JP2001077864A - Network system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a network system from being brought into an operation disabled state due to wrong plugging of a plug by a user. SOLUTION: A changeover processing section 12/22 discriminates whether an RJ modular plug plugged into a connector A11/B21 is pulled into an ISDN or plugged into an Ethernet. In the former case, the connector A11/B21 is connected to an ISDN processing section 13/23 and in the latter case, the connector A11/B21 is connected to an Ethernet processing section 14/24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network device which can be connected to a plurality of heterogeneous networks by using connectors of the same shape.

[0002]

2. Description of the Related Art 10BASE-T or 100BASES
Ethernet (IEEE802.3,
IEEE802.3u) and ISDN are both connectors for connecting network devices to a network as shown in FIG.
RJ45 specified by ISO8877 having the shape shown in
-Employs a jack for an 8-pin modular plug.
Network devices that can be connected to a plurality of heterogeneous networks using connectors of the same shape include such 10BASE-T or 100BASE-T and ISD
There is known a router that connects N and relays IP packets between both networks. In addition, such a router has a jack for an RJ45-8 pin modular plug that is compatible with 10BASE-T or 100BASE-T.
Each jack is provided corresponding to each of the N jacks, and each jack is connected to a processing unit inside a router that performs processing for a type of network corresponding to the jack.

[0003]

For example, the above-mentioned 1
In a network device such as a router connecting 0BASE-T or 100BASE-T and ISDN, which can be connected to a plurality of different networks using the same connector, the jacks provided for connecting to different types of networks are the same. Due to the shape, the user may mistakenly insert the plug.

For example, 10BASE-T or 10BASE-T
Do not insert the plug of the cable connected to ISDN into the jack for 0BASE-T connection,
Jack for 10BASE-T or 100BA
The plug of the cable connected to the SE-T may be inserted.

[0005] In such a case, of course, different types of networks are connected to the processing unit inside the router that performs processing for a certain type of network, so that the network device operates normally. Can not.

Accordingly, the present invention provides a network device which can be connected to a plurality of heterogeneous networks by using connectors of the same shape, by allowing each jack to be shared by a plurality of heterogeneous networks connected to the network device. It is an object of the present invention to prevent an inoperable state of a network device from being caused by an incorrect plug insertion.

[0007]

In order to achieve the above object,
The present invention provides, for example, a network device that uses a connector of the same shape for connection between a first type network and a second type of network, and includes a plurality of the same shape connectors and the first type network. A first type network processing circuit for controlling communication / transmission between the second type network processing circuit and a second type network processing circuit for controlling communication / transmission between the second type network; A determination unit for determining whether the mobile terminal is connected to the first type network or a second type network; and the determination unit determines that the mobile terminal is connected to the first type network. A connector having the same shape connected to the first type network processing circuit, and the connector having the same shape determined to be connected to the second type network; To provide a network apparatus characterized by having a connection switching means for connecting to said second type network processing circuit.

According to such a network device, in a network device connected to a heterogeneous network using connectors of the same shape, the type of network connected to each of the connectors of the same shape is determined, and each of the connectors of the same shape is determined. Is connected to the processing unit that processes communication / transmission of the determined type of network. Therefore, the connectors having the same shape can be shared by different types of networks.
Therefore, a malfunction of the router does not occur due to a wrong plug insertion by the user.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the network device according to the present invention will be described with reference to 10BASE-T or 100BASE-T.
An example in which the present invention is applied to a router that connects BASE-T and ISDN and relays IP packets between the two networks will be described.

FIG. 1 shows a configuration of a router according to the present embodiment.

In the figure, 11 is a connector A, 21 is a connector B, 12 and 22 are switching processing units, 13 and 23 are ISDN processing units, 14 and 24 are Ethernet processing units, 30 is a routing processing unit, and 40 is a routing processing unit. 3 shows a control unit.

Here, connector A11 and connector B21
Are jacks for the aforementioned RJ45-8 pin modular plug. Further, the switching processing unit 12 selectively connects the connector A11 to one of the ISDN processing unit 13 and the Ethernet processing unit 14, and the switching processing unit 22
The connector B21 is selectively connected to one of the ISDN processing unit 23 and the Ethernet processing unit 24. Also, I
The SDN processing units 13 and 23 provide the routing processing unit 30 with a communication function using ISDN, and the Ethernet processing units 14 and 24 provide the routing processing unit 30 with a communication function using Ethernet. The routing processing unit 30 has a function of processing ARP 31, IP 32, and PPP 33 protocols.
3 and protocol processing between the Ethernet processing units 14 and 24, and routing of communication data according to the routing table 34. Then, the control unit 40 controls these units.

