to An, and each FAX terminal Fx, Fy
etc. through the dial-in lines D1 to Dn and receive the message. In the facsimile storage and switching machine FM, each line terminal T1 to Tn is connected to a dial-in line D1 to Dn.
The extension lines Bl-Bn are connected to the respective extension lines Bl-Bn. Each line terminal Tl-Tn is set up using each FAX terminal Fl-Fn as a representative number, and when the FAX terminal is in terminal-1 to Fn, it receives a call from lines D1 to Dn, etc., and temporarily sends a message. I'm trying to accumulate it.

In the system shown in Figure 2, for example, when sending a message from a public network FAX terminal Fx to a premises FAX terminal Fl,
First, the operator of the FAX terminal Fx makes a call. When the FAX terminal F1 is busy, the operator of the FAX terminal Fx identifies the busy signal, disconnects the busy call, and automatically or manually places a new call to the FAX terminal F1. As a means to save the operator's time, when a call that arrives at FAX terminal Fl becomes busy, the private branch exchange PBX sends the extension AI corresponding to line DI while keeping the call that was busy on hold. A call is made to the facsimile storage/switching machine FM using the representative extension B1, and the extension number of the FAX terminal F1 of the extension A1, which has been received from the line D1 and temporarily stored, is sent to the facsimile storage/switching machine FM. A communication channel is established between the storage and exchange device and the FM, and the message is received. Facsimile storage and switching machine FM later became FA.
A call is made using the extension number of the X terminal F1, and the stored message is transmitted to the FAX terminal F1.

(Problem to be Solved by the Invention) However, in the above system, when a call is received from a FAX terminal accommodated in the public network to a FAX terminal in the premises via a private branch exchange and a facsimile storage exchange accommodated in the private branch exchange, In this case, the originating fax terminal first connects to the facsimile storage exchange using a dial-in method, and then uses a specific additional signal based on the PB double signal to contact the destination FA to the storage exchange.
This is not common as it requires inputting the extension number of the X terminal.

In addition, by dial-in method, F
When receiving a call to an AX terminal without going through a facsimile storage/switching device, it is conceivable that the private branch exchange automatically connects to the facsimile storage/switching device and temporarily receives the message as an alternative when the destination terminal is busy. In order to reconnect incoming incoming calls and automatically send the designated terminal number received from the public network to the facsimile storage and switching equipment as a dial-in number, a considerable amount of control software changes and additions are required, which increases costs. arise.

In order to solve the above-mentioned problems, the present invention has been made to automatically accept a call from a facsimile storage exchange when a facsimile terminal on the called side in the premises is busy, based on the conventional functions of a private branch exchange, and to The object of the present invention is to provide a control method that distinguishes between calls from the network and calls from extensions and determines destination designation.

(Means for Solving the Problems) In order to solve the above problems, the present invention accommodates a facsimile terminal in an extension designated by a designated extension number of a private branch exchange, and uses the designated extension number as a representative number. A line terminal of a facsimile storage and switching machine is accommodated in an extension of the facsimile storage and switching machine, and the facsimile storage and switching machine is provided with an extension number conversion table for correspondence between the line terminal and the designated extension number of the facsimile terminal, and the facsimile storage and switching machine For incoming calls that do not receive a local indication additional signal from the calling terminal within a predetermined period of time after the response, the designated extension number of the facsimile terminal corresponding to the line terminal is determined according to the extension number conversion table. as the designation of the destination of the incoming call, and for a call that has received the premise display addition signal, the destination network number sent from the calling terminal is acquired as the designation of the destination of the incoming call. I made it.

(Function) When a call is made from a public network or an extension, and the receiving facsimile terminal on the premises is busy, the call is received by the facsimile storage and switching equipment through the line terminal with the facsimile terminal as the representative number, and If you answer the incoming call and do not receive an additional premise display signal within a predetermined period of time, it is assumed that the call is from a public network, and the facsimile terminal is When the specified extension number is obtained as the destination of the incoming call and a premise display addition signal is received, it is assumed that the call is from an extension, and the specified extension number sent from the calling terminal is the destination of the incoming call. It is obtained as the specification of .

(Embodiment) FIG. 1 is a control circuit diagram of a facsimile storage and exchange machine showing an embodiment of the present invention. The facsimile storage and forwarding machine is an element of the same circuit as shown in FIG. 2, and is designated by the reference numeral FMA in the same figure, and is used in place of the facsimile storage and forwarding machine FM.

In the figure, the CPU is a main control unit that centrally controls the facsimile storage and exchange. MM is a memory unit that stores each program control signal and the like. IOC
is an input/output control unit, and CNS is a console for inputting commands such as maintenance.

MF is a message file in which the extension number conversion table is registered, and the position information received by each line terminal T1 to Tn is
It converts into subscriber numbers (extension designated numbers) of extensions A1 to An corresponding to dial-in lines D1 to Dn, respectively, and each line terminal Tl to Tn and each extension Al to An.
Individual correspondence tables have been registered.

LUI-LUn is a line unit, private branch exchange PBX
The signals from each extension 81 to Bn are sent to each line terminal T1 to T.
In response to this, network control and facsimile signal control are performed.

CCMI-CCMn are communication units that exchange facsimile message data with message file MF or exchange line unit LUI-LUn control signals with main control unit CPU. The VGC is a voice guidance unit that stores coded voice signals for providing guidance to each FAX terminal Fl to Fn, Fx, and Fy about procedures for inputting a communication service request signal, etc., and outputs the service. .

Next, the control operation of the circuit according to the combination of FIGS. 1 and 2 will be explained.

