JP3471305B2 - A routing method integrating a telephone network and an IP network, and an exchange of the telephone network using the routing method - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a subscriber telephone network and an IP.
The present invention relates to a network-integrated routing method and a switch of a subscriber telephone network using this routing method.

[0002]

2. Description of the Related Art Conventionally, most routing of communication lines is performed by circuit switching in a subscriber telephone network. This circuit switching is routed based on the telephone number. Not only voice, but also fax and modem data can be routed and connected for communication using normal telephone numbers.

At present, VoIP (Voice Over) for realizing voice communication on an IP network (Internet network)
r Internet Protocol) and FAX
FAX-IP (FAX-Int) that realizes communication by IP network
Internet Protocol) and the like have been developed.
Using these technologies, communication such as voice and FAX can be
If it becomes possible to use the P network, it will be possible for the telecommunications carrier to select one of the subscriber telephone network and the IP network in the future. For example, connection via the Internet is also conceivable, such as detouring the line. Voice is generally inferior in quality, but communication is possible in the VoIP section on the IP network.

[0004]

However, at present, when performing voice communication using the IP network, after dialing and connecting to the IP connection operator (provider), the telephone number of the other party is dialed again. It is necessary to perform operations such as asking for permission. In this case, a dial number (via a provider) is used as a determination to connect from the telephone network to the IP network.

That is, the network is selected by the instruction of the caller that the telecommunications carrier does not know, and what is the transmission target on the telecommunications carrier side (voice, FAX, other It is not possible to judge whether it is the transmission data of. Therefore, it is impossible to freely switch the network between the subscriber telephone network and the IP network without the instruction of the caller. This is because, for example, voice communication can be performed in the VoIP section, but data communication such as FAX and modem used in other telephone networks is not guaranteed. Also, when using the IP network, it is used via a provider in advance. Therefore, even if the existing network is disconnected due to some cause (fault, disaster, congestion, etc.), for example, in the case of voice, the telecommunications carrier physically sends a voice signal to the VoIP section of another IP network. You can pass it, but you can't really get around there.

For the subscriber, the subscriber telephone network and IP
If it doesn't matter which network you use for communication,
There may be cases such as when connection priority is given. In these cases,
As a telecommunications carrier, I want to use the line equipment effectively. However, even if a call that has been routed in the telephone network is routed to the IP network as it is, some communication is not guaranteed as described above.

The present invention has been made in view of the above points and enables routing from a subscriber telephone network to an IP network.
The present invention provides a routing method in which a subscriber telephone network and an IP network that can appropriately perform the routing are integrated, and a switch of the subscriber telephone network using the routing method.

[0008]

The subscriber telephone network of the present invention and I
The routing method that integrates the P network is a routing method between the telephone network and the IP network by the common line signaling method, and when the communication is performed from the calling side terminal to the receiving side terminal, the common line signaling method is used. An address signal, which is one of the control signals used for routing of the telephone network, includes a connection-related parameter serving as a criterion for the routing from the subscribed telephone network to the IP network, and the subscription based on the connection-related parameter. A feature is that the routing from the telephone network to the IP network is performed.

Further, in the routing method integrating the subscriber telephone network and the IP network according to the present invention, the connection-related parameter is a criterion for a subscriber to request, allow or deny the routing from the subscriber telephone network to the IP network. In addition, when the routing to the IP network is requested or permitted, it is a criterion for the type of the communication line in the IP network.

Further, in the routing method in which the subscriber telephone network and the IP network are integrated according to the present invention, the connection-related parameter is set according to a special number input to the calling terminal.

Also, in the routing method of the present invention in which the subscriber telephone network and the IP network are integrated, one of the special numbers is
It is for prohibiting routing from the subscriber telephone network to the IP network.

Further, in the routing method of integrating the subscriber telephone network and the IP network of the present invention, the connection-related parameters associated with the subscriber are set in the subscriber database in the originating exchange of the subscriber telephone network. It is characterized by storing data as a reference for

Further, in the routing method of the present invention in which the subscriber telephone network and the IP network are integrated, the IP telephone is connected from the subscriber telephone network.
The feature is that the caller is made to select the type of communication line to be used by the voice guidance when routing to the network.

