JPS5820499B2 - Inter-office missed transfer method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connection processing system for exchanging connection information between offices in a call forwarding service between offices of a telephone exchange.

The connection processing methods for conventional inter-station forwarding services can be roughly divided into the following two types.

One is that if the called extension subscriber has registered call forwarding with another station when receiving a call from the calling station, the incoming call is relayed (tandem connection) to the registered call forwarding station, and the call is registered as call forwarding. This is a system in which call forwarding registration destination number information is sent to the destination station, and the call forwarding destination station connects the incoming call to the subscriber to whom the call forwarding is registered.

The other method is a so-called common line signaling method in which connection information and various service function information between offices are transferred between offices through a special line provided separately from a general telephone line, and the connection is controlled.

However, each of these has the following drawbacks.

In other words, in the former method, the telephone line used for incoming calls from the originating station to the receiving station is separate from the telephone line used for sending various information from the receiving station to the originating station.
The number of redundant relay connections for telephone lines (trunk lines) decreases, and the latter method requires a special line for the common line signaling system in addition to the telephone line, and its control becomes complicated, resulting in economical problems. This is not desirable as it results in an expensive system configuration.

The object of the present invention is to provide an inter-office missed transfer system that eliminates the above-mentioned drawbacks.

In other words, it is an object of the present invention to provide an inter-office missed call transfer system that does not require the use of a common line signaling system and has high efficiency in the effective use of telephone lines.

That is, the system of the present invention not only does not use a special line, but also allows incoming call connection and information transmission and reception between the originating station and the receiving station to be performed using a single communication line.

That is, in the inter-office call forwarding system of the present invention, in a connection processing method of inter-office connection information in the inter-office call forwarding service of a telephone exchange, there is an incoming call connection from a calling station to an extension subscriber registered for call forwarding at a receiving station. In this case, the extension subscriber's absent registration display information and call forwarding destination number information edited at the receiving station are sent from the register sender device to the originating station through the line used for the incoming call connection, and the originating station This method is characterized in that the line is restored after receiving the transmitted information, and further the connection is reconnected based on the received information.

To explain the configuration of the above-mentioned method of the present invention in more detail, the editing of the two pieces of information is performed by a supporting device (such as a marker or a memory unit) of the receiving station, and the register sender is not used in conventional devices. Unlike the above, it has sufficient capacity to send out the above two pieces of information in addition to receiving, and in contrast to the above register sender, although not specifically shown in the above configuration, , the register sender device of the originating station also has a similar function.

Then, by performing a new connection process using the received call forwarding registered number information, the connection process can be performed to configure a call line as if the caller had directly dialed the subscriber who is registered for call forwarding. It is possible to eliminate the redundant connection configuration of call lines (relay lines) when connecting inter-office call forwarding that occurs when the common line signaling system is not used, and it is possible to provide an economical inter-office call forwarding service. be.

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

FIG. 1 shows an example of a conventional inter-office absent transfer system that does not rely on a common line signaling system.

In FIG. 1, EX- is A, B, and C exchange equipment;
UB-A is the calling subscriber, 5UB-B is the calling subscriber, 5U
B-C is the registered subscriber of 5UB-B, TRK-
is the telephone trunk, ■R- is the incoming register, OR- is the outgoing register, O8- is the outgoing sender, IRL- is the incoming register link, R8 hole is the register sender link, 廠- is the common control device, NGT- is the number group translator,
MU- indicates a missed call forwarding registration memory device.

To simplify the explanation below, subscribers and devices will be referred to only by symbols, except in special cases.

When 5UB-A raises the handset, MK-A
5UB-A-EX-A-OR-A (7) connection is made and 5UB-A hears dial tone.

When you dial the calling number of 5UB-A or 5UB-B,
The calling number is received and stored at 0R-A and transferred to 0R-A.

MK-A transfers the transferred number information to NGT-A, translates it into information necessary for connection, and sends it to TRK-AI and OS.
-'Select A and SUB -A-EX-A -TRK
-A 1 and 0R-A-R8 hole -A-O8-A-EX-
Connect A-TRK-AI.

