JPH0334280B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wireless terminal connection control system, and particularly to a wireless terminal connection control system in an automatic exchange that connects wireless terminals accommodating wireless terminal telephones.

FIG. 1 is a diagram showing an example of a conventional wireless terminal connection control method of this type. In FIG. 1, the radio terminal system RT is composed of a radio terminal T accommodating radio terminal telephones B and B', a radio line RL set between radios R1 and R2, and a transport device C.
Connected to automatic exchange EX via signal converter TR. The wireless line RL is also shared by a plurality of wireless terminals (not shown) to connect to the automatic exchange EX.
The connection from extension telephone A accommodated in automatic exchange EX to wireless terminal telephone B is via the wireless line RL.
This is done by dialing the identification digits of the wireless terminal T and the identification digits of the wireless terminal telephone B, during which time other terminals sharing the wireless line RL and other telephones accommodated in the wireless terminal T B' is occluded. Furthermore, by operating a predetermined telephone key from the command desk DB, it is also possible to call all or some of the wireless terminal telephones B, etc. that share the wireless line RL at the same time, and make a command call. Now, when extension telephone A makes a call and dials in sequence the identification digits of radio circuit RL (e.g. 9), the identification digits of radio terminal T (e.g. 2) and the identification digits of radio terminal B (e.g. 3), automatic exchange EX
is a signal converter under the control of the central processing unit CC.
The trunk TRK connected to TR and the calling extension telephone A are connected by a path L1 within the network NW, and the identification numbers 2 and 3 are transmitted in the form of dial pulses to the signal conversion device TR via the trunk TRK. The signal converter TR counts the received dial pulses, converts them into a frequency signal within the voice band predetermined by the wireless terminal system RT, and transmits the dial pulses to the wireless line.
It is delivered to each wireless terminal T etc. that shares the RL. The wireless terminal T identifies that it has been selected by the received identification number 2, and sends back a terminal response signal in a predetermined voice band frequency to the signal conversion device TR via the wireless line RL. The signal conversion device TR that has received the terminal response signal sends a blocking signal using a predetermined voice band frequency to the wireless line RL in order to block other wireless terminal devices. The wireless terminal T further selects the called wireless terminal telephone B based on the received identification number 3 and sends a ringing signal, and at the same time sends a ringing signal in a predetermined voice band frequency to the signal conversion device TR via the wireless line RT. Send it back. The signal conversion device TR that has received the ringing signal returns a ringing tone to the calling extension telephone A. When the calling radio terminal telephone B answers, the radio terminal T sends a response signal using a frequency within a predetermined voice band to the signal conversion device TR via the radio line RL. The signal conversion device TR that has received the response signal stops the ringing tone that is sent back to the calling extension telephone A. Through the above steps, a communication path is established between the extension telephone A and the wireless terminal telephone B, and a telephone conversation becomes possible. When the call ends and the wireless terminal telephone B is restored, the wireless terminal T returns a restoration signal using a frequency within a predetermined voice band to the signal conversion device TR via the wireless line RL. When the trunk TRK of the automatic exchange EX is restored due to the restoration of extension telephone A, the signal converter TR that has received the restoration signal sends a blockage release signal using a frequency within the predetermined voice band to the wireless line.
Send to RL to release the blocked wireless terminal. On the other hand, when the command desk DB sets a predetermined telephone key for command communication, the operational status of the telephone key is determined by the central processing unit CC.
and is transmitted to the signal conversion device TR via the radio terminal control device D as a predetermined command signal. The signal converter TR converts the received command signal into a predetermined voice band frequency signal and transmits it to the wireless line RL.
to call the wireless terminal telephone that is the target of the command. When the responses of all the command receiving wireless terminal telephones are confirmed, the required command call is transmitted from the command desk DB, and then the signal converter A predetermined response confirmation signal is transmitted to the TR. signal converter
The TR converts the received response confirmation signal into a predetermined voice band frequency signal and delivers it to the receiving wireless terminal telephone via the wireless line RL. When each command receiving wireless terminal telephone that has received the response confirmation signal notifies that the command call has been confirmed, the command call from the command desk DB ends.

As is clear from the above explanation, in the conventional wireless terminal connection control system, the identification digit 2 of the wireless terminal T dialed by the extension telephone A and the identification digit 3 of the wireless terminal telephone B dialed by the signal converter TR
is counted, converted into a predetermined voice band frequency signal, and sent to the wireless line RL, and also sent to the command desk DB.
Various signals transmitted from the radio terminal control device D by operating the telephone key are identified by the signal conversion device TR, converted into a predetermined voice band frequency signal, and sent to the radio line RL. As a result, the configuration of the signal converter TR becomes complicated, large in size, and expensive. Furthermore, since the connection control signal based on the voice band frequency transmitted via the wireless line RL differs depending on the type of wireless terminal T, it is necessary to provide a signal converter TR corresponding to the type of wireless terminal T, and the wireless terminal system There is a risk that the economic efficiency of RT will be impaired.

