JPH02192241A - Subscriber line carrier equipment - Google Patents

Abstract

PURPOSE:To send a call tone to each subscriber terminal equipment without provision of a call tone generator to an exchange by generating a call tone signal, inserting the signal in a data signal and sending the resulting signal to the exchange. CONSTITUTION:A call tone signal generating section 23 generates a prescribed call tone signal and a multiplex/demultiplex section 22 sends a multiplexed reception signal being the result of multiplexing the generated call tone signal onto a reception signal from an exchange 10 to a channel control section 24. Then a call tone sending means 24a of the channel control section 24 sends a call signal multiplexed on the multiplexed transmission signal to the multiplex demultiplex section 22 as a multiplexed transmission signal to the exchange 10 while taking over the call signal multiplexed on the multiplexed transmission signal onto a time slot of the channel upon the receipt of the call signal from the exchange 10. The multiplex/demultiplex section 22 demultiplexes the multiplexed transmission signal and sends the signal to the exchange 10 as the transmission signal of the specified channel number. Thus, even without provision of a call tone generator at the exchange 10, a caller subscriber terminal equipment receives the call tone.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is used for a subscriber line carrier device that is connected to an exchange through a data line and controls a general subscriber terminal,
The present invention relates to a subscriber line carrier device that improves the transmission method of Ring Back Tone (Ring Back Tone) signals.

〔overview〕

The present invention relates to a subscriber line carrier device that is connected to an exchange via a data line and controls a plurality of subscriber terminals connected by a subscriber line, in which a paging signal is generated to a calling subscriber and the calling subscriber By making it possible for the calling subscriber to receive a ringing tone even if the exchange does not have a ringing tone signal generating means.

[Conventional technology]

Conventionally, in the transmission of this type of ringing signal, when an originating station calls a partner station through an exchange, the originating subscriber receives the ringing tone from the exchange having a ringing signal generating device.

[Problem that the invention seeks to solve]

In the conventional ringing signal transmission described above, when an exchange that does not have a ringing signal generator and a subscriber terminal are connected via a subscriber line, the exchange cannot send the ringing tone to the subscriber terminal. Therefore, there was a drawback that a telephone could not be connected as is.

The object of the present invention is to eliminate the above-mentioned drawbacks so that even when the exchange does not have a ringing signal generator,
An object of the present invention is to provide a subscriber line carrier device that allows a calling subscriber to receive a ringing tone.

[Means for solving problems]

The present invention provides a ringing tone signal that generates a ringing tone signal in a subscriber line carrier device that is connected to an exchange through a data line and includes a channel control unit that controls a plurality of subscriber terminals connected by the subscriber line. a generation unit, and sends a multiplexed reception signal obtained by multiplexing the generated ringing tone signal with a reception signal from the data line to the channel control unit, and separates the multiplexed transmission signal from the channel control unit. a demultiplexing unit that sends out a transmission signal to the data line, and when the channel control unit detects a ringing signal, the channel control unit converts the ringing tone signal in the multiplexed reception signal into the time of the channel of the multiplexed transmission signal. The present invention is characterized in that it includes a ringing tone transmitting means that transmits a ringtone by transferring it to a slot.

[Effect]

The ring signal generator generates a predetermined ring signal, and the demultiplexer multiplexes the generated ring signal with the reception signal from the exchange and sends a multiplexed reception signal to the channel control section. do. When a ringing signal from the exchange is detected, the ringing tone transmitting means of the channel control unit transfers the ringing signal multiplexed into the multiplexed transmission signal to the time slot of the channel, and transmits the multiplexed signal to the exchange. It is sent to the multiplexer/demultiplexer as a converted transmission signal.

The demultiplexer separates this multiplexed transmission signal and transmits it to the exchange as a transmission signal of a predetermined number of channels.

Therefore, even if the exchange does not have a ringer,
The calling subscriber terminal can receive the ring tone.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the main part of an embodiment of the present invention, in which the data line (DS-1) is 1,5441
b/s.

A case is shown in which a line for transmitting 24 channels of multiplexed PCM signals is used. Further, FIGS. 2(a) to 2(6) are explanations showing the frame structure of each signal.

