JPH0549052A - In-premise communication system and repeater used for the system - Google Patents

Abstract

PURPOSE:To connect a primary cable provided with plural conductors to secondary side electronic devices of different kinds selectively by preparing plural repeaters that kinds of number of secondary connection sections differ. CONSTITUTION:A connector member 10B connecting to a host computer and a telephone exchange or the like via a primary cable is removably connected to a primary connection section 7 of a repeater 6. A data terminal equipment, a telephone terminal equipment and a facsimile terminal equipment or the like are connected to a secondary connection section 8 of the repeater 6. Then two data terminal equipments 3A are connected by selecting the data terminal use repeater 6 as the repeater. Furthermore, two telephone terminal equipments 3B and one data terminal equipment 3A are connected by selecting a common use repeater 6. Thus, the primary cable provided with plural conductors is selectively connected to secondary electronic devices of different kinds.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applicable to communication terminals such as host computers and telephone exchanges, and data terminals (personal computers, etc.).
A local communication system in which terminals such as a telephone, a telephone terminal, and a FAX terminal are connected through an exchange, and more specifically, a communication-use primary side cable having a plurality of conductors is connected to the exchange and connected to the terminal. A secondary side cable is connected to the primary side cable via a repeater and a repeater used therefor, specifically, each of a plurality of conductors of a communication primary side cable connected to an exchange. And a secondary side connection section for connecting to a secondary side cable for communication connected to a terminal.

[0002]

2. Description of the Related Art As a local communication system, one in which one secondary side cable is connected to one primary side cable is known. More specifically, at present, a cable having four pairs of conductors is provided as a primary side cable, and a data terminal, a telephone terminal or the like is connected to the exchange. As a repeater, one in which one secondary side cable is connected to one primary side cable is known. And, according to the conventional technique, the number of conductors required for the data terminal to communicate is four.
The number of conductors required for communication by the telephone terminal is two, whereas the number of conductors of the primary side cable is eight, so there is only one type of primary side cable It can be used both for connecting a data terminal to an exchange and for connecting a telephone terminal to an exchange, while having excellent installation workability. In other words, when changing the terminal connected to the exchange from the data terminal to the telephone terminal, or conversely from the telephone terminal to the data terminal, without changing the primary side cable or newly installing the repeater, It is only necessary to replace the secondary side cable connected to the data terminal with the one connected to the data terminal to the one connected to the telephone terminal, or vice versa.

[0003]

However, according to the above-mentioned conventional technique, it is necessary to connect one terminal to the exchange.
Since one primary side cable is required, that is, as many primary side cables as the number of terminals to be connected to the exchange, as described above, there is one type of primary side cable Although it is possible to improve workability, there is room for improvement in terms of installation work and cost, since it takes time to install. It is an object of the present invention to provide a local communication system and a repeater that can improve the installation workability and reduce the cost while advantageously exchanging terminals.

[0004]

The feature of the local communication system according to the present invention is that the sum of the numbers of conductors required by each of the terminals for communication is not more than the number of conductors of the primary cable. In connecting a plurality of terminals to the exchange, each of the secondary side cables connected to the plurality of terminals is connected to different conductors of one primary side cable. A feature of the repeater according to the present invention is that a plurality of the secondary side connecting portions 8 are provided, and each of the plurality of secondary side connecting portions is connected to a different one of the connecting ends of the primary side connecting portions. In addition, it is preferable that each of the primary side connecting portion and the plurality of secondary side connecting portions is formed of a connector.

[0005]

There are various types of terminals having different numbers of conductors required for communication, such as four conductors required for communication in a data terminal and two conductors in a telephone terminal. As mentioned above, since various terminals can be selectively connected to the primary side cable, it is necessary for communication such as connecting a data terminal or telephone terminal to the eight primary side cables with conductors. In many cases, terminals are connected that have a smaller number of conductors than the number of conductors of the primary cable. In such a case, among the conductors of the primary side cable, only the number of conductors necessary for communication of the terminal connected to the primary side cable is used for communication, and the remaining conductors are unused and are left over. For example, when the data terminal is connected to the primary side cable having eight conductors, four of the conductors of the primary side cable are used for communication, the remaining four are left, and the telephone terminal is connected. In some cases, two are used and the remaining six are left over. The present invention has been made in view of the above points, and according to the local area communication system of the present invention, a plurality of terminals whose number of conductors required for communication is less than the number of conductors of the primary side cable are used as the exchanges. When connecting, a plurality of terminals are connected to different conductors of one primary side cable to connect the plurality of terminals to the exchange with one primary side cable. It is possible to reduce the number of installed primary side cables than the number of Moreover, for example, when the number of conductors of the primary side cable is eight and the terminals to be connected are the data terminal and the telephone terminal, a state in which two data terminals can be connected to one primary side cable and one data terminal Telephone terminal 2
Since it is possible to change the terminal connected to one primary side cable such that the state in which can be connected to and the state in which four telephone terminals can be connected can be revealed, when changing the terminal connected to the exchange. There is no need to replace the primary cable or install a new one, only the connection of the terminal to the primary cable needs to be changed. Further, in the case of the repeater of the present invention, for example, when the number of conductors of the primary side cable is 8 and the terminals to be connected are the data terminal and the telephone terminal, the secondary side connecting portion is 2 for the data terminal. One with two specifications, one with two data terminals and two telephone terminals as secondary side connections, and one with four telephone terminals as secondary side connections For example, by providing repeaters of various specifications with different types and numbers of secondary side connecting parts, and selecting and using the repeaters based on the number and types of terminals to be connected. You can connect multiple terminals to the primary cable without any fuss. In particular, when the primary side connecting portion and the secondary side connecting portion are composed of connectors, the connecting work can be performed easily, quickly and accurately.