An object of the present invention is to eliminate the drawbacks of the conventional wireless terminal connection control system as described above, and to provide a wireless terminal that can call a wireless terminal telephone for individual calls and command calls without using a large and expensive signal conversion device. The purpose is to realize a connection control method.

The purpose of this invention is to connect wireless terminal telephones via trunks, carrier devices, radio lines, and wireless terminals to a network of telephone exchanges that perform exchange connections between telephones under the control of a central processing unit.
In addition, an oscillator and a tone trunk are added to the network, and the oscillator generates a signal frequency within the voice band for connection control signals such as identification signals, blocking signals, and unblocking signals used for connecting the telephone and the wireless terminal telephone. is oscillated under the control of the central processing unit, and the signal tone trunk sends the signal frequency within the voice band from the oscillator to the wireless terminal via the trunk under the control of the central processing unit, and receives a terminal response signal and a ringing signal from the wireless terminal. , has the function of receiving and identifying voice band signals such as response signals and transmitting them to the central processing unit, and when the telephone transmits an identification signal for connection with a wireless terminal telephone, the central processing unit controls the telephone. A route in the network between the wireless terminal and the trunk is reserved, the trunk and the signal tone trunk are connected to the network, and the signal tone trunk receives and identifies a response signal from the wireless terminal telephone and transmits it to the central processing unit. This is achieved by a wireless terminal connection control method characterized in that the processing device sets reserved routes within the network and releases other routes.

An embodiment of the present invention will be described below with reference to FIG. FIG. 2 is a diagram showing a wireless terminal connection control method according to an embodiment of the present invention. Note that the same reference numerals indicate the same objects throughout the figures. The difference between Figure 2 and Figure 1 is that from the wireless terminal system RT to the signal converter TR
is removed, and instead the automatic exchange EX is provided with a tone trunk TNT and an oscillator OSC. The connection control signal communicated with the wireless terminal T etc. via the wireless line RL adopts the same voice band in-frequency signal format as shown in FIG. The other numbers are also the same as in Figure 1. Now, in order for extension telephone A to call wireless terminal telephone B, the identification numbers 9, 2
and 3 in sequence, the automatic exchange EX
The central processing unit CC receives and analyzes the identification numbers 9, 2, and 3 using a known method, captures the trunk TRK connected to the called radio terminal system RT, and connects the trunk TRK with the calling extension telephone A. At the same time as reserving the route L1 in the network NW that connects the
A route L2 within the network NW is set to connect the signal tone trunk TNT captured at the same time and the trunk TRK. Next, the central processing unit CC reads the paging signal method recorded in advance in an area provided corresponding to the wireless terminal telephone B in the main memory device MM, and selects a predetermined voice band frequency according to the paging signal method. After giving an instruction signal to the oscillator OSC to generate it, it connects with the signal tone trunk TNT. The predetermined voice band frequency signal generated by the oscillator OSC is transmitted to the signal tone trunk TNT, network
It is delivered to the wireless terminal T, etc. via the route L2 in the NW, the trunk TRK, and the wireless line RL. When the wireless terminal T returns a terminal response signal using a predetermined voice band frequency to the wireless line RL in the same process as described above, the signal tone trunk TNT transmits the terminal response via the trunk TRK and the path L2 in the network NW. It receives and identifies the signal and transmits the fact to the central processing unit CC. As a result, the central processing unit CC again refers to the area in the main memory MM and gives an instruction signal to the oscillator OSC to generate a predetermined frequency within the audio band corresponding to the occlusion signal, thereby creating a signal tone trunk.
Connect with TNT. The blocking signal based on the voice band frequency is sent to the radio line RL through the same route as the calling signal. Furthermore, when the wireless terminal selects the called wireless terminal telephone B and sends a ringing signal, and at the same time returns a ringing signal using a frequency within a predetermined voice band to the wireless line RL, the signal tone trunk TNT receives and identifies the ringing signal. and communicates this to the central processing unit CC. As a result, the central processing unit CC connects the calling extension telephone A and the ring trunk RBT to the network NW.
A connection is made via route L3 within the network, and the ringing tone is returned to the calling extension telephone A. Wireless terminal phone B responds,
When the wireless terminal T sends back a response signal using a predetermined voice band frequency, the signal tone trunk TNT receives and identifies the response signal and transmits the fact to the central processing unit CC. As a result, the central processing unit CC releases routes L2 and L3 within the network NW, sets the reserved route L1, and connects the calling extension telephone A to the trunk TRK. As a result of the above, extension telephone A
A call path is set up between and wireless terminal telephone B,
A call is made. When extension telephone A is restored after the end of the call, the central processing unit CC detects the restoration from trunk TRK, releases route L1 in network NW, sets route L2, and again connects trunk TRK and signal tone trunk TNT. Connecting. Next, the central processing unit CC refers to the area in the main memory MM and gives an instruction signal to the oscillator OSC to generate a predetermined frequency within the audio band corresponding to the deblocking signal, and connects it to the signal tone trunk TNT. do. The blockage release signal is sent to the wireless line RL via the same route as the blockage signal.
is sent to release the blocked wireless terminal. Furthermore, when the command board DB makes a command call, the central processing unit CC that has identified the operating state of the command key transmits the command to the trunk TRK connected to the command target wireless terminal system RT.
Then, the signal tone trunk TNT is captured and a route L2 in the network NW is set to connect the trunk TRK and the signal tone trunk TNT, and at the same time, a route L4 connecting the trunk TRK and the seat trunk POS for the command desk DB is reserved. Next, the central processing unit CC
The audio band frequency corresponding to the command signal recorded in advance in a predetermined area in the main memory device MM is read out, and an instruction signal is given to the oscillator OSC to generate a command signal based on the audio band frequency, and the signal tone trunk TNT Connect with. Thus, the command signal generated by the oscillator OSC at a predetermined voice band frequency is sent to the radio line RL via the above-mentioned path. When all the receiving wireless terminal telephones respond, the central processing unit CC releases the route L2 in the network NW and sets the reserved route L4.
The required command call is transmitted from the DB. After the command call ends, when the command desk DB performs a predetermined response confirmation operation, the central processing unit CC identifies the operation, releases route L4 in the network NW, sets route L2, and also releases the command to the oscillator OSC. connects to the tone trunk TNT by providing an instruction signal to generate a predetermined voice band frequency corresponding to the response confirmation signal. Thus, the response confirmation signal generated by the oscillator OSC and having a frequency within the predetermined voice band is sent to the radio line RL via the above-mentioned path. When each receiving wireless terminal telephone that has received the response confirmation signal notifies that the command call has been confirmed, the command call from the command desk DB is terminated.

