JPH0495494A - Digital electronic key telephone system - Google Patents

Abstract

PURPOSE:To connect a dedicated digital key telephone set and general analog individual telephone sets not through an adapter by sharing a digital signal transmitting and receiving circuit and an analog voice signal transmitting and receiving circuit. CONSTITUTION:A telephone set interface 5a shares the transmitting and receiving means for an analog voice signal and a transmitting and receiving means for a digital voice signal to enable the dedicated digital key telephone set to be connected to general analog individual telephone sets 4a-4m not through an adapter. Further, the number of analog/digital converting means 6a and 6b is less than the number of analog channels and digital channels, so one means 6a and one means 6b are not necessary for the analog channels and the digital electronic key telephone system 100 can be constituted at low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a digital electronic button telephone device to which a dedicated digital button telephone and a general-purpose analog standalone telephone can be connected without the need for an adapter.

BACKGROUND OF THE INVENTION Conventional digital electronic key telephone devices are equipped with an interface circuit for a dedicated digital key telephone to which a dedicated key telephone can be directly connected without the need for an adapter. Furthermore, by connecting a dedicated adapter to the interface section for a dedicated digital button telephone, a digital audio signal can be converted into an analog audio signal, and a general-purpose analog standalone telephone can be connected.

Problems to be Solved by the Invention However, in the above-mentioned conventional electronic button telephone device, the telephone connection section is equipped with an interface for a dedicated digital button telephone, but an interface for a general-purpose analog standalone telephone is provided. Therefore, in order to connect a general-purpose analog standalone telephone, it was necessary to connect an adapter to the telephone connection part and convert the digital audio signal to an analog audio signal.

The present invention solves these conventional problems,
It is an object of the present invention to provide a digital electronic button telephone device capable of connecting a dedicated digital button telephone and a general-purpose analog standalone telephone without requiring an adapter.

Means for Solving the Invention In order to achieve the above object, the digital electronic button telephone device of the present invention includes a communication current supply means for a general-purpose analog standalone telephone that also serves as a digital signal transmitter, and a means for transmitting and receiving analog voice signals. and a means for transmitting and receiving digital audio signals, and is capable of connecting both a general-purpose analog standalone telephone and a dedicated digital button telephone without using an adapter.

Furthermore, the digital electronic button telephone device of the present invention includes:
In order to achieve the above purpose, in addition to the above-mentioned telephone interface, analog voice signals or digital voice signals transmitted and received at the above-mentioned telephone interface are converted into digital voice signals or analog voice signals, and an analog voice communication path and a digital voice communication path are connected. and an analog/digital conversion means for connecting the two, and the number of the analog/digital conversion means is smaller than the number of analog communication paths and the number of digital communication paths.

Effects The present invention has the following effects due to the above structure. In other words, by sharing means for transmitting and receiving analog voice signals and transmitting and receiving digital voice signals in the telephone interface, it is possible to connect a dedicated digital button telephone and a general-purpose analog standalone telephone without using an adapter. become.

In addition, since the number of analog/digital conversion means is smaller than the number of analog communication paths and digital communication paths, one analog/digital conversion means is not required for each analog communication path, and digital electronic It becomes possible to construct a button telephone device at low cost.

Embodiment FIG. 1 is a schematic block diagram showing an embodiment of the digital electronic button telephone device of the present invention.

In FIG. 1, reference numeral 1 denotes a control means that controls all operations of the digital electronic button telephone device 100, and controls the digital voice exchange means 2 and the analog voice exchange means 3. The telephones (dedicated digital telephones or general-purpose analog telephones) 4a to 4n connected to the terminal are controlled. Further, the digital voice exchange means 2 is connected to the telephone interfaces 58 to 5n, and exchanges digital voices from the telephone interfaces 5a to 5n under the control of the control means 1. Similarly, the analog voice exchange means 3 transmits analog voice signals from the telephone interfaces 5a to 5n to the control means l.
Replace it under the control of

6a and 6b are analog/digital converters (indicated as A/D converters in the figure), which are required when exchanging digital audio signals and analog audio signals.

