JPH11195468A - Straight/cross changeover jack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a straight/cross changeover jack capable of easily changing over the connection characteristic of straight or cross of a connection cable without conducting the connection changing work of a connection plug. SOLUTION: This changeover jack 21 is equipped with first and second connection port portions 23, 25 into which a predetermined connection plug having the end portion of a connection cable of a straight or cross connection characteristics is inserted and connected for cross connecting and straight connecting, and a connection plug portion 27 having the same constitution as the connection plug. The terminal portion of the first connection port 23 and the terminal portion of the connection plug 27 are wiring connected so as to changeover the transmitting pair and receiving pair of the connection cable connected to the first connection port portion 23, and the terminal portion of the second connection port 25 and the terminal portion of the connection plug portion 27 are wiring connected so as not to change over the transmitting pair and receiving pair of the connection cable connected to the second connection port portion 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a straight / cross switching jack inserted in a communication path of a predetermined communication network such as a LAN (local area network).

[0002]

2. Description of the Related Art In recent years, with the development of communication technologies in computer networks and the like, so-called LANs for connecting terminals such as computers and peripheral devices have been actively developed in one room or building. This LAN includes a peer-to-peer system in which each terminal 1 exchanges data in an equal relationship as shown in FIG. 4 or a LAN as shown in FIG.
A client / server to which a plurality of terminals (client devices) 1 are connected centering on a server (terminal) 3 which manages a management function
There is a server type.

As shown in FIG. 6, a connecting cable 5 used for constructing the LAN includes a straight cable 5a for connecting without replacing a transmitting pair and a receiving pair, and a connecting cable 5 as shown in FIG.
There is a cross cable 5b that connects the transmission pair and the reception pair by switching them, and these two types of connection cables 5 can be used properly according to the situation. 6 and 7, reference numeral 6 denotes a connection plug (RJ45 plug) connected to the end of each connection cable 5, and 1 to 8 denote terminal installation portions provided on the connection plug 6. Is the identification number assigned to the.

In the connection plug 6 of the connection cable 5, the first and second terminal portions 6a and the third and sixth terminal portions 6a form plus and minus pairs to form a transmission pair or a reception pair. In the straight cable 5a in FIG. 6, the connection plugs 6 at both ends are connected without exchanging the transmission pair and the reception pair, but the cross cable 5b in FIG.
In FIG. 7, the transmission pair and the reception pair are exchanged, and the connection plugs 6 on both sides are connected.

[0005] In addition, as shown in FIG. 8, a hub (HUB: concentrator) for connecting the plurality of connection cables 5 to each other is provided in the branch integration section 7 where the plurality of connection cables 5 are branched and integrated.
9 is used. The hub 9 is provided with a plurality of, here eight, connection ports 11.
1, a connection plug 6 provided at the end of the connection cable 5 is inserted for connection.

[0006] n connection ports 11 provided in the hub 9
Among them, the connection cable 5A on the trunk line side (upstream in the branching direction) is connected to the nth connection port 11a, and the branch line side (branch) is connected to the first to (n-1) th connection ports 11b. (The downstream side in the direction), and the connection cables 5B are sequentially connected via the hub 9 in this manner, whereby the communication path is branched into a star shape or, if necessary, the communication path is changed. It can be extended sequentially.

In such a hub 9, the nth connection port 11a of the n connection ports 11 of the hub 9 is connected to the hub 9 having a cascade port.
And a hub 9 that is not a cascade port.

Here, the cascade port is the n-th port.
Connection cable 5A connected to the connection port 11a
From the first to (n-1) th connection port 11b
The connection port 11 is configured such that the connection characteristic of a straight or cross when connecting to the connection cable 5B connected to the hub 9 is switched by switching a changeover switch (not shown) provided on the hub 9. In the hub 9 not having such a cascade port, the n-th connection port 11a and the first to (n-1) -th connection ports 11b are always connected straight. .

