Abstract: The present invention relates to a key telephone apparatus. In accordance with the present invention, a port for connecting terminal devices comprises two pairs having four wires, one pair having two wires of which is connected to a digital terminal device and the other pair having two wires of which is simultaneously connected to an analog terminal device, and there is provided switching control means for automatically selecting either of an interface circuit for analog terminal device and an interface circuit for digital terminal device connected to this port in accordance with the state of use of terminal devices. Therefore, it is possible to connect a one-pair two-wire analog terminal device and a one-pair two-wire digital terminal device together to one port and select either the interface circuit for analog terminal device or the interface circuit for digital terminal device according to the state of use of terminal devices under surveillance of the switching control means.

Abstract: A telephone system including a switching circuit (3) connected to a plurality of extension telephone sets (1-1 to 1-n, 1-p) a plurality of office lines (4-1 to 4-m) for selectively connecting the respective extension telephone sets and the respective office lines, a control unit (6) for connecting an extension telephone set and an office line through the switching circuit (3), a main memory (8) for registering the extension telephone sets diverted into respective terminating call dedicated telephone sets. When a key provided at an extension telephone set is pressed in a predetermined process to input a data for diverting the extension telephone set into a terminating call dedicated telephone set, the control unit (6) registers the extension telephone set into main memory (8).

Abstract: A communication console station links a plurality of communication resources (101, 103, and 105) for use by an operator. Incoming calls are placed in an incoming-call queue (207), calls on hold are placed in a holding queue (209), and all available communication resources are placed in a resource queue (211) The operator presses a single button (303, 305, or 307) to obtain the top resource from the associated queue (207, 209, or 211), which lists resources according to a predetermined priority.

Abstract: In a telephone system 1 connectable to both integrated service digital network (ISDN) lines 3a and 3b and a public subscriber telephone network (PSTN) line 7 and having a plurality of extension telephone sets 11a to 11d, the speech sound volume through the ISDN lines 3a and 3b is so adjusted as to become equal to that through the PSTN line 7, by changing the loss rate (i.e. gain) of digital pads 55 and 47 provided in ISDN interface units 5a and 5b. That is, a level confirmation tone is generated in the system 1; this tone is transmitted to a first extension telephone set 11a via only the ISDN on one hand and to a second extension telephone set 11b via both the ISDN and PSTN in series on the other hand; and the loss rate (i.e. gain) of the digital pads 55 and 47 are changed or adjusted so that the sound of the level confirmation tone can be heard at the same volume level by both the telephone sets 11a and 11b.

Abstract: There is provided a key telephone system which can use data registered in a memory card. The system comprises: a main apparatus which has a memory and operates in accordance with the data stored in the memory; and an extension telephone having a receiving circuit to receive data from a memory card, wherein the main apparatus stores the data which was received by the extension telephone from the memory card into the memory. With this system, data such as names, denominations, telephone numbers, and the like of the partners can be registered into a portable device such as a memory card by the keyboard of the extension telephone or by the keyboard of the portable device at a remote location at an arbitrary time.

Abstract: An apparatus for interconnecting a cellular telephone transceiver and a plurality of peripheral devices, such as handsets or speakerphones, is disclosed. The apparatus provides a bus-type interconnection in which multiple peripheral devices may connect with a single transceiver, and the flow of information from the peripheral devices to the transceiver is regulated in accordance with a protocol.

Abstract: Apparatus is disclosed for use in a key set interface to overcome the incompatibility between key sets and tip and ring devices. The interface apparatus rejects ringing voltage and tip and ring loop current intended to be supplied on a first pair of conductors, the TR-pair. The interface further includes apparatus adapted for bi-directional communication of supervisory and control signals. In a preferred embodiment of the invention, a second pair of conductors, the service pair, transports bi-directional supervisory and control signals as well as operating power supplied by a key system controller for non-TR devices. Additionally, a transceiver adapted for sending and receiving voiceband information over the first pair of conductors is incorporated into the interface. An advantage of this key set interface is that operation of a key telephone set does not interfere with the operation of a tip and ring device bridged onto the first conductor pair.

Abstract: A key telephone system, having ports for connection to telephone lines of a telephone exchange and ports for connection of terminal apparatus including key telephone sets, is provided with the ability to distinguish if an intended call or feature access involves more than the key telephone system. If so, a signalling protocol of the telephone exchange is emulated on behalf of the terminal apparatus and transmitted via one of the telephone lines whereby the progress of the call or feature access continues, as if a user of the terminal apparatus had initiated the signalling protocol of the telephone exchange.

