JPS6232758A - Key telephone set - Google Patents

Abstract

PURPOSE:To effectively use an idle channel for data communications by permitting a main control part to control an idle highway channel and switching the highway channel for each interface unit. CONSTITUTION:An interface control part 8 detects outgoing information from a key telephone set and incoming information from a trunk line, while the main control part 1 detects the idle highway channel with the aid of a using channel memory part 5. Their numbers are written in a transmitting highway channel number memory part 2, periodically read in an interface part 4, and is multiplexed in terms of time division with the specified channel of the highway where a PCM signal outputted from a cordic part 7 is selected. On the other hand, an address in a receiving highway channel number memory part 3 is periodically read to select the receiving side highway, and the PCM signal of the specified channel is converted into an analog signal.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a button telephone device.

In particular, it relates to a button telephone device having pulse code modulation (hereinafter referred to as PCM) time division switching means.

Here, the term "key telephone equipment" refers to a telephone station that accommodates two to more than ten lines (including PBx subscriber lines) for several to several dozen button telephones in the same subscriber's premises;
A telephone device consisting of a button telephone equipped with function selection buttons, etc., and a main device equipped with control functions. in general,
It has the function of selecting and using a central office line, the function of making calls between key telephones, the function of holding and transferring a central office line, and other functions.

〔overview〕

The present invention utilizes highways and channels effectively by switching extension telephones and office line interfaces based on availability, instead of making them correspond fixedly to highways and channels, in a button telephone device having time-sharing switching means. It has been made possible to do so.

[Conventional technology]

In the conventional key telephone device, a fixed PCM highway number and channel number are given to each interface section at the time of initial setting.

[Problem that the invention seeks to solve]

In such a conventional button telephone device, the highway number and channel number for PCM multiplexing and demultiplexing are fixed for each interface unit, so even if there are highways and channels that are not in use, they cannot be transferred to other interface units. The disadvantage is that channels cannot be used effectively, and channels cannot be used effectively.

SUMMARY OF THE INVENTION The present invention aims to eliminate these drawbacks, and aims to provide a key telephone device having time-sharing switching means that allows efficient use of highways and channels.

[Means for solving problems]

The present invention provides a plurality of n interface sections each including a codec connected to a central office line or a telephone, a highway commonly connected to the interface section, a control bus commonly connected to the interface section, and a control bus commonly connected to the interface section. and a main control means connected to a control bus, wherein the main control means includes a means for specifying a channel to be received by each interface. highways are connected to each interface section, each interface section includes a switching circuit section for switching the highway system connected to the codec under the control of the main control means, and the main control means is connected to each interface section. The invention is characterized in that it includes means for specifying the highway system to be transmitted and the channel to be transmitted thereto.

[Effect]

The central office line or telephone is connected to the highway via an interface containing a codec. This interface includes a switching circuit that switches the connected highway. This switching circuit operates based on commands from the main control means.

Now, the sending interface with the connection request is connected to the vacant highway by the switching circuit by the main control means that monitors the vacant state. PCM using this highway
Channel control based on time-division switching is executed by the main control means, and the receiver of the connection request destination performs switching connection with the side interface.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be explained based on the drawings.

The figure is a block configuration diagram showing the configuration of the apparatus of this embodiment.

First, the configuration of this embodiment device will be explained based on the drawings.

This embodiment device includes a main control section 1, a used channel memory section 5, a sending highway channel number memory section 2, a receiving highway channel number memory section 3, and N interface sections 4. The interface section 4 includes an interface control section 8, a PCM highway channel switching circuit section 6, and a codec section 7.

The interface section 4, which includes a telephone interface section for accommodating a button telephone and a central office line interface section for accommodating a central office line, is connected to m branches each of the sending highway and the receiving highway, which are PCM time division multiplexed paths, and is connected to the telephone set or the central office line. Analog audio signals are sent and received 1
The books are connected one by one. A main control section 1 that controls N interface sections 4, a sending highway channel number memory section 2, and a receiving highway channel number memory section 3 are connected to a control bus.

Next, the operation of this embodiment device will be explained based on the drawings.

When outgoing call information from a button telephone or incoming call information from a central office line is detected by the interface control unit 8 and a call route setting request is input to the main control unit 1, the main control unit 1 transfers information from the used channel memory unit 5 to the highway and channel usage status are read out, and vacant highways and channels are detected.Here, each interface unit 4 is given a unique hardware address, and this address value is the sending highway channel number. Memory section 2
and uke are common memory addresses on the main control section 1 side and the interface section 4 side when accessing the memory of the highway channel number memory section 3, and are also the identifiers of each interface section 4. The vacant highway number and vacant channel number detected by the main control section 1 are written to the corresponding memory address of the sending highway/channel number memory section 2 using an identifier. on the other hand,
The interface unit 4 that outputs the call path setting request periodically reads out the corresponding address in the sending highway channel number memory unit 2, and inputs the sending highway channel number manually. As a result, the PCM highway channel switching circuit section 6 selects the transmitting highway, and converts the audio signal input to the codec section 7 into a PCM highway channel switching circuit section 6.
A synchronization signal that determines the channel position for multiplexing is input to the codec section 7. As a result, the PCM signal output from the codec section 7 is time-division multiplexed onto the designated channel of the selected highway.

Now, in the main control unit 1, the call destination identifier is detected from the dial information etc. from the interface unit 4 that issued the call path setting request, and the empty highway number and empty channel number detected on the transmitting side are determined according to this call path optical identifier. The received information is written to the corresponding memory address in the highway channel number memory section 3. Similarly to the transmitting side, each of the interface sections 4 periodically reads out the address corresponding to 8 in the highway channel number memory section 3, selects the highway on the receiving side, and transmits the time-division multiplexed PCM. A designated channel of the signal is converted to an analog audio signal.

In this way, time-sharing exchange using any channel on any highway is possible.

〔Effect of the invention〕

As explained above, the present invention manages vacant highways and vacant channels in the main control section, transmits communication path setting release information to each interface section via the highway channel number memory section, and manages highways and channels on a per-interface basis. By switching, it becomes possible to use highways and channels effectively, and there is an effect that vacant channels can be used for data communication.

[Brief explanation of drawings]

The figure is a block configuration diagram showing the configuration of an apparatus according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Main control section, 2... Sending highway channel number memory section, 3... Receiving highway channel number memory section, 4... Interface section, 5... Channel memory section used, 6 ... PCM highway channel switching circuit section, 7. Codec section, 8. Interface control section.

Claims (1)

[Claims] (1) A plurality of n interface sections each including a codec connected to a central office line or a telephone, a highway commonly connected to this interface section, a control bus commonly connected to this interface section, and this control and a main control means connected to a bus, and the main control means includes a means for specifying a channel to be received by each interface. each of the highways is connected to each interface section, each interface section includes a switching circuit section that switches the system of the highway connected to the codec according to the control of the main control means, and the main control means is connected to each interface section. A button telephone device characterized in that it includes means for specifying a highway system and a channel on which to transmit the highway system.