Next, FIG. 2 shows the internal configuration of the switching processing unit 12. Note that the switching processing unit 22 has the same configuration as the switching processing unit 12.

When the RJ45 modular plug inserted into the connector A11 is connected to ISDN under the control of the control unit 40, the switching processing unit 12 connects the connector A11 to the ISDN processing unit 13. On the other hand, the RJ45 modular plug inserted into the connector A11 is Ethernet (10BASE-T or 100BASE-T).
If it is connected to T), the connector A11 is connected to the Ethernet processing unit 14.

For this purpose, the switching processing unit 12
It is determined whether the RJ45 modular plug inserted into the connector A11 is connected to ISDN or to Ethernet. This determination is made using the difference in the use of the 8-pin RJ45 modular plug between ISDN and Ethernet.

FIG. 3 shows the R in ISDN and Ethernet.
Shows how to use the 8-pin J45 modular plug.

As shown in FIG.
Pins 3 and 6 of the modular plug are used for signal transmission (T), pins 4 and 5 are used for signal reception (R), and the remaining pins are not used. On the other hand, in Ethernet, pins 1 and 2 of the RJ45 modular plug are used for signal transmission (T),
Pins 3 and 6 are used for signal reception (R), and the remaining pins are not used.

Therefore, the switching processing unit 12 confirms that the RJ45 modular plug, which is used for signal reception by ISDN and is not used by Ethernet, is inserted into the connector A11 by conduction of pins 4 and 5 and is connected to ISDN. It detects that the RJ45 modular plug, which is used for signal transmission in Ethernet and is not used in ISDN, is inserted into the connector A11 by the conduction of pins 1 and 2 and is connected to Ethernet.

Returning to FIG. 2, reference numerals 121 and 122 denote protection circuits, reference numerals 123 and 124 denote pin use detection circuits, and reference numerals 125 and 1.
26 and 127 are changeover switches, 132 is an ISDN receiving transformer, 128 is an ISDN transmitting transformer, 129 is a feed detection circuit, 130 is an Ethernet receiving transformer, and 131 is an Ethernet transmitting transformer.

Now, in the initial state, the changeover switch 1
A protection circuit 121 connects pins 4 and 5 of the connector A11.
Is connected to the pin use detection circuit 123 via a switch, and the changeover switch 126 connects the pins 1 and 2 of the connector A11 to the protection circuit 1
22 is connected to a pin use detection circuit 124.

Hereinafter, the connection state of the changeover switches 125 and 126 will be referred to as an initial connection state.

The pin use detection circuit 123 has a power supply for applying a voltage between pins 4 and 5 in the initial connection state, and when a current flows between pins 4 and 5,
When the connection between the 4th and 5th pins is conducted, it is determined that the RJ45 modular plug inserted into the connector A11 is connected to the ISDN, and the control unit 40 is notified of the ISDN connection. When notified of the ISDN connection, the control unit 40 controls the changeover switch 125 to set the pins 4 and 5 to the ISD
At the same time as connecting to the N receiving transformer 132, the switch 127 is controlled to connect the pins 3 and 6 to the ISDN transmitting transformer 128.

It should be noted that the pin use detection circuit 123 uses an RJ45 modular plug inserted into the connector A11.
If it is determined that the connection is made to the DN, the control unit 120 directly controls the changeover switch 125 to connect the pins 4 and 5 to the ISDN reception transformer 132 and to change the changeover switch 12
7 and pins 3 and 6 to the ISDN transmit transformer 12
8 may be connected.

Thus, the ISDN of the connector A11
The pins used and therefore ISDN are
2 is connected to the ISDN processing unit 13 via the ISDN transmission transformer 128.

Hereinafter, the connection state of the changeover switches 125 and 127 will be referred to as an ISDN side connection state.

When the pins 4 and 5 are connected to the ISDN receiving transformer 132 via the changeover switch 125 and the pins 3 and 6 are connected to the ISDN transmission transformer 128 via the changeover switch 127 depending on the ISDN side connection state. ,
While the RJ45 modular plug connected to the ISDN is inserted into the connector A11, the power supply detection circuit
Detect power supply from SDN. Then, the power supply detection circuit 1
When the power supply cannot be detected, the power supply 29 notifies the control unit 40 of the power supply interruption. Control unit 4 notified of power cut-off
0 returns the changeover switch 125 to the initial state. That is, the pins 4 and 5 are connected to the pin detection circuit 123 via the protection circuit 121.