Abstract: In a key telephone system connectable to both ISDN and PSTN, for the purpose of compensation of a difference in speech signal level between ISDN and PSTN, digital pads are incorporated in an ISDN interface unit mounted on a key service unit of this system. In the digital pads, original PCM-code speech signals received/transmitted from/to the ISDN line are converted into PCM-code speech signal with a compensated speech signal level obtained by adding a selected gain to the original speech signal level. Since the difference in the speech signal level between ISDN and PSTN differs according to the conditions, an appropriate gain is selected from a plurality of previously prepared gains. That is, the relationship between telephone numbers and information signals indicative of the selected gain is registered in the key service unit.

Abstract: An apparatus for transferring digital data between time-domain multiplexed communication links of a telephone system which forms part of a computer network. A time-domain multiplexed communication link interface unit for transferring digital data between a first channel on a first time-domain multiplexed communication link and a second channel on a second time-domain multiplexed communication link of a multipoint communication network is disclosed. The multipoint communication network includes a plurality of network units with at least two of the network units comprising said time-domain multiplexed communication link interface units. The network units are coupled to telephone system communication links. The network units transmit and receive digital data in a frame mode in which the data is organized into frames on the communication links.

Abstract: Apparatus is disclosed for incorporation into a key telephone system control unit, in at least one station port, for operating an at least one key type set and an at least one tip and ring device simultaneously bridged onto the same station port without the use of any special service circuits or adaptors. The ability to signal alerting indepenedntly via ringing signal on a TR-pair, via messages indicating alerting transmitted on a service pair for a key set or via both techniques simultaneously is also disclosed. Further, the alerting ability disclosed in combination with control by a key system controller of the access of a key set to voiceband communications over the TR-pair allows for incorporation of additional features into a key telephone system.

Abstract: There is disclosed a paged-mapped multi-line telephone communication system where a plurality of line selection keys can be paged to a central control module for an easier and more convenient operation. The operator has a view of all available lines and their status on various modules that are connected to the control module. The operator can select a line through a simplified pagination scheme. A set of lines represented on the auxiliary modules can be transferred to the control module where the operator selects the desired line by pressing the key corresponding to the line which was represented in the page transferred to the control module. To make an outgoing call, or to retrieve a call from another station from hold, the user would first depress the page key on the auxiliary module corresponding to the page or grouping in which the line representation resides.

Abstract: There is disclosed a resetting circuit of a key telephone system (KTS) capable of preventing data error caused by unstable power supply and instantaneous power-off of a key system unit (KSU), by adjusting a DC voltage of the key telehpone system, said DC voltage is applied to a reset terminal of a microprocessor in the key telephone system. The invention includes a power supply for supplying power to the KSU and KTS, a microprocessor for controlling the overall operation of the KTS, a first detecting means for detecting the voltage change of a first voltage Vcc1, and a second detecting means for detecting the voltage change of a second voltage Vcc2.

Abstract: A telephone with an inter communicating facility is disclosed. The telephone has: a condition storage unit for storing operation condition data; an operation process unit for, when the operation of a hold key is detected, making the condition storage means to store the operation condition data indicative that the telephone holds a telephone line; and a condition control unit for, when the condition storage unit stores the data indicative that the telephone line is held, making a holding unit to hold the telephone line. When the operation of an extension call key is detected, the operation process unit makes the operation condition data indicative that the telephone is calling another telephone connected through an extension line to be stored in the condition storage unit, and makes a command transmission unit to transmit an extension call signal through the extension line.

Abstract: The invention relates to telephones that have a base and two handsets or one handset and a base acting as a second handset and which are adapted to be connected to two or more telephone lines. Unlike known telephones designed to be connected to a set number of lines and to no other, the telephone according to the invention comprises an adapter that enables it to be connected equally well to a single line as to two lines or more, depending on the maximum number of lines for which it has been designed, and to provide in each case the same scope for communication between parties as a known telephone connected to the same number of lines. The adapter preferably includes change-over switches that can be operated by acting on a control device that is accessible from outside the telephone, but it may also include change-over switches or wire connections located inside the telephone.

Abstract: A modem coupler making it possible for a modem to access an analog signal telephone communication system directly from a multi-line key telephone set, the modem interfacing the system with a digital computer terminal or any other terminal that processes digital data. The modem coupler is self-sufficient whereby its interposition between the modem, the telephone set and the communication system entails no additional wiring or modifications of the telephone set, the modem, or the system.

Abstract: There is disclosed a multi-line telephone communