JPS5944830B2 - Outgoing connection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an outgoing connection system in a private electronic branch exchange.

Generally, in an outgoing connection in an electronic exchange, the analysis of selected digits is performed by a translator having a digit expansion tree structure.

Since the translator is indexed by the caller's connection type (single call or call with a held call, etc.) and the selected digits dialed by the caller, it is possible to provide different services for the same connection type, for example, a single call. are assigned different selection numbers depending on each service.
Traditionally, services provided by exchanges were assigned special numbers or other selected digits to distinguish them from incoming calls to regular telephones, and it was customary for callers to consciously dial the special number when receiving the service. ing.

However, when dialing a specific telephone such as an executive telephone (such as a telephone with a particular extension subscriber class, or an extension telephone that is frequently used), it can be troublesome if the number of dials is large.

Also, even if a frequently used destination phone number is registered as a speed dial, the selected digits (dial number "o'~'9"
゛) is the special number, and the subscriber must dial ``゜Special number + abbreviated code''. In the past, such operations were considered to be unavoidable, but the present invention focuses on the above-mentioned problems, and in order to solve the problems, a subscriber who makes a call using a telephone is transferred to a switchboard. The purpose of this system is to allow calls to be received on a designated telephone by dialing only abbreviated digits that are independent of the special numbers used within the system. In order to achieve the above object, the present invention provides a private electronic branch exchange that connects to a predetermined called subscriber by speed dialing after a general subscriber sends a signal for starting a service. A telephone is provided, and the private electronic branch exchange performs a speed dial service when it directly receives a speed dial code without pressing a button due to a call from the telephone, and performs a normal connection when it receives a dial after pressing a button. It is characterized by

The present invention will be explained in detail below.

FIG. 1 is a system configuration diagram of an electronic exchange to which the present invention is applied.

In Figure 1, SuB is a telephone, EXG communication path formation network, LC is a subscriber circuit, LSCN is a subscriber scanning device, and ORT is a telephone with a function to read button pressed/unpressed information when a call is made from a telephone. outgoing register trunk,
TSCN is trunk scanning device, CC is central control device, M
EM indicates a storage device. Now, if the button-equipped telephone SuB, which is an executive telephone, makes a call without pressing the button, the central control unit C
C detects the loop in the subscriber circuit LC via the subscriber scanning device LSCN, reads out the corresponding calling subscriber information from the storage device MEM based on the location where the caller is accommodated, and confirms that the caller is the button-equipped telephone SuB. know.

Next, the central control unit transmits a call register trunk 0RT which has a function of detecting button press/unpress information of the button-equipped telephone.
is connected to via the network EXG, information on which buttons have not been pressed is read via the trunk scanning device LSCN, and stored in the storage device MEM as information for analyzing the received selection number. Next, the caller at the button telephone SuB dials the abbreviated digits after confirming the dial tone, and the central controller CC receives the abbreviated digits through the calling register trunk 0RT and stores them in the storage device. When the central controller CC confirms that all digits have been received, it determines a numeric analysis table based on the extension class of the subscriber information corresponding to the caller's storage location in the storage device MEM and the previously stored button information. When the extension class of the caller is an executive telephone and the call is made without pressing the button, the number analysis table for when the button is not pressed (not pressed) provided in the storage device MEM for the subscriber is extracted and the received abbreviated digit is used. After determining the incoming telephone number, well-known incoming call processing is performed. How the above-described button press/unpress information is detected will be explained with reference to FIG.

FIG. 2 is a circuit diagram of a button-equipped telephone SuB, a subscriber circuit LC, and an outgoing register trunk 0RT having a function of identifying button pressed/unpressed information to which the present invention is applied.

The HOOK in the button-equipped telephone SuB in FIG. 2 is a switch that opens and closes in conjunction with the on/off hook operation of the handset, and is closed when the telephone is in use (off-hook).

P indicates a button, and the diagram shows the button in an unpressed state, and when button P is pressed, diode D is connected to the circuit. LR in the subscriber circuit LC is a line relay that detects the subscriber circuit loop when the telephone SuB picks up the handset. CO is a cut-off switch, which is opened to protect line relay LR after detecting a subscriber circuit loop. t1 and T2 in the transmission register trunk 0RT are switches that invert the A and B lines, and T is a switch t1 and T2.
AA is a relay for forming a loop with the telephone, and Aa is a switch that is driven when a loop occurs in relay AA. When the button telephone SuB makes a call, the central control unit Cc detects a loop in the subscriber circuit LC and connects the telephone SuB to the calling register trunk 0RT.
The loop detection relay LR of the subscriber circuit is released by opening the cut-off switch CO. Next, central controller C
c drives relay T 1 and switches switch T and T2 to A line earth air and B line battery before moving to number reception processing,
The point corresponding to switch Aa is scanned via scanning device TSCN. If the caller does not press button P at this time, a loop is formed consisting of battery (T) - relay AA - switch T2 - hook switch HOOK, button P - switch t1 - relay AA, battery (to), and relay AA operates. Therefore, the switch Aa closes, and the central control unit Cc outputs the scanning result 0.
'' is detected and it is determined that button P is not pressed.If the caller presses button P, a loop is not formed by the diode D1 circuit and relay AA does not operate, so switch Aa is in an open state. And the scanning result is ゞI'',
It is determined that the button is pressed. After detecting the button information, the central control unit Cc restores the relay T and transfers control to normal number reception processing.

