JPH0430693A - Connection confirming signal processing system by trunk re-selection - Google Patents

Abstract

PURPOSE:To decrease number of times of failed dialing by allowing both stations to hold and acquire again a trunk when the dialing takes place simultaneously or a connection confirmation signal is not received by a line fault. CONSTITUTION:When an extension 2b of a station A makes dialing of a selection signal for talking with an extension 14c of a station B and an extension 14b of the station B makes dialing of a selection signal for talking with an extension 2c of the station A simultaneously, a central controller 11 of the station A and a central controller 20 of the station B discriminate it to be the occurrence of collision and read incoming/outgoing priority of respective trunk groups from an incoming/outgoing priority memory 10 of the station A and an incoming/outgoing priority memory 19 of the station B. When the class of trunk hold is given by dialing from the station A and the class of bypass is given by dialing from the station B, a central processing unit 11 of the station A awaits the arrival of a connection confirmation signal from an opposite station succeedingly and the class of trunk bypass is given to the dialing from the extension 14b of the station B.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a connection confirmation signal processing system, and more particularly to a connection confirmation signal processing system for reselecting a trunk in the event of a collision between outgoing and incoming calls if a connection confirmation signal is not received.

[Conventional technology]

Traditionally, when the connection confirmation signal processing method of this woodcutter could not be received from the other party, or when there was a conflict between the outgoing and incoming calls, the central control unit in the electronic exchange would perform timer-out processing or handle outgoing/incoming calls. [Problem to be solved by the invention] The above-mentioned conventional connection confirmation signal processing method makes the caller listen to a busy tone or a restriction tone as a process. If the incoming calls collide, the connection confirmation signal from the other party cannot be received, the connection confirmation signal reception timer times out, and the caller is then unconditionally forced to listen to the busy tone or restriction tone. Because of this, there is a drawback that if the call fails, you will not be able to call back.

[Means to solve the problem]

The connection confirmation signal processing method based on trunk reselection according to the present invention has a digit storage memory that stores dialed numbers corresponding to the caller's accommodation location in the central control unit, and a digit storage memory that stores dialed numbers corresponding to the caller's accommodation location, and a digit storage memory that stores dialed numbers corresponding to the caller's accommodation location. When a call collision occurs for each trunk group, it is determined whether to disconnect the trunk and acquire another trunk, or to wait until the other party disconnects without disconnecting. The system is equipped with a call/call priority memory, and when it fails to receive a connection confirmation signal from the game player, it captures it, reselects the trunk on the same route as the friend trunk, and restarts the game.

[For production]

According to the present invention, it is possible to prevent a call processing failure when a connection confirmation signal from a game player cannot be received.

〔Example〕

The figure is a relay system diagram showing an embodiment of a connection confirmation signal processing system using trunk reselection according to the present invention. In the figure, 1 is the switch of A station, 2a to 2C are the extensions of A station,
3 is the center of station A, 4 is the register of station A, 5m, 5b
and 5C is the trunk for B station at A station, 6 is A
A trunk group, T is a B trunk group, 8 is a digit memory 8m, 8b+~, and a selection signal dialed for each terminal accommodation position is stored in this digit memory 8a,
a digit storage memory stored in 8b~ and accessed by the central processing unit for retransmission when connection confirmation signal reception fails;
is equipped with counters 9m, 9b, and ~, which count the number of times a call has failed in response to an unaccommodated location, and only when a predetermined threshold is exceeded, the caller is restricted from receiving a busy tone of 1 yuan. A call failure counter used as a guide for sending sound,
10 is memo 1, 110a.

10b, a call priority memory for indicating whether to wait for a connection confirmation signal from the trunk holding 1 game or to reacquire by detour in the event of a call collision for each trunk group;
1 is a central control unit equipped with the digit storage memory 8, a call failure counter 9 and a call priority memo +710;
12aj 2b and 12e are trunks within the A office leading to the B office, 13 are switches of the B office, [4a, 14b and 14
c is the extension of station B, 15 is the register of station B, 16 is the sender of station B, and 17 is the digital memo! 717m, 17b, ~
This digital memo is equipped with a ratio selection signal that can be dialed for each terminal storage position! Digit storage memory is stored in 717a and 17b and accessed from the central control unit when connection confirmation signal reception fails; 1B is empty 111m and 18b.
, ~, the system counts the number of times a call fails in response to an unaccommodated location, and plays a busy tone or restriction tone to the caller for the first time when a predetermined primary threshold is exceeded. The call failure counter used as a guide, 19, is a memo! 719
m, 19b, ~, for each trunk group, in the event of a call collision, a call priority memory indicates whether to hold the trunk and wait for a connection confirmation signal from the opposite side or to reacquire by detouring; 20 is the above-mentioned digit storage memo IJ; 17 , a central control unit comprising a call failure counter 18 and a call priority memory 19;