By the way, in performing communication between the terminals 1 and 3 in order to perform bidirectional transmission and reception of communication data, it is necessary to add plus or minus at a connection port (not shown) of the connection cable 5 provided on one of the terminals 1 and 3. The output signal from the transmitting terminal paired with the other terminal 1, 3 is input to the receiving terminal paired with the same positive and negative terminals at the connection ports of the other terminals 1 and 3, and conversely, the other terminal 1, 3 The output signal from the transmission terminal paired with the connection port must be input to the reception terminal paired with the connection port of one of the terminals 1 and 3, and any one of the communication paths In this point, it is necessary to connect the transmission pair and the reception pair in the communication path by exchanging them.

In general, the exchange between the transmission pair and the reception pair is performed by using a hub having a cascade port in the hub 9 and switching a changeover switch for switching the connection characteristic (in this case, A straight cable 5a is basically used as the connection cable 5), and a cross cable may be inserted into the communication path.

When the terminals 1 and 3 are connected to each other in this manner, in a conventional connection method, when a LAN is constructed, a straight cable and a sufficient number of hubs 9 having cascade ports are provided. No problem, but lack of hub 9 with cascade port,
Only a hub 9 without a cascade port is made easier,
Moreover, when only a straight cable is prepared when a cross cable is to be used, or when only a cross cable is prepared when a straight cable is to be used, the prepared straight or cross connection cable 5 is used. The connection plug 6 which has been already connected is cut off by cutting off the end portion, the transmission pair and the reception pair of the signal line in the cable 5 are exchanged and connected to a new connection plug 6 so that the connection cable 5 is connected. The connection characteristics of the straight or cross are changed.

[0012]

However, the work of changing the connection characteristics of the connection cable 5 by replacing the connection plug 6 as described above is a very laborious and complicated work, and also requires little work experience. When the user replaces the connection plugs 6, a connection error or a contact failure occurs, or when the connection plugs 6 are replaced many times due to a work error or the like, a large number of connection plugs 6 are wastefully consumed. There is a problem that the cost increases.

Accordingly, the present invention has been made in view of the above problems, and provides a straight / cross switch jack which can easily switch the connection characteristics of a straight or cross connection cable without replacing the connection plug. With the goal.

[0014]

A technical means for achieving the above object is used for a communication path of a predetermined communication network, and is a straight line connecting a transmission pair and a reception pair without exchanging them, or the transmission pair. First and second connection port portions to which predetermined connection plugs provided at the end portions of connection cables having cross connection characteristics for connecting and exchanging the reception pair with each other are inserted and connected; A connection plug provided on the opposite side of the second connection port and having a configuration similar to that of the connection plug; and a terminal provided on the first connection port; and a terminal provided on the first connection port. A terminal portion provided is wired and connected so as to exchange a transmission pair and a reception pair of the connection cable connected to the first connection port portion, and the second connection port And the terminal portion provided on the connection plug portion are wired and connected such that the transmission pair and the reception pair of the connection cable connected to the second connection port portion are not interchanged. It is characterized by being.

[0015] Preferably, a predetermined identification indicating connection characteristics of each of the connection port portions is attached to any position of a peripheral portion of the first and second connection port portions in the straight / cross switching jack. It is good to be.

[0016]

FIG. 1 is a perspective view of a straight / cross switching jack according to an embodiment of the present invention. The switching jack 21 has a first connection port 23 for cross connection and a second connection port 25 for straight connection on one side, and a connection plug 27 on the other side. .

The connection port portions 23 and 25 and the connection plug portion 27 are connected to the connection port 11 provided at the connection portion between the hub 9 and the terminals 1 and 3 and the end portion of the connection cable 5 described above. It has the same configuration as the plug (RJ45 plug) 6.

A plurality of terminal portions 23a and 25a (see FIG. 3) respectively connected to the plurality of terminal portions 6a of the connection plug 6 of the connection cable 5 are provided in each of the connection port portions 23 and 25. By inserting the connection plug 6 into the connection port portions 23 and 25, the terminal portions 6a of the connection plug 6 and the terminal portions 23a and 2 in the connection port portions 23 and 25 are inserted.
5a is connected.

