JPH0451755A - Isdn line control system - Google Patents

Abstract

PURPOSE:To attain line exchange processing by adding a software converting a message of an ISDN line into information of an existing line and a software outputting properly output information of the existing line to the ISDN line and the existing line to the system. CONSTITUTION:A basic control section 37 and an application control section 38 execute exchange processing and additional service processing for an existing line 20 and an ISDN line 21 as the processing of the existing line. Thus, a message analysis section 35 converts a message of a D-channel 32 sent from the ISDN line 21 into a message (input information) of the existing line 20 having an identical meaning and sends the converted message to the basic control section 37. When the output information outputted from the basic control section 37 is information for the ISDN line 21, a message control section 36 converts the output information into a message of the ISDN line 21 having the identical meaning and sends the result to a network 24.

Description

[Detailed Description of the Invention] [Summary] Regarding a line control method for an exchange that accommodates an existing line and an ISDN line and performs line control for both lines, it is possible to connect the existing line without externally attaching the ISDN exchange to the exchange for the existing line The purpose of this system is to enable line control of existing lines and ISDN lines using only one exchange. In other words, the purpose is to enable line control software for existing lines to be used for line control of ISDN lines. In a switching system consisting of a human power information control unit that analyzes information, an existing exchange processing unit that performs internal processing according to the analysis results by the input information control unit, and an output information control unit that edits output information from the existing exchange processing unit, the ISDN line is (Open system interconnection) An ISDN line input/output control means that terminates at the layer 1 and layer 2 levels of the layer protocol of the reference model, and input from the ISDN line via the ISDN line input/output control means. A message analysis means that analyzes an input message of the D channel protocol and converts it into input information similar to the existing line that can be processed by the existing exchange processing unit, and a call state management according to the input information from the existing line and the ISDN line. A basic control means that executes basic exchange processing consisting of line blockage management, data management, and bus control;
Application control means for executing additional service processing according to human input information from the existing line and ISDN line, and message control means for receiving output information for the existing line from the existing exchange processing unit and editing an output message for the ISDN line. It is configured to have the following.

[Industrial application field]

The present invention relates to an ISDN line control system, and more particularly to a line control system for an exchange that accommodates an existing line and an ISDN line and performs line control of both lines.

[Conventional technology]

In recent years, in the Integrated Services Digital Network (RSDN), a common channel signaling system based on the CCITT Recommendation I series using the D channel (hereinafter referred to as ISDN) has been introduced.
(hereinafter referred to as "line") is being developed. Along with this, there has become a need for a line control system that accommodates existing lines and ISDN lines in one exchange and performs line control for both lines.

FIG. 5 is a system configuration diagram of a conventional exchange that performs line control of IS+DN lines and existing lines.

First, the existing line 50 is connected to the network 5 via an existing line trunk unit 51 that performs signal processing.
2-1, the ISDN line 53 connects to the network 52 via an 1sDN line trunk unit 54 terminating layer 1 and layer 2 of the O8I reference model.
-2. Each network (52-1, 52-
2) are connected to CPR (call processing unit)/MPR (central processing unit) control carts (55-1, 55-2) that execute call processing and control of the entire network.

Each network (52-1, 52-2) is connected by an intersystem communication path relay line 56 and a No. 7 common signal line 57. The intersystem communication path relay line 56 is a communication line, and is N0.
17 common signal &'5!57 is a control signal line.

The existing line trunk unit 51 is an LPR (
line processor) 58, and terminates the signal line of the existing line 50. This connects the speech line 59 and signal path 60 from the existing line trunk unit 51 to the network 52-1. On the other hand, ISDN line 5
The signal output from the ISDN line trunk unit 54 is electrically and physically terminated by a layer I termination section 61, and separated into a B channel and a D channel. The B channel signal 63 is directly connected to the network 52-2. - On the other hand, the D channel signal 64 terminates layer 2 of the data link at an LPR (line processor) 62 in the ISDN line trunk unit 54 and is connected to the network 52-2.

CP connected to network 52-1 of existing line 50
The R/MPR control cart 55-1 includes an input information control unit 65 that controls input information input from the existing line 50, an output information control unit 66 that controls output information output to the existing line 50, and an output information control unit 66 that analyzes input information. , an existing exchange processing unit 78 that executes internal processing corresponding to the input information and generates output information to be output to the existing line, and a CPR/MP Rffd control card 55 connected to another network.
-2 consists of an inter-system communication processing section 70 that controls communication with -2.

The existing exchange processing unit 78 is an analysis unit 67 that analyzes input information.
, and an internal processing execution unit 69 that executes exchange processing according to the analysis by the analysis unit 67. Further, the internal processing execution section 69 stores individual instructions to be sent to the line processor 5 and individual instructions for controlling the network as an output macro port 8.

On the other hand, the CPR/MPR control card 552 connected to the network 52-2 of the ISDN line 53 analyzes the input message sent from the ISDN line 53, executes internal processing corresponding to the message, and further , a message processing section 71 that outputs necessary output camera noise to ISDN [11i1153], a protocol conversion processing section 72 that executes protocol conversion between the ISDN line and the existing line, and is connected to another network 52-1. The intersystem communication processing section 73 controls communication with the CPR/MPR control card 55-1.

