JPH02134960A - Preferential call originating system - Google Patents

Abstract

PURPOSE:To eliminate the trouble of recalling by holding a call till the end of speaking at the time of receiving a call wait request signal and surely connecting the call at the time of the end of speaking of a called subscriber. CONSTITUTION:Channel devices consists of a switching network 10 which switches connection between devices, a subscriber circuit 15 which monitors the state of a subscriber, an originating register 13 which receives a dial signal, and an outgoing trunk 14 which transmits the signal to another exchange. When a first subscriber calls a second subscriber being in course of speaking with another subscriber, the call of the first subscriber is held till the end of speaking of the second subscriber, and the call is connected to the second subscriber preferentially to calls of the other subscribers at the time of the end of speaking. Thus, the calling subscriber is saved trouble to originate the call again when the called subscriber is busy, and the calling subscriber is surely connected to the called subscriber at the time of the end of speaking.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a priority calling system for a busy subscriber in call processing of an exchange.

[Conventional technology]

Traditionally, call processing in exchanges only sends out a busy tone to the subscriber who made the call to the busy subscriber, and does not notify the subscriber even if the called subscriber is no longer busy. or did not connect to the called party.

[Problem to be solved by the invention]

In the conventional switchboard call processing described above, a subscriber who has made a call to a busy subscriber has to call again and again until the subscriber is no longer busy, which is not only troublesome, but also at the same time. If a medium subscriber receives more calls than other subscribers, the probability of connection will be low;
There is a problem that no matter how many times you try to call, the connection will not be established.

An object of the present invention is to provide a priority calling system that eliminates the trouble of re-calling for a calling subscriber when the called subscriber is busy and reliably connects to the called subscriber when the call ends. It is to be.

[Means to solve the problem]

In the priority calling system of the present invention, the exchange is equipped with a means capable of receiving a signal from a subscriber while transmitting a busy tone to the subscriber;
When a subscriber calls a second subscriber who is on a call with another subscriber, a busy tone is transmitted to the first subscriber;
When a call waiting request signal is received from the second subscriber, the second subscriber
The call of the first subscriber is held on hold until the call of the subscriber ends, and when the call ends, the first subscriber is connected to the second subscriber with priority over the call of other subscribers. It is characterized by

〔Example〕

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an exchange system for explaining one embodiment of the present invention.

The exchange 100 is composed of a central control device (hereinafter referred to as CC) 12, a communication path control device (hereinafter referred to as SPC) 11 that controls communication path devices under the control of this CCl2, and communication path devices. . Communication path devices are switching networks (hereinafter referred to as NW) that switch connections between devices.
10, a subscriber circuit (hereinafter referred to as LC) 15 housed in this NWIO that monitors the status of the subscriber, an originating register (hereinafter referred to as OR) 13 that receives dial signals, and transmits them to other exchanges. and an outgoing trunk (hereinafter referred to as OCT) 14. Subscriber 1 is connected to LC15.

Similarly, the exchange 200 is composed of a CC 22, a 5PC 21 which is controlled by the CC 22 to control communication path devices, and communication path devices. The communication path devices are NW2O, LC30, 31, and OR,2 accommodated in this NW2O.
3 and incoming trunks (hereinafter ICT) received from other exchanges.
A busy tone trunk (hereinafter referred to as BTT) 25 to which a register (hereinafter referred to as REG) 26 for receiving information from the subscriber is connected, a busy tone trunk (hereinafter referred to as BTT) 25 that transmits a busy tone, and a calling subscriber It consists of a call waiting trunk (hereinafter referred to as CWT) 27, 28 that holds calls and an announcement device (hereinafter referred to as ANM) 29 that notifies subscribers by voice.LC
Subscribers 2 and 3 are connected to 30 and 31, respectively.

Exchange 100 and exchange 200 are 0GT14 and ICT2
4.

Next, the operation will be explained.

When subscriber 1 attempts to make a call to subscriber 2, the calling dial information is transmitted to OR13 via LC15 and NWIO. 5PCII receives information from 0R13 and 0GT
14. ICT24 receives this activation signal and 5P
Report to C21, SPC:21 will contact ICT24 and 0R23
Connect with.

