JP2560853B2 - Relay device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a trunk line device, and in particular, to a supervisory signal transmission path receiving path (control path) for connecting a supervisory signal and a dial number to a transmission terminal device by an on / off control signal, The present invention relates to a trunk line device having a level adjusting unit and a trunk line as main components and having a transmission channel and a reception channel (speech channel) that are connected to a transmission terminal device from an exchange switch.

[Conventional technology]

In conventional trunk line devices, especially in trunk lines devices in corporate communication networks, OD trunk line devices that are connected to an OD circuit that monitors a transmission line by an on / off control signal of a frequency outside the voice band and exchanges dial numbers are mainstream. is occupying. When branch offices, branches, and factories, which used to operate individually, connect differently over the local area, as in recent years, the equipment of the trunk line equipment that connects to the IB line that sends and receives the supervisory signal by the frequency in the voice band has become available. Will be needed. However, due to the small number of IB lines, OD relay line equipment was installed in principle, and measures were taken to add an IB signal generator for IB lines.

FIG. 4 is a connection diagram showing an example of a conventional device. Fourth
In the figure, the exchange switch 30 is controlled by a call control device 31, and accommodates an OD trunk line device 80 and a telephone (not shown).
Are exchanged and connected to each other. When the OD relay line device 30 is connected to the OD circuit transmission terminal device 81, the communication line and the control line (SS line,
SR line) is separately provided, and the OD line transmission terminal device 81 converts the ON / OFF control signal of the control line and the ON / OFF control signal by the frequency outside the voice band of the transmission line.

When connecting to the IB line transmission terminal device 82, the OD relay line device 80 connects the speech path and the control path to the IB signal generator 90,
The IB signal generator 90 mutually converts the on / off control signal of the control path and the on / off control signal of the communication path by the frequency in the voice region on the transmission path.

Next, a conventional device will be described with reference to FIGS. 5 and 6. FIG. 5 is a functional block diagram showing an example of a conventional OD relay line device, and FIG. 6 is a functional block diagram showing an example of a conventional IB signal generator.

In FIG. 5, the OD relay line device has level adjusting units 11 and 12, a PB signal connecting unit 13, and a relay loop 14. The level adjusting units 11 and 12 are provided on the conversion switch side and the transmission terminal device side, respectively. The PB signal connection unit 13 connects the transmission path input from the exchange switch via the level adjustment unit 11 to the PB.
The signal is connected to the PB signal transmission line 15 for inputting the signal and output to the level adjusting unit 12. The PB signal referred to here is a selection signal by an audible frequency generated by the push-button dial operation (Electronic Information and Communication Handbook, The Institute of Electronics, Information and Communication Engineers, 1988 edition, P20.
46). The transmission / reception channel of the level adjustment unit 12 is connected to the transmission terminal device via the relay line 14. The receiving path from the transmission terminal device is connected to the exchange switch via the relay line 14 and the level adjusting units 12 and 11 in this order. The PB signal receiving path 16 for receiving the PB signal from the receiving path is connected to the connecting line between the relay loop 14 and the level adjusting unit 12.

In addition, the OD relay line equipment transmits the supervisory signal called SS line and SR line by the SR system supervisory signal (Electronic Information and Communication Handbook (described above) (P2047)) that exchanges the DC on / off control signal with the transmission terminal equipment. Path 17 and receive path 18
have.

In FIG. 6, each terminal on the relay line device side is connected to each terminal on the transmission terminal device side in FIG. 5 to form FIG. In FIG. 6, the IB signal generator is an IB signal transmitter 2
1, IB signal transmitter 22, IB signal detector 23, IB signal connector 2
4, relay wires 25 and 91, and a level adjusting unit 92.

IB signal is in the voice band, that is, audible frequency is 2,300H
It is a supervisory signal transmitted via the communication path by z. IB
The signal generator 21 has an IB signal oscillator, and the Ib signal transmitter 22
Inputs the supervisory signal received from the OD relay line device to the terminal SS through the supervisory signal transmission path 93, and outputs the IB signal to the IB signal connection unit 24 according to the input supervisory signal. The IB signal output unit 24 outputs the output of the IB signal transmission unit 22 and the relay loop 14 (the fifth loop) of the OD relay line device.
(From the figure) is connected to the transmission line output via the relay line 91 and the level adjusting unit 92 to connect to the transmission terminal device.
Output to.

The IB signal detection unit 23 is coupled at the output side of the level adjustment unit 92 to the reception path connected from the transmission terminal device to the relay line 91 via the relay line 25-level adjustment unit 92, and outputs the IB signal on the reception line. The signal is received, detected, and output as a DC signal to the terminal SR via the supervisory signal receiving path 94 and connected to the OD relay line device.

[Problems to be Solved by the Invention]

As described above, when the conventional trunk line device is connected to the trunk line by the monitoring signal of the in-voice band frequency, the trunk line device by the monitoring signal of the main out-of-voice band frequency is used as standard equipment, and the Since the signal generator that generates the monitoring signal is configured to be additionally connected, the equipment that is duplicated between the trunk line device and the signal generator, that is, a part of the trunk line and the level adjustment unit, is particularly small. The in-house communication terminal device has a problem that the economical efficiency of the equipment is deteriorated.

An object of the present invention is to provide a relay line device that solves the above problems by always providing a common circuit for different signal systems and making the different portion an additional portion.

[Means for Solving the Problems] A relay line device of the present invention includes a first relay line connected to a transmission line of a call signal transmission line connected to a transmission terminal device and a second relay connected to a reception line. A wire ring, first and second level adjusting units for adjusting the level of transmission / reception of a call signal between the call paths of the first and second relay wire lines and the exchange switch, and connecting to the transmission terminal device. And a monitoring signal transmitting path capable of transmitting a first control signal including a monitoring signal for transmission, and a second control signal connectable to the transmission terminal device and including a monitoring signal for reception In a relay line device having a monitoring signal receiving path capable of being, an IB signal transmitting section for generating an IB signal for transmission which is a monitoring signal for the transmission at a predetermined voice band frequency,
From an IB signal transmission unit that sends out the IB signal of the transmission from the IB signal transmission unit to the IB signal connection unit by the first control signal from the monitoring signal transmission path, and a reception signal from the IB signal connection unit An IB addition circuit including an IB signal detection unit that detects a reception IB signal including the reception monitoring signal, converts the reception IB signal into the second control signal, and sends the second control signal to the monitoring signal reception path; And an IB signal connection unit for connecting to the relay loop of No. 1 to combine and output a transmission signal and the transmission IB signal and receiving a combination of the reception signal and the reception IB signal, and this IB signal connection unit. A first level adjusting section connected to the first level adjusting section for adjusting the level of transmission / reception of the call signal to / from the call signal transmission path and transmitting the received call signal to the second level adjusting section; The exchange call is received from the reception call signal from Wherein said second level adjusting portion for adjusting a level of the transmission and reception of the speech signal, predetermined as the transmitted signal from the second level adjusting portion for
Between the PB signal connection part for synthesizing the PB signal from the PB signal transmission path and sending it to the first level adjustment part, between the IB addition circuit and the IB connection part, the supervisory signal transmission path and the supervisory signal reception path And an attaching / detaching mechanism with a connection terminal capable of attaching / detaching the IB additional circuit, and further, the first level adjusting unit and the
Between the IB signal connection units, the IB signal connection unit for testing the communication signal transmission line and the communication path side of the exchange switch from the first level adjustment by separating the signal lines. It has a line disconnection part.

The relay line device according to the above means is suitable for the OD type relay line and can be applied to the in-band IB type by additionally connecting the IB addition circuit. Further, since the line disconnection part separates the boundary point between the OD system part and the IB system addition part, level adjustment and testing can be easily performed.

〔Example〕

Next, the relay line device of the present invention will be described with reference to the drawings.

FIG. 1 is a functional block diagram showing an embodiment of the present invention, FIG. 2 is a schematic diagram showing an example of connection of the device shown in FIG. 1, and FIG. 3 is three examples of line disconnecting parts shown in FIG. FIG.

