JPS6130477B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connection system for toll calls in an electronic exchange, and particularly to a priority connection system for incoming long distance calls.

Conventionally, the incoming call indication from the central office electronic exchange to the private electronic branch exchange simply sends out a ringing signal, and therefore the connection for long distance calls (including international calls) from the time the call arrives to the time the call is answered is interrupted. There was no priority service at all. Furthermore, even after answering, if the caller does not say where they are calling from, the attendant at the attendant will have no idea where the incoming call is coming from, and no service will be provided for incoming calls from far away. The current situation is that it is not possible.

SUMMARY OF THE INVENTION An object of the present invention is to provide a connection system that prioritizes connection to incoming long distance calls in a private branch exchange.

The priority connection method for long-distance incoming calls of the present invention first performs software control over the sending of paging signals from the exchange on the central office side, and sends out band information by having the PBX send regular information on the presence and absence of signals to the PBX side. Do it like this. On the other hand, in order to receive the call signal on the PBX side, a current detection circuit section detects the signal presence/absence information sent from the central office exchange and transfers the information to the pulse counter section, and the pulse counter section counts the pulses. This is performed by means for transmitting the information to the band identification circuit and means for transmitting the band information developed by the band identification circuit to the central control unit via the scanning device. Next, the central controller connects the long-distance call to the relay console with priority, and displays the band information on the relay console via the relay console controller.

Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 is a diagram of the relay system of the private branch exchange according to the present invention, and the central branch trunk is connected to the switch network SW.
Attendant station via COT and handler trunk OPT
ATT is accommodated and the switch network
A speech path control circuit SPC, a scanning device control circuit SCNCTL, and a relay console control device ATTCTL are provided for controlling the SW, central office line trunk COT, and relay console ATT. Furthermore, an information receiving and distributing device SRD is provided that transfers and distributes information between these control devices, central processing unit CC, and main memory device MM. In the present invention, information in the main memory device MM is stored in the SRD and under the control of the central processing unit CC.
It is displayed on the relay stand ATT via ATTCTL, and connects long-distance calls preferentially.

First, as a first embodiment of the present invention, consider a case where only local calls and long distance calls are to be distinguished. In this case, if the call is a local call, the exchange of the office that detected the incoming call will transfer the ringing signal waveform a shown in Figure 3 from the calling signal trunk RGT of the office shown in Figure 2 to the central office line trunk COT of the PBX. Send to. In Figure 2, first operate the calling signal sending relay T and transmit the station's FR signal to the PBX.
Send it to the side for 1 second. Station ringing signal generator
CRG → Ring trip relay FA of calling trunk CRG → Contact t of T relay → Office SW → Capacitor of PBX office line trunk COT → Input signal detection section (Here, the light emitting sections of the two photocouplers have opposite polarity. (Connected in parallel.) 1 → Constant voltage diode → Station SW → Resistor → -48V becomes the operating circuit. After 1 second, activate the ring signal pulse count relay S and monitor the ring trip on the PBX side. On the other hand, in the case of a long distance call, the T relay is activated.
Activate the S relay after 300mS. Next, restore the S relay again after 400mS. Then, it is operated again after 300 mS, and the signal b shown in Fig. 3 is sent to the PBX side. On the PBX side, an input signal detection section 1 and a detection signal output section (here, the light receiving sections corresponding to the light emitting sections of two photocouplers of the input signal detection section 1 are connected in parallel with each other with the same polarity.) Correctly detect the presence or absence of current. That is, when either positive or negative current exists, one of the photocouplers in the input signal detection section 1 and detection signal output section 2 in the trunk is operating, and when the signal from the station stops, the input signal detection section of each operates. 1 and the photocoupler of the detection signal output section 2 are restored. The counter section 3 counts the number of pulses of the calling signal from the station using the detection signal output section 2, transfers the information to the next band identification circuit section 4, and passes the information to the central processing unit CC through the scanning device control device SCNCTL.
Transfer band information to. In this way, based on the identification information sent from the station to the PBX side, whether it is a local call or a long distance call, the long distance call is connected preferentially, and the relay
CC → when connecting ATT and central office trunk COT
The identification information of whether it is a local call or a long distance call is sent to the ATT via SRD → ATTCCTL → ATT and displayed.

Next, as another embodiment of the present invention, a case will be described in which calls are divided into local calls and long distance calls, and long distance calls are separated into international incoming calls and bands 01...09 in more detail. The principle of this embodiment is exactly the same as that of the first embodiment, and the switching equipment of the office that detects an incoming call determines the number of pulses to be sent depending on where the call came from. Send the ringing signal as shown in the example. For example, if a call comes from band 09, nine pulses are sent to the PBX as shown in Figure 4.
send to the side. The following operation is completely the same as the first embodiment.

As described above, according to the present invention, by identifying whether the call is an incoming long-distance call or not, and automatically displaying the band number on the relay stand, the call is given priority over the incoming long-distance call or the local call. By doing so, it is possible to improve connection services.

[Brief explanation of the drawing]

Fig. 1 is a relay system diagram on the private branch exchange side according to the present invention, Fig. 2 shows an embodiment of the present invention, and is a trunk circuit diagram for transmitting and receiving a calling signal, Fig. 3a,
4b is a waveform diagram showing an example of a calling signal for a local call and a long distance call in the present invention, and FIG.

Claims (1)

[Claims] 1 A circuit that identifies the originating band of an incoming call and sends a ringing signal that distinguishes which band the long-distance call is from to the private branch exchange installed on the extension side of the station, and a circuit that sends this ringing signal on the PBX side. A long-distance incoming call characterized by comprising a receiving circuit, a circuit in which a long-distance call is preferentially connected to a relay console operator by the output of the receiving circuit, and means for displaying a band number on the relay console. Priority connection method for calls.