JPS63177692A - Trunk line incoming system in private electronic branch exchange - Google Patents

Abstract

PURPOSE:To make the incoming call of a dialing system arrive at an optional telephone set by terminating the incoming call to an extension telephone set, which is located in a storage position to meet an extension designating signal, while referring to the table of a storage device. CONSTITUTION:When an extension signal is transmitted from a station, a multifrequency signal analyzer 4 analyzes this signal and informs an information to a central control device 5. The device 5 refers to the table, in which the number of the extension designating signal, stored in the storage device 8, and the storage position of the extension telephone set are made to correspond to each other, and it finds out what extension telephone set the incoming call of the direct dialing should be terminated to. Then, it connects the extension telephone set in the storage position to a ringing device 7 through a terminal supervisory equipment 2, and rings a bell. When the extension telephone set is off-hooked, the device 5 disconnects the device 7, and builds up a channel through a dial-in line and a channel switch 6.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a central office line terminating system in a private electronic branch exchange capable of providing dial-in services.

(Prior Art) A conventional central office line termination system in this type of private electronic branch exchange has a configuration as shown in FIG.

That is, 11-1.11-2. .=, 11-n is an extension telephone, 12-1.12-2. ..., 12-n
are extension telephones 11-1, 11-2゜..., 11-n
Terminal monitoring device that monitors each, 13-1゜13-2
．． ..., 13-n is a trunk monitoring device that monitors the trunk, and 14 is a multi-frequency signal analysis device that analyzes the extension designation signal sent from the station. Reference numeral 15 denotes a central control unit, which controls the call path switch 16 to connect each extension telephone to each other and to the trunk and multi-frequency signal analysis device 14 through the trunk monitoring bag @13, and also connects the extension telephone 11 to the ringer. 17. 18
is a storage device that stores the extension number, housing position, etc. of the extension telephone 11.

Next, to explain the operation of the above conventional example, first,
When the trunk monitoring device 13 detects an incoming call from the dial-in line, it notifies the central control device 15. When the central control bag 115 receives this notification, it forms a communication path between the dial-in line and the multi-frequency signal analysis device 14 via the communication path switch 16, and selects a P for receiving the extension designation signal.
! Make preparations. Next, when an extension designation signal is sent from the station, the multi-frequency signal analyzer 14 analyzes this signal.
The information is notified to the central control device 15. When the central control unit 15 finishes receiving the dial information of the required number of dial digits.

The dial-in line and multi-frequency signal analysis bag created earlier [
14, the extension telephone whose extension number matches the received dial number is notified of the incoming call through the terminal monitoring device of that telephone, and is connected to the ringing device 17 to ring the extension telephone. ring. Therefore, when you pick up the handset of the extension telephone, the central control unit 15 disconnects the ringer 17, forms a call path via the dial-in line and the call path switch 16, and controls the incoming call. finish.

(Problems to be Solved by the Invention) As described above, in the conventional system, the number of the extension designation signal sent from the station must correspond to the extension number as is, and Since it is not possible to specify the signal number, if you receive a new number for a dial-in line from the central office, please use the numbering plan (
(subscriber data), which requires a lot of effort and time, and requires effort from the person using the telephone extension of the private electronic branch exchange to get used to the new numbering system. there were.

In view of this, it is an object of the present invention to enable an incoming dial-in call to be received at any telephone set without changing the extension numbering plan.

(Means for Solving the Problems) Therefore, the present invention stores a table in which the numbers of extension designation signals correspond to the accommodation positions of extension telephones in a storage device, and stores an extension designation signal sent from one station in a table. The central control unit refers to the table stored in the storage device and causes the extension telephone located at the accommodation position corresponding to the number of the extension designation signal to make an incoming call.

(Function) Since the extension designation signal sent from the station is used to make an incoming call to the extension telephone located at the accommodation position corresponding to the number of the signal, the number of the extension designation signal received from the station is used to make an incoming call. dial any phone you want to receive calls without
Incoming calls from the in-line can be received. Therefore, there is no need to change the numbering plan.

(Example) Figure 1 shows an example of the present invention, 1-1.1-2゜-=
, L-n is an extension telephone, 2-1.2-2. −． 2-n is a terminal monitoring device, 3-1.3-2. ..., 3-0 is a trunk monitoring device, 4 is a multi-frequency signal analysis device, 5 is a central control device, 6 is a communication path switch, 7 is a ringing device, and 8 is a storage device. In the storage device 8, as shown in an example in FIG.
A table is recorded that records the correspondence between the extension designation signal number and the accommodation position of the extension telephone.

First, when the trunk monitoring device 3 detects an incoming call from the dial-in line, it notifies the central control device 5.

Having received this notification, the central control device 5 forms a communication path between the dial-in line and the multifrequency signal analysis device 4 via the communication path switch 6, and from the 0 station prepares to receive the extension designation signal. When an extension signal is sent, the signal is analyzed by the multi-frequency signal analysis bag@4, and the information is sent to the central controller 5.
to notify. When the central controller 5 finishes receiving the dial information of the required number of dial digits, it disconnects the communication path between the previously formed dial-in line and the multifrequency signal analyzer 4. Then, based on the number of the received extension designation signal, the central control device 5 refers to a table that is recorded in the storage device 8 and associates the number of the extension designation signal with the housing position of the extension telephone, and then dials the number. The extension telephone to which the incoming call is to be received is found out, and the extension telephone at the accommodation position is connected to the ringing device 7 via the terminal monitoring device 2 to ring the bell. When the extension telephone picks up the receiver, the central control device 5 disconnects the ringer 7, forms a communication path via the dial-in line and the communication path switch 6, and completes control of the incoming call.

(Effects of the Invention) As described above, in the present invention, the central control unit receives an extension designation signal sent from one station by referring to a table stored in a storage device, and then selects an extension that is located at a storage position corresponding to the number of the extension designation signal. Since this system allows the telephone to make incoming calls, when receiving a new number for a dial-in line from the central office, there is no need to change the numbering plan of the private electronic branch exchange; Effort and time for changing plans are unnecessary.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is a table showing an example of correspondence between extension designation signal numbers and extension telephone housing positions, and Fig. 3 is a conventional central office line incoming system in a private electronic exchange. FIG. 5... Central control unit, 8... Storage device. Patent applicant Matsushita Electric Industrial Co., Ltd. Figure 1 1-1.1-2. ""', 1-n ・Nm吃5IIjA
2-1.2-2. −・, 2−n °= #J gourd R fatigue M
3-1.3-2. ..., 3-n trunk fold fold 1 Figure 2 Figure 3

Claims (1)

[Claims] A table in which the numbers of extension designation signals correspond to the housing positions of extension telephones is stored in the storage device, and the central control unit refers to the table stored in the storage device when receiving the extension designation signals sent from the station. A central office line incoming call system in a private electronic exchange, characterized in that an incoming call is made to an extension telephone located at a housing position corresponding to the number of an extension designation signal.