5PC11 sends the information of 0R13 to 0R23 via the above route.
, the connection between LC15 and 0GT14 is established. 5
Upon receiving the information from 0R23, PC21 checks the status of LC30. Here, when subscriber 2 is talking with another subscriber and LC30 is busy, 5PC21 uses ICT24
and BTT25, and the busy tone is NW from BTT25.
2O, ICT24, 0GT14. It is transmitted to subscriber 1 via NWIO and LC45. When subscriber 1 receives the busy tone and dials a number indicating a call waiting request, this information is transmitted to BTT 25 through the reverse route to the above, and BTT 2
5 sends the received information to the REG 26. When the 5PC21 receives the call waiting request signal from the REG26, the ICT2
4 and CWT 27, and subscriber 1 connects CWT 27.
subscriber 1's call is held.

Further, when subscriber 3 makes a call to subscriber 2, this calling dial information is transmitted to OR23 via LC31 and NW2O. When 5Pc21 receives the information from 0R23 and confirms that LC30 is busy,
Connect the LC31 and BTT25. NW2O from BTT25.

When the subscriber 3 who receives the busy tone via the LC 31 dials a number indicating a request to wait for a call, this information is transmitted to the BTT 25 through the reverse route to the above, and the BTT 25 sends the received information to the REG 26. do. 5PC21 is REG26
When it receives a call waiting request signal, it first determines whether there is a subscriber waiting to make a call, and when it is confirmed that there is subscriber 1, it connects LC 31 and ANM 29 and sends the call to subscriber 3. After notifying that there is a subscriber waiting to make a call, the LC 31 and the CWT 28 are connected. Subscriber 3 waits after subscriber 1 if it is okay, or goes on-hook to release the connection between LC 31 and CWT 28 if it is not possible.

Next, when the subscriber 2 who was busy ends the call and goes on-hook, the 5PC2] immediately sends a calling signal to the subscriber 2. When subscriber 2 responds, 5PC2] is LC
30 and TCT24 are connected. As a result, subscriber 1
It becomes possible to talk to subscriber 2.

When the call between subscriber 1 and subscriber 2 ends, 5PC2]
determines whether there are other subscribers connected to the CWT waiting to make a call. CWT via subscriber 3, C3]
If the subscriber 3 is connected to the subscriber 28, the subscriber 3 and the subscriber 2 are connected in the same manner as described above.

Although the switching system of this embodiment shows an example of a two-station configuration with two switching equipment, it can also be implemented with three or more switching equipment or only one switching equipment, and if the calling subscriber is the same as the called subscriber. This can be done either in the exchange or in a different exchange.

〔Effect of the invention〕

As explained above, according to the priority calling method of the present invention,
The calling subscriber simply sends a call waiting request signal when the called subscriber is busy, and the connection is reliably established when the called subscriber ends the call, while also eliminating the hassle of having to call again and again. It has the effect of disappearing.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an exchange system for explaining one embodiment of the present invention. 1.2.3...Subscriber, 10.20...Switching network 1 to work (NW>, 1.1..2]...Speech path controller (SPC), 12.22...Central controller (C
C), 13.23... Outgoing register (OR>, ]4...
Out) - La', yri (OCT), 15.30.31...
Subscriber circuit (1-C), 2/I...Incoming trunk (ICT
), 25...busy tone trunk (BTT), 26...
Register (REG), 27.28...Call waiting trunk (CWT), 29...Announcement device (ANM)
), 1.00,200...exchange machine.

Claims (1)

[Claims] The exchange is equipped with means capable of receiving a signal from a subscriber while transmitting a busy tone to the subscriber, and when a first subscriber makes a call to a second subscriber who is talking with another subscriber, Set the busy tone to the first
When the call waiting request signal is received from the first subscriber, the first subscriber's call is put on hold until the second subscriber ends the call, and when the call ends, the call wait request signal is received from the first subscriber. A priority calling system characterized in that the first subscriber is connected to the second subscriber in priority over the calling of the second subscriber.