As shown in FIG. 2, the connection plug portion 27 has terminal portions 23a, 25a of the connection port portions 23, 25.
The same number of terminal portions 27a as those provided in the hub 9 and the like are provided.
1, each terminal 27 a of the connection plug 27 is connected to each terminal provided in the connection port 11.

In the outer peripheral portion of the switching jack 21, one end on which the first and second connection port portions 23 and 25 are provided is provided with a portion on the side where the first connection port portion 23 is provided; And a label 29 on which a "cross" or "straight" sign indicating the connection characteristics of the respective connection port portions 23 and 25 is written on a portion on the side where the second connection port portion 25 is provided, which is the opposite side portion. Is affixed. Here, the label 29 is attached.
“Cross” and “straight” may be engraved on the outer peripheral surface of the casing.

Each terminal portion 23a provided on the first connection port portion 23 and each terminal portion 27a provided on the connection plug portion 27 are connected to the transmission pair of the connection cable 5 connected to the first connection port portion 23. Each terminal 25a provided in the second connection port 25 and each terminal 27a provided in the connection plug 27 are connected to the second connection port by wiring. 25 are connected so that the transmission pair and the reception pair of the connection cable 5 connected to 25 are not interchanged.

FIG. 3 shows each terminal 23a, 25a in each connection port 23, 25 of the switching jack 21.
FIG. 4 is a circuit diagram showing a specific connection structure between the connection plug 27 and each terminal 27a.

In FIG. 3, reference numerals 1 to 8 denote each connection port unit 2.
These are identification numbers assigned to the terminal installation portions of the connection plug portions 3 and 25 and the connection plug portion 27. The identification numbers 1 to 8 correspond to the identification numbers 1 to 8 in FIGS. 6 and 7 described above, and each terminal 6a of the connection plug 6 and each connection port 2
The terminals 3a and 25a having the same identification number are connected to each other.

In the configuration shown in FIG. 3, the first and second terminal portions 23a, 25a, 27a and the third and sixth terminal portions 23a,
25a and 27a form a transmission pair or a reception pair, respectively. Each terminal 23a of the first connection port 23 for cross-connection and each terminal 27a of the connection plug 27 are a transmission pair and a reception pair. While the wires are connected so that the pairs are exchanged, each terminal 25a of the second connection port 25 for straight connection and each terminal 27a of the connection plug 27 are connected to a transmission pair and a reception pair. The wires are connected so that the pairs are not interchanged.

As a result, even if the connection cable 5 is connected to the second connection port 25, the connection characteristics of the connection cable 5 in the straight or cross state cannot be switched, but the connection cable 5 is connected to the first connection port 23. When connected to
The connection characteristics of the connection cable 5 can be switched by the switching jack 21.

The connection plug portion 27 of the switching jack 21 has the same configuration as a normal RJ45 plug. 11 can be connected.

As described above, according to this embodiment, the connection plug 6 at the end of the connection cable 5 is simply inserted into the first connection port 23 for cross connection and connected, as in the prior art. The straight or cross connection characteristics of the connection cable 5 can be easily switched without performing complicated replacement work of the connection plug 6.

By switching the connection characteristics of the connection cable 5 in this manner, it is possible to easily cope with a shortage of the straight or cross connection cable 5 when connecting the terminals 1 and 3. . In addition, normally, only the straight cable 5a is connected to a cable tester for testing whether or not the connection cable 5 used for the communication path satisfies the category 5 cable standard. However, by connecting the switching jack 21 to the connection port of the connection portion of the cable tester, the cross test cable 5b is connected by the cable tester.
Can also be tested.

The switching jack 21 is provided with first and second two connection port portions 23 and 25 having straight or cross connection characteristics.
When the switching jack 21 is kept connected to a predetermined connection port 11 provided at a predetermined connection portion in the communication path, and the connection characteristics of the connection cable 5 need to be switched, the connection cable 5 is disconnected. First connection port 2
3, when there is no need to switch the connection characteristics of the connection cable 5, it is possible to flexibly respond to the situation, such as connecting the connection cable 5 to the second connection port unit 25. .