On the other hand, similarly, the pin use detection circuit 124
Is provided with a power supply for applying a voltage between pins 1 and 2 in an initial connection state, and when current flows between pins 1 and 2, that is, when pins 1 and 2 are conducting, connector A1
It is determined that the RJ45 modular plug inserted in 1 is connected to Ethernet, and the Ethernet connection is transmitted to the control unit 40. When notified of the Ethernet connection, the control unit 40 outputs
2 is connected to the Ethernet transmission transformer 131, and pins 3 and 6 are connected to the Ethernet reception transformer 130 via the changeover switch 127.

As a result, the Ethernet pin of the connector A11 and thus the Ethernet are connected to the Ethernet processing unit 14 via the Ethernet receiving transformer 130 and the Ethernet transmitting transformer 131.

Hereinafter, the connection state of the changeover switches 126 and 127 will be referred to as the Ethernet side connection state.

Now, when the Ethernet is connected to the Ethernet processing unit 14 depending on the connection state on the Ethernet side,
The Ethernet processing unit 14 monitors a LINK on the Ethernet. Then, when this is expired, a LINK disconnection is notified to the control unit 40. Then, the control unit 40 notified of the LINK disconnection returns the changeover switch 126 to the initial state. That is, pins 1 and 2 are connected to pin detection circuit 124 via protection circuit 122.

The protection circuits 121 and 122 are configured to detect an abnormal signal such as a surge generated on a pin of the connector A11.
It is provided to protect the pin use detection circuits 123 and 124.

The operation of the control unit 40 including the control of the changeover switch will be described below.

As shown in FIG. 4, the control unit 40 manages four states and performs processing according to each state.

The initial state is state 1. In this state 1, as shown in FIG.
Notification of SDN connection or Ethernet connection (Connector A
Side connection notification) (step 51) or
It waits for a notification of the ISDN connection or the Ethernet connection (connector B side connection notification) from the switching processing unit 22 (step 55).

Then, if there is a notice, the connection of the changeover switch of the changeover processing unit 12/22 which has made the notice is made.
If the notification is an ISDN connection (step 5
2, 56), and control to the ISDN side connection state (step 5)
(3, 57), if the notification is an Ethernet connection (steps 52, 56), control is performed to connect to the Ethernet side (steps 54, 58). If the notification is performed by the switching processing unit 12, the state transitions to state 2, and if the notification is the switching processing unit 22, the state transitions to state 3.

In state 2, as shown in FIG. 6, whether or not a notification of ISDN connection or Ethernet connection (connector B side connection notification) is received from the switching processing unit 22 (step 6).
1) Alternatively, the process waits for a notification of disconnection of power supply from the switching processing unit 12 or a notification of disconnection of LINK from the Ethernet processing unit 14 (notification of disconnection of the connector A) (step 65).

When the notification of the ISDN connection or the Ethernet connection is received from the switching processing unit 22, the connection of the changeover switch of the switching processing unit 22 is changed to the ISDN connection.
If it is a connection (step 62), it is controlled to the ISDN side connection state (step 63), and if it is an Ethernet connection (step 62), it is controlled to the Ethernet side connection state (step 64). Then, the state transits to the state 4.

On the other hand, when the power supply is cut off from the switching processing unit 12 or the LINKK is cut off from the Ethernet processing unit 14, the connection of the changeover switch of the switching processing unit 12 is controlled to the initial connection state (step 66). Transitions to.

In state 3, as shown in FIG. 7, whether or not a notification of ISDN connection or Ethernet connection (connector A side connection notification) is received from the switching processing unit 12 (step 7).
1) Or, wait for receiving a notification of disconnection of power supply from the switching processing unit 22 or a notification of disconnection of LINK from the Ethernet processing unit 24 (notification of disconnection of the connector B) (step 75).

When the notification of the ISDN connection or the Ethernet connection is received from the switching processing unit 12, the connection of the changeover switch of the switching processing unit 12 is changed. When the notification is the ISDN connection (step 72), the connection state of the ISDN side is set. (Step 73), and when the connection is Ethernet connection (step 72), the connection state is controlled to the Ethernet side (step 74). Then, the state transits to the state 4.

