JPH0728339B2 - Representative selection method - Google Patents

Description

DETAILED DESCRIPTION [Overview] In an integrated service digital network, a subscriber device connected to the integrated service digital network by a plurality of subscriber lines receives an incoming call notified via an arbitrary subscriber line. On the other hand, an arbitrary subscriber line is selected and notified to the integrated service digital network, and the integrated service digital network sets up an incoming call via the notified integrated subscriber line.

[Industrial application field]

The present invention relates to improvement of a representative selection method in a comprehensive service digital network.

Integrated Service Digit
al Network) provides a plurality of information channels on a single subscriber line and enables simultaneous setting of a plurality of calls via the subscriber line.

When setting up a call via such a subscriber line, the subscriber device side can specify the information channel to be used in the integrated service digital network.

Further, for a subscriber device that uses a plurality of subscriber lines, such as an automatic private branch exchange, it is desired to be able to specify an arbitrary information channel on an arbitrary subscriber line.

[Conventional technology]

FIG. 4 is a diagram showing an example of a conventional representative selection method,
FIG. 5 is a diagram showing an example of the information channel selection process in FIG.

In FIG. 4, an automatic private branch exchange 2 is connected to a digital exchange 1 constituting the integrated service digital network by three subscriber lines 31 to 33.

On the subscriber line 31, there are x sets of information channels B11 to B1x,
A signal channel D1 for transmitting various control signals for controlling a call established via each of the information channels B11 to B1x is provided.

Similarly, the subscriber lines 32 and 33 are provided with information channels B21 to B2y and a signal channel D2, and information channels B31 to B3z and a signal channel D3, respectively.

In FIG. 4 and FIG. 5, when an incoming call to the automatic private branch exchange 2 occurs in the digital exchange 1, the call processing unit 12 makes a predetermined call from the subscriber lines 31 to 33 connected to the automatic private branch exchange 2. One subscriber line (for example, 31) is selected based on the selection criteria, and the identification number C1 in the idle state is selected from the identification numbers CR1 for identifying the calls set on the subscriber line 31.
R1 = m is selected, and the signal device 13 is instructed to transmit the incoming call signal a (CR1 = m) including the selected identification number CR1 = m to the automatic private branch exchange 2 via the subscriber line 31. At the same time, the identification number CR1 = m is stored in the call information area 121 which holds various information for controlling the call.

The signaling device 13 receives the subscriber line 31 via the signal add / drop device 14.
An incoming signal a (CR1 = m) instructed by the call processing device 12 is sent to the upper signal channel D1.

The automatic private branch exchange 2 uses the signaling channel D1 on the subscriber line 31.
When the incoming call signal a (CR1 = m) transmitted via the is received, the information channel (for example, B1j) used for the incoming call signal is selected from the information channels B11 to B1x on the subscriber line 31. , The response signal b (CR1 = m, ch1 =, which includes the identification number CR1 = m included in the incoming signal a (CR1 = m) and the channel information ch1 = j indicating the selected information channel B1j.
j) on the signaling channel D1 on the subscriber line 31.

In the digital exchange 1, the signaling device 13 is the subscriber line 31.
Response signal b transmitted via the upper signal channel D1
(CR1 = m, ch1 = j) is transmitted to the call processing device 12.

The call processing device 12 receives the response signal b transmitted from the signaling device 13.
After allocating the information channel B1j specified by the channel information ch = j included in (CR1 = m, ch1 = j) to the incoming call, the response confirmation signal c (CR1 = m) including the identification number CR1 = m
Is transmitted to the automatic private branch exchange 2 in the same process as the incoming signal a (CR1 = m), and the channel information ch1 = j is stored in the call information area 121 in which the identification number CR1 = m is stored. .

Thereafter, the digital exchange 1 and the automatic private branch exchange 2
Information is transmitted and received via the information channel B1j on the subscriber line 31.

[Problems to be solved by the invention]

As is clear from the above description, in the conventional representative selection system, the digital exchange 1 unilaterally selects the subscriber line 31 used for an incoming call to the automatic private branch exchange 2.

Therefore, for example, even when the automatic private branch exchange 2 desires to preferentially use the information channels B1 to B1x on the subscriber line 31 for the outgoing call from the automatic private branch exchange 2, the automatic private branch exchange 2 Is the information channel B1 on the selected subscriber line 31
The information channel B1j used for the incoming call has to be selected from 1 to B1x.

[Means for solving problems]

 FIG. 1 is a diagram showing the principle of the present invention.