Further, at one end of the outer peripheral portion of the switching jack 21, a portion provided with the first connection port portion 23 and a portion provided with the second connection port portion 25 are provided. Since the label 29 in which "Cross" and "Straight" indicating the connection characteristics of the connection port sections 23 and 25 are entered is attached, the connection cable 5 is connected to any of the connection port sections 23 and 25. You can easily and quickly identify what to do.

In this embodiment, a "cross" is used to identify the first and second connection ports 23 and 25.
Although the display content of “straight” is attached to the switching jack 21, the present invention is not limited to this, and another identification such as a color display or a mark display indicating the connection characteristics of each of the connection ports 23 and 25 is attached to the switching jack 21 by labeling or the like. May be attached to a similar position.

[0032]

As described above, according to the first aspect of the present invention, simply connecting this straight / cross switching jack to the connection plug at the end of the connection cable allows a complicated connection plug as in the prior art. It is possible to easily switch the connection characteristics of a straight or cross connection cable without performing replacement work.

Further, since the straight / cross switching jack is provided with the first and second two connection port portions having straight or cross connection characteristics,
If the straight / cross switching jack is kept connected to a predetermined connection port provided at a predetermined connection portion in the communication path, and the connection characteristics of the connection cable need to be switched, the connection cable is switched to a second connection port. If it is not necessary to switch the connection characteristics of the connection cable by connecting to the first connection port, it is possible to flexibly respond to the situation, such as connecting the connection cable to the second connection port. it can.

According to the second aspect of the present invention, the predetermined identification indicating the connection characteristics of each connection port at any position around the first and second connection ports in the straight / cross switching jack. Since the display is attached, it is possible to easily and quickly identify to which connection port the connection cable should be connected.

[Brief description of the drawings]

FIG. 1 is a perspective view of a straight / cross switching jack according to an embodiment of the present invention.

FIG. 2 is a plan view of a connection plug portion of the switching jack of FIG. 1;

FIG. 3 is a circuit diagram showing a specific connection structure between each terminal in each connection port of the switching jack of FIG. 1 and each terminal of a connection plug;

FIG. 4 is a wiring diagram showing a general LAN.

FIG. 5 is a wiring diagram showing a general LAN.

FIG. 6 is a circuit diagram showing a connection structure of a straight cable.

FIG. 7 is a circuit diagram showing a connection structure of a cross cable.

FIG. 8 is a perspective view of a general hub.

[Explanation of symbols]

 5 Connection Cable 6 Connection Plug 9 Hub 11 Connection Port 21 Straight / Cross Switching Jack 23 First Connection Port 25 Second Connection Port 27 Connection Plug 23a, 25a, 27a Terminal

Claims (2)

[Claims] The present invention is used for a communication path of a predetermined communication network, and has a connection characteristic of a straight line for connecting without replacing a transmission pair and a reception pair, or a cross for connecting and connecting the transmission pair and the reception pair. First and second connection port portions to which predetermined connection plugs provided at the end of the connection cable are inserted and connected, and the connection plugs provided on opposite sides of the first and second connection port portions; And a terminal portion provided in the first connection port portion, and a terminal portion provided in the connection plug portion is connected to the first connection port portion. The connection cable is wired and connected so that the transmission pair and the reception pair of the connection cable are exchanged, and is provided at the terminal portion provided at the second connection port portion and at the connection plug portion. Serial and the terminal portion, the second straight / cross switching jacks, characterized in that it is hardwired so as not interchanging the receive pair and transmitting pairs of the connecting cable connected to the connection port. 2. A predetermined identification display indicating a connection characteristic of each connection port portion is attached to any position of a peripheral portion of the first and second connection port portions in the straight / cross switching jack. 2. The straight / cross switching jack according to claim 1, wherein: