JPS62239786A - Nighttime operation system for dial-in circuit - Google Patents

Abstract

PURPOSE:To eliminate the need for a control line for nighttime blocking by retrieving a connection destination in a storage device corresponding to a dial-in line where there is incoming while ignoring an extension specifying signal re ceived from the dial-in line at the time of the nighttime switching of a private branch exchange, and then connecting said destination. CONSTITUTION:If there is an incoming signal to one of trunk line trunks TRK 8a, 8b,-8m from a public network 10 through the dial-in line in daytime, it is connected to one of telephone sets 1a, 1b,-1n. This connection with the telephone set is controlled by receiving the extension specifying signal by a register REG 9 from the public network 10 and bringing a SW 7 under the control of a central controller CC 11. When there is an incoming call from the dial-in line to one of the TRKs 8a, 8b,-8m in nighttime, the CC 11 ignores the extension specifying signal received by the REG 9 and reads connection destination information corresponding to the trunk line trunk stored in a storage device MEM 12 to control the SW 7, thereby performing connection control. Consequently, the control line for nighttime blocking can be omitted.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a nighttime operation system for dial-in lines.

[Conventional technology]

Conventionally, when operating dial-in lines at night, a control line was installed for each representative group of dial-in lines housed in a private automatic branch exchange, and when the line was closed at night, Jiki was sent out from this control line, and the public network side Some dial-in lines were blocked and the remaining dial-in lines were set up as ring-down connections.

(Problems to be solved by the invention) In the above-mentioned conventional dial-in line continuous use system at night,
It is necessary to install a control line for night-time blockade for each representative group, and since the dial-in line becomes a ring-down line during night-time switching, there is a drawback that the connection method must be changed on the exchange side.

[Means for solving problems]

The nighttime operation system of the dial-in line of the present invention includes a storage device that stores the connection relationship with a night reception desk or a night-only telephone, etc. for the dial-in line, and an extension designation signal received from the dial-in line at the time of night switching. It has a function to search for a connection destination from the storage device and establish a connection in response to an ignored dial-in line.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

In FIG. 1, telephone 1'', *1 be~1n
are subscriber circuits (hereinafter referred to as LC) 2a, 2b, ~
It is connected to a communication path switch (hereinafter referred to as SW) 7 via 2n. The public network 10 connects central office line trunks (hereinafter referred to as TRK) 8a and 8b via dial-in lines.

~8m, these TRK8a, 8b, ~
Connected to 8m 48w 7. The night-only telephone 3 and night reception desk 5 used during nighttime operation are each L.
C4, SW via reception desk controller (hereinafter referred to as BC) 6
I am trying to connect to 7. An extension designation signal from the dial-in line is received by a register (hereinafter referred to as REG) 9 via SW7. Further, a central control unit (hereinafter referred to as CC) 11 and a storage device (hereinafter referred to as MEM) 12 that control the entire exchange are connected to the SW 7.

Next, FIGS. 2 and 3 are diagrams showing the state of the connection line 11 between the central office line trunk and public transportation in FIG. 1, respectively.

Next, the operation of this embodiment will be explained.

In FIG. 1, when a call is received from public network 1o to TRK 8a, 8b, ~8m using the dial-in line during the day, telephones 1a, 1
b, to 1n. To connect to this telephone, use the REG extension designation signal sent from public network 1o.
CCI 1 controls SW7! Continued! lJ
It is carried out by controlling the

Next, at night, when a call is received from the public network 10 using the dial-in line to any of TRKs 8a, 8b, ~8m, connection control with the public network 10 is performed using the same connection method 1 as during the daytime.
The CC 11 ignores the extension designation signal received at the REG 9, reads the connection destination information corresponding to the office line trunk stored in the MEM 12, and controls the SW 7 to control the connection.

At this time, the connection destination information stored in the MEM 12 is not limited to the nighttime telephone 3 or the nighttime reception desk 5, and may be of general telephones 1a, lb, to 1n.

〔Effect of the invention〕

As explained above, the present invention ignores the extension designation signal sent from the dial-in line during nighttime operation of the local automatic switchboard, and sends the extension to the predetermined 1@I destination stored in the storage device. By connecting, @ during the day and at night.
There is no need to change the connection system, and one line for nighttime blockades can be removed, which has an economical effect.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG.
The third [521] is a diagram showing the connection procedure 0 line state between the central office line trunk and the public network in FIG. 1, respectively. 1a, 1b, ~1n...Telephone, 2a, 2b. ~2n, 4... Subscriber circuit (LC), 3...
...Night-only telephone, 5...Night reception desk, 6
...Reception desk controller (BC), 7...
・・Communication path switch (SW), ga, gb, ・・8
m... Central office line trunk (TRK), 9...
・Register (REG), 10...Public network, 11
...Central control unit f (CO), 12...Memory device (MEM). Introduction 1 Illustration 2 Illustration

Claims (1)

[Claims] In a private automatic branch exchange that accommodates a dial-in line to which an extension designation signal is sent when a call is received from a public network, a storage device is installed to store the connection relationship with a night reception desk or night-only telephone, etc. for the dial-in line. The system is characterized in that when the private automatic branch exchange switches over at night, the extension designation signal received from the dial-in line is ignored, and a connection is made by searching for a connection destination from the storage device in response to the incoming dial-in line. Nighttime operation method for dial-in lines.