That is, in order to coexist the existing line 50 and the ISDN thread 53, an ISDN exchange processing unit (CPR/MPR control card 55-1) is installed separately from the existing line exchange processing unit (CPR/MPR control card 55-1).
In this method, an R/MPR control card 55-2) is connected, a protocol converter between the existing line and the ISDN line is provided therein, and the existing line 5O and the ISDN line 53 are connected using inter-system communication.

Next, the operation of this system will be explained with reference to FIGS. 5 and 6. FIG. 6 is a diagram showing the principle of the second conventional ISDN line control method. In this case, the exchange consists of an existing line exchange part 75 and an ISDN line exchange part 76, and the two exchanges are connected by an intersystem communication line. Each switch (75, 76) consists of an LPR (line processor) and a CPR (call processing unit)/MPR (central processing unit).

For the existing line 50, the line processor in the existing line trunk unit 51 performs the existing line person output control processing S1 in 5 days. It performs detection, reception of dial pulses, monitors disconnection, and sends a calling signal to the existing line 50.

Signals such as call origination, dial pulse, and disconnection detected in the existing line input/output control processing S1 are then sent to the CPR/MPR 55.
-1, and first, the input information control section 65 performs input information control processing S2. S2 converts the signal sent from the existing line input/output control process S1 into logical information, that is, input information 77 such as call origination, selected numerical number, and disconnection.

The input information 77 is then input to the existing exchange processing section 7B within the CPR/MPR 551. In the existing exchange processing unit 78, first, the input information 77 is analyzed by the analysis unit 67 (S3),
Determine the type of internal processing to be performed. Then, the internal processing execution unit 69 executes the exchange processing based on the determination result of S3 (S4).

For example, if the input information 77 is information indicating a call, a dial tone is connected, the selected digits are received,
Processing such as issuing a command requesting a selection number to the existing line 50 side is executed. Commands to be sent to the processor of the existing line trunk unit 51, such as selection digit request commands, and commands to control the network are sent to the output macro port 8.
These instructions are stored in the existing exchange processing section 78 as output information 79, and in S4, these instructions are outputted to the output information control section 66 as output information 79.

The output information control unit 66 executes control to send the output information 79 output from the existing exchange processing unit 78 to the existing line trunk unit 5I and the networks 52-1, that is, output information control processing s5. Existing line/
The command sent to the trunk unit 5I is converted into an analog signal by the LPR signal termination unit 58 (existing line input/output control 1 Sl), and the existing line! Sent to a50.

On the other hand, for the ISDN line, the ISDN line trunk unit 54 performs ISDN input/output control processing S6. That is, first, the layer 1 termination section 61 electrically and physically terminates the signal, and sends out the B channel signal to the network. On the other hand, electrically and physically terminated D channel signals are transmitted to the LPR 6 in the ISDN line trunk unit 54.
2 terminates the layer 2 data link layer. The D channel signal whose layer 1 and layer 2 are terminated by the ISDN line input/output control process S6 is sent via the network 522 to the CPR/MPR control card 55- of the network 52-2.
The message is sent to the message processing section 71 in 2.

If both the originating and receiving calls are ISDN lines, the message processing unit 7I analyzes the D channel signal and
Exchange processing for N lines is executed (S7). The output message is then sent to the terminating ISDN line trunk unit via the ISDN line network 52-2.

Next, we will explain the operation when the calling side is the existing line 5o and the called side is the ISDN line 53, and when the calling side is the ISDN line 53 and the called side is the existing line 5o, the principle diagram in Figure 6 and the sequence shown in Figure 7. This will be explained according to the diagram.

Figure 7(a) shows the existing screen llA30 → ISDN line 5.
3 is the communication procedure.

First, from the existing line 50 to the existing line network 52-
1, the calling signal is input to the existing exchange processing section 78 as input information 77 (371).

The existing line processing unit 78 analyzes this input signal 77 in S3.
), if it is determined to be a calling signal, the corresponding internal processing is executed (S4). That is, a reception request signal of selected digits indicating the dial number of the called party is output as output information 79 to the existing line 50 (S72). The calling side receives this signal and returns the selected number to the existing exchange processing unit 78 (S73
). The existing exchange processing unit 78 analyzes this selected number and determines whether the called party is on the existing line 50 or the ISDN line 53 (S3).

If it is determined that the communication is between existing lines 50, the internal processing execution unit 69 of the existing exchange processing unit 78 executes exchange processing as described above (S4). On the other hand, the receiving side uses the rsDN line 53
If it is determined that the
The internal processing execution unit 69 executes the process of transmitting to the SDN line side (S4).

That is, the internal processing execution unit 69 executes line connection with the ISDN line using the line connection procedure of 15UP (ISDN User Part) of the No. 7 common signaling system.

