JPH06343113A - Button telephone deice - Google Patents

Abstract

PURPOSE:To switch in-use communication channels of an independent telephone set connecting circuit part for additionally connecting an independent telephone set, a modem, etc., to the digital telephone set of the button telephone set and to use them at the same time. CONSTITUTION:This device is provided with CODECs 43 and 44 for two data channels (B1 and B2), and with switches 45 and 46, a handset 48, the independent telephone set connecting circuit part 47, and the CODECs 43 and 44 are selectively switched and connected. Switching control over the switches 45 and 46 is performed through a control part 42 with channel specification keys of a key input part 49. While a telephone call of the handset 48 is made over the channel B1, a communication by a personal computer 9 is carried out by using the channel B2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a button telephone device,
In particular, the present invention relates to a key telephone device having a PCM type main device for connecting and accommodating a digital telephone.

[0002]

2. Description of the Related Art A button telephone device for handling voice information of the PCM system comprises a plurality of digital telephones and a PCM system main unit for connecting and housing these digital telephones. In this type of conventional button telephone device, a connection circuit for a single telephone is additionally provided for each digital telephone to additionally connect a single telephone, and in addition to a handset, a call can be made with this additional single telephone. is there.

[0003]

In such a conventional key telephone device, a telephone call can be made even with a single telephone added in addition to the handset. However, the connection circuit for a single telephone for additional connection with this single telephone is for communication. Since there is only one channel, it is not possible to use the handset call and this single telephone connection circuit at the same time.

In the PCM type key telephone device,
There are two data channels B1 and B2 as communication channels, but the number of used channels is fixed to one, and it is necessary to use a TDSW (time division switch) provided in the main device to switch the channels. However, there is a drawback in that the control of the TDSW for that is complicated.

An object of the present invention is to provide a key telephone device capable of simultaneously performing a handset call and a call using a connection circuit for a single telephone.

Another object of the present invention is to provide a button telephone device capable of easily controlling the switching of a call channel without performing complicated control of the TDSW of the main device.

[0007]

According to the present invention, a PCM
A main unit including an interface for processing digital voice information and having a B1 and B2 data communication channel and a D control channel, a communication unit connected to the interface for transmitting and receiving information of each channel, and connected to the communication unit A B1 and B2 channel codec section for performing voice codecs for the B1 and B2 data communication channels, respectively, a handset, a single telephone connection circuit section for connecting a single telephone, and the handset and single telephone connection circuit A digital telephone having control means for selectively connecting and controlling the B1 and B2 channel codec sections to each of the sections and a key input section for generating a control instruction for the control means. A button telephone device is obtained.

[0008]

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

FIG. 1 is a schematic block diagram of an embodiment of the present invention, in which a main unit 1 and a plurality of digital telephones 5.1 to 5.n connected and housed in the main unit 1 (n is an integer of 2 or more)
Consists of. The audio signal of the main unit 1 is PCM encoded and digitally processed.

The main unit 1 is composed of a plurality of digital telephones 5.
A plurality of digital telephone interfaces 3.1 to 1 to 3 for connecting 1 to 5 n, a PCM bus 24 forming a switching network for a plurality of voice signals, and a TDSW 2 for performing a voice signal exchange process It consists of

Interface 3 for each digital telephone
1 to 3 · n connect a PCM voice signal to the PCM bus 4 and have two data communication channels (B1 and B2 channels) having a communication speed of 64 kbps,
It has a control channel (D channel) having a communication speed of 32 kbps, and is adapted to communicate with the digital telephones 5.1 to 5.n via the transmission lines 6.1 to 6.n.

The two data communication channels are mainly used for transmitting voice signals, and the control channel is used for controlling the digital telephone.

On the other hand, the PCM bus 4 is connected to the TDSW 2, and the TDSW 2 is for exchanging voice signals from the digital telephone interfaces 3.1 to 3n.

In the key telephone device having such a structure,
For example, communication with the digital telephones 5.1 to 5.n is performed as follows. The voice signals respectively generated in both digital telephones 5.1, 5-2 are supported by the corresponding interfaces 3.1, 3.1 via the data communication channels of the transmission paths 6.1, 6.2.
It is sent to each of 3 and 2 and is superimposed on the PCM bus 4.
Further, the voice signal is exchange-processed by the TDSW 2, so that a call between the telephones 5.1 and 5.2 can be realized.

FIG. 2 is a concrete block diagram of the digital telephones 5.1 to 5n used in the embodiment of the present invention. In FIG. 2, only the digital telephone 5.1 is shown as an example, but other telephones 5 The same configuration is applied to 2 to 5 · n.

The communication unit 41 interfaces with the main unit 1 via the transmission line 6.1, and each channel (B1, B2
And D). The codecs 43 and 44 are connected to the communication unit 41 and perform audio codecs for the data channels B1 and B2, respectively. The switch 45 selectively connects either of the codecs 43 and 44 to the handset 48, and the switch 46 selectively connects either of the codecs 43 and 44 to the single telephone connection circuit unit 47. To do.