[0006]

Therefore, according to the present invention, the terminal connected to the exchange can be changed by changing the terminal connected to the primary cable without replacing or newly installing the primary cable. , It has become possible to provide a local communication system which can reduce installation costs and cost by reducing the number of cables on the primary side, and a repeater useful for constructing the same. In particular, according to claim 3, workability can be further improved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a local communication system has a primary side 2A of an exchange 2 connected to a communication base unit 1 such as a host computer 1A and a telephone exchange (PBX) 1B, and a data terminal 3A and a telephone terminal 3B. , FAX terminals or the like are connected to the secondary side 2B of the exchange 2.
On the secondary side 2B of the exchange 2, a plurality of connecting portions 2a for connecting a primary side cable 4 described later are formed. The means for connecting the terminal 3 to the secondary side 2B of the exchange 2 is such that the communication primary side cable 4 is connected to the connecting portion 2a of the secondary side 2B and the communication secondary side cable 5 is connected to the terminal 3. Is connected to the primary side cable 4 via a repeater 6. The primary side cable 4 has 4 pairs, that is, 8
A book conductor 4a is provided. The repeater 6 has a connection end 7a for connecting to each conductor 4a of the primary side cable.
And a plurality of secondary side connecting portions 8 for connecting to the secondary side cable 5.
The secondary-side connection unit 8 is used to connect a terminal 3A having four conductors 4a required for communication (a data terminal is a representative of the terminals 4 and is hereinafter referred to as a data terminal) 3A. Data terminal 8A and conductor 4 required for communication
A terminal with two a (a telephone terminal is a representative of them,
Called a telephone terminal. ) 8B for telephone terminals for connecting 3B. The secondary side connecting portion 8A for the data terminal has four connecting ends 8a for connecting to the conductors of the secondary side cable 5 one-to-one with four of the connecting ends 7a of the primary side connecting portion 7. Are connected by the correspondence relationship of
The secondary-side connecting portion 8B for the telephone terminal has two connecting ends 8b for connecting with the conductor of the secondary-side cable 5 and one-to-one with two of the connecting ends 7a of the primary-side connecting portion 7. They are connected in correspondence. The repeater 6 has three specifications: a data terminal 6A, a mixed terminal 6B, and a telephone terminal 6C. The data terminal repeater 6A enables connection of two data terminals 3A to the exchange 2 via one primary side cable 4, as shown in FIG. A secondary-side connecting portion 8A is provided, and four connecting ends 8a of one secondary-side connecting portion 8A are connected to four of the connecting ends 7a of the primary-side connecting portion 7, and the primary-side connecting portion 7 remains. The four connecting ends 7a are respectively connected to the four connecting ends 8a of the other secondary side connecting portion 8A. As shown in FIG. 3, the mixed repeater 6B enables connection of one data terminal 3A and two telephone terminals 3B to the exchange 2 via one primary side cable 4, and A secondary side connecting portion 8A for one data terminal and a secondary side connecting portion 8B for two data terminals are provided, and the secondary side connecting portion 8 for the data terminal of the primary side connecting portion 7 is provided.
Each of the four connecting ends 8a of A is connected to the connecting end 7 of the primary side connecting portion 7.
The secondary side connecting portion 8 for one telephone terminal is connected to two of the remaining connecting ends 7a of the primary side connecting portion 7 and the secondary side connecting portion 8 for one telephone terminal.
The two connecting ends 8b of B are connected to each other, and the remaining two connecting ends 7a of the primary side connecting part 7 are connected to the two connecting ends 8b of the secondary side connecting parts 8b for the other telephone terminals. There is.
As shown in FIG. 4, the repeater 6C for telephone terminals enables connection of the exchange 2 via one primary side cable 4 of four telephone terminals 3B. A secondary side connecting portion 8B for four telephone terminals is provided, and the connecting end 7a of the primary side connecting portion 7 is divided into four groups from the first to the fourth, and the two connecting ends 7a of the first group are connected to each other. The two connecting ends 8b of the secondary side connecting portion 8B of No. 1 are connected to the two connecting ends 7a of the second group, and the two connecting ends 8b of the second secondary side connecting portion 8B are connected to the two connecting ends 8b of the second group. One connecting end 7a is provided with the connecting end 8b of the third secondary side connecting portion 8B, and two connecting ends 7a of the fourth group are provided with two of the fourth secondary side connecting portion 8B.
One connecting end 8b is connected to each other. That is, according to the repeater 6A for the data terminal, one of the conductors 4a of the one primary side cable 4 can connect one data terminal 3A to the exchange 2, while the remaining four allow another one to be connected. The data terminal 3A can be connected to the exchange 2, and according to the mixed relay 6B, one data terminal 3A can be connected to the exchange 2 by four of the conductors 4a of one primary side cable 4, while the remaining 4 One of the telephone terminals 6B can be connected to the exchange 2 by two of the books, and the other one of the data terminals 6B can be connected by the remaining two. According to the repeater 6C for the telephone terminal, one conductor 4 of the primary side cable 4
Four telephone terminals 3B each having two pairs of a
Each can be connected to the exchange 2 separately. The connecting portion 2a of the secondary side 2B is composed of a connector, and similarly, the primary side connecting portion 7 and the secondary side connecting portion 8 are also composed of connectors. That is, the connection structure between the secondary side 2B and the primary side cable 4 is such that one of the removable male and female members 9A and 9B of the connector is attached to the secondary side 2B and the other is attached to the primary side cable 4, respectively. Also, the connection structure between the primary side cable 4 and the repeater 6 is such that one of the removable male and female members 10A and 10B of the connector is attached to the primary side cable 4 and the other is attached to the repeater 6, respectively. Similarly, the connection structure between the repeater 6 and the secondary side cable 5 is also a detachable male and female member 11 of the connector.
One of A and 11B is attached to the repeater 6, and the other is attached to the secondary side cable 5, respectively. According to the above configuration, it is possible to connect the plurality of terminals 3 to the exchange 2 with one primary side cable 4. And the primary side cable 4
1 by selecting the specifications of the repeater 6 to be connected to
The combination of the terminals 3 that can be connected to the exchange 2 can be changed with the primary cable 4 of the book. That is, two data terminals 3A can be connected by selecting the data terminal repeater 6A as the repeater 6, and one data terminal 3A and two telephone terminals 3B can be connected by selecting the mixed repeater 6B. Therefore, by selecting the repeater 6C for the telephone terminal, the four telephone terminals 3B can be connected. In the above embodiment, the combination of the conductor 4a with the eight primary side cables 4 and the number of conductors required for communication is four and two, respectively, the data terminal 3A and the telephone terminal 3B is shown. It is applicable if the number of conductors 4a of the primary side cable 4 is a multiple of the number of conductors required for communication by the terminal 3 to be connected, if the primary side cable 4 and the terminal 3 are present.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