On the other hand, when the power supply is cut off from the switching processing unit 22 or the LINK disconnection notification is received from the Ethernet processing unit 24, the connection of the changeover switch of the switching processing unit 22 is controlled to the initial connection state (step 76). Transitions to.

In state 4, as shown in FIG. 8, first, by this point, the switching processing unit 12
The ISDN processing unit 13 or the Ethernet processing unit 14 connected to the
Activate the ISDN processing unit 23 or the Ethernet processing unit 24 and the routing processing unit 30 connected to the network (step 80).

Then, a notification of the power supply interruption from the switching processing unit 12 or the LINK disconnection from the Ethernet processing unit 14 is received (step 81), or the power supply interruption from the switching processing unit 22 or the LIN from the Ethernet processing unit 24 is received.
It waits for a notice of K disconnection (step 84).

When the power supply is disconnected from the switching processing unit 12 or the LINK disconnection is notified from the Ethernet processing unit 14, the connection of the switching switch of the switching processing unit 12 is controlled to the initial connection state (step 82), and the activation is performed. Was, IS
The DN processing unit 13 or the Ethernet processing unit 14 and the IS
Deactivate the DN processing unit 23 or the Ethernet processing unit 24 and the routing processing unit 30 (Step 83),
Transit to state 3.

On the other hand, when the power supply is cut off from the switching processing unit 22 or the LINK disconnection is notified from the Ethernet processing unit 24, the connection of the changeover switch of the switching processing unit 22 is controlled to the initial connection state (step 85), and the switch is activated. ISD
N processing unit 13 or Ethernet processing unit 14 and ISD
The N processing unit 23 or the Ethernet processing unit 24 and the routing processing unit 30 are deactivated (step 86), and the state transits to the state 2.

Now, in the state 4, the IS that is activated and is connected to the connector A11 by the switching processing unit 12 is activated.
The ISD connected to the connector B21 by the DN processing unit 13 or the Ethernet processing unit 14 and the switching processing unit 22
The N processing unit 23 or the Ethernet processing unit 24 and the routing processing unit 30 perform the following routing processing in cooperation with each other until they are deactivated.

First, as shown in FIG. 9A, the RJ4 connected to the Ethernet is connected to the connector A11.
A description will be given of a case where the connector B21 is an RJ45 modular plug connected to ISDN.

In this case, the above processing activates the Ethernet processing unit 14, the ISDN processing unit 23, and the routing processing unit 30.

The IP datagram on the Ethernet frame received by the Ethernet processing unit 14 is sent to the routing processing unit 30. The IP 32 of the routing processor 30 refers to the routing table 34 and determines a routing destination corresponding to the destination IP address and an interface used for transmission.

The data received by the ISDN processing unit 23 on the B channel of the ISDN line already established by the incoming call from the other party or the control of the PPP 33 described later is sent to the routing processing unit 30. A PPP connection request from a partner on the B channel or a PP described later
A PP that has already established a PPP connection under the control of P33
By the process of P33, the PPP frame is restored, and an IP datagram is extracted therefrom and passed to IP32. Then, the IP 32 refers to the routing table 34 and determines a routing destination corresponding to the destination IP address and an interface used for transmission.

Here, the routing table is shown in FIG.
As shown in (1), an IP address, a netmask indicating a network address portion of the IP address, a gateway serving as a routing destination when routing an IP datagram having the IP address as a destination to another gateway, and transmission are used. It is a table in which the correspondence of the interface is described. If the IP datagram is not routed to another gateway, the destination IP address is the routing destination.

As interfaces, the Ethernet processing unit 14, the Ethernet processing unit 24, the ISDN processing unit 1
3PPn (n = 1,2,3 ,,, 10), ISDN processing unit 23PP
Pn can be described.

In the case of FIG. 9A, as an interface, the ISDN processing unit 2 corresponds to the destination IP address of the IP datagram to be routed on the Ethernet frame received by the Ethernet processing unit 14.
3PPPn will be described. Further, the Ethernet processing unit 14 is described corresponding to the destination IP address of the IP datagram in the PPP frame on the B channel received by the ISDN processing unit 23.