The calling number of 5UB-B received and stored in 0R-A is 0R.
-A to 0R-A-R8 hole -A - Transferred to 08-A via the path of 08-A, and from 08-A to O8-A -EX-
It is retransmitted to TRK-Bl via the path A-TRK-AI.

0R when 08-A completes sending the calling number of 5UB-B
-A and 08-A are restored, and at the same time 5UB-A-EX-
Connection between A-OR-A and 0R-A -R8 hole -A
The connection between -O8-A -EX-A -TRK-A 1 has been restored, and the communication path of 5OB-A is S [JB-A-EX-A
-TT (consists of the K-AI path).

When TRK-Bl is activated by an incoming call from TRK-AI, it activates MK-B, which in turn activates TRK-BGd.
It is connected to IR-B via the path B1-IRL-B-IR-B, and the calling number of 5OB-B is received and stored in IR-B.

■When R-B receives the calling number of 5UB-B,
Transfer that information to MK-B.

MK-B transfers the calling number of 5UB-B to NGT-B and translates it into the information necessary for connection.

If 5UB-B is registering call forwarding, MK-B
SOB-B's EX-B accommodation location information translated by T-B is transferred to MU-B, and 5UB-B's missed call forwarding registration number information (SUB-C's calling number) is received from MU-B. The 5UB-C calling number is transferred to NGT-B again, translated into the information necessary for connection, and TRK-B2 and 08-B
Select TRK-Bl-EX-B-TRK-B2 and IR-B-R8 hole-B-08-B-EX-B-row W-B2, and connect S[JB-B2 to IR-B. Transfer C's calling number.

The calling number of 5UB-C is transferred from IR-B to 08-B via the route of IR-B-R8 hole-B-O8-B, and 08-B
TRK from 08-B-EX-B-TRK-B2 route
- retransmitted to A2.

5 when O8- and B complete sending the calling number of 5UB-C.
．． 08-B and IR-B are restored, and at the same time TRK-B
1-I RL-B-IR-B and I RB-RS
The connection between L-B -O5-B-EX-B-T RK-B 2 has been restored, and the communication path of TRK-Bl is now TRK-Bl.
-EX -B-T RK -B Consists of 2 routes.

When TRK-A2 is activated by an incoming call from TRK-B2, it activates MK-A and the TRK-A receives TRK-A.
It is connected to IR-A via the path A2-IRL-A-IR-A, and the calling number of 5UB-0 is received and stored in IR-A.

When IR-A finishes receiving 5UB-C's calling number, it transfers the information to MK-A.

Thereafter, MK-A performs the same connection control as a general relay connection (tandem connection) from station B to station C.

That is, MK-A selects TRK-D and 08-A, and TRK-A 2-EX-A -TRK-D and IR
-A-R8L -A -OS -A-EX-A-TRK
- Make the D connection.

The calling number for 5UB-〇 is ■R-A to IR-A-R8
Transfer to 08-A via the route L-A-O8-A, 08-
TRK from A to 08-A-EX-A-TRK-D route
−Resent on 〇.

When 08-A completes sending the calling number of 5UB-C, 0
8-A and IR-A are restored, and at the same time TRK-A 2-
Between I RL-A and IR-A and I RA-A-RS L
The connection between -A -O8-A-EX-A-TRK-D has been restored, and the communication path of TRK-A2 is now TRK-A 2-EX.
-A-TRK-D path.

The C station receives the calling number of S[JB-C and makes a general incoming call connection, and TRK-C receives the call number of TRK-C-EX-C-8.
It is connected to 5OB-C through the OB-C path.

In other words, the communication path between JB-A and 5UB-C is S[,
B-A-E X-A-T RK-A I-T RK
.

-B 1-EX-B -T RK-B2-T RK-A
2-EX-A-TRK-D-TRK-C-EX-C-8
They will be connected via the UB-C path.

As described above, in the conventional system shown in FIG. 1, a redundant connection configuration of communication lines (relay lines) occurs, resulting in a communication failure.

This has the disadvantage that the effective usage efficiency of the line decreases rapidly.