First, the internal processing execution unit 69 sends a call setup request message IAM (Initial ad
CPR/MPR control car 1 on the existing line side
'55-1 sends the ISDN line side (7) CPR/MPR control car 155-24m (S74). Both CPR/MP
Communication between R control cards (between 55-1 and 55-2) is N
o, 7 via the common signal line 57 (intersystem communication processing S
8). For this reason, each CPR/MPR control card (55-
L55-2) has an intersystem communication processing unit (each 70.73
) exists, and both inter-system communication processing units (70 and 73) control inter-system communication, that is, execute inter-system communication processing S8.

Next, the CPR/MPR control card 55 on the ISDN line side
The call setting request message IAM received by the intersystem communication processing unit 73 in the CPR/MPR control card 55-2
The message is sent to the protocol conversion processing unit 72 in the PC and executes a protocol conversion process to convert the No. 7 common signaling message into an ISDN message (S9). With this, No.

7 Common Signaling Call Setup Request Message IAM
Converted to SDN message 5ETUP.

The converted message 5ETUP is sent to the message processing section 7
1 to the 15PR62 of the ISDN line 53 on the called side (375).

Upon receiving the message 5ETUP, the LPR 62 starts call setup processing and sends a message CALL PROC (CALL PR
CPR/MPR control card 55-
The message is returned to the message processing unit 71 of No. 2 (S76). The message processing section 71 sends this message to the protocol conversion processing section 72, and the protocol conversion processing section 72 sets the message CALL PROC of rsDN as No, and the message ACM (Address comp) of the 7 common signaling method.
ete, address complete) (S9).

Then, this message is sent to the existing exchange processing section 7 by the intersystem communication processing S8 (S77).

The LPR 62 then executes the process of calling the called party, and sends the message ALERT (
ALERT ing) is sent to the CPR/MPR control card 55-2 on the ISDN side (S78). The message processing section 71 of the CPR/MPR control card 55-2 sends this message to the protocol conversion processing section 72, and the protocol conversion processing section 72 converts the ISDN message ALERT into N.
o.

7 Common Signaling Message CPG (Ca Ilp
(39). Message CP
G is a message indicating an event occurrence notification during call setup. This message is sent to the existing exchange processing section 78 by intersystem communication processing S8 (S79).

Depending on the type of ISDN terminal, message C
There are also terminals that do not generate ALL PROC and message ALERT. In that case, ISDN line 53
These two messages will not be sent. Therefore,
The message processing unit 71 sends the message 5ETUP to the IS
After transmitting to the DN line 53 (S75), No. 7 is sent via protocol conversion processing S9 and intersystem communication processing S8.
Messages ACM and CPG of the common signaling system are sent to the existing exchange processing unit 78.

When the called party answers (off-hook), the LPR 62 on the called side of the ISDN line 53 sends a message C0NN (CONNect) to CPR/M to notify that the called party has answered.
It is sent to the PR control card 55-2. The message processing unit 71 of the CPR/MPR control car) '55-2 sends a message C0NN ACK (CONNe
c t ACKknowledge) (38
1) and sends the message C0NN to the protocol conversion processing section 72. The protocol conversion processing unit 72 sets the message C0NN to No, and the message AN of the 7 common signal method 2.
M (Answer) (S9), and sends it to the existing exchange processing unit 78 through intersystem communication processing S8 (S82
).

When the existing exchange processing section 78 receives the message ANM, the communication path 59 between the calling side and the called side is determined. The analysis unit 67 of the existing exchange processing unit 78 analyzes this message in S3.
), the internal processing execution unit 69 issues a command (
disconnection monitoring) is sent to the existing line 5o as output information 79 (
383). This completes the call processing and allows you to start talking.

FIG. 7(b) is a sequence diagram of call processing from the ISDN line 53 to the existing line 50.

First, a call setup request message SETTJP is sent from the ISDN line 53 side via the LPR 62 to the CPR/MPR control card 55-2 on the ISDN line side (S
85). The message processing unit 71 of the CPR/MPR control card 55-2 analyzes the message 5ETUP and
It determines that it is a call setting request from the DN line 53 to the existing line 50, and sends message 5 ETUP to the protocol conversion processing section 72. The protocol conversion processing unit 72 converts the ISDN message SETUP into No and TAM (Initial) which is the message of the 7 common signaling system.
address, call setup request message).
9), and sends it to the existing exchange processing unit 78 through intersystem communication processing S8 (386).

The analysis section of the existing exchange processing section 78 analyzes the IAM signal sent from the ISDN line 53 side, and performs the corresponding internal processing.
That is, call setting processing is executed (S4). A message ACM (Address comp) is sent to the ISDN line side to notify that the reception of address information has been completed.
587), and also output a message CPG (Cal 587) that notifies the occurrence of an event during call setup.
l progress). These N
The message of the 017 common signaling system is transmitted to the CPR/MPR 55-2 of the ISDN line by the intersystem communication process S8.

The intersystem communication processing section 73 of the CPR/MPR 55-2 receives these messages and sends them to the protocol conversion processing section 72. The protocol conversion processing unit 72 converts the No. 7 common signaling message into an ISDN message (
S9). ACM is CALL PROC, CPG is A
Converted to LERT. The converted message is notified to the ISDN line side 53 via the message processing section 71 (S89.590).