As is clear from the above description, according to this embodiment, the central processing unit CC of the automatic exchange EX handles the connection control signal communicated with the wireless terminal T etc. via the wireless line RL as part of the call processing. The signal is sent and received by the tone trunk TNT and the oscillator OSC, which controls the signal as follows.

Note that FIG. 2 is only one embodiment of the present invention; for example, the signal tone trunk TNT is
It is not limited to those connected to the trunk TRK via NW, and as shown in Figure 3, the trunk
Direct connection to TRK is also considered, but the effects of the present invention do not change in such a case. Also automatic exchange machine
The wireless terminal system RT accommodated in the EX is not limited to one system, and it is also possible to accommodate multiple systems, but the effects of the present invention do not change even in such a case.

As described above, according to the present invention, in an automatic exchange that connects a wireless terminal system, there is no need to provide a large and expensive signal conversion device in the wireless terminal system in order to exchange connection control signals with the wireless terminal. Moreover, the central processing unit can perform flexible connection control, making it possible to provide a variety of services to the wireless terminal system.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a conventional wireless terminal connection control method, FIG. 2 is a diagram showing a wireless terminal connection control method according to an embodiment of the present invention, and FIG. 3 is a diagram showing a wireless terminal connection control method according to another embodiment of the present invention. It is a diagram showing a terminal connection control method. In the diagram, EX is an automatic exchange, RT is a wireless terminal system, A is an extension telephone, NW is a network, and L
1 to L4 are routes, TRK is trunk, RBT is ringer trunk, TNT is signal tone trunk, OSC is oscillator, DB is command desk, POS is seat trunk, CC
is the central processing unit, MM is the main memory, TR is the signal converter, C is the carrier, R1 and R2 are the radio equipment, RL is the radio line, T is the radio terminal, B and
B′ indicates a wireless terminal telephone.

Claims (1)

[Claims] 1 Wireless terminal telephones are connected via trunks, carrier devices, radio lines, and wireless terminals to the network of telephone exchanges that perform exchange connections between telephones under the control of a central processing unit, and the network also includes oscillators and signal tones. A trunk is added, and an oscillator generates an in-voice band signal frequency for connection control signals such as identification signals, blocking signals, and unblocking signals used for connection between the telephone and the wireless terminal telephone under the control of the central processing unit. The signal tone trunk transmits the voice band signal frequency from the oscillator to the wireless terminal via the trunk under the control of the central processing unit, and receives voice band signals such as terminal response signals, ringing signals, response signals, etc. from the wireless terminal. When a telephone transmits an identification signal for connection with a wireless terminal telephone, the central processing unit controls the communication route between the telephone and the trunk. is reserved and the trunk signal tone trunk is connected to the network, the signal tone trunk receives and identifies a response signal from the wireless terminal telephone;
A wireless terminal connection control method characterized in that when the information is transmitted to a central processing unit, the central processing unit sets a reserved route within a network and releases other routes.