Next, the operation of the connection confirmation signal processing method using trunk reselection with the above configuration will be described. First, extension 2JL of A station is connected to extension 14 of B station via trunk 5g for B station - A trunk group 15 - trunk 17 m for A station.
A call is in progress with station A, and the extension 2b of station A is trying to make a call to the extension of station B, and the extension 14b of station B is trying to make a call to the extension of station A. In this state, extension 2b of station A
to make a call to the extension 14c of station B and dials a selection signal, the central control unit 11 of station A analyzes it and sends the selection signal to the 8-station extension in the digit storage memory 8 of this central control unit 11. 14c, the trunk 5b and the sender 3 are captured, and a connection N acknowledgment signal from the B station is awaited. At the same time as this process 1, in station B, extension 14b of station B is 1$ out of station A's 2
When a user makes a call and dials a selection signal to talk to station B, the central processing unit 20 of station B analyzes this selection signal,
This selection signal is sent to the extension 2 of station A in the digit storage memory 17.
stored in the digit memory corresponding to the storage position of C, and
It captures the trunk 12b and sender 16 and waits for a connection confirmation signal from the A station. When such a force operation occurs simultaneously at stations A and B, trunk 5b and trunk 12b are in a state of waiting for a connection confirmation signal from 1;ff'-Nanasakari station .rho., etc. Then, within a predetermined time common to stations A and B, a connection confirmation signal is transmitted from the trunk 5b of the A station to the central controller 1ii11, and from the trunk 12b of the B station to the central controller 1120. In this case, the central control device 11 of the A station and the central control device 20 of the B station determine that a transmission collision has occurred, and set the transmission failure counter 9 of the A station and the transmission failure counter 18 of the B station, respectively, to correspond to the terminal accommodation position. The counter is set to r+lj L, and the call priority of each trunk group is read from the call priority memory 10 of the A station and the call priority memory 19 of the B station. This incoming and outgoing call priority must be set at both ends of the trunk group, and one must be given a class of waiting for connection confirmation by trunk hold, and the other must be given a class of waiting for another trunk by trunk detour. Many. That is, in trunk group 6, if a call from station A is given a trunk hold class and a call from station B is given a detour class, then the central processing unit f!
At t11, the game continues to wait for a connection confirmation signal from the game player to arrive via the trunk 5b. Then, extension 14b of station B
The central control unit 20 detects that the connection confirmation signal has not been received, and at the next point in time, the call is given a trunk detour class. 12b and the sender 16 of the B station, capture the register 15 of the B station as shown in the figure, connect the path between the trunk 12b of the B station and the register 15 of the B station, and send a connection confirmation signal. The order is output to the trunk 12b of the B station. And the central control frame via the trunk 5b of station A! When the reception of the connection confirmation signal is reported at t11, the central control unit 11 issues a number sending order to the sender 3. When the sender 3 receives this order, it sends a selection signal to the B station via the trunk 5b of the A station. For this reason, at station B, the signal is received by the register 15 via the switch 13, and then analyzed by the central controller 20.
After calling extension f4c, at station B, the central controller 20 calls extension 14.
b reads out the numeric information from the digit storage memory 17 and searches for a detour route.

That is, it captures the A-circulating trunk 12c and the sender 16, connects the communication path between the intra-office A trunk 12e and the sender 16, and issues an outgoing order to the intra-office A trunk 12c. This call initiation by the B station is analyzed by the central controller 111 of the A station via the intra-B trunk 5c of the A station. The central control unit 11 of this A station captures the register 4 in order to receive the selection signal from the B station, and this register 4
The communication path of the intra-office B trunk 5c is connected to the intra-office B trunk 5c, and an order for sending a connection confirmation signal is issued to the intra-office B trunk 5c. This B trunk group 7 includes the B intra-office trunk 5c.
The connection confirmation signal sent via the A-to-office trunk 12e'jz is analyzed by the B-station central control frame t20, and then the central control unit 20 outputs a selection signal sending instruction to the sender 16. This selection signal is trunk 1 within the A office.
2e, the B trunk group 7, and the intra-office B trunk 5c, and are analyzed by the central control device 11 of the A office. Therefore, the communication path between the register 4 of the central control unit 11 of the A station and the intra-office B trunk 5e is disconnected, and the communication path between the called extension line 2c and the intra-office B trunk 5c is connected, and the communication becomes possible.

In addition, in the recovery processing of these series of calls, the central controller f11 of the A station and the central controller 2o of the B station store the digit storage memories 8 and 17, the call failure counters 9 and 18, and the call priority memories 10 and 19, respectively. clear. Also, in case the extension 14b of the B station causes a call collision on the A-circulating trunk 12e, the outgoing call failure counter 1B of the central control unit 20 of the B station will be decreased and the call will be detoured to the next trunk group. If the number of calls exceeds a value predetermined by the system, a busy tone or a restricted tone can be played to the caller at each station.

〔Effect of the invention〕

As explained above in a fraudulent manner, according to the connection confirmation signal processing method using trunk re-selection pressure according to the present invention, if calls occur simultaneously, connection confirmation signals cannot be received due to line failure.
- If both stations hold and reacquire the trunk, how many times will the call fail? The effect is that it can be reduced.

[Brief explanation of the drawing]

The figure is a relay system diagram showing an embodiment of a connection confirmation signal processing system using trunk reselection according to the present invention. 1...A station switch, 2jL~2e...
Extension of A station, 3...Sender of A station 4...A
Station registers, 51 to 5c... Trunk for B station, 6... A trunk group, 7... B trunk group, 8... Digit storage memory, 9...
... Call failure counter, 10... Call priority memory, 11... Central control unit, 12&~12e...
・Trunk for A station, 13...Switch for B station, 1
4a to 14e...Call extension of B station, 15...Register, 16...Sender 17...Digital storage memory, 18...Call failure counter, 19...
...Call priority memory, 20...Central control unit. Patent applicant Masaki Yamakawa, Representative of NEC Corporation

Claims (1)

[Claims] In the connection confirmation signal processing method of a program storage type private electronic branch exchange, when a connection confirmation signal from the other side cannot be received, the trunk on the same route as the captured trunk is reselected and the game is restarted. A connection confirmation signal processing method using trunk reselection, which is characterized by preventing failure of outgoing processing due to non-reception of a connection confirmation signal.