Further, the present invention is an exchange for a subscriber telephone network using a common line signaling system, wherein the exchange is connected to an IP network via a connection point, and the originating exchange is from the originating terminal to the terminating terminal. When the communication is performed with the common line signaling system, an address signal, which is one of the control signals used for routing the subscriber telephone network, is used as a connection-related parameter that serves as a criterion for the routing from the subscriber telephone network to the IP network. Including the above, the originating exchange or the relay exchange performs the routing from the subscriber telephone network to the IP network based on the connection-related parameter.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a network configuration diagram of a common line signaling subscriber telephone network and an IP network using a routing method in which the subscriber telephone network and the IP network of the present invention are integrated.

In FIG. 1, the common telephone signaling subscriber telephone network comprises an originating exchange 3, a relay exchange 5, and a destination exchange 4. Further, in FIG. 1, the IP network is a gateway server (GW) 6 that serves as a connection point (interface) with a switchboard of a subscriber telephone network, and a FAX-IP for providing a FAX communication service on the IP network.
FAX-IP server 8 and a VoIP server 7 by VoIP for providing a voice communication service on the IP network. Of course, each network includes other exchanges / control devices, servers, etc. not shown. Further, in FIG. 1, the originating side terminal 1 is connected to the originating side exchange 3 and the destination side terminal 2 is connected to the destination side exchange 4, and the originating side terminal 1 and the destination side terminal 2 are connected to a subscriber telephone network or further IP.
Connected via the network.

In this embodiment, in the originating exchange 3, an address signal (IAM (Initial Address M) sent from the originating exchange 3 (originating node) is transmitted.
message): In the common line signaling method, one of the control signals used for routing between the exchanges) is set by including the newly provided connection-related parameter below. Then, each exchange (calling side exchange 3, relay exchange 5) performs routing (exchange processing) between the subscriber telephone network and the IP network based on the connection-related parameters. This connection-related parameter is a special number dialed by the caller,
Alternatively, it is set based on the data relating to the subscriber registered in advance in the subscriber database described later. The special number is dialed and dialed into the calling terminal 1 before dialing the called telephone number. In the present embodiment, the subscriber telephone network and the IP are based on the connection-related parameters.
Routing between the networks is performed, but routing between the respective exchanges in the subscriber telephone network is performed by a usual method.

Next, an example of connection-related parameters will be described. -Setting example of connection-related parameter (1) In the following example, the information element of the IP network request display as the connection-related parameter is set on the address signal (IAM). Here, “allowing an IP network ...” means that an IP network may be used. Further, “requesting the IP network ...” means that the use of the IP network is requested by the caller.

Further, examples of services corresponding to the set values in this setting example are as follows.

Setting Example of Connection Related Parameter (2) In the following example, the information elements of the IP network request display and the IP communication line request display are set as the connection related parameters on the address signal (IAM). In this example, IP
It is assumed that the IP communication line request display is valid when the network request display is permitted or requested.

Further, examples of services corresponding to the set values in this setting example are as follows. The above-mentioned telephone and FAX are telephone services and FAX services in the subscriber telephone network.

As described above, each exchange uses the connection-related parameters set in the address signal (IAM) to perform the switching process from the subscriber telephone network to the IP network and the service (data communication / voice (telephone), FAX, ) Line selection becomes possible.

Next, the operation of the network composed of the common line signaling subscriber telephone network and the IP network configured as described above will be described. In the following description, the connection-related parameter shown in the connection-related parameter setting example (2) is used.

First, an example of a method for setting connection-related parameters will be described. 1. By the caller dialing with a special number (special number: 00XX) before the telephone number (callee telephone number),
The IP network request display and the IP communication line request display associated with this special number are set as follows.

2. If the IP network request display is allowed, IP
When connecting to the network, I
The type (voice / FAX) of the communication line of the P network is selected (for example, the caller presses the push button corresponding to the selection and receives the PB sound). Then, the IP network communication line request display is set according to the selection instruction. Of course, the default setting may be determined in advance and the IP network communication line request display may be set regardless of the voice guidance.