Now, the IP 32 of the routing processing unit 30
When the ISDN processing unit 23PPPn is determined as the transmission interface, the IP datagram to be routed to the PPP 33 is transferred as the ISDN processing unit 23PPPn data. PPP33 is an ISDN processing unit 23P
If the PPn data is received, the ISDN processing unit 23
If the PPP connection has not been established, the control unit controls the ISDN processing unit 23 to establish an ISDN line, and establishes a PPP connection with the other party on the B channel of the established ISDN line. Also, the ISDN processing unit 23 received from the IP 32
The PPPn data is stored in the PPP frame, and is stored in the ISDN processing unit 23 as the data of the B channel in which the PPP connection with the partner of the PPPn is established.
Transfer to The ISDN processing unit 23 transmits this to the ISDN.

The IP 32 of the routing processing unit 30
If the Ethernet processing unit 14 is determined as the transmission interface, the IP datagram to be routed is transferred to the Ethernet processing unit 14 with the MAC address determined by the ARP 31 corresponding to the routing destination of the IP datagram. . Ethernet processing unit 14
Stores the transferred IP datagram in an Ethernet frame, and transmits the IP datagram to the Ethernet using the added MAC address.

It is to be noted that, contrary to the case of FIG. 9A, what is connected to the connector B21 is the RJ connected to the Ethernet.
If the connector A11 is an RJ45 modular plug connected to ISDN, the ISDN processing unit 23 in the above description
In the SDN processing unit 13, the operation is such that the Ethernet processing unit 14 is replaced by the Ethernet processing unit 24.

Next, as shown in FIG. 9 (b), a case will be described in which the connector A11 and the connector B21 are both RJ45 modular plugs connected to Ethernet.

In this case, the Ethernet processing unit 14, the Ethernet processing unit 24, and the routing processing unit 30 are activated by the above-described processing.

The IP datagram on the Ethernet frame received by the Ethernet processing unit 14 is sent to the routing processing unit 30. The IP 32 of the routing processing unit 30 refers to the routing table 34 and determines the routing destination corresponding to the destination IP address and the interface used for transmission.

Similarly, the IP datagram on the Ethernet frame received by the Ethernet processing unit 24 is
It is sent to the routing processing unit 30. The IP 32 of the routing processing unit 30 refers to the routing table 34 and determines a routing destination corresponding to the destination IP address,
Determine the interface to use for transmission.

In the case of FIG. 9B, as an interface of the routing table of FIG. 10, corresponding to the destination IP address of the IP datagram to be routed on the Ethernet frame received by the Ethernet processing unit 14, The Ethernet processing unit 24 will be described. Also, the I that is the target of routing on the Ethernet frame received by the Ethernet processing unit 24 is
The Ethernet processing unit 24 is described corresponding to the destination IP address of the P datagram.

The IP 32 of the routing processing unit 30
If the Ethernet processing unit 14 is determined as the transmission interface, the IP datagram to be routed is transferred to the Ethernet processing unit 14 with the MAC address determined by the ARP 31 corresponding to the routing destination of the IP datagram. . Ethernet processing unit 14
Transmits the transferred IP datagram to the Ethernet using the MAC address added by being stored in the Ethernet frame.

The IP 32 of the routing processing unit 30
When the Ethernet processing unit 24 is determined as the transmission interface, the ARP 31 transfers the IP datagram to be routed to the Ethernet processing unit 24 with the MAC address determined by the ARP 31 corresponding to the routing destination. The Ethernet processing unit 24 transmits the transferred IP datagram to the Ethernet using the MAC address added and stored in the Ethernet frame.

Next, as shown in FIG. 9C, what is connected to the connector A11 and the connector B21 is the ISD
The case of an RJ45 modular plug connected to N will be described.

In this case, the ISDN
The processing unit 13, the ISDN processing unit 23, and the routing processing unit 30 are activated.

The ISDN processing unit 13 determines that the already established I
The data received on the B channel of the SDN line is sent to the routing processing unit 30. Then, the PPP frame that has already established the PPP connection on the B channel restores the PPP frame, extracts the IP datagram therefrom, and passes it to the IP32. IP32
Refers to the routing table 34 and determines the routing destination corresponding to the destination IP address and the interface used for transmission.

Similarly, the data received by the ISDN processing unit 23 on the B channel of the already established ISDN line is sent to the routing processing unit 30. And PPP3 that has already established a PPP connection on this B channel
By the process of 3, the PPP frame is restored, and the IP datagram is extracted therefrom and passed to the IP32. I
The P32 refers to the routing table 34 and determines a routing destination corresponding to the destination IP address and an interface used for transmission.

