JPS63200661A - Trunk line incoming reply connecting system - Google Patents

Abstract

PURPOSE:To contrive the improvement of service and instantaneously by constituting the titled system so that a trunk having a ring down circuit is started in a specified exchange by a calling signal so as to minimize the number of operators. CONSTITUTION:When a trunk line incoming call is given to a private branch exchange (PBX) 1 from a general public network, a controller CTL 1 calls a subscriber trunk IF by a calling signal from a ringing trunk via a switch SW 1 and the calling signal RNG is transferred from the subscriber trunk LIF to a ring down incoming line trunk RDICT in the PBX 2. When the calling signal RNG is detected by the ring down incoming line trunk RDICT, the incoming display is applied to an attendant board ATT by the controller CTL 2 via the switch SW 2. Then the normal station incoming service is executed by the attendant board ATT afterward.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a central office line incoming call response connection system in a private branch exchange network including two or more private branch exchanges, and particularly to a case where a private branch exchange is added. This invention relates to a central office line incoming call response connection system which eliminates the need to install a relay stand in a private branch exchange, and displays incoming central line calls to that private branch exchange on a relay stand in another existing private branch exchange.

[Conventional technology]

Until now, as described in Japanese Patent Application Laid-Open No. 607109364, when calling a terminal housed in an exchange other than the exchange where the call was received, the called terminal was connected by a dedicated line trunk. By sending out and calling the number, incoming calls from the central office line are connected to the called terminal. When connecting between exchanges, the exchange that received the call from the central office always answered the call.

[Problem that the invention seeks to solve]

By the way, when adding a switch to an existing private branch exchange network, a relay board is installed in that switch, and incoming calls to the central office line to that switch are answered as described in the above publication. When processing is performed, various problems occur. In other words, not only is an operator and an operator room required for the relay stand, but also
When another exchange is called as a result of transferring an incoming call, it takes a long time to reach the called terminal. In a private branch exchange network, it is desirable to place repeaters as centrally as possible in specific exchanges, and to display incoming calls on central office lines to any particular exchange on the relay console in that specific exchange. It is.

Therefore, an object of the present invention is to provide a central office line incoming call response connection system in which a central office line incoming call to an exchange can be directly transferred and terminated to any specific exchange having a relay stand.

[Means for solving problems]

The above purpose is to enable a direct call to a device having a subscriber circuit interface in the exchange by receiving a central office line call to an exchange having a central office line trunk, while depending on the calling signal from the device, a ring-down circuit may be called in a specific exchange. This is accomplished by activating a trunk with .

[For production]

=3- Regardless of whether or not a relay board is installed in an exchange with a central office line trunk, when a central office line call is received, a manual direct switching circuit or an extension device preset by the direct inline service is used. It is possible to call. Although the extension device in this case is not considered an extension telephone, it is said to have a subscriber circuit interface, so the call signal to the extension device is transferred by ring-down method to a specific exchange equipped with a relay stand. In this case, in a specific exchange, the ring-down trunk is activated by the ringing signal, and an incoming call is displayed on the relay stand.

〔Example〕

The present invention will be explained below with reference to FIGS. 1 and 2.

First, the private branch exchange network according to the present invention will be explained.
The figure shows the simplest network configuration. In this case, the private branch exchange consists of a private branch exchange PBX2 with a relay board ATT and a private branch exchange PBXI without a relay board, and PBXI A- is a central office line incoming trunk C0ICT1 for the general public network.
It is connected via. Also, PBXI,
The two are connected by a subscriber trunk LIF and a ringdown line trunk RDICT.

In this example, the incoming call from the general public network to the PBXI is to be transferred directly to the relay board ATT in PBX2 and displayed as an incoming call.For this purpose, the incoming call trunk C01CTI for the central office line must be registered in advance for direct inline service. It has become something that has been done.

Now, assuming that the PBXI receives an incoming call from the general public network to the central office line, the control device CTLI calls the subscriber trunk LIF via the switch SWI with a paging signal from the ringing trunk. The ringing signal RNG is to be transferred to the ringdown personnel line trunk RDICT in PBX2. If the ringing signal RNG is detected on the ringdown human line trunk RDICT,
A switch S is connected to the relay stand ATT by the control device CTL2.
The incoming call will be displayed via W2. From then on, normal station-arriving services will be provided at the relay stand ATT.

Next, referring to FIG. 2, we will explain the ringdown circuit that detects an incoming call based on a paging signal. This is what is shown. From the time of ■, the subscriber trunk (L IF)
When a call is started, the A-line battery and the B-line battery are turned off and on, respectively, and depending on whether the B-line battery is turned on, the B-line battery corresponding monitoring point G is turned on. Following this, the calling signal RH is 0N.
10FF is repeated, but 0N10 of the calling signal RH
Depending on the FF, the calling signal monitoring point R3 is also 0N10.
It is designed to be FF. According to the 5CAN information, the B line battery compatible monitoring point G is in the ON state, and the control bag fi (
CTI2) is capable of recognizing incoming calls. To prevent erroneous recognition due to noise, an incoming call is generally recognized when the ringing signal monitoring point R3 is turned 0N10FF twice or more.

The present invention is as described above, but if the PBX2 is equipped with a central office line incoming line trunk and a subscriber trunk, and the PBXI is equipped with a relay stand and a ring-down personal line trunk, the Of course, incoming calls from the central office line can be displayed on the PBXI. In any case, 2 or more P
We will centrally install relay stations only on the necessary BXs,
When a PBX in which a relay stand is installed and another PBX are connected in a ring-down manner, the PBX in which a relay stand is installed can display an incoming call on the central office line.

〔Effect of the invention〕

As explained above, according to the present invention, the relay board mounting P
Since the PBX connected to the BX does not require a relay stand and provides central office line incoming calls, the number of operator personnel can be kept to a minimum and centrally deployed, and communications to operators can be centralized. This not only improves speed and responsiveness, but also provides benefits such as not requiring much time to call the called terminal.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the network configuration of the simplest example of a private branch exchange network according to the present invention, and FIG. 2 is a diagram for explaining the operation of a ring-down circuit that detects incoming calls from a paging signal. be. PBXI, PBX2...Private branch exchange, SWI, S
W2...Switch, C0ICTl...Local line incoming line trunk, LIF...Subscriber trunk, ATT...Relay stand, CTLl, CTL2...Control device, RDICT
...Ringdown human line trunk. Agent Patent Attorney Tadashi Akimoto Figure 1 Figure 2

Claims (1)

[Claims] A central office line incoming call response connection system in a private branch exchange network including one or more private branch exchanges, which has a central office line trunk and is not equipped with a relay stand. While a device with a defined subscriber circuit interface is directly called, depending on the paging signal from the device, a trunk with a ring-down circuit is activated in a private branch exchange equipped with an attendant, and then the attendant receives an incoming central line call. A central office line incoming call response connection system characterized by display.