1 and 2, the relay line device 10 of the present embodiment
Is a call signal transmission line (call line) connected to the transmission terminal device.
Of the relay line 14-1 connected to the transmission path of the relay line and the relay line 14-2 connected to the reception line, and transmission / reception of a call signal between the communication lines of the relay lines 14-1 and 14-2 and the exchange switch 30. Level adjusting units 11 and 12 for adjusting the level of the control signal, and a monitor signal transmission path (control path, SS line) that can be connected to the transmission terminal device and can transmit the first control signal including the monitor signal for transmission. ) 1
7 and a supervisory signal receiving path (control path, SR line) 18 that can be connected to a transmission terminal device and can receive a second control signal including a supervisory signal for reception. An IB signal transmission unit 21 that generates an IB signal for transmission that serves as a monitoring signal for the transmission at a frequency within the voice band
And an IB signal transmission unit 22 for transmitting the IB signal transmitted from the IB signal transmission unit 21 to the IB signal connection unit 28 by the first control signal from the monitoring signal transmission path (SS line) 17, and an IB signal connection Part 28
The IB signal of the reception including the monitoring signal of the reception is detected from the reception signal from and is converted into the second control signal, and the monitoring signal reception path (SR
IB addition circuit 20 including an IB signal detector 23 for sending to the line 18
, And the transmission line and the transmission IB by connecting to the trunk line 14-1 and 14-2.
An IB signal connection unit 28 for combining and outputting a signal and receiving a combination of a reception signal and a reception IB signal, and this IB signal connection unit
A level adjusting unit 12 which is connected to 28, adjusts the level of transmission / reception of a call signal to / from a call signal transmission path (call path), and sends the received call signal to the second level adjusting unit 11, and a level adjusting unit.
A level adjusting unit 11 that receives a call signal received from 12 and adjusts the level of transmission and reception of a call signal to and from the communication path of the exchange switch 30, and a transmission signal from the level adjusting unit 11 and a PB signal transmission path that is predetermined. A PB signal connection unit 13 that combines the PB signal from 15 and sends it to the level adjustment unit 12, and an IB addition circuit 20.
An IB signal connection unit 28, a supervisory signal transmission path (SS line) 17 and a supervisory signal reception path (SR line) 18 are provided with a detachable mechanism with detachable connection terminals 32, 33, 34, 35 of the IB additional circuit 20. Between the level adjusting section 12 and the IB signal connecting section 28, the signal path is separated from the IB signal connecting section 28 to the call signal transmission path (call path) and the level adjusting section 12 to the call path side of the exchange switch 30. It has a line disconnection section 29 so that it can be tested.

Incidentally, in FIG. 1, the same components as those of the conventional example shown in FIGS. 5 and 6 are given the same reference numerals in the present embodiment.

Moreover, in FIG. 1, the IB relay system is shown.
Shows a state in which the additional circuit 20 is connected to the IB connection unit 28, the supervisory signal transmission path (SS line) 17 and the supervisory signal reception path (SR line) 18,
Supervisory signal transmission path (SS line) 17 and supervisory signal reception path (SR line)
18 is not connected to the transmission terminal device.

In the case of the OD relay system, the relay line device 10 of the present embodiment always has a supervisory signal transmission path (SS line) 17 and a supervisory signal reception path (SR line) 18, and in the case of the IB relay system, an IB addition circuit. 20 is connected to the IB signal connection unit 28, the supervisory signal transmission path (SS line) 17 and the supervisory signal reception path (SR line) 18 via connection terminals 32, 33, 34, 35,
The IB signal transmission unit 22 is controlled by the control signal from the monitoring signal transmission path (SS line) 17, the IB signal transmitted from the IB signal transmission unit 22 is transmitted via the relay ring 14-1, and the relay line is also transmitted. ring
The received IB signal received via 14-2 is the IB signal connection section.
The signal is detected by the IB signal detector 23 via 28 and is sent to the supervisory signal receiving path (SR line) 18.

Next, according to FIG. 2, the trunk line device 10 without the IB addition circuit 20 can be connected to the transmission terminal device of the OD line on both the speech path and the control path. The connection path is a signal transmission / reception path (SS line, SR line) for the SR system supervisory signal. I to trunk line device 10
When the B additional circuit is installed, only the speech path can be connected to the transmission terminal device and the IB line can be used.

Next, the line disconnecting section 29A shown in FIG. 3 (A) has contact spring terminals of the communication path 50A, and the disconnecting tool 41 is provided with conductors on both sides and insulated at the center. Is inserted between the springs to separate the communication path, and each electric conductor of the cutting tool 41 is connected to, for example, a test device.

The line disconnection section 29B shown in FIG. 3 (B) uses the shorting tool 42 which draws out the disconnection section of the communication path 50B to the terminals and short-circuits the circuit during operation. Short-circuit tool 42 during the test
A test jack is used instead of.