A subscriber who does not want to be detoured to the IP network has data (I
P network rejection data) can be registered. In this case, only the special number requesting the use of the IP network is bypassed to the IP network. When detouring to the IP network, the detouring originating exchange 3 or transit exchange 5 sends a voice guidance to the caller to select the type of communication line.

The IP network rejection data is stored in the subscriber database in the originating exchange 3 in association with each subscriber. The originating exchange 3 sets the connection related parameters of the address signal based on the IP network rejection data. I
The registration / cancellation of the P network rejection data can be changed by the user himself. As a result, the subscriber who refuses to use the IP network does not need to dial the special number every time, and the convenience of the user can be improved. Below, an example of the operation of the caller and the operation of the exchange when registering / releasing the IP network rejection data will be described (see FIG. 2).

1. The calling terminal 1 dials the IP network rejection data change special number (1XY). The IP network rejection data special number (1XY) is set by the telecommunications carrier,
A dial number for the subscriber to connect to the originating exchange 3 in order to register / cancel the IP network rejection data in the subscriber database.

2. The originating exchange 3 receives the IP from the originating terminal 1.
When the network rejection data special number (1XY) is received, the voice guidance device sends to the originating terminal 1 voice guidance prompting an operation for registering, changing, or canceling the IP network rejection data. According to this voice guidance, the sender further dials the number 0 for registration when registering the IP network rejection data. When canceling the registration, the number 1 for canceling the registration is further dialed.

3. The originating exchange 3 has a number 0 for registration.
Alternatively, when the number 1 for canceling the registration is received, the IP network rejection data corresponding to the subscriber in the subscriber database is set (registered / released).

The above is an example only when the use of the IP network is refused, but in addition, the default setting when the user himself does not dial the designation of the most used network or the special number is always stored in the subscriber database. Registration, change,
It may be possible to cancel. As a result, the caller does not need to dial the special number, and the work of the telecommunications carrier can be made more efficient. Also, the user can freely change the setting at any time, even if the way of using the communication line is changed. In particular, it is particularly effective when the use of the communication line used on the calling side is fixed (for example, FAX only).

Next, the connection-related parameter setting processing (shown in the connection-related parameter setting example (2)) in the originating exchange 3 will be described with reference to the flowchart of FIG.

First, the originating exchange 3 determines the type of special number received from the originating terminal 1 (IP network reject special number / IP network request special number / no special number (other than IP connection related special number)) (step S1). Here, each of the IP network rejection special number and the IP network request special number is 00 × 0 or 00 in the example shown in the example of the method of setting the connection-related parameter shown in the setting example (2) of the connection-related parameter. × 1/00 × 2
Corresponding to.

When it is determined in step S1 that the special number received by the originating exchange 3 is other than the IP connection-related special number, it is determined whether the sender is the IP network rejection data registrant (step S2). Whether the received special number is an IP network rejection special number or not in step S1
If it is determined that the sender is the IP network rejection data registrant, the IP network request display is set to 2 (= reject) (step S3). A call for which the IP network request display is set to 2 is communicated only on the subscriber telephone network.

Next, in step S2, the sender is I
If it is determined that the user is not the P network rejection data registrant, 0 (= permissible) is set in the IP network request display (step S4).
Then, it is determined whether or not to detour from the originating exchange 3 to the IP network (step S5). This determination is made in the originating exchange 3 according to the state of the communication line. With this judgment,
If it is determined to be NO (there is no detour from the originating exchange 3 to the IP network), the call is passed to the transit exchange 5. When bypassing from the repeater exchange 5 to the IP network, voice guidance is sent from the repeater exchange 5 side to the caller, prompting the caller to select the type of communication line (FAX / voice). Then, according to the type of the communication line selected by the caller, the transit exchange 5 routes the IP network to the Internet FA of the IP network.
X or internet telephone.