The existing exchange processing unit 78 outputs the message CPG and executes a calling process for the existing line 50 (S91).

In other words, the internal process S4 sends the paging message to the existing line 5.
0 to the LPR 5B, and the LPR 58 executes processing to ring the ringer on the receiving side. Called party answers (off hook)
Then, the PR5B returns a response message to the existing exchange processing unit on the 7th (S92). The analysis unit 67 of the existing exchange processing unit 78 receives the response message as human information 77, generates a No. 7 common signaling message ANN indicating that there is a response (S4), and transmits the message to the ISDN line 53 through intersystem communication processing S8. Tell the other person (S
93).

ISDN line side CPR/MPR control card 5-
The intersystem communication processing unit 73 in 2 receives this message,
The message is sent to the protocol conversion processing section 72, and the protocol conversion processing section 72 converts the ANN into an ISDN message C0NN, and sends it to the ISDN line 53 side via the message processing section 71 (394).

A message C0NN ACK was returned confirming that message C0NN was received from the ISDN line (
At the time point S95), a communication path between the caller and the receiver is established. Message C0NN ACK may not be returned depending on the type of ISDN terminal.

The existing exchange processing unit 78 converts the response message ANN to ISDN.
After sending it to the line side, the existing line disconnection monitoring command is sent as output information 79 to the LPR 5B, and the LPR 5B monitors the disconnection of the line. Through the above processing, a communication path from the ISDN line 53 to the existing line 50 is established, and communication becomes possible.

[Problems to be Solved by the Invention] However, in the conventional system, in order to control the ISDN line, an adjunct method is adopted in which an ISDN exchange is externally attached to the exchange of the existing line and then connected via an intersystem communication line. There was a need. This system has the problem that software for circuit switching and other additional services must be developed separately for ISDN lines and for existing lines.

SUMMARY OF THE INVENTION An object of the present invention is to enable line control of an existing line and an ISDN line using only an existing line exchange without attaching an ISDN switch externally to the existing line exchange. That is, the purpose is to enable line control software for existing lines to be used for line control of ISDN lines.

[Means to solve the problem]

FIG. 1 is a functional block diagram of the present invention. The present invention
Existing line 1 and ISD to which telephones, terminal devices, etc. are connected
N line 7 and exchange 6 are assumed, and exchange 6 controls the existing line input/output control unit 2 that performs input/output control between existing line 1 and exchange 6, and control signals from existing line l as input information. An input information control unit 3, an existing line switching processing unit 4 that executes line switching processing for the existing line 10, and an output information control unit 5 that executes control to send control information output from the existing line switching processing unit 4 to the existing line 1. Motsu.

First, it has ISDN line input/output control means 8.

The ISDN line input/output control means 8 terminates layer 1 and layer 2 of the 031 reference model with respect to the ISDN line 7. In layer 1, characteristics and codes of electrical signals, frame configurations, bus control, power supply to users, etc. are matched to protocols for both information channels (B channels) and signal channels (D channels). Layer 2 uses Layer 1 to manage information transferred on the D channel between the terminal and the network.

Next, the message analysis means 9 analyzes the D channel information outputted by the ISDN line input/output control means 8,
It is converted into information in the same format as the input information input to the existing exchange processing section 4 from the input information control section 3 of the existing line 1, which can be processed by the existing exchange processing section 4. Then, the converted input information is sent to the existing exchange processing section 4.

The input information input from the message analysis means 9 to the existing exchange processing unit 4 is input information from the existing line 1 and the I
SDN time: Regardless of the input information from I7,
The basic control means IO in the existing exchange processing section 4 analyzes the content of the information and executes basic exchange processing. Basic control means 1
The processes executed by 0 include call state management, line idle management, data management, and path control. In addition, this basic control means 1
0 sends the output information generated by executing the switching process to an appropriate line, either the existing line 1 or the ISDN line 7.

Furthermore, the existing exchange processing section 4 has an application control means 11. The application control means 11 controls the existing line 1 and ISD which are analyzed by the basic control means 10.
Among the input information from the N line 7, the basic control means 1
Performs additional services other than the basic exchange processing performed by 0. The application control means 11 sends output information generated in accordance with the processing to the existing line 1 and the ISDN line 7 via the basic control means 10 as appropriate.

The message control means 12 receives the output information outputted from the existing exchange processing section (4) to the ISDN line 7. The output information received by the message control means 12 is in the format of the existing line 1. Therefore, the message control means 12
converts the received output information into an output message for ISDN line 7, edits the message, and sends it to ISDN line 7.
send to.

[For production]

If a telephone or terminal on the existing line 1 is the originator and another telephone or terminal on the existing line 1 is the destination, the existing line 1 sends the calling signal to the existing line input/output control unit 2. , the existing line input/output control unit 2 terminates the signal and sends it to the input information control unit 3.

The input information control section 3 converts the calling signal into logical input information (call setting request message) and inputs it to the existing exchange processing section 4. The basic control means 10 of the existing switching processing section 4 receives this call setup request message and executes circuit switching processing. That is, first, a message requesting the selected digits is sent to the calling side, the selected digits are received from the calling side, a calling message is sent to the called side, and when a response message is returned from the called side, the call is started. In this case, since the called side is also on the existing line, the message sent to the called side is sent as output information to the output information control unit 5, and the existing line input/output control unit 2 converts it into a signal for the existing equipment w, 1. Furthermore, existing line 1
will be sent to.

On the other hand, the calling party is on existing line 1 and the receiving party is on ISDN.
If it is on the line 7, the existing exchange processing unit 4 starts the call setting process, similar to the communication between the existing line 1 and the existing line 1 described above. First, a message requesting selected digits is sent to the calling party, and the selected digits are received from the calling party. When this selected number is received and analyzed by the basic control means 10, it can be determined that the called party is on the ISDN line 7. Therefore, the basic control means IO sends out the information to the called party on the ISDN line as output information. At this time, this call setup request message is a message of an existing line protocol.

The message control means 12 receives the call setting request message output from the basic control means 10, and transfers this message to the I/O.
After converting it to an SDN call setup request message,
The N@ line is sent to the input/output control means 8. Upon receiving this message, the ISDNOO line operator output control means 8 accesses a device such as a terminal on the called side on the ISDN line for call setup in accordance with the message. When the called party on the ISDN line 7 is in a communicable state, a response signal is returned to the ISDN line input/output control means 8 in response to the call setting access. The input/output control means 8 sends this signal to the message analysis means 9 as a logical response message. The message analysis means 9 converts this ISDN protocol message into an existing line message and sends it to the existing exchange processing section 4.

Through the above processing, the communication path from the existing line 1 to the ISDN line 7 is established, and communication is started.

On the other hand, if the originating side is on the ISDN line 7 and the called side is on the existing line 1, first, the ISDN liner 7 issues a call setup request message to the exchange 6. The rsDN line input/output control means 8 receives this message, terminates layer I and layer 2, and then terminates the message analysis means 9.
Enter your message in . The message analysis means 9 converts the message on the second ISDN line into a message on the existing line, and sends it to the existing exchange processing unit 4 as input information to the existing exchange processing unit 4.

In the existing exchange processing section 4, the input information sent from the message analysis means 9 is received, and first, the basic control means 10 analyzes this message. At this stage, ISDN line 7
It is determined that the request is for communication to the existing line 1.

The basic control means 10 executes a call setting process for the called party on the existing line 1. The output information generated at this time is
Send it to the ISDNu line side and the existing line side as appropriate. For example, the basic control means 10 sends a message to the calling side indicating that the call setting process is in progress, or a message indicating to the calling side that the called party is being called, to the ISDN line 7, and a message for calling the called party. is sent to existing line 1.

The message outputted by the basic control means 10 to the ISDN line 7 is a message in the format of the existing line. The message control means 12 receives this message, converts it into a message for the ISDN line, and edits it into a format that can be processed on the ISDN line. After that, messages in ISDN format will be sent to
It is sent to the N line person output control means 8, and the ISDN line input/output means 8 arranges the layer 1 and layer 2 formats, and
A signal is output to the ISDN line 7.

The output information of the nursing side calling command that the basic control means 10 outputs to the existing line l side is sent to the existing line input/output control unit 2 via the existing line output information control unit 5, and is sent to the existing line input/output control unit 2, it is shaped into a signal for the existing line 1 and sent to the called party on the existing line 1. A ringer rings on the receiving end. When the called party responds (off-footer), the signal is sent to the existing line input/output control unit 2, which determines that there is a response, converts it into a logical response message, and sends it to the existing line exchange processing via the input information control unit 3. The information is sent to section 4 as input information.

Through the above processing, a communication path from ISDN line 7 to existing line 1 is established, and communication begins.

Furthermore, both the calling and called parties are connected to the IS on the ISDN line.
In line switching control in the case of DN line 7→ISDN line 7, the basic control means 10 of the existing switching processing unit 4 executes the line switching process.

That is, the caller on the ISDN line 7 issues a call setup request message, and sends the call setup request message on the existing line to the existing exchange processing unit 4 via the ISDN line input/output control means 8 and message analysis means 9. The basic control means 10 of the existing switching processing section 40 analyzes this message, determines that both the calling side and the called side are on the ISDN line, and executes line switching processing. In addition to sending a call setup request message to the called party, a message indicating that the call setup process is in progress and a message indicating that the called party is being called is also sent to the calling party. Since both the calling side and the called side are on the ISDN line, the basic control means 10 transmits the message to the ISDN line.
Output to the DN line.

The message control means 12 receives these messages,
After converting the message into an ISDN message, the message is sent to the calling side and the receiving side via the ISDN line input/output control means 8, respectively. When the called party receives the call setup request message and returns a response message to the calling party, the communication path is established.
The call begins.

On the other hand, when the originating side wishes to enjoy an additional service provided by the exchange, the application control means 11 in the existing exchange processing unit 4 executes the service.

Additional services include three-way calling, camp-on, and pick-up.