FIG. 3 is a flowchart showing an example of this control operation.

It is assumed that a message is sent from a FAX terminal Fx on a public network to a FAX terminal Fl on the premises. From the fax terminal Fx, F
When the dial-in number of the AX terminal Fl is dialed, a connection is normally made directly to the FAX terminal Fl via the private branch exchange PBX. Here, if the FAX terminal F1 is in a busy state, the private branch exchange PBX receives the call on the extension B1 whose representative number is the extension AI corresponding to the dial-in line DI, according to normal processing. Facsimile storage and exchange machine F
MA's line terminal T1 accepts the call. Referring to FIG. 3 below, when an incoming call signal to the line terminal Tl is detected, the loop is closed and a response is sent to the private branch exchange PBX (step Sl). This response is notified to the FAX terminal Fx by stopping the line reverse signal or ringback tone, and the FAX terminal Fx becomes ready for communication. The facsimile storage and exchange FMA waits for a certain period of time T, e.g. 2 to 3 seconds, after the response.
and waits for a local indication additional signal from the calling terminal. The on-premises display additional signal is sent by the on-premises FAX terminal Fl-Fn in the call mode after confirming the answer to the incoming call after dialing the access number when accessing the facsimile storage/exchange FMA. Although the operation of each FAX terminal differs slightly depending on the model, it is assumed that the number "1" or the PB double signal # is sent by key operation.Then, at Fx and Fy of public network FAX terminals, Since the FAX terminals Fx and Fy do not need to know about the arrival of a call to the facsimile storage/exchange FMA, they do not send out this additional private area display signal.

When the premise display additional signal is not received (S2), the facsimile storage/exchange FMA immediately sends out a called station identification signal similar to that when a call is received at a facsimile terminal (S8).
). If the additional premises indication signal is not received, it is generally due to the call being made from the public network, but due to an incorrect operation when making a call from within the premises, the additional premises indication signal may not be sent. A determination is made. The facsimile storage and switching equipment determines whether or not the originator's identification number (telephone number) has been sent as part of the facsimile procedure signal (S4), and if it has been sent, it also determines whether the identification number (telephone number) of the sender has been sent as part of the facsimile procedure signal. Referring to the list, it is determined whether the identification number of the sender is listed on the list (S5). If the call falls under the list, the call is terminated as an abnormal call (SO). If the call does not fall under the list, it is determined that the call is from outside the premises, and in this case and if the caller identification number is not sent in step S4, the incoming call is determined based on the extension number conversion table registered in the message file MF. line terminal T
The subscriber number of the FAX terminal Fl is found by searching using the location information of the FAX terminal Fl as a key (S7). Subsequently, a message transmission request signal is sent to the FAX terminal Fx (S8). When the message is transmitted, the facsimile storage/exchange machine FM receives and stores the message (S9). When the transmission is completed, incoming call termination processing is performed (S10). Thereafter, a call is made to the FAX terminal Fl using the retrieved subscriber number and the stored message is transmitted (S11).

Next, in step S2, when a premise display addition signal is received, it is assumed that the call is from a terminal within the premise, and in this case, no search is performed using the extension number conversion table. In this case, as part of the service request signal from the calling terminal in the premises, the above-mentioned identification number of the calling source, destination network number, service type designation number, etc. shall be transmitted sequentially as a PB signal. The same applies to SLL) and receives these (SL2). Furthermore, if necessary, during this transmission/reception, a voice guidance signal is sent out from the voice guidance unit VGC (the same applies to step 11). When the reception of the service request signal is completed, the reception and storage of the message, the transmission of the message, etc. are performed in steps 88 to Sll in the same manner as described above. In this case, when requesting to send a message in step S8, the receiving station identification signal or guidance such as pressing the start button for message transmission is sent to the originating terminal.

(Effects of the Invention) As explained above, according to the present invention, for each call, if the facsimile terminal in the premises is busy, the facsimile storage and switching system automatically operates based on the conventional function of the private branch exchange. Since the facsimile storage and switching equipment distinguishes between calls from the public network and calls from extensions to determine the destination, there is no need to send special additional signals from the calling side. , does not require any special modifications to the call processing functionality of the private branch exchange. Also, the dialing signal from the public network can use the same pulse-type signal as a conventional telephone.

[Brief explanation of the drawing]

FIG. 1 is a control circuit diagram of a facsimile storage and forwarding machine showing an embodiment of the present invention, FIG. 2 is a circuit diagram of a conventional control system of a facsimile storage and forwarding machine, and FIG.
3 is a flowchart of the operation of a circuit that is a combination of the circuits shown in the figure. PBX...Private branch exchange FMA...Facsimile storage exchange F1-Fn...Facsimile terminals T1-Tn...Line terminal MF...Message file (extension number conversion table)

Claims (1)

[Scope of Claims] A facsimile terminal is accommodated in an extension designated by an extension designation number of a private branch exchange, a line terminal of a facsimile storage exchange is accommodated in another extension whose representative number is the extension designation number, and the facsimile storage The exchange is equipped with an extension number conversion table for the correspondence between the designated extension numbers of the line terminal and the facsimile terminal, and responds to an incoming call to the facsimile storage exchange and returns the calling party within a predetermined time after the response. For calls that do not receive a premises display addition signal from a terminal, the extension number of the facsimile terminal corresponding to the line terminal is acquired as the destination of the incoming call using the extension number conversion table, and the premises display addition is performed. A selection signaling system for a facsimile storage/switching machine, characterized in that for a call that receives a signal, a destination network number sent from a terminal on the calling side is acquired as a designation of the destination of the incoming call.