In addition, the circuit breaker 29C shown in FIG.
Insert a manual switch that opens and closes the circuit in series at 0C, and realize the necessary division for testing and adjustment with the manual switch.

In the above-mentioned embodiment, the supervisory signal of the trunk line device has been described as the DC analog signal of the SS line / SR line, but when the exchange performs digital processing, the digital / analog conversion processing means including the exchange switch, that is, the code decoder in the communication path. (Commonly called codec), and a supervisory signal transmission / reception path signal converter is added as an interface device.

In the speech path of the above embodiment, a line disconnection portion is provided between the PB signal connection portion and the IB signal connection portion, which enables easier and more convenient adjustment / testing than the conventional terminal connection. .

〔The invention's effect〕

As described above, according to the trunk line device of the present invention,
Since the line connection function with SR system supervisory signal by the main out-of-voice frequency band is basically installed, and the IB additional circuit is added to the line by the supervisory signal of the in-voice band frequency, the configuration is adopted. The effect is that there is no redundant deployment and economic efficiency can be improved.

Furthermore, by disposing the line disconnecting section in the communication path between the PB signal connecting section and the IB signal connecting section, adjustment and testing can be facilitated.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing an embodiment of the present invention, and FIG.
FIG. 3 is a connection diagram showing a connection example of the present invention, FIG.
(C) is a partial explanatory view showing a detailed example of the line disconnection part of FIG. 1, FIG. 4 is a connection diagram showing an example of the conventional art, and FIGS. 5 and 6 are functions showing the details of the conventional example, respectively. It is a block diagram. 10 …… Relay line device, 11,12 …… Level adjuster, 14-1,14
-2: Relay loop, 17: Monitoring signal transmission line (SS line), 18
...... Supervisory signal receiving path (SR line), 20 …… IB additional circuit, 21…
… IB signal transmitter, 22 …… IB signal transmitter, 23 …… IB signal detector, 28 …… IB signal connector, 29, 29A to 29C …… Line disconnector, 30 …… Exchange switch, 32, 33,34,35 …… Connection terminals.

Claims (1)

(57) [Claims] Claim: What is claimed is: 1. A first relay line connected to a transmission path of a call signal transmission line connected to a transmission terminal device, a second relay line connected to a reception line, and the first and second relay lines. First and second level adjusting units for adjusting the level of transmission / reception of a call signal between the line and the communication path of the exchange switch, and a first level control unit that can be connected to the transmission terminal device and includes a monitoring signal for transmission. A relay having a supervisory signal transmission path capable of transmitting a control signal and a supervisory signal reception path connectable to the transmission terminal device and capable of receiving a second control signal including a reception supervisory signal In a line device, an IB signal transmitting unit that generates an IB signal for transmission that serves as a monitoring signal for the transmission at a predetermined voice band frequency, and the IB signal for transmission from the IB signal transmitting unit is transmitted as the monitoring signal. According to the first control signal from the road And an IB signal transmitting unit for transmitting to the IB signal connection unit, and a reception IB signal including the reception monitoring signal from the reception signal from the IB signal connection unit is detected and converted into the second control signal to perform the monitoring. An IB adding circuit including an IB signal detecting section for sending to a signal receiving path;
The IB signal connection unit, which is connected to the second relay loop, outputs a combined transmission signal and the transmitted IB signal, and receives a combined reception signal and the received IB signal; A first level adjusting unit which is connected to a connecting unit, adjusts a level of transmission / reception of a call signal to / from the call signal transmission line, and sends the received call signal to the second level adjusting unit; and the first level. A second level adjusting unit that receives the received call signal from the adjusting unit and adjusts the level of transmission and reception of the call signal to and from the communication path of the exchange switch;
PB signal connection unit for synthesizing the transmission signal from the level adjustment unit and the PB signal from the predetermined PB signal transmission path and sending the synthesized signal to the first level adjustment unit, the IB addition circuit, and the IB connection. Section, the supervisory signal transmitting path and the supervisory signal receiving path, and an attaching / detaching mechanism with a detachable connecting terminal of the IB additional circuit, and between the first level adjusting section and the IB signal connecting section. In addition, a line disconnection unit is provided for enabling the signal line to be tested by separating the call signal transmission line from the IB signal connection unit and the call line side of the exchange switch from the first level adjustment. A relay line device having.