When a telephone or terminal on the ISDN line 7 attempts to receive these additional services, the ISDN line input/output control means 8 executes termination of layer I and layer 2, similar to basic line switching processing. Furthermore, the message analysis means 9 converts the ISDN message into an existing line message, and the message control means 12 converts the existing line message into an ISDN message and edits it.

As a result, the application control means 11
Regarding the additional service for the DN@line 7, the same processing as for the additional service for the existing line 1 may be executed.

[Example] Hereinafter, an example will be described with reference to FIGS. 2 to 4.

FIG. 2 is a system configuration diagram of an embodiment of the present invention.

Broadly speaking, this system consists of an existing line 20 that accommodates existing line terminals and telephones, an ISDN line 21 that accommodates ISDN terminals and telephones, and an existing line trunk unit that terminates the signals of the existing line 20. 22.IS
IS that terminates layer 1 and layer 2 of the DN line 21
DN line trunk unit 23, existing line 2
a network 24 that transmits information channels and signal channels of the existing line 20 and the ISDN line 21;
It consists of an MPR (Management PROcess) control card 25.

The existing line trunk unit 22 is an LPR (
The LPR 26 terminates the signal on the existing line 20. As a result, the output of the existing line trunk unit 22 is separated into a communication path 27 and a signal path 28 for transmitting control signals, etc., and connected to the network 24. The signal path 28 is connected to the network 2
It is connected to the CPR/MPR control card 25 via 4.

On the other hand, the ISDN line trunk unit 23 includes a layer I termination section 29 and an LPR (line processor).
Consists of 30. From ISDN line 21, there is an information channel (
A signal including a B channel) and a signaling channel (D channel) is input to the ISDN line trunk unit 23, and first, the layer 1 termination unit 29 electrically and physically terminates both the information channel and the signaling channel. .

Layer 1 termination section 29 is an information channel (B channel 31)
and signal channel (D channel), LPR3
0 terminates layer 2 of the D channel and is connected to the network 24.

Layer 2 is a data link layer, and is a part that manages information transfer in order to realize transparent transfer of information sent and received between the terminal and the network via the D channel.

Based on X, 25LAPB, the I interface features simultaneous connection of multiple terminals and simultaneous provision of multiple services.
LAPD (Link
Access Procedure on
D-chan, nel) protocol is used.

The B channel 31 is connected to the network 24, and the D channel information signal path 32 is connected to the CP via the network 24.
It is connected to the R/MPRIII control card 25.

The CP R/M PR control card 25 connects the existing line 20
an input information control unit 33 that controls input to the CPR/MPR control card 25 with respect to the signal on the signal path 28;
an output information control unit 34 that controls the output of information to the IS;
CPR/MPR for D channel 32 of DN line 21
An ISDN protocol processing unit 41 that controls input/output with the control card 25, a basic control unit 37 that performs basic exchange control of the existing line 20 and the ISDN line 21, and various additional services other than basic exchange processing. Application control unit 3B (3B-1, 38-2,...
, 3B-n), an internal processing section 39 (3
9-1, 39-2, ..., 39-n). The internal processing unit 39 uses an output macro 40 (40
-1,402,...,4O-n).

The ISDN protocol processing unit 41 uses the CPR/MPR control card 25 for the D channel 32 of the ISDN line 21.
It consists of a message analysis section 35 that controls input to the D channel, and a message control section 36 that controls information output to the D channel.

The basic control unit 37 and the application control unit 38 execute switching processing and additional service processing for the existing line 20 and ISDN line 21 as existing line processing (existing switching processing unit 42). In other words, the basic fee? The input information input to the f11 unit 37 and the output information output from the basic control unit 37 are in the format of the existing line.

For this purpose, the message analysis unit 35
The message of D channel 32 sent from 1 is replaced with the message (input information) of existing line 20 that has the same meaning.
and sends the converted message to the basic control unit 37. Further, the output information output from the basic control unit 37 is
In the case of the SDN line 21, the message control unit 36
converts the output information into a message on the ISDN line 21 having the same meaning and sends it to the network 24.

FIG. 3 is a principle diagram of one embodiment, and along this
The operation of the system shown in the figure will be explained.

First, signals output from or input to the existing line 20 are subjected to existing line input/output control S30 in the existing line line trunk unit 22. Also,
Signals inputted from the existing line 20 after being subjected to the existing line input control S30 are subjected to input information control processing 331 in the human power information control unit 33 when input to the CPR/MPH control card 25.
After receiving the information, it is input to the existing exchange processing section 42. Also,
The output information output from the existing exchange processing unit 42 to the existing line 20 is controlled by the output information control unit 34 (output information control 532), and the existing line input/output control S30 is controlled by the existing line line trunk unit 22. Existing line 2
Sent to 0.

In the existing exchange processing unit 42, the basic control unit 37 executes basic line control processing (basic control 533), and the application control unit 38 executes additional service processing (application control 534). Furthermore, in accordance with the basic control process S33 of the basic control unit 37 and the application control process S34 of the application control unit 38, an internal process S35, which is a substantial process, is executed in combination with an output macro.

