JP2710569B2 - Contract line termination equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminating apparatus for a cable line, and more particularly to a terminating apparatus for a line required for communication between offices during construction or maintenance of a telecommunication system.

[0002]

2. Description of the Related Art Conventionally, this type of circuit line terminating apparatus has a function of terminating a circuit line, that is, adjustment of level and impedance, conversion of two / four lines, transmission / reception of a call signal, and connection with other line. It has functions such as connection and handset. As this connection line, a connection line provided outside the transmission band of the multiplex terminal equipment constituting the system or in the overhead, or an empty channel is used, and furthermore, a general public telephone line, private telephone line, or mobile radio line is used. Are used.

[0003] As described above, there are many types of lines to be used for the meeting lines, and their interface conditions are different from each other. Therefore, a dedicated meeting line termination device is used for each line. In a station where the lines are concentrated, the connecting lines may be connected to each other or extended. However, since the configuration differs depending on the system, each time the connecting line terminating device is designed and used exclusively for the system.

[0004]

As described above, in the prior art, a dedicated communication line terminating device is used for each line or each system, so that the communication system has recently become large-scale, and When a plurality of communication lines are concentrated in the network, a connection line terminating device is required for each line.

[0005] In addition, in a dedicated line termination device for a system having a function of connecting or extending the connected lines,
When the system is changed or added, it is necessary to change the inside of the system, but this cannot be dealt with promptly.

[0006] In particular, in the case of a change or extension work, there are many cases where a worker wants to extend a meeting line to a wireless line and perform a meeting call while moving, and in such a case, a dedicated device is used. Sometimes it is not possible to respond promptly.

As described above, in the conventional meeting line termination device,
Since the device is provided for each line, the entire device becomes large, and convenience in use is reduced. There is also a problem that the system cannot be changed or added when the system is changed or added because there is no versatility.

[0008]

According to the present invention, there is provided an apparatus for terminating a set-up line which connects a 2-wire type set-up line on the multiplex terminal side to a 4-wire type set-up line and a subscriber line of a public telephone line. A line interface unit having a function of arranging lines in a four-wire system, having the same level and impedance, and having a function of terminating a call signal for a subscriber line, and combining the three lines arranged by the line interface unit into one line , A three-junction type branching section for branching the line coupled by the coupling section into two lines, and adjusting the level and the impedance of one of the branching lines of the branching section to perform wireless communication. A radio interface unit connected to the branch line, a speaker unit for connecting the receiving side of the other branch line of the branch unit and amplifying and monitoring the audio signal, and connecting the other branch line of the branch unit. Said times And a telephone machine to perform three-party calling the two-party calls and line extended to the wireless hitting if line side of each hit if the line through the interface unit.

The coupling unit includes a switch circuit for individually turning on and off three lines from the line interface unit in response to a line selection signal from the telephone panel.

Further, the wireless interface unit may include a circuit for receiving a start signal from the telephone board and transmitting a start signal to a connected radio device.

[0011]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a system using the subordinate line termination device of the present invention. The connection line terminating device 1 includes a two-wire connection line 2 from a multiplex terminal device 7 installed in a station, a four-wire connection line 3 from a multiplex terminal device 8, and a public telephone line. Alternatively, it is connected to a subscriber line 4 of a private telephone line, while a low-power wireless telephone device 6 such as a transceiver is connected as an extension line. From the telephone board 18 of the optical line terminal 1, a two-way communication with the other station is performed via a transmission line or a subscriber line, and this communication line is extended to the low-power radio telephone device 6 for 3 communication. A two-way call can be made. In addition, a meeting call can be made while moving from the low-power wireless telephone device 6 on the terminal side.

FIG. 2 is a block diagram showing a circuit configuration of the circuit termination device 1. 2W interface circuit 11 is 2
The wire connection line 2 is connected, the two-wire line is converted to a four-wire line, and the level and impedance are adjusted to predetermined values.
The 4W interface circuit 12 connects the four-wire connection line 3 and adjusts the level and impedance to predetermined values while maintaining the four-wire connection line.

The SB interface circuit 13 connects the subscriber line 4, converts a two-wire line into a four-wire line, and adjusts the level and impedance to predetermined values. At the same time, the call signal is converted into an audible sound, and the call signal 102 from the telephone board 18 is converted into a dial signal. The subscriber line can be switched to a general subscriber telephone set 19 for use.

The coupling circuit 14 couples or branches three lines of four-wire type having the same level and impedance from each interface circuit into one line for each transmission direction. In some cases, the switch is turned on / off in response to the selection signal 101 from the telephone board 18 to select one of the three lines.

The branch circuit 15 is a bidirectional trifurcated branch circuit, and branches a four-wire circuit equally in three directions. The details of this branch circuit are as shown in FIG. That is, in the figure, six hybrid transformers 141 to 146 are used.
Is used to branch the four-wire line in three directions for each transmission / reception direction. Note that this branch circuit can be constituted by an operational amplifier.

The radio interface circuit 16 is a branch circuit 1.
The branch line from 5 is adjusted to the level and impedance on the wireless connection line 5 side. In addition, it receives the start signal 103 from the telephone board 18 and relays it to the wireless device.

The telephone board 18 connects the branch line from the branch circuit 15, and a two-party communication with the opposite station through the two-wire connection line 2, the four-wire connection line 3, and the subscriber line 4. Alternatively, the telephone has a telephone function for extending the contract line to the wireless contract line to perform a three-way call. The telephone panel may be provided outside the apparatus for use. The monitor speaker 17 receives the sound of the receiving side of the branch line from the branch circuit 15 and sounds the speaker.

Next, the operation and use of the present apparatus will be described. In this embodiment, a two-wire connection line 2 is used as the connection line.
Although this is an example in which three lines, that is, a four-wire connection line 3 and a subscriber line 4, are connected, any two lines or only one line may be connected and used. A call from each line is made by calling a speaker, and a call is made from the telephone board 18.
At this time, it is possible to talk with the other party at the same time on three lines, but it is also possible to select a necessary party by the selection signal 101.

This communication line is extended to the wireless communication line 5, and a low-power wireless telephone can be used to allow a speaker to talk while moving. That is, in this case, the activation signal 103 is transmitted from the telephone panel 18 to activate the radio device side. At this time, a telephone call can be made from the telephone board 18 and a three-way call can be made. The subscriber line 4 can be switched to the subscriber telephone 19 in the SB interface circuit 13. In this case, the line can be switched to the telephone board 18 after the subscriber telephone 19 receives the call signal.

In the embodiment described above, an example is described in which three connecting lines are connected. However, the number of connecting lines may be further increased. May be used.

[0021]

As described above, the circuit termination apparatus according to the present invention accommodates a plurality of connection lines, and can be mounted on the apparatus by using a simple coupling or branching circuit.
It is possible to communicate with the opposite station from any telephone board via an arbitrary communication line, and it is also possible to easily extend this communication line to the low-power radio telephone side for communication. Therefore, there is an effect that the whole device can be miniaturized and the versatility and convenience in use are remarkably improved.

[Brief description of the drawings]

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

FIG. 2 is a block diagram showing a circuit of a subordinate line termination device in FIG. 1;

FIG. 3 is a block diagram of a branch circuit in FIG. 2;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 connection line termination device 2 2-wire connection line 3 4-wire connection line 4 subscriber line 5 wireless connection line 6 low power wireless telephone device 11 2W interface circuit 12 4W interface circuit 13 SB interface circuit 14 coupling circuit 15 branch circuit 16 wireless interface circuit 17 monitor speaker 18 telephone panel 19 subscriber telephone

Claims (3)

(57) [Claims] 1. A two-wire connection line on the multiplex terminal side is connected to a four-wire connection line and a subscriber line of a public telephone line, and each line is made four-wire and the level and impedance are made equal. And a line interface unit having a function of terminating a call signal for a subscriber line, a coupling unit for coupling three lines arranged by the line interface unit to one line, and a coupling unit coupled by the coupling unit. A three-way branching unit for branching a line into two lines, a wireless interface unit for adjusting the level and impedance of one branching line of the branching unit to connect to a wireless connection line, A speaker unit for connecting the receiving side of the other branch line and amplifying and monitoring the audio signal; and a connection line for connecting the other branch line of the branch unit and connecting via the line interface unit. Person A telephone board for extending inter-calls and lines to the wireless subscribed line to perform three-way telephone calls. 2. The apparatus according to claim 1, wherein said coupling unit comprises a switch circuit for individually turning on and off three lines from said line interface unit in response to a line selection signal from said telephone panel. . 3. The wireless interface unit according to claim 1, further comprising a circuit for receiving a start signal from the telephone board and transmitting a start signal to a connected radio device.
And 3. The meeting line termination device according to 2.