In the case of FIG. 9C, the ISDN processing unit 1 is used as an interface of the routing table of FIG.
The ISDN processing unit 23 PPPn is described in correspondence with the destination IP address of the IP datagram in the PPP frame on the B channel received by the ISDN3, and the IP datagram in the PPP frame on the B channel received by the ISDN processing unit 23 Processing unit 13 corresponding to the destination IP address of
PPPn will be described.

Now, the IP 32 of the routing processing unit 30
When the ISDN processing unit 23PPPn is determined as the transmission interface, the IP datagram to be routed to the PPP 33 is transferred as the ISDN processing unit 23PPPn data. PPP33 is an ISDN processing unit 23P
If the PPn data is received, the ISDN processing unit 23
If the PPP connection has not been established, the control unit controls the ISDN processing unit 23 to establish an ISDN line, and establishes a PPP connection with the partner on the established B channel. In addition, IP32
The ISDN processing unit 23 PPPn data received from
The data is stored in the PP frame, and is transferred to the ISDN processing unit 23 as data of the B channel in which the PPP connection with the destination of the PPP is established. ISD
The N processing unit 23 transmits this to the ISDN.

The IP 32 of the routing processing unit 30
When the ISDN processing unit 23PPPn is determined as the transmission interface, the IP datagram to be routed to the PPP 33 is transferred as the ISDN processing unit 23PPPn data. PPP33 is an ISDN processing unit 23P
If the PPn data is received, the ISDN processing unit 13
If the PPP connection has not been established, the control unit 13 controls the ISDN processing unit 13 to establish an ISDN line, and establishes a PPP connection with the partner on the established B channel. In addition, IP32
The ISDN processing unit 13 PPPn data received from the
The data is stored in a PP frame, and is transferred to the ISDN processing unit 13 as data of the B channel in which the PPP connection with the destination of the PPP is established. ISD
The N processing unit 13 transmits this to the ISDN.

During the above operation, IP32
Performs IP address conversion as necessary.

The embodiment of the present invention has been described above.

As described above, according to the present embodiment, in a router connecting to an ISDN and an Ethernet that both use an RJ45 modular connector, is the plug connected to the jack for the RJ45 modular plug connected to the ISDN? Or Ethernet connection. And if ISDN, then ISD
A jack for an RJ45 modular plug is connected to the N processing unit. In the case of Ethernet, a jack for an RJ45 modular plug is connected to the Ethernet processing unit. For this reason, the jack for the RJ45 modular plug is
And can be shared by Ethernet. Therefore,
The malfunction of the router does not occur due to the user's incorrect plug insertion.

In the above embodiment, the connection between the RJ45 modular plug jacks 4 and 5 is detected to detect that the inserted RJ45 modular plug is connected to ISDN, and the jack for the RJ45 modular plug is detected. Of the inserted R
Detects that the J45 modular plug is connected to the Ethernet, but that the inserted RJ45 modular plug connects by another method, or a combination of these methods. You may make it determine whether a network is ISDN or Ethernet.

For example, when a signal (such as a frame clock transmitted by ISDN) is received from pins 4 and 5 of the RJ45 modular plug jack, the RJ45 modular plug inserted into the RJ45 modular plug jack is connected to ISDN. May be determined. Further, a detection unit for detecting that the RJ45 modular plug has been inserted is provided. If a signal is not received from pins 4 and 5 of the RJ45 modular plug jack even though the RJ45 modular plug is inserted, the detection unit is inserted. The RJ45 modular plug may be determined to be connected to Ethernet. Also, simply
If no signal is received from pins 4 and 5 of the RJ45 modular plug jack, it may be determined that the inserted RJ45 modular plug is connected to Ethernet.

That is, when the RJ45 modular plug connected to the ISDN is inserted and when the RJ45 modular plug connected to the Ethernet is inserted, the difference between the signal interfaces of the two networks causes the pin of the RJ45 modular plug jack to be inserted. Any method may be used as long as the network inserted into the RJ45 modular plug jack is determined based on the difference in the electrical state that appears.

Alternatively, a higher-level determination, for example, whether a LINK of Ethernet has been established,
According to the determination of whether the frame synchronization of N has been established,
Modifications may be made to determine the network plugged into the RJ45 modular plug jack.