In FIG. 1, 100 is a service integrated digital network according to the present invention, 200 is a subscriber device according to the present invention, and 3 is a service integrated digital network 100 and a subscriber device 200.
Is a plurality of subscriber lines that connect

When the incoming call to the subscriber unit 200 occurs, the integrated service digital network 100 sends the incoming call signal a ′ with the call identification number CID to any of the subscriber lines 3 among the plurality of subscriber lines.
It is transmitted to the subscriber device 200 via 3p.

The subscriber unit 200 which has received the incoming call signal a ', the subscriber line 3
Select any subscriber line 3q in the above, and send the response signal b'with the call identification number CID attached to the incoming call signal a'to the integrated service digital network 100 via the subscriber line 3q. Send it back.

The integrated service digital network 100 sets up the above-mentioned incoming call to the subscriber unit 200 via the subscriber line 3q to which the response signal b'is returned.

[Action]

Now, when an incoming call to the subscriber device 200 occurs in the integrated service digital network 100, the integrated service digital network 10
0 indicates an incoming signal a ′ for the subscriber unit 200, which is an arbitrary subscriber line 3 among a plurality of subscriber lines which accommodate the subscriber unit 200.
It is transmitted to the subscriber device 200 via p. It should be noted that the incoming call signal a ′ includes, from among the calls that are occurring with respect to the subscriber device 200,
It includes a call identification number CID = n that identifies the incoming call that occurred.

The subscriber unit 200 which has received the incoming call signal a'is not limited to the subscriber line 3p to which the incoming call signal a'is transmitted, and is not limited to the subscriber line 3p connected to the integrated service digital network 100. Select any subscriber line (eg 3q) from the
The response signal b'containing the same call identification number CID = n as the incoming call signal a'is returned to the integrated service digital network 100 via the selected subscriber line 3q.

The integrated service digital network 100 sets up an incoming call to the subscriber unit 200 via the subscriber line 3q to which the response signal b'is returned.

Therefore, the subscriber device 200 is connected to the integrated service digital network 100.
It is possible to specify the subscriber line 3q to be used for an incoming call from the, and the serviceability of the integrated service digital network is improved.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a diagram showing a representative selection method according to an embodiment of the present invention, and FIG. 3 is a diagram showing an example of an information channel selection process in FIG. The same reference numerals denote the same objects throughout the drawings.

In FIG. 2, the call processing device of the digital exchange 1 '.
A representative selection processing unit 15 is provided in 12 ', and a line selection processing device 21 is provided in the automatic private branch exchange 2'.

2 and 3, when an incoming call is made to the digital private branch exchange 1'to the automatic private branch exchange 2 ', the call processing unit 12' includes the automatic private branch exchange 2'which has three subscriber lines.
It identifies that 31 to 33 are used, and the representative selection processing unit
Start up 15.

The representative selection processing unit 15 selects an idle call identification number CID = n from the call identification numbers CID for identifying the calls set on the subscriber lines 31 to 33, and also selects the subscriber lines 31 to 33. Any subscriber line (eg 3
1) is selected, and from the identification numbers CR1 for identifying the call set on the subscriber line 31, the idle identification number CR1 = m is selected, and the selected identification number CR1 = m and the call identification number are selected. C
The signal device 13 is instructed to transmit the incoming call signal a '(CR1 = m, CID = n) including ID = n to the automatic private branch exchange 2'through the subscriber line 31, and the call is transmitted. An identification number CR1 = m and a call identification number CID = n are stored in a call information area 151 that holds various information to be controlled.

The signaling device 13 receives the subscriber line 31 via the signal add / drop device 14.
An incoming call signal a '(CR1 = m, CID = n) instructed by the call processing device 12' is sent to the upper signal channel D1.

The automatic private branch exchange 2'has a signaling channel D1 on the subscriber line 31.
Incoming signal a '(CR1 = m, CID =
When n) is received, the line selection processing device 21 is activated.

The line selection processing device 21 preferentially allocates the subscriber line 31 to an outgoing call from the automatic private branch exchange 2'and preferentially allocates the subscriber line 33 to an incoming call to the automatic private branch exchange 2 '. Then, the subscriber line 33 is selected for the incoming call notified by the incoming signal a '(CR1 = m, CID = n), and the incoming call is received from the information channels B31 to B3z on the subscriber line 33. Select the information channel (for example, B3j) to assign to the call and select subscriber line 3
The ID number CR3 = i in the idle state is selected from the ID numbers CR3 for identifying the calls set on the above 3, and the selected identification number CR3 = i and the incoming signal a '(CR1 = m, CID = N), the response signal b '(CR3 = i, CID = n, ch3 = j) including the call identification number CID = n and the channel information ch3 = j indicating the selected information channel B3j, It is sent to the signal channel D3 on the subscriber line 33.