On the other hand, the signals sent from the ISDN line 21 and the signals sent to the ISDN line 21 are
ISDN line input/output control processing S36 is performed in the trunk unit 23. and CPR/MPR111
The ISDN protocol processing unit 41 in the 111 card 25 receives ISDN line input/output control processing and processes the network 2
Processing (message analysis 537) in which the input message sent via the existing exchange processing unit 42 is analyzed by the message analysis unit 35 and converted into a message for the existing line 21, and a message destined for the ISDN line 21 output from the existing exchange processing unit 42. The message control unit 36 converts the message into the ISDN format and edits the message (message control 838).
is executed. The message edited in message control processing 338 is subjected to ISDN line input/output control processing S36 in ISDN line trunk unit 23, and then sent to ISDN line 21.

FIG. 4 is a sequence diagram of one embodiment. The operation of the system shown in FIG. 3 will be explained along this sequence diagram.

Figure 4(a) shows IS from a telephone or terminal on the existing line 20.
FIG. 3 is a sequence diagram when making a call to a telephone or terminal on the DN line 21. FIG.

First, a calling signal is transmitted from the existing line 20, subjected to existing line input/output control processing S30 in the existing line line trunk unit 22, and then manually inputted to the CPR/MPR control car 1-25. This calling signal is input information control processing 3
31 and is input to the existing exchange processing unit 42 (S40
). This input information is a basic exchange processing request, so
Here, the basic control unit 37 is operated (basic control 533)
.

The basic control unit 37 first analyzes this input information and outputs a message requesting the selected number, which is the destination address, to the sender (S41). This message is subjected to output information control processing S32 in the output information control unit 34, and is sent to the existing line line/trunk unit 22 via the network 24, and is sent to the existing line input/output control processing S30.
It is then sent to the originator on the existing line 20.

The sender receives this selected number request message and returns the selected number (S42). Selected numbers include existing circuit line trunk unit 22 and network 24, CPR/
The information is input to the existing exchange processing section 42 via the input information control section 33 of the MPR control card 25.

The basic control unit 37 of the existing exchange processing unit 42 receives this number and issues a call setup request to the called destination (343). In this case, since the destination is on the ISDN line 21, the basic control section 37 outputs a call setup request message to the message control section 36 of the ISDN protocol processing section 41 (basic control processing 533). The message control unit 36 converts the existing line format call setup request message input from the basic control unit 37 into an ISDN format call setup request message (SE
TUP) and message control 538), network
It is sent to the receiving side on the ISDN line 21 via the work 24.

The called party sends this 5ETUP message to network 2.
4 and ISDN line trunk unit 23
First, the process for setting up the call is started, and a message CALL PROC is sent to the calling party to inform that the call setting process is in progress (S44). Furthermore, after the call setting process, a process for calling the called party is executed, and a message ALERT is output to inform that the called party is being called (S45). However, Metsu, Sage CALL PR
OC and ALERT are not output depending on the type of ISDN terminal on the receiving side.

The called party sends the message CALL PROC and ALE
When outputting RT, these messages reach CPR/MPR control card 25 via ISDN line trunk unit 23 and network 24. Message analysis section 3 of CPR/MPR control card 25
5 analyzes these messages, converts them into existing line input information, and sends it to the basic control unit 37 (S37). The basic control unit 37 receives these input information and confirms that call setting processing is being executed on the called side.

The called party on ISDN line 21 calls and sends a message ALE.
Upon receiving and responding to RT, a response message C0NN is output (S46). Message C0NN is sent to CPR/MPR control card 25 via ISDN line trunk unit 23 and network 24. Message analysis section 3 of CPR/MPR control card 25
5 analyzes this message, converts it into input information of the existing line, and inputs it to the basic control unit 37 (337).

Through the above processing, the communication path 27 between the outgoing call and the incoming call is established. The basic control unit 37 outputs output information indicating that this message has been received to the called party (S47). This output information is converted by the message control unit 36 into an ISDN message C0NNACK (message corresponding to the CONN message) (S38), and is returned to the receiving side on the ISDN line 21 via the network 24.

The basic control unit 37 also outputs a communication path disconnection monitoring request to the originating side as output information (348). This output information is sent to the existing line 20 via the output information control section 34 - network 24 - existing line trunk unit 22 . When the calling party on the existing line 20 receives this message, call processing is completed and the call is started.

On the other hand, FIG. 4(b) is a sequence diagram of call processing when the calling party is a terminal or telephone on the ISDN line 21 and the receiving party is a terminal or telephone on the existing line 20.

First, the originating side on the ISDN line 21 sends a call setup request message 5ETUP to the exchange (S50). This message is transmitted via ISDN line trunk unit 23 and network 24 to CPR/MPR.
The message is input to the message analysis section 35 of the control card 25.

The message analysis unit 35 analyzes the ISDN message 5
Converts ETUP into input information of the existing line and sends it to the basic control unit 3.
7 (S37).