FIG. 2 shows an embodiment of the inter-office absent transfer system of the present invention.

To further explain the names of each symbol, EX- is A,
B, C each exchange equipment.

5UB-A is the calling subscriber, 5UB-B is the called subscriber, 5
UB-C is 5UB-B's call forwarding registered subscriber, TRK
- indicates a telephone trunk, OR indicates a calling register, R8- indicates a register sender device, MK- indicates a common control device, NGT- indicates a number group translator, and MU- indicates a missed call transfer registration memory device.

In order to simplify the explanation below, only symbols will be used as in the case of FIG. 1.

When 5UB-A lifts the handset, MK-
The S UB-A-EX-A-OR connection is made by A, and 5UB-A hears a dial tone.

When 5OB-A dials 5OB-B's calling number,
The call number is received and stored in the OR and transferred to the MK-A.

MK-A transfers the transferred number information to N GT-A, translates it into information necessary for connection, and then transmits it to TRK-A and R8.
-A to connect T RK-A-EX-A-R8-A, and connect S [J B -A-EX-A-TR
A connection link between K and A is reserved, and the calling number of 5UB-B transferred from OR is transferred to R8-A.

The calling number of 5UB-B dialed by 5UB-A is R.
T on the route from 8-A to R8-A-EX-A-TRK-A
It is retransmitted to RK-B.

If the called number of 5UB-C is not a subscriber in station A, when TRK-B is activated by the incoming call from T'RK-A, it activates MK-B and is called by MK-H.
It is connected to R8-B via the path RK-B-EX-B-R8-B, and the calling number of 5UB-B is received and stored in R8-B.

After R8-B has received the calling number of 5UB-B, it transfers the information to MK-B.

MK-B transfers the calling number of 5UB-B to NGT-H and translates it into information necessary for connection.

If 5UB-B is registered for call forwarding, MK-B is NGT
M
Transfers to U-H, receives 5UB-B's call forwarding registration destination number information (SUB-C's calling number) from MU-B, and transfers the 5UB-C's calling number to NGT-B again to establish a connection. Translate it into the necessary information.

If the forwarding destination is not a subscriber within its own station (station B), MK-B forwards the called party's call forwarding registration display information and call forwarding registration destination number information (SUB-C's calling number) to R8-B. do.

R8-B uses the above information from MK-B as R8-B-EX.
-B-TRK-B-TRK-A-EX-A-R8-
It is retransmitted to R8-A via route A, and when the transmission is completed, MK-B is activated.

MK-B is the R8-B and R8-B-EX-B-TR
Restore the connection between K and B.

R8-A receives and stores information from R8-B and then transfers it to MK-A.

If you are not a subscriber within the calling number of 5UB-C, M
When K-A receives the called party call forwarding registration display information from R8-A and the calling number of 5UB-C, it restores the connection between TRK-A and TRK-A-EX-A-R8-A. , TRK-A-EX-A-8UB-A selected earlier
Release the link reservation for connection between 5UB-C, then transfer the calling number of 5UB-C to NGT-A, translate it into the information necessary for connection, select TRK-D, and select TRK-D-EX-A. −
Connect R8-A and connect 5UB-A-EX-A-T
A connection link between RK-D is selectively reserved, and the calling number of 5UB-C is transferred to R8-A again.

The calling numbers for 5UB-C are R8-A to R8-A-EX-
It is retransmitted to TRK-C via the route A-TRK-D.

On the other hand, TRK-B becomes empty due to the restoration of TFl and -A.

If the calling number of 5UB-C is for a subscriber within the station, MK
-A performs general mutual connection processing within its own station.

That is, MK-A selects an internal interconnection trunk (IOT) (not shown) and connects it to 5UB-A-EX-A-
I0T-EX-A-8 [Connect JB-C.

Returning to the case where the called number of 5UB-C is not a subscriber in station A, TRK-C activates MK-C when activated by the incoming call from TRK-D, and
It is connected to R8-C through the path RK-C-EX-C-R8-C, and the calling number of 5UB-C is received and stored in R8-C.