The button-equipped telephone shown above is generally used for special public electricity services, etc., and if you make a call without pressing the button, it will call the relay stand operator, and if you make the call by pressing the button, it will call the relay stand operator. It is treated the same as a regular telephone. The present invention makes it possible to use the above-mentioned telephone as an executive telephone or a telephone having a specific service class and directly dial the abbreviated digits to receive a call to a destination telephone corresponding to the abbreviated digits.

FIG. 3 shows a configuration diagram of a numeric analysis table used in an embodiment of the present invention when a button is not pressed.

In the figure, TA is a subscriber registration table, TB is a numeric analysis table, and DNO~, is an abbreviated digit-incoming telephone number exchange table. As explained earlier, when the central control unit Cc receives the abbreviated digits from the telephone SuB whose button has not been pressed, it indexes the subscriber registration table TA based on the accommodation location information EN of the button-equipped telephone SuB and is linked to this table. Extract the numerical analysis table TB.

Furthermore, the central control unit Cc obtains an abbreviated digit-incoming telephone number exchange table in which the telephone number of the destination is registered by indexing using the abbreviated digit CO'' to ゜92 received from the button telephone SuB. Although the embodiment described above has been shown in which the destination is an extension telephone number, it is also possible to register a calling number via a central office line or dedicated line and a telephone number outside the own private branch exchange.

Here, to explain again with reference to Fig. 1, when a button is pressed to make a call from the button-equipped telephone SuB, the central control unit Cc determines that there is button press information and calls all digits as in a normal general extension call. After receiving the data, it is expanded by a conventional selective digit expansion tri-structure translator, and thereafter normal connection operations are performed.

When making a call without pressing the button of the present invention (unpressed state), the degree of freedom in selecting the receiving party of the button-equipped telephone is up to 10 subscribers (abbreviated numbers ゞ0'' to ゞ9''). number 1
If you use multiple digits instead of just one digit, the degree of freedom in selecting the recipient will increase.

Additionally, the exchange can inform the caller using the button telephone that it is ready to accept abbreviated digits in the following manner.

FIG. 4 shows a transition diagram of dial reception, which distinguishes the state depending on whether the button is pressed or a button is not pressed.

In Figure 4, A indicates the state in which the telephone is empty, mouth indicates the state to which the telephone transitions when a button is pressed to make a call, and C indicates the state to which the telephone transitions to when a call is made without pressing the button on a telephone with button. . When the exchange detects in the call register trunk 0RT that the call is from a telephone with a button and the button has not been pressed, it sends a receivable tone DT (connected for general calls).
Connect another receivable tone SVT that is different from the state (state C).

By distinguishing the receivable tones based on button press/unpress information in this manner, the caller can confirm before dialing whether the caller is in a state where an individual code is accepted or a general call is being made.

As explained above, according to the present invention, the operation is easy because the call is received by directly dialing the abbreviated digits from a specific telephone such as an executive telephone without dialing a special number, etc. Since the correspondence between the abbreviated digits and the destination can be arbitrarily set for each call, service quality as an executive telephone is improved.

[Brief explanation of the drawing]

Fig. 1 is a system configuration diagram of an electronic exchange to which the present invention is applied, and Fig. 2 is a telephone with a button to which the present invention is applied, a subscriber circuit, and a calling register trunk having a function to identify button press/unpress information. FIG. 3 shows a configuration diagram of a numeric analysis table used as an embodiment of the present invention, and FIG. 4 shows a transition diagram of a dial reception state. SuB...Telephone with button, LC...Subscriber circuit, EXG...Network for route formation, 0RT...Equipped with button information reading function. Call register trunk, LSCN...Subscriber scanning device, TSCN...Trunk scanning device, Cc...
...Central control unit, MEM...Storage device,
P...Button, T...Switch T, and T
2 drive relay, T,, t2...Switch for reversing the A and B lines, TA...Subscriber registration table, TB...Number analysis table , E.N.
...Telephone accommodation location information, DNO~9...
...Abbreviated digit-incoming phone number exchange table.

Claims (1)

[Claims] 1. In a private electronic branch exchange that connects a specified called subscriber by speed dialing after a general subscriber sends a service start signal, a specific subscriber is provided with a telephone with a button, and the private electronic branch exchange This outgoing connection method is characterized in that when a speed dial code is directly received without pressing a button in a call from a telephone with a button, a speed dial service is performed, and when a dial is received after pressing the button, a normal connection is performed.