The basic control unit 37 receives this input information, starts call setting processing, and outputs output information indicating the start to the calling side. This output information is sent to the message control unit 36 from the ISDN message CALL PROC indicating that the call setup process is in progress.
538), 24 and ISD
ISD via N line trunk unit 23
It is sent to the calling party on the N line (S51).

The basic control unit 37 also outputs output information requesting a call to the called party on the existing line 20.

This output information is subjected to output control processing by the output information control unit 34 (S32), and the output information is outputted to the network 24 and the existing line line.
It is sent to the called party on the existing line 20 via the trunk unit 22, and a ringer is sounded (S52). At this time, the basic control unit 37 outputs output information to inform the calling party that a call request has been made to the receiving party. This output information is sent to the ISDN message ALERT by the message control unit 36.
(33B) and sent to the originating side on the ISDN line 21 via the network 24-ISDN line trunk unit 23 (S53).

The called party on the existing line 20 responds to the ringer's call (off-footer). The response signal is sent to the CP via the existing circuit line trunk unit 22-ne sitework 24.
Sent to the R/MPR control card 25 (S54), CP
In the R/MPR control card 25, the input information control section 33 receives this response message and sends it to the basic control section 37.

Upon receiving the response from the called party, the basic control unit 37 outputs output information informing the calling party that the communication path has been established. The message control unit 36 converts this output information into an ISDN message C0NN and transmits it to the calling side on the ISDN line 21 (S55). When the calling party receives the message C0NN, it sends a C0NN AC to notify that it has received the C0NN.
Return the K message to the CPR/MPR control card 25 (
S56). This message C0NN ACK may not be output depending on the type of terminal on the calling side.

Upon receiving the response from the called party, the basic control unit 37 notifies the calling party that the communication path has been established, and also sends a command to the called party to perform disconnection monitoring as output information (3
57). This output information is sent to the called side on the existing line 20 via the output information control unit 34 - the network 24 - the existing line trunk unit 22.

Through the above processing, the call setting from the ISDN line to the existing line is completed, and a call is started.

〔Effect of the invention〕

According to the present invention, an ISDN exchange can be externally attached by adding software that converts messages on an ISDN line to information on an existing line and software that outputs output information of an existing line to the existing line and the ISDN line as appropriate. This makes it possible to perform line switching processing without having to do so. Additionally, additional services other than basic switching processing can be performed without being aware of ISDN lines and existing lines.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram of the present invention, Figure 2 is a system configuration diagram of one embodiment. FIG. 3 is a principle diagram of one embodiment. FIG. 4 is a sequence diagram of one embodiment, Figure 5 is a system configuration diagram of the conventional system. Figure 6 is a diagram of the principle of the conventional method. FIG. 7 is a sequence diagram of the conventional method. 1...Existing line, 2... Existing line input/output control unit, 3...input information control unit, 4...Existing exchange processing section, 5...output information control unit, 6...exchange machine, 7...ISDN line, 8...ISDN line input/output control unit, 9　・・ 10・ 11・ 12・ message analysis means, basic control means, application control l1 means; Message control means.

Claims (1)

[Claims] 1) An existing line input/output control unit (2) that terminates the line of the existing line (1), and an input information control unit (3) that analyzes input information input from the existing line (1). ), an existing exchange processing section (4) that performs internal processing according to the analysis result by the input information control section (3), and an output information control section (5) that edits the output information from the existing exchange processing section (4). 6
), ISDN line input/output control means (8) for terminating the ISDN line (7) at the layer 1 and layer 2 levels of the layer protocols of the OSI (Open Systems Interconnection) reference model; 7) through the ISDN line input/output control means (8), and analyzes the input message of the D channel protocol that is input from the ISDN line input/output control means (8), and converts it into a message similar to the existing line (1) that can be processed by the existing exchange processing unit (4). According to the message analysis means (9) that converts into input information, and the input information from the existing line (1) and the ISDN line (7), call status management, line blockage management, data management,
A basic control means (10) that executes basic exchange processing consisting of bus control; and an application control means (11) that executes additional service processing according to input information from the existing line (1) and the ISDN line (7). , a message control means (12) for receiving output information for the existing line (1) from the existing exchange processing unit (4) and editing an output message for the ISDN line (7). Line control method. 2) The ISDN line control according to claim 1, wherein the message analysis means (9) passes the ISDN protocol message to the message control means (12) when processing by the existing exchange processing section (4) is not required. method. 3) The basic control means (10) is an ISDN line (7)
2. The ISD according to claim 1, wherein the basic exchange processing is performed using the same basic exchange processing software as that of the existing line (1).
N line control method. 4) The basic control means (10) determines whether input information is from the message analysis means (9) of the ISDN line (7) or from the input information control unit (3) of the existing line (1). If the information is input from the ISDN line (7), the output information is sent to the message control means (12), and the output information is sent to the message control means (12) from the input information from the existing line (1). 2. The ISDN line control system according to claim 1, wherein in the case of information, the information is passed to an output information control section (5) of an existing line. 5) The application control means (11) is an ISD
The ISDN line control system according to claim 1, wherein additional service processing is executed without being aware of the N line (7) and the existing line (1).