When R8-0 finishes receiving the calling number of 5UB-C, it transfers the information to MK-C.

MK-C transfers the calling number of 5UB-C to NGT-C and translates it into information necessary for connection.

Thereafter, the MK-C performs the same connection processing control as the MK-B of the B station.

At this time, if 5UB-C is not registered for missed transfer, first selects the connection link between 5UB-C-EX-C-TRK-C and transfers the recovery information to R8-C.

R8-C sends the recovery information to R8-C-EX-C-TRK.
-C-TRK-D-EX-A-R8-A route.

Next, when the R8-C completes sending the restoration information, the MK-C restores the connection between the R8-C and R8-C-EX-C-TRK-C, and the previously selected S U B-C- EX-
Connects between C-TRK-C.

On the other hand, when R8-A receives and stores the recovery information from R8-C, it transfers the information to MK-A, and MK-8 uses the information to restore R8-A, OR, R8=A-EX-A-TRK.
-Restore the connection between D and 5UB-A-EX-A-OR, and 5UB-A-EX-A- which was selected and reserved in advance
Connect between TRK and D.

Therefore, the connection between 5UB-A and 5UB-C is S UB
-A-EX-A -TRK-D -TRK-C-E
The configuration is X-C-8UB-C.

If 5UB-C is registering call forwarding to a subscriber within its own station (station C), MK-C sends 5 to MU-C in the same way as MK-B above.
Transfer the EX-C storage location information of OB-C, receive the call forwarding registration number, transfer the call forwarding registration number to NGT-C again, translate it into the information necessary for connection, and perform the steps described in step 5 above.
The same control as the UB-C connection process is performed.

Also, S [JB-
If C has registered call forwarding to another subscriber, for example S [JB-D, the incoming call from 5UB-A to 5UB-B is prohibited from being connected to 5OB-D, and only 5U
If you want to restrict the double call forwarding connection of connecting to B-C, when sending the calling number of 5UB-C from R8-A to R8-C, MK-A should set S[JB-C's This is possible by adding display information indicating that the call is a call forwarding call in addition to the calling number, and sending the call from the R8-A.

In the above embodiment, the case where the receiving station and the transmitting station are adjacent to each other has been described, but the same applies even if there is a relay station in the middle of the line.

In other words, since no other lines are used in the present invention, the presence or absence of a relay station is completely irrelevant.

As described above, in the system of the present invention shown in FIG. 2, when a caller calls a subscriber of another station whose call is forwarded to another station, the caller receives a call as if he were directly calling the subscriber to whom call forwarding is registered. Accordingly, it is possible to configure a communication path with a high efficiency, thereby preventing a decrease in the efficiency of effective use of the communication line that occurs in the method shown in FIG. 1, and maintaining the economical efficiency of the entire system.

[Brief explanation of the drawing]

FIG. 1 is a block diagram illustrating an example of a conventional inter-office absent transfer method that does not rely on a common line signaling system, and FIG. 2 is a block diagram showing an example of an inter-office absent transfer method according to the present invention. It is. Symbol explanation: 5UB-A, B, and C are the calling subscriber, the called subscriber, and the subscriber to which the called subscriber is registered for call forwarding, EX-
A, B, and C are exchange equipment for A, B, and C stations, TRK
- is a telephone trunk, R8- is a register sender device, O
R- indicates a transmission register, MK-common control device, NGT- a number group translator, and MU- a missed transfer registration memory device.

Claims (1)

[Claims] 1. In the connection processing method for inter-office connection information in the inter-office call forwarding service of a telephone exchange, a system that has sufficient capacity to receive and send out the extension subscriber's absent registration display information and call forwarding destination number-specific information; Every week, we install a register sender device that has the function of transmitting information edited based on the received information through the line used to receive the information, and the extension subscriber who is registered for call forwarding from the sending station to the receiving station. When there is an incoming call connection, the extension subscriber's absentee registration display information and call forwarding destination number information edited at the receiving station are transferred from the register sender device to the originating station through the line used for the incoming call connection. An inter-office missed transfer system characterized in that the sending station receives the sent information, restores the line, and then reconnects based on the received information.