FIG. 2 shows a telephone interface 5a shown in FIG.
This is a more detailed configuration of 5n. In Figure 2, 7 is an analog interface, with two wires -
This is a 4-wire conversion hybrid circuit. 8 is a digital interface, which transmits and receives digital audio and
Control means 1 and dedicated digital telephones 48 to 4n shown in the figure
Sends and receives data between. 9a and 9b are current supply circuits that supply current to the telephones 4a to 4n and transmit analog voice signals and digital signals.

Next, the operation of the above embodiment will be explained. In the above embodiment, if the telephones 4a to 4n are dedicated digital telephones, current is supplied to the telephones 4a to 4n by current supply circuits 9a and 9b shown in FIG.
n transmits a command indicating that it is a digital telephone to the control means 1 through the digital interface 8. As a result, the control means 1 controls the digital voice exchange means 2 to make the communication system of the telephones 4a to 4n a digital communication path. Therefore, telephones 48-4n
Voice data sent to and received from the telephone is transmitted and received through the digital interface 8 by the current supply circuits 9a and 9b in the form of being superimposed on current.

Further, when the telephones 4a to 4n are general-purpose analog telephones, since no command indicating that they are digital telephones has been sent, the control means 1 controls the telephones 4a to 4n.
It is determined that 4n is a general-purpose analog telephone. As a result, the control means 1 controls the analog voice exchange means 3 to make the communication system an analog communication path. Therefore, voice data transmitted and received by the telephones 4a to 4n is transmitted and received through the analog interface 7. That is, calls between dedicated digital telephones are carried out by the digital voice exchange means 2, and calls between general-purpose analog telephones are carried out by the analog voice exchange means 3. Further, in the case of a call between a dedicated digital telephone and a general-purpose analog telephone, the analog/digital converters 6a and 6b bridge the digital communication path and the analog communication path.

As described above, according to the above embodiment, by sharing the digital signal transmitting/receiving circuit and the analog audio transmitting/receiving circuit in the telephone interfaces 58 to 5n, it is possible to connect a dedicated digital telephone and a general-purpose analog telephone without using an adapter. Furthermore, it is possible to have a digital communication path and an analog communication path independently inside the device, and to connect the digital communication path and the analog communication path through a smaller number of analog/digital converters than the number of each communication path. By connecting the two terminals, it is possible to construct a digital key telephone device for both digital and analog functions at low cost.

Effects of the Invention As is clear from the above embodiments, the present invention has the following effects.

-By sharing the digital signal transmitting/receiving circuit and the analog voice signal transmitting/receiving circuit, it is possible to connect a dedicated digital button telephone and a general-purpose analog standalone telephone without using separate interfaces, that is, adapters.

■In order to connect multiple analog communication paths to a smaller number of analog/digital converters than the number of analog communication paths using analog audio conversion means, one
There is no need for separate analog/digital converters, and a digital/analog dual-purpose digital button telephone device can be constructed at low cost.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram showing the extension system of a digital key telephone device in one embodiment of the present invention, and FIG.
FIG. 3 is a detailed block diagram of the telephone interface section shown in the figure. 1... Control means, 2... Digital voice exchange means,
3... Analog voice exchange means, 4a to 4n... Telephone (dedicated digital telephone or general-purpose analog telephone),
5a-5n...telephone interface, 6a, 6b...
... Analog/digital converter, 7... Analog interface, 8... Digital interface, 9a, 9b... Current supply circuit, 100... Digital electronic button telephone device. ％

Claims (2)

[Claims] (1) A general-purpose analog standalone telephone equipped with a telephone interface consisting of a communication current supply means for a general-purpose analog standalone telephone that also transmits digital signals, and a means for transmitting and receiving analog voice signals and digital voice signals. A digital electronic button telephone device that enables connection between a telephone and a dedicated digital button telephone without using an adapter. (2) Analog/digital conversion means for converting the analog audio signal or digital audio signal transmitted and received at the telephone interface into a digital audio signal or analog audio signal, and connecting the analog audio communication path and the digital audio communication path. 2. The digital electronic button telephone device according to claim 1, wherein the number of analog/digital conversion means is smaller than the number of analog communication paths and the number of digital communication paths.