JPH03235566A - Common line signal transmitter-receiver - Google Patents

Abstract

PURPOSE:To attain the transmission reception of a common line signal by using an MF selection signal for a common line signal for a digital private line. CONSTITUTION:A control signal including a selection signal is used via a route of trunk 16 time division multiplexer 18 digital private line 13 time division multiplexer 19 trunk 17 separately during data communication, then the transmission reception of the control signal is attained even during talking. In this case, an MF oscillator 22 of a PBX (exchange) 11 sends an MF signal and the MF signal is received by an MF receiver 25 to decode the common line signal. Moreover, a caller address, a caller restriction class and a tenant or the like in addition to the destination number as the selection signal are sent to an opposite PBX 12. Thus, the transmission reception of the common line signal is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a common line signal transmitting/receiving apparatus, and more particularly to a common line signal transmitting/receiving apparatus capable of transmitting control signals using a digital dedicated line.

Conventional technology In a device that connects multiple exchanges (hereinafter referred to as PBX) with lines to form a network and send and receive data, in order to easily transmit control signals, data transmission paths and control cables are used. There is a device that employs a common channel signal system in which signals are separated from each other, and a conventional example of such a common channel signal transmitting/receiving device is shown in FIG. In this figure, 1 and 2 are PBXs that perform data transmission with each other, 3 is a digital dedicated line that sends digital data during, for example, intra-company communication, 4 is a signal line that sends various control signals, and 5 and 6 are digital Dedicated line 3 and each PBXI
, 2, and each PBXI, 2
Trunks 7 and 8 are provided in the traffic areas of the signal, 14 and each PBX 1.2, and have an interface with each PBX I, 2, 9 is a telephone connected to the PBXI, 1o is PBX2
is a phone connected to the In such a common channel signal transmitting/receiving device, for example, the telephone 9 calls the other party's telephone 10 and performs a telephone conversation and other communications. In this case, the control signal is only selection signal (dial) information sent to the other party's PBX 2.

Problems to be Solved by the Invention However, in such a common line signal transmitting/receiving device, when using the digital dedicated line 3, it is not possible to transmit and receive information other than the selection signal like the common line signal. First, there was a problem in that control signals could not be sent and received between PBX1 and PBX2.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a dedicated line network that is capable of transmitting and receiving common line signals.

Means for Solving the Problems In order to achieve the above object, the present invention provides an MF oscillator that allocates at least one channel to a digital private line as a common line and transmits an NIF signal during a transmission operation;
An MF receiver receives the F signal, sends it to the common line channel of the ~1F diphthong digital dedicated line output from the MF oscillator, and directs the MF signal sent through the common line channel to the MF receiver. The main feature is that the common line signal transmitting/receiving device is equipped with a control unit for transmitting signals.

Since the working digital private line channel is assigned as a common line, one PBX generates a control signal using the XIF signal and transmits it to the other PBX through the digital private line channel.

Therefore, by using the MFF signal, which is originally used in PBXs, as a common line signal, a network using the common line signaling system can be constructed on a digital dedicated line.

Embodiment FIGS. 1 and 2 are diagrams showing an embodiment of a common line signal transmitting/receiving apparatus according to the present invention. In these figures, symbols 11 and 12 are PBs that perform data transmission with each other, respectively.
14.15.16
．． 17 is a trunk provided in the digital-only A113 and each PBXII, 12 and the outgoing part, and has an interface with each PBXII, 12; 18 is a PBXll
19 is a time division multiplexing device that switches over data on the trunk 14 side and data transmission on the trunk 16 side between the PBXl 2 and the digital private line 13 in a time division manner; Transmission and trunk 1
20 is a telephone connected to PBXII, 21 is PBX.
22 is an MF oscillator that is connected to PBXII and sends an MFF signal when transmitting data; 23 is an MF receiver that is connected to PBXII and receives ~1F diphthong when receiving data; 24 is connected to PBX12 and transmits an MFF signal when transmitting data. MF oscillator that sends MFF signal, 25 is PB
This is an MF receiver that is connected to Xl2 and receives ~1F diphthongs when receiving data. In this equipment, PBXI
I, 12 sends the S, IF signal output from the MF oscillator to the common line channel of the digital dedicated line, and also transmits the MFF signal sent through the common line channel to the hvF receiver. It has a built-in program and CPU as a control section. Also, at least one of the plurality of channels of the digital dedicated line 13
Channels are assigned as common lines.

The operation of the common channel signal transmitting/receiving device having such a configuration will be described below with reference to FIGS. 1 and 2.

First, it is assumed that one channel of the digital dedicated line 13 is in communication between the PBXII and the PBXl2 (the MF oscillator 22 and the MF receiver 23 are connected to this channel on the PBXII side).

Similarly, for the dedicated line 13 channel, PBXI
On the I side? vl F oscillator 22 and MF receiver 23 are connected. In FIG. 1, from telephone 20 to telephone 21
When making a call to Trunk 1, telephone 20
4 and dials the companion telephone 210 number as a selection signal, and sends that information to the communication channel ``Trunk 14-''.
It is transmitted via the route: time division multiplexer 18 - digital leased line 13 - time division multiplexer 19 - trunk 15° (
call setup). As a result, the transmission route of the selection signal and the communication path become the same. The other party's telephone 21 receives a call setting acceptance signal for the second call setting, and further receives a ringing signal and a response signal. When the digital dedicated line 13 is established between the PBXII and 12, data communication is performed between the two. Then, when the data communication ends, the PB
A disconnection signal is sent from the XII side, and P B
A signal instructing line release is transmitted from the X i 2 side. Then, when the PBXII releases the line, it transmits a release completion signal to the PBX 12 and ends the series of data communications.

In the present invention, during such data communication, the regulation signal including the selection signal is transmitted from the trunk 16 to the time division multiplexer 1.
By using it as a separate route (common line) for 8-digital dedicated line 13-time division multiplexer 19-trunk 17'', it is possible to send and receive control signals even during a call.

In this case, on the PBXII side, the 'yIF oscillator 22 sends out the νIF signal, and this \IF signal is received by the SiF receiver 25 and interpreted as a common line signal. Furthermore, the selection signal such as the destination number, calling address, caller's restriction class, tenant, etc. is sent to the destination PBX.
It can be sent to 12.

As described in detail, according to the present invention, since the MP selection signal is a common line signal of the digital dedicated line, there is no need to complicate the hardware configuration (such as a common line signal transmission/reception system). can be taken.

For this reason, it is possible to use the network efficiently, and it is possible to connect two PBXs by combining the systems between the PBXs.
Various effects can be obtained, such as being able to use the PBX as a single PBX.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a common channel signal transmitting/receiving device according to the present invention, and FIG.
A sequence diagram showing a communication procedure between BXs, and FIG. 3 is a block diagram showing an example of a conventional communication device. 11.12...PBX 13...Digital leased line 14.15.16.17...Trunk 18.One...Time division multiplexer 20.21...Telephone 22.24...MF Oscillator 23.25...MF receiver

Claims (1)

[Scope of Claims] A plurality of exchanges that mutually transmit and receive data, a digital dedicated line to which at least one channel is assigned as a common line and connected between the exchanges, and an MF oscillator that emits an MF signal during a transmission operation; An MF receiver that receives an MF signal during a reception operation, and an MF signal output from an MF oscillator that is sent to the common line channel of the digital dedicated line, and that also sends the MF signal sent through the common line channel to the MF receiver. A common line signal transmitting/receiving device comprising: a control unit for transmitting data to a common line signal transmitting/receiving device;