JPS6016037A - Radiotelephony multiplex channel connecting system - Google Patents

Abstract

PURPOSE:To attain the effective utilization of a channel by providing a circuit setting the number of assigned channels between a private branch of exchange and a telephone set terminal in the stage of calling to the telephone set terminal. CONSTITUTION:The private branch of exchange 1 transmits/receives a multiplexed electromagnetic wave channel to the telephone set terminal 10. When information used for a printer 7 and a light pen 8 at the same time is inputted to an input/output circuit 4 after the off-hook of a handset 6, the information is inputted to a channel selecting circuit 3, a control circuit 5 inputs the information from the circuit 4 to a syncyronism/channel selecting circuit 3, writes it in a transmission control block 14 and transmits it to the exchange 1 via a transmission/reception circuit 2. The information of the block 14 is given to a reception control block 12 of opposite side and transmitted to an opposite telephone set terminal. The exchange 1 is provided with a transmission time slot 15 and a reception time slot 13 assigned to the handset 6, the printer 7 and the light pen 8 according to the information of the block 14 in a multiplex channel, and the exchange 1 writes the information in which channel it is to be assigned to a reception control block 12 of an opposite terminal 10 and the transmission side at the same time thereby attaining the connection of two telephone set terminals.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connection method between an exchange and a telephone in a private branch exchange.

Conventionally, the method of converting a subscriber line of two telephones to wireless was carried out using only a single channel because each telephone did not have a function to discriminate between channels. For this reason, it was not possible to simultaneously and independently exchange and connect multiple wireless telephones, or to assign multiple channels to a specific telephone.

SUMMARY OF THE INVENTION An object of the present invention is to provide a channel connection system in which a plurality of channels are allocated to a wireless telephone terminal without a fixed allocation of channels used therein.

The present invention provides a transmitting/receiving circuit that transmits and receives electromagnetic waves to and from a private branch exchange and converts electromagnetic signals and electrical signals, a channel discrimination circuit that assigns channels to the telephone terminal and sets the number of assigned channels, and electrical signals that transmit these circuits. It is constructed with a control circuit that has a control function, and the allocation of communication channels used by telephones is not fixed.

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

There are various ways to multiplex channels using electromagnetic waves, such as frequency division and PCM, but this embodiment shows an example of PCM multiplexing. FIG. 1 shows a block diagram of an embodiment of the present invention in that case, and FIG. 2 shows an example of the format of a signal transmitted and received by electromagnetic waves. The embodiment shown in FIG. 1 is composed of the following blocks, and their functions are as shown below.

Private branch exchange 1 transmits and receives multiplexed electromagnetic wave channels to and from telephone terminal 10 . Transmission/reception circuit 2 is private branch exchange 1
It exchanges input and output using electromagnetic waves and converts electromagnetic waves and electrical signals. The synchronization/channel selection circuit 3 is the transmitter/receiver circuit 2
The channel used by the telephone terminal is set by synchronizing the electrical signals input and output with the telephone terminal. The input/output circuit 4 receives and receives input/output from the synchronization/channel selection circuit 3, and transmits/receives input/output from the handset 6. It receives and receives electrical signals from input/output devices such as the printer 7 and light ben 8. The control circuit 5 controls the flow of electrical signals in each of these circuits. Handset 6. The printer 7, light pen 8, and other input/output media 9 each perform the conversion of human-perceivable forms and electrical signals. The signal format shown in FIG. 2 is composed of the signals t- shown below, and the contents of each signal are as shown below. The synchronization signal 11 is a signal for synchronizing the telephone terminal and the private branch exchange 1 in the synchronization/channel selection circuit 3.

The reception control block 12 handles calls made by the private branch exchange 1 to individual telephone terminals, channel allocation 1, number of allocated channels,
This is a signal that sets information regarding exchange/connection such as channel disconnection. The reception time slot 13 is a signal composed of a plurality of channels that the private branch exchange 1 sends to individual telephone terminals. The transmission control block 14 records calls made by individual telephone terminals to the private branch exchange 1 and the number of channels allocated.