Note that the R of the router in the above embodiment is
A configuration in which the connection network of the J45 modular plug jack is determined and the internal connection destination is switched to a processing unit suitable for the determined network is, for example, only a single ISDN processing unit and an Ethernet processing unit as shown in FIG. And can be applied to a router that performs routing between ISDN and Ethernet. Also, 3 or more n RJ45 modular plug jacks that can be shared
The present invention can be similarly applied to a router having R, of which m are used for ISDN, and nm are used for Ethernet, for example, a router having a function as a hub.

The present invention can be applied not only to routers but also to general network devices that are connected to ISDN and Ethernet and perform processing for each. In addition, the network device does not have to perform the process related to the ISDN and the Ethernet such as the relay in cooperation.

The present invention is not limited to the jack for the RJ45 modular plug, and therefore is not limited to the ISDN and the Ethernet, and can be similarly applied to a network device which can be connected to a plurality of different networks by using a connector of the same shape.

[0081]

As described above, according to the present invention, in a network device connectable to a plurality of heterogeneous networks using the same shape connector, each of the same shape connectors is connected to a plurality of different type By making the network device sharable, it is possible to prevent an inoperable state of the network device from being caused by a user's incorrect plug insertion.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a router according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a switching processing unit according to the embodiment of the present invention.

FIG. 3 is a diagram showing how to use an RJ45 modular plug jack (8-pin connector) in ISDN and Ethernet.

FIG. 4 is a diagram illustrating a state managed by a control unit according to the embodiment of the present invention.

FIG. 5 is a flowchart illustrating a process performed in a state 1 by a control unit according to the embodiment of the present invention.

FIG. 6 is a flowchart showing a process performed by the control unit according to the embodiment of the present invention in state 2;

FIG. 7 is a flowchart showing a process performed by the control unit according to the embodiment of the present invention in state 3.

FIG. 8 is a flowchart showing a process performed by the control unit according to the embodiment of the present invention in state 4.

FIG. 9 is a diagram showing a connection between a router and a network according to the embodiment of the present invention.

FIG. 10 is a diagram showing a routing table according to the embodiment of the present invention.

FIG. 11 is a block diagram showing a configuration of another router according to the embodiment of the present invention.

FIG. 12 is a view showing the shape of an RJ45 plug.

[Explanation of symbols]

 11 ... Connector A 21 ... Connector B 12,22 ... Switching processing unit 13,23 ... ISDN processing unit 14,24 ... Ethernet processing unit 30 ... Routing processing unit 40 ... Control units 121, 122: Protection circuits 123, 124: Pin use detection circuits 125, 126, 127: Changeover switches 128: ISDN transmission transformers 129: Power supply detection circuits 130: Ethernet reception Transformer 131: Ethernet transmission transformer 132: ISDN reception transformer

Claims (4)

[Claims] 1. A network device using a same-shaped connector for connecting a first-type network and a second-type network, wherein the plurality of the same-shaped connectors are connected to the first-type network. A first type network processing circuit for controlling communication / transmission between the first type network processing circuit, and a second type network processing circuit for controlling communication / transmission between the second type network; Determining means for determining whether the mobile phone is connected to the first type network or connecting to the second type network; and determining that the mobile phone is connected to the first type network by the determining means. The same-shaped connector is connected to the first type network processing circuit, and the same-shaped connector determined to be connected to the second type network is connected. Network apparatus characterized by having a connection switching means for connecting the Kuta to said second type network processing circuit. 2. The network device according to claim 1, wherein each of the plurality of connectors having the same shape is an RJ45-8 pin modular jack, wherein the first type of network is ISDN. Network is 10BASE-T (IEEE802.3 /
Ethernet) or 100BASE-T (IEEE802.3u / Ethe
rnet), and based on the difference in the signal arrangement on the eight pins of the RJ45-8 pin modular jack, the determination means determines whether the jack is in accordance with an event that uniquely appears for ISDN and 10BASE-T or 100BASE-T, respectively. IS
Connected to DN or 10BASE-T
Alternatively, a network device that determines whether the device is connected to 100BASE-T. 3. The network device according to claim 2, wherein said judging means conducts between the fourth and fifth pins of said RJ45-8 pin modular jack and establishes a connection between the first and second pins. The continuity is checked. If there is continuity between the fourth and fifth pins, it is determined that the jack is connected to ISDN. If there is continuity between the first and second pins, the jack is connected. A network device, which determines that it is connected to 10BASE-T or 100BASE-T. 4. The network device according to claim 2, wherein the network device includes ISDN and 10BASE-T.
Alternatively, the network device is a router that relays communication with 100BASE-T.