This embodiment is connected to the exchange 10 by a data line 61,
A subscriber line carrier device 20 includes a channel control section 24 that controls a plurality of subscriber terminals 30 connected by a subscriber line 62, and a ring signal generation section 23 that generates a ring tone signal 73; 1.5 from the data line 61.
The 2,084 Mb/s, 32 channel multiplexed received signal 72a multiplexed with the 44 Mb/s, 24 channel received signal 71a is sent to the channel control unit 24, and the channel 2.084 Mb/S, 32 channel multiplexed transmission signal from the control unit 24? 2b separated, 1,544 Mb/s,
The data line 61 serves as the 24-channel transmission signal 71b.
The channel control unit 24 includes a demultiplexing unit 22 that sends the multiplexed received signal to the switch 10, and when the channel control unit 24 detects the paging signal from the exchange 10, the channel control unit 24 outputs the multiplexed received signal? Ringing signal 73 in 2a
It includes a ringing tone transmitting means 24a that transfers the multiplexed transmission signal 72b to the time slot of the relevant channel and transmits the multiplexed transmission signal 72b.

In the figure, reference numeral 21 indicates an interface section 03-1 which performs interface control for connection with the exchange 10, reference numeral 40 indicates another line network, and reference numeral 50 indicates a calling subscriber terminal connected thereto.

The feature of the present invention is that in FIG.
3, a demultiplexer 22, and a ringing tone transmitting means 24a.

Next, the operation of this embodiment will be explained.

1 sent from the exchange 10 via the data line 61
, 544 Mb/s, 24 channels of data signals are:
03-1 Received by interface department 21, 1,544
The signal is input to the demultiplexer 22 as a received signal 71a of Mb/s and 24 channels. The demultiplexer 22 converts the received signal 71a into a 2.048 Mb/s, 32-channel multiplexed signal, and outputs the digits generated by the ringing tone signal generator 23 into specified time slots from time slots TS25 to TS32. Ringing signal 73 consisting of a signal
In this case, it is inserted into the TS 25 and output to the channel control section 24 as a multiplexed transmission signal 72a.

The channel control unit 24 detects a ringing signal in the multiplexed reception signal 72a from the exchange 10, and transfers the ringing signal 73 in the input multiplexed transmission signal 72a from the time slot TS25 to the detected time slot. time slot) TS 1, and is sent to the multiplexing/demultiplexing section 22 as a multiplexed transmission signal 72b.

The demultiplexing section 22 separates the manually input multiplexed transmission signal 72b and transmits it to the exchange 10 via the DS-1 interface section 21 and the data line 61 as a 1.544 Mb/s, 24-channel transmission signal 71b. do.

Then, the exchange 10 uses the time slot of the transmission signal 71b)
The ringing signal carried on TS 1 sends a ringing tone to the originating subscriber terminal 50 connected to the channel.

〔Effect of the invention〕

As explained above, the present invention generates a ringing tone signal in the subscriber line carrier, inserts it into the data signal, and transmits it to the exchange, thereby eliminating the need for each subscriber to install a ringing tone generator in the exchange. This has the effect of sending a ring tone to the user's terminal.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention. FIGS. 2(a) to 2(d) are explanatory diagrams showing the frame structure of each signal. 10...Switchboard, 20...Subscriber line transport device, 2
DESCRIPTION OF SYMBOLS 1...03-1 Interface section, 22... Demultiplexing section, 23... Ringing tone signal generation section, 24... Channel control section, 24a... Ringing tone transmitting means, 30. ...Subscriber terminal, 40...Line network, 50...Calling subscriber terminal, 61...Data line, 62...Subscriber line, 71
a... Received signal, 71b... Transmitted signal, 72a...
・Multiplexed received signal? 2b... multiplexed received signal, 73
...Ring signal.

Claims (1)

[Scope of Claims] 1. In a subscriber line carrier device connected to an exchange through a data line and equipped with a channel control unit that controls a plurality of subscriber terminals connected by the subscriber line, a ring tone signal is generated. a ringing tone signal generating section for generating a ringing tone signal, and transmitting a multiplexed reception signal in which the generated ringing tone signal is multiplexed with a reception signal from the data line to the channel control section, and multiplexed transmission from the channel control section. a demultiplexing section that separates the signal and sends it as a transmission signal to the data line, and when the channel control section detects a ringing signal, the channel control section converts the ringing tone signal in the multiplexed reception signal into the multiplexed transmission signal. A subscriber line carrier device comprising a ring tone transmitting means for transmitting a ring tone by changing the time slot of the channel.