In the digital exchange 1 ', the signaling device 13 is a subscriber line
The call processing device 12 'receives the response signal b' (CR3 = i, CID = n, ch3 = j) transmitted via the signal channel D3 on 33.
Communicate to.

In the call processing device 12 ', the response signal b' (CR3 = i, CID = n, ch3 = j) transmitted from the signal device 13 is received by the subscriber lines 31 to 3.
When it is identified as being returned from the automatic private branch exchange 2'which uses 3, the representative selection processing unit 15 is activated.

The representative selection processing unit 15 receives the response signal b ′ (CR3 =
i, CID = n, ch3 = j), and channel information ch3 =
After allocating the information channel B3j designated by j to the incoming call, the call information area 151 including the call identification number CID = n is searched, and the identification number CR1 = m included in the retrieved call information area 151.
Release the previously selected subscriber line 31 and the identification number CR1 = m in the subscriber line 31, and newly identify the identification number CR3 = i in the subscriber line 33 and the information channel B3j indicated by the channel information ch3 = j. Is assigned to the incoming call, and a response confirmation signal c '(CR = i) including the identification number CR = i is instructed to the signal device 13 and the automatic private branch exchange 2 via the signal channel D3 on the subscriber line 33. ’, And call identification number CI
The identification number CR1 = m stored in the call information area 151 in which D = n is stored is changed to the identification number CR3 = i, and the channel information ch3 = j is stored.

Thereafter, the digital exchange 1'and the automatic private branch exchange 2 '
Transmits and receives information via the information channel B3j on the subscriber line 33.

As is clear from the above description, according to this embodiment, the automatic private branch exchange 2'can specify the desired subscriber line 33 for the incoming call from the digital exchange 1 '.

2 and 3 are merely examples of the present invention. For example, the number of subscriber lines that can be used by the automatic private branch exchange 2'is not limited to three, and two or more subscriber lines can be used. The effect of the present invention does not change even in the case of an arbitrary number of. Further, the configurations of the integrated service digital network 100 and the subscriber unit 200 are not limited to those shown in the figure, and many other modifications can be considered, but in any case, the effect of the present invention does not change.

〔The invention's effect〕

As described above, according to the present invention, in the integrated service digital network, the subscriber device can specify the subscriber line to be used for the incoming call from the integrated service digital network. The property is improved.

[Brief description of drawings]

FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a diagram showing a representative selection method according to an embodiment of the present invention, FIG. 3 is a diagram showing an example of an information channel selection process in FIG. FIG. 4 is a diagram showing an example of a conventional representative selection method, and FIG. 5 is a diagram showing an example of an information channel selection process in FIG. In the figure, 1 and 1'are digital exchanges, 2 and 2'are automatic private branch exchanges, 3, 31 to 33, 3p and 3q.
Is a subscriber line, 11 is a communication network, 12 and 12 'are call processing devices, 13 is a signal device, 14 is a signal add / drop device, 15 is a representative selection processing unit, 121 and 151 are call information areas, and 21 is a line. Selective processing devices, a and a'are incoming signals, b and b'are reply signals, B11 to B3z are information channels, c and c'are reply confirmation signals, CID is call identification number, ch1 and ch3 are channel information, CR1 and CR3 indicate identification numbers, and D1 to D3 indicate signal channels.

Claims (1)

[Claims] 1. A service integrated digital network (100) for accommodating a subscriber device (200) connected to a service integrated digital network by a plurality of subscriber lines (3), said service integrated digital network (100) comprising: When an incoming call to the subscriber unit (200) occurs, a call identification number (CID) is added to the incoming call signal (a '), and any subscriber among the plurality of subscriber lines (3) The subscriber unit (200) which has transmitted to the subscriber unit (200) via the line (3p) and has received the incoming call signal (a ').
Selects an arbitrary subscriber line (3q) among the subscriber lines (3) and sends the call identification number (CID) to the integrated service digital network (100) via the subscriber line (3q). ) Is returned, and the integrated service digital network (100) passes through the subscriber line (3q) to which the response signal (b ') is returned, and A representative selection method characterized by setting up an incoming call to (200).