Further, in the determination of step S5, YES (I
If it is determined to detour to the P network), voice guidance is played and the caller is made to select the type of communication line (step S6). In addition, it is determined in step S1 that the originating exchange 3
When it is determined that the received special number is the IP network request special number, 1 (= request) is set in the IP network request display (step S7).

Then, step S6 or step S7
After that, it is determined whether the type of communication line is FAX or voice (step S8). This determination is made when the special number received by the originating exchange 3 is an IP network request special number ("00x1" or "00x2" in the above setting example).
Otherwise, if not, based on the type of communication line selected by the caller, as described above.

If it is determined in step S8 that the type of communication line is voice, 0 (= voice) is set in the IP network communication line request display (step S9).
In addition, the type of the communication line is FAX according to the determination in step S8.
If it is determined that the IP network communication line request display 1
(= FAX) is set (step S10). In this way, a call for which the IP network request display is set to 1 and the IP communication line request display is set to 0 is sent from the originating exchange 3 or the transit exchange 5 to the IP network and communicated by the Internet telephone in the IP network. . Similarly, the IP network request indication is 1, IP
A call for which the communication line request display is set to 1 is communicated by the Internet FAX in the IP network. The operation flow described above is an example, and the operation flow is not limited to the above processing flow.

Next, the flow of signals in data communication, FAX communication, and voice communication, and the operation of each device constituting the network consisting of the common line signaling type subscriber telephone network and IP network shown in FIG. Will be described with reference to the drawings.

[In the case of data communication on the subscriber telephone network] Next, when data communication is performed on the subscriber telephone network that does not use the IP network, the IP network request display is 2 (= IP network rejection: special number is 00 × 0), the signal flow (FIG. 4 :) is shown in FIG.
The sequence diagram will be described with reference to FIG. The flow of signals described below is the same in the case of voice communication that does not route from the subscriber telephone network to the IP network.

First, the calling signal, the dial tone, the special number (00 × 0) and the called telephone number are sent from the calling side terminal 1 to the calling side exchange 3.
When sent to the (originating node), the originating exchange 3 displays 2 (IP) in the IP network request display included in the address signal (IAM).
(Rejection of network) is set, and an address signal (IAM) including this IP network request indication is transmitted to the transit exchange 5 (relay node). The transit exchange 5 in the subscriber telephone network sequentially delivers this address signal (IAM) to the next transit exchange 5 and sends it to the destination exchange 4 (the destination node). Each transit exchange 5 has an IP
Since the network request display is set to 2 (= IP network rejection), the communication line is not diverted to the IP network.

When the address signal (IAM) reaches the destination exchange 4, the destination exchange 4 sends an address completion signal to the originating exchange 3 via the transit exchange 5. Also,
After the address completion signal is transmitted from the destination exchange 4, the destination exchange 4 calls the destination terminal 2, and a ringback tone is transmitted to the source terminal 1 via each exchange. When an incoming call signal is sent from the destination terminal 2 to the destination exchange 4, a response signal is sent from the destination exchange 4 to the originating terminal 1 via the transit exchange 5 and the originating exchange 3, and the originating terminal 1 is established between the destination terminal 2 and the destination terminal 2, and data communication is performed between the source terminal 1 and the destination terminal 2.

When the disconnection signal is sent from the calling side terminal 1, the disconnection signal is sent from the calling side exchange 3 to the receiving side exchange 4 via the transit exchange 5. Then, a recovery completion signal is sent from the destination exchange 4 to the originating exchange 3 via the transit exchange 5, and the communication is terminated. For data communication on the subscriber telephone network, for which the protocol is not supported by the IP network, by setting the IP network request display to 2 (= reject), the existing communication is not bypassed to the IP network. Routing can be performed only by the subscriber telephone network.

[In case of FAX communication] Next, in case of performing FAX communication, when the IP network request display is 1 (= IP network request) and the IP network communication line request is 1 (when the special number is 00 × 2) Fig. 6: shows the signal flow of Fig. 6, and Fig. 6: shows the signal flow when the IP network request display is 0 (= IP network allowed) and the IP network communication line request is 1 (special code is 00x3). ing. The operation sequence is shown in FIG.