This is a signal that sets information regarding exchange/connection such as channel disconnection. The transmission time slot 15 is a signal composed of a plurality of channels sent from each telephone terminal to the private branch exchange 1. These five types of signals are included and configured within one frame (for example, one frame - 125 μS). A local telephone number is semi-fixed to each telephone terminal by a switch, and a specific transmission control block 14 and reception control block 12 are assigned to the telephone terminal based on this semi-fixed telephone number. Suppose that However, neither the reception time slot 13 nor the transmission time slot 15 is fixedly assigned to a particular telephone terminal. Regardless of whether a call is in progress or not, the telephone terminal is always synchronized, and the division circuit 5 periodically scans the reception control block 12 and transmission control block 14 assigned to the telephone terminal. There is.

The procedure for setting three types of channels, a voice communication channel, a printer channel, and a light pen channel, on the telephone terminal will be described below.

(1) After the handset 6 goes off-hook, information that the printer 7 and light pen 8 will also be used at the same time is input to the input/output circuit 4.

(2) The control circuit 5 inputs the above information from the input/output circuit 4 to the synchronization/channel selection circuit 3 and writes it into the transmission control block 14 of the telephone terminal.

(3) The signal from the transmission control block 14 sent to the private branch exchange 1 by the transmission/reception circuit 2 is superimposed on the signal from the reception control block 12 of the other party's terminal, and the signal is transferred to the private branch exchange 1.
is sent to the other party's telephone terminal.

(4) The other party's telephone terminal has a synchronization/channel selection circuit.
The contents of the reception control block 12 via 5-3 are sent to the control circuit 5.
When recognized, it activates the input/output circuit 4 to ring the bell of the handset 6, and at the same time rewrites the contents of the transmission control block 14 and sends it to the private branch exchange 1, instructing it to return the ring bank tone to the telephone terminal. .

(5) When the control circuit 5 of the other party's telephone terminal detects the off-hook of the handset 6 via the input/output circuit 4, it rewrites the contents of the transmission control block 14 and transmits it to the private branch exchange 1.

(6) The private branch exchange 1 operates the handset 6.in accordance with the transmission control block 14 in (2) above. Transmission time slots assigned to printer 7 and light pen 8 15. A reception control block 1 in which a reception time slot 13 is provided in a multiplex channel, and information indicating which channel is assigned to the same time slot is semi-fixedly assigned to the telephone terminal and the other party telephone terminal.
2, the two telephone terminals are connected.

(7) When the handset 6 of either telephone terminal is on-hook, the control circuit 5 recognizes this via the input/output circuit 4 and rewrites the transmission control block 14 of the telephone terminal to the private branch exchange 1. request to disconnect the channel.

(8), the private branch exchange 1 disconnects the channel, and the reception control block 1 assigned to the telephone terminal and the other party's telephone terminal
The contents of 2 are rewritten to the disconnected state and sent.

This example confirms the following effects. That is, the '
There may be a single channel or multiple channels assigned to a phone terminal, but the channel assigned to each telephone terminal is not fixed, so when making a voice-only call, only the voice channel is assigned to the telephone. If you want to connect a printer or light bender in addition to audio by setting it up between a terminal and a private branch exchange, you only need to set up another channel. Therefore, although the number of channels that may be used by an individual telephone terminal is plural, the transmission time slot 15. In principle, the number of channels within the reception time slot 13 may be equal to the number of all telephone terminals, and the limited channels can be used effectively.

As explained above, the present invention does not fix the channel allocation between the private branch exchange and the telephone terminal, but provides a circuit within the telephone terminal that sets the number of allocated channels at the stage of making a call. This has the effect of effectively utilizing the channel set between the exchange and the telephone terminal. Also, by making the subscriber line wireless, there is an effect that the telephone terminal can be easily moved.

[Brief explanation of the drawing]

The first factor is a block diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing an example of a signal format used in the embodiment shown in FIG. DESCRIPTION OF SYMBOLS 1... Private branch exchange, 2... Transmission/reception circuit, 3... Synchronization/channel selection circuit, 4... Input/output circuit, 5... Control circuit, 6... Handset, 7... Printer, 8... Light Ben. Agent Patent Attorney Toshiyoshi Somekawa 1

Claims (1)

[Claims] A circuit for transmitting and receiving multiple channels using electromagnetic waves is installed inside a telephone that performs voice calls, and the communication channels used by the telephone are not fixed in advance, but channel allocation and the number of allocated channels are set for the telephone at the stage of making a call. 1. A wireless telephone multichannel connection system in a private branch exchange, characterized by comprising circuits and a control circuit for controlling signals transmitted within these circuits.