Kabushiki Kaisha Toshiba

Toshiba Corporation

Kabushiki Kaisha Allco

Takashi Aoki

Yoshikazu Sano

Hiroshi Mano

Yuichi Yamazaki

Hideyasu Mori

Norimitsu Ikehata

Hiroaki Hayashi

If a call is originated from a DKT, a first node being a calling party prepares a call identifying information item using a call number and a Node ID, and transmits the information item to a second node being a called party. If the first node and the second node receive a disconnect request of the call from the DKT, each of the nodes transmits an accounting information item and the call identification item to an accounting apparatus. The accounting apparatus sums up accounting information items having the same call identification item, and performs accounting processing for the summed accounting information as total accounting information of the call.

Telephone exchange apparatus, telephone exchange system, and accounting method

A writing implement comprises a tubular barrel containing an ink, a writing ball fitted in a socket formed in the tip of the barrel, and an ink stirring member sealed in the barrel so as to be movable to stir the ink so that the precipitated components of the ink are dispersed when the barrel is shaken. A helical spring is disposed within the barrel at a position near the writing tip of the barrel so that the front end thereof is in contact with the writing ball to press the ball resiliently forward and the back end thereof can be struck by the stirring member. When the barrel is shaken so that the stirring member may apply shocks to the back end of the helical spring, the helical spring vibrates slightly and the slight vibrations of the helical spring disperse the precipitated components of the ink and secure smooth ink flow.

Writing implement with stirring member

A telephone connection is established between a pushbutton telephone set and one of telephone lines through a pushbutton telephone set unit, a speech highway, and a telephone line unit. When one of line and extension keys of the pushbutton telephone set is pressed by the user during the telephone connection, a CPU in a control unit determines whether the telephone connection is being made based on the period of time that has elapsed after the pushbutton telephone set has captured the telephone line. If the telephone connection is being made as determined by the CPU, then the CPU controls a time switch circuit according to hold function data stored in a RAM to connect the telephone line unit to a hold tone generator through the speech highway, thus holding the telephone connection. Thereafter, the CPU captures a telephone line corresponding to the depressed one of the line and extension keys.

Pushbutton telephone system

In a modem pooling system for enabling selective connection of a plurality of data terminal units 5.sub.1 to 5.sub.n to a modem 9, each of the data terminal units 5.sub.1 to 5.sub.n is detected as to whether active or inactive; one data terminal (e.g. 5.sub.1) is selected as a responsive terminal unit from among the data terminal units determined to be active in accordance with a predetermined priority order; and the modem 9 is connected to the selected responsive terminal unit (e.g. 5.sub.1), prior to an incoming call response of the modem 9.

Modem pooling system

In a key telephone system in which a plurality of data terminals 371 . . . 37n such as personal computers are connected to a key service unit 1 connected to a plurality of telephone lines 251 . . . 25m, a modem 43 is pooled so as to be usable in common for the plural data terminals 371 . . . 37n. In response to a called party number signal from the Telephone line (e.g. 251), the key service unit 1 selects a single data terminal among the data terminals 371 . . . 37n now being in standby status, and closes a communication channel between the selected data terminal (e g 371) and the modem 43, so that a status equivalent to that where the selected data terminal 371 and the modem 43 are directly connected to each other can be established. Thereafter, the key service unit 1 indicates a called party number signal reception to the modem 43, and the modem 43 transmits a call to the selected data terminal 371. When the selected data terminal 371 responds to the call from this modem 43, the key service unit 1 closes a communication channel between the modem 43 and the telephone line 251, so that a communication link between the selected data terminal 371 and the telephone line 251 can be established via the modem 43. During the process until this communication link can be established, since the selected data terminal 371 and the modem 43 are in the status equivalent to direct coupling, the key service unit 1 is not concerned in the communications between the selected data terminal 371 and thus modem 43, thus reducing the operational load applied to the key service unit 1.

Modem pooling system for communicating between a telephone and a

In a key telephone system in which a plurality of data terminals 37l . . . 37n such as personal computers are connected to a key service unit 1 connected to a plurality of telephone lines 25l . . . 25m, a modem 43 is pooled so as to be usable in common for the plural data terminals 37l . . . 37n. In response to a called party number signal from the telephone lines (e.g. 25l) in dial-in service, the key service unit 1 selects a single data terminal designated by an extension telephone designation signal in dial-in service from among the data terminals 37l . . . 37n, and closes a communication channel between the selected data terminal (e.g. 37l) and the modem 43, so that a status equivalent to that where the selected data terminal 37l and the modem 43 are directly connected to each other can be established. Thereafter, the key service unit 1 indicates a called party number signal reception to the modem 43, and the modem 43 transmits a call to the selected data terminal 37l. When the selected data terminal 37l responds to the call from this modem 43, the key service unit 1 closes a communication channel between the modem 43 and the telephone line 25l, so that a communication link between the selected data terminal 37l and the telephone line 25l can be established via the modem 43. During the process until this communication link can be established, since the selected data terminal 37l and the modem 43 are in the status equivalent to direct coupling, the key service unit 1 is not concerned in the communications between the selected data terminal 37l and thus modem 43, thus reducing the operational load applied to the key service unit 1.

A key telephone system is disclosed including a key service unit to which are connected a communication network such as public telephone network, a plurality of data terminal equipments such as personal computers, and interface conversion unit such as MODEM. When a call comes from external calling party into this system, the key service unit establishes a communication path between the network and the interface conversion unit so that succeeding data transmitted from the calling party supplied to the interface conversion unit. The succeeding communication data includes an extension number selected by the calling party, and the extension number is informed to the key service unit from the interface conversion unit. Then, the key service unit establish a communication path between a single data terminal equipment designated by the extension number and the interface conversion unit, so that the calling party can communicate with the designated data terminal equipment.

Arbitrary selecting of a terminal to be called in key telephone systems

In a key telephone system in which a plurality of data terminals 37l . . . 37n such as personal computers are connected to a key service unit 1 connected to a plurality of ISDNs 23l . . . 23m, a terminal adapter (TA) 41 is pooled so as to be usable in common for the plural data terminals 37l . . . 37n. In response to a setup signal from an ISDN (e.g. 23l), the key service unit 1 selects a single data terminal designated by a subaddress included in the setup signal from among the data terminals 37l . . . 37n, and closes a communication channel between the selected data terminal (e.g. 37l) and the TA 41, so that a status equivalent to that where the selected data terminal 37l and the TA 41 are directly connected to each other can be established. Thereafter, the key service unit 1 transmits a setup signal to the TA 41, and the TA 41 transmits a call to the selected data terminal 37l. When the selected data terminal 37l responds to the call from this TA 41, the key service unit 1 closes a communication channel between the TA 41 and the ISDN 25l, so that a communication link between the selected data terminal 37l and the ISDN 23l can be established via the TA 41. During the process until this communication link can be established, since the selected data terminal 37l and the TA 41 are in the status equivalent to direct coupling, the key service unit 1 is not concerned in the communications between the selected data terminal 37l and thus TA 41, thus reducing the operational load applied to the key service unit 1.

Terminal adapter pooling system for ISDN

The telephone system comprises a central or key service unit 1, data terminal units 5.sub.1 to 5.sub.n, and data set circuits of data terminal interface units 27.sub.1 to 27.sub.n for communications between the central unit 1 and the data terminal units 5.sub.1 to 5.sub.n, respectively. The central unit 1 includes a time switch 17 for executing exchange service and a control unit 19 for controlling the time switch 17. Each interface unit 27.sub.1 to 27.sub.n is connected to the time switch 17for communication of communication-data and connected to the control unit 19 for communication of control-data. Each interface unit 27.sub.1 to 27.sub.n enables and disables communication of communication-data between each data terminal 5.sub.1 to 5.sub.n and the time switch 17 in response to predetermined control commands received from each data terminal unit 5.sub.1 to 5.sub.n.

Telephone system

In a modem pooling system for enabling selective connection of a plurality of data terminal units 5.sub.1 to 5n to a modem 9 through an exchange switch 17, when the modem 9 is in standby state, the exchange switch 17 is controlled so that the modem 9 is continuously connected to a data terminal unit (e.g. 5.sub.1) selected in advance as a responsive data unit terminal from among the data terminal units.

Growing community of inventors

Akishima, Japan

Takashi Aoki