The operation sequence shown in FIG. 7 differs from the above-mentioned operation sequence in the case of data communication (FIG. 5) when the IP network request display is 1 (= IP network request) and I
When the P network request display is 0 (= IP network allowed) and when routing from the subscriber telephone network to the IP network (when bypassing the IP network), the originating exchange 3 (originating node) or the transit exchange 5 The only difference is that signals are transferred from the (relay node) or the destination exchange 4 (the destination node) to the gateway server 6 (not shown in FIG. 7) and the FAX-IP server 8 of the IP network. When the IP network request display is 0 and there is no routing to the IP network, the operation sequence is the same as that in the case of data communication described above.

When the caller requests the use of the Internet FAX, as shown in FIG. 6, the originating exchange 3 routes the IP network directly or the transit exchange 5 routes the IP network. It If the caller permits the use of the IP network and the IP network can be used when making a detour, as shown in FIG.
Alternatively, it is routed from the transit exchange 5 to the IP network, and when there is no need to make a detour, the routing is performed using the subscriber telephone network as usual. Since the type of the communication line can be determined by the IP network communication line request display, the communication is guaranteed even when routed to the IP network.

[Voice Communication] Next, when voice communication is performed, the IP network request display indicates 1 (= IP network request) and IP.
FIG. 8 shows the signal flow when the network communication line request is 0 (the special code is 00 × 1), and the IP network request display is 0 (=
FIG. 8: shows the signal flow when the IP network is allowed) and the IP network communication line request is 0 (there is no special number). Moreover, the operation sequence is shown in FIG.

The operation sequence shown in FIG. 9 differs from the above-described operation sequence in the case of FAX communication (FIG. 7) when the IP network request display is 1 (= IP network request) and I
When the P network request display is 0 (= IP network allowed) and when routing from the subscriber telephone network to the IP network (when bypassing the IP network), the originating exchange 3 (originating node) or the transit exchange 5 The only difference is that signals are transferred from the (relay node) or the destination exchange 4 (the destination node) to the gateway server 6 (not shown in FIG. 9) and the VoIP server 7 of the IP network. When the IP network request display is 0 and there is no routing to the IP network, the operation sequence is the same as that in the case of data communication described above.

When the caller requests the use of the Internet telephone, as shown in FIG. 8 :, the originating exchange 3 routes the IP network directly or the transit exchange 5 routes the IP network. It If the caller permits the use of the IP network and the IP network can be used at the time of detour, the originating exchange 3 or the transit exchange 5 routes the IP network as shown in FIG. If not, it is routed as usual using the subscription telephone network. Since the type of the communication line can be determined by the IP network communication line request display, the communication is guaranteed even when routed to the IP network.

Although the embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and includes a design etc. within the scope not departing from the gist of the present invention. Be done.

[0051]

As described above in detail, according to the present invention, one of the control signals used for the routing of the subscriber telephone network by the common line signaling method when the communication is made from the calling terminal to the called terminal. To the address signal which is
Based on this connection-related parameter, including the connection-related parameter that is the basis of the judgment for routing to the P network,
Since the subscriber telephone network is routed to the IP network, the telecommunications carrier and the subscriber can select and use the IP network in addition to the subscriber telephone network.

Further, according to the present invention, the connection-related parameter is a criterion for requesting, permitting or rejecting by the subscriber with respect to routing from the subscriber telephone network to the IP network, and the communication line of the IP network. Since this is a criterion for determining the type, if the routing from the subscriber telephone network to the IP network is requested or permitted, the telecommunications carrier
It is possible to provide the subscriber with communication via an IP network with low communication cost, and to bypass the communication line to the IP network in the event of a failure, disaster, or congestion. Further, by rejecting the routing to the IP network, the subscriber can avoid the problem that communication cannot be performed due to the use of the IP network.

Further, according to the present invention, since the setting is made according to the special number inputted to the calling side terminal, the subscriber can request, allow or refuse to use the IP network. Can be arbitrary. Further, according to the present invention, the subscriber database in the originating exchange of the subscriber telephone network stores data as a reference for setting connection-related parameters associated with the subscriber. Sets connection-related parameters when not dialing a special number,
It can be arbitrarily specified in advance.