[Figure 1] System diagram

FIG. 2 is a schematic configuration diagram of a repeater for a data terminal.

FIG. 3 is a schematic configuration diagram of a mixed repeater.

FIG. 4 is a schematic configuration diagram of a repeater for a telephone terminal.

[Explanation of symbols]

 4a conductor 4 primary side cable 3 terminal 2 exchange 5 secondary side cable 7 primary side connection part 8 secondary side connection part 6 repeater

Claims (3)

[Claims] 1. A communication secondary-side cable (5) for connecting a communication primary-side cable (4) having a plurality of conductors (4a) to an exchange (2) and connecting to a terminal (3). A local communication system connected to the primary side cable (4) via a repeater (6), wherein the number of conductors (4a) required by each of the terminals (3) is the same. To connect a plurality of terminals (3) with a combination whose sum is less than or equal to the number of conductors of the primary side cable (4) to the exchange (2),
A local communication system in which each of the secondary cables connected to the plurality of terminals (3) is connected to different conductors (4a) of one primary cable (4). 2. A primary side connecting part (7) having a connecting end (7a) for connecting to each of a plurality of conductors (4a) of a communication primary side cable (4) connected to an exchange (2). , A secondary side connecting part (8) for connecting to a secondary side cable (4) for communication connected to a terminal (3), wherein the secondary side connecting part 8 is provided. A repeater in which a plurality of secondary side connection parts (8) are provided and each of the plurality of secondary side connection parts (8) is connected to a different connection end (7a) of the primary side connection part (7). 3. The repeater according to claim 2, wherein each of the primary side connecting portion (7) and the plurality of secondary side connecting portions (8) is composed of a connector.