The control unit 42 controls the switches 45 and 46 according to a command from the key input unit 49. The single telephone connection circuit section 47 is a well-known circuit configuration for connecting the single telephone 7 and having functions such as ring tone output, current supply, 2-line / 4-line conversion, and loop detection for off-hook detection.

In such a structure, when the single telephone 7 communicates with the main unit 1 on the B1 channel, the caller first selects the B1 or B2 channel by the channel designation key (not shown) of the key input unit 49. Specify which one to launch. Upon receiving this designation, the control unit 42 issues a selection command to the switch 46 and controls the connection between the switch 46 and one of the codecs 43 and 44.

If the B1 channel is designated, the switch 46 and the B1 channel codec 43 are connected, and the analog voice signal generated by the individual telephone 7 is transmitted to the B1 via the individual telephone connection circuit section 47 and the switch 46.
It is sent to the channel codec 43.

The B1 channel codec 43 converts the received analog signal into PCM and outputs it to the communication section 41.
The M signal is sent to the main unit 1 via the transmission line 6.1.

On the other hand, the B1 channel audio signal sent from the main unit 1 is supplied to the communication section 41 via the transmission line 6.1, converted into an analog signal by the B1 channel codec 43, and sent to the individual telephone set 7. It will be sent.

Even when the independent telephone 7 communicates with the main unit 1 on the B2 channel, the control unit 42 responds to the B2 channel designation key input by the caller, as in the above-described operation.
Thus, the switch 46 is connected to the B2 channel codec 44, and communication becomes possible.

Also in the case of communication with the main unit 1 using the handset 48, the switch 45 enables selection of a desired channel (B1, B2) by the channel designation key of the key input section 49.

By setting the use priority of the handset 48 to be higher than that of the individual telephone 7, the competing use of the handset 48 and the individual telephone 7 on the same channel can be dealt with, but the B1 channel and the B2 channel are used. It is also possible to use and separately.

FIG. 3 is a diagram showing another embodiment of the present invention, in which the same parts as in FIG. 2 are designated by the same reference numerals. In this example, a personal computer (personal computer) 9 is connected via a modem 8 instead of the single telephone 7 in FIG. 2 so that the handset 48 and the personal computer 9 can be used simultaneously.

In this case, first, the channel designating key of the key input section 49 is used to designate in advance that both the handset 48 and the single telephone connection circuit section 47 are connected to one of the B1 and B2 channels. The caller makes a call via the modem 8 from the telephone book stored in the personal computer 9 in advance. If the communication is established by this call, the handset 48 realizes the call.

On the contrary, it is possible to switch from the call of the handset 48 to the communication of the personal computer 9. In this case, it is clear that the switching control of the TDSW 2 of the main device 1 is not necessary at all. Further, if the call of the handset 48 and the communication of the personal computer 9 are set to different channels, simultaneous communication becomes possible.

[0028]

As described above, according to the present invention, two data channels can be selected as desired by operating the caller's keys, so that the handset and the single telephone connection circuit can be used at the same time, and this single channel can be used simultaneously. Connecting a personal computer to the telephone connection circuit and making a call from this personal computer to switch the call to the handset has an effect that it can be easily performed without controlling the TDSW.

In particular, the B1 channel and the B2 channel can be simultaneously used for handset communication and communication using a modem (personal computer), so that there is an effect that two communication can be performed at the same time.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of an embodiment of the present invention.

FIG. 2 is a block diagram of a digital telephone according to an embodiment of the present invention.

FIG. 3 is a block diagram of a digital telephone according to another embodiment of the present invention.

[Explanation of reference numerals] 1 main device 2 TDSW (time division switch) 3.1 to 3 n interface 4 PCM bus 5.1 to 5 n Digital telephone 6 to 6 n Transmission line 7 Single telephone 8 Modem 9 PC 41 Communication unit 42 Control unit 43 B1 channel codec 44 B2 channel codec 45, 46 switch 47 Single telephone connection circuit unit 48 Handset 49 Key input unit

Claims (3)

[Claims] 1. A B1 for processing PCM digital audio information.
And a main device including an interface having a B2 data communication channel and a D control channel, a communication unit connected to the interface for transmitting and receiving information on each of these channels, and the B1 and B2 data connected to the communication unit. The B1 and B2 channel codec sections for respectively performing the codecs of the voices of the communication channels, the handset, the single telephone connection circuit section for connecting the single telephone, and the handset and the single telephone connection circuit section are respectively described above. A key telephone device, comprising: a digital telephone having a control unit for selectively connecting and controlling the B1 and B2 channel codec units and a key input unit for generating a control instruction for the control unit. 2. The key telephone device according to claim 1, further comprising a modem connected to the single telephone connection circuit section and a personal computer connected to the modem. 3. A plurality of the interfaces are provided, and a plurality of digital telephones are connected to each of these interfaces, respectively.
Alternatively, the key telephone device described in 2.