[Brief description of drawings]

1 is a common line signaling subscriber telephone network using a routing method in which the subscriber telephone network and the IP network of the present invention are integrated;
It is a network block diagram which consists of P network.

FIG. 2 is a diagram illustrating setting of IP network rejection data.

FIG. 3 is a flowchart illustrating an example of a connection-related parameter setting process in the originating exchange.

FIG. 4 is a diagram showing a signal flow when performing data communication on a subscriber telephone network.

FIG. 5 is an operation sequence diagram between each device when performing data communication on the subscriber telephone network.

FIG. 6 FAX on the subscriber telephone network or further on the IP network
It is a figure which shows the flow of the signal at the time of communicating.

FIG. 7 FAX on the subscriber telephone network or further on the IP network
It is an operation sequence diagram between each device when performing communication.

FIG. 8 is a diagram showing a signal flow when voice communication is performed on a subscriber telephone network or further on an IP network.

FIG. 9 is an operation sequence diagram between each device when voice communication is performed on the subscriber telephone network or further on the IP network.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Calling terminal (calling terminal) 2 ... Calling terminal (calling terminal) 3 ... Calling switch (calling node) 4 ... Calling switch (calling node) 5 ... Transit switch (switching node) 6 ... Gateway server (GW) 7 ... VoIP server 8 ... FAX-IP
server

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shinya Serizawa, 9-1 Konan, Minato-ku, Tokyo NT Communication Communication Co., Ltd. (72) Inventor Kintai Fukuda Konan, Minato-ku, Tokyo Chome 9-1 NTT Communication Wear Co., Ltd. (72) Inventor Noriaki Jinuchi 1-9-1 Konan, Minato-ku, Tokyo NTT Communication Wear Co., Ltd. (56) Reference Documents JP 2000-174825 (JP, A) JP 2000-184411 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04L 12/00-12/26 H04L 12/50- 12/66 H04M 3/00 H04M 3/16-3/20 H04M 3/38-3/40 H04M 7/00-7/16

Claims (7)

(57) [Claims] 1. A subscriber telephone network using common line signaling, and
A routing method with a P network, wherein when a call is made from a calling side terminal to a called side terminal, the address signal, which is one of the control signals used for routing of a subscriber telephone network by a common line signaling method, is added to the address signal. A subscriber telephone network including a connection-related parameter serving as a criterion for determining a routing from a telephone network to an IP network, and performing routing from the subscriber telephone network to the IP network based on the connection-related parameter. A routing method integrating an IP network. 2. The connection-related parameter serves as a criterion for a subscriber to request or allow or deny a routing from a subscriber telephone network to an IP network, and when routing to the IP network is requested or permitted, 2. The routing method according to claim 1, wherein the routing method is a criterion for determining the type of communication line in the IP network. 3. The integrated telephone network and IP network according to claim 1 or 2, wherein the connection-related parameter is set according to a special number input to a calling side terminal. Routing method. 4. The subscriber telephone network and the IP network according to claim 3, wherein one of the special numbers is for prohibiting routing from the subscriber telephone network to the IP network. Routing method. 5. The subscriber database in the originating exchange of the subscriber telephone network stores data as a reference for setting the connection-related parameter associated with the subscriber. A routing method in which the subscriber telephone network according to any one of claims 1 to 4 and the IP network are integrated. 6. The caller is made to select the type of communication line to be used by voice guidance when routing from the subscriber telephone network to the IP network.
A routing method in which the subscriber telephone network according to claim 5 and the IP network are integrated. 7. An exchange for a subscriber telephone network using common line signaling, wherein the exchange is connected to an IP network via a connection point, and the originating exchange performs communication from the originating terminal to the terminating terminal. At this time, the address signal, which is one of the control signals used for the routing of the subscriber telephone network by the common line signaling system, includes the connection-related parameter which is a criterion for the routing from the subscriber telephone network to the IP network. The originating exchange or the repeater exchange routes the subscriber telephone network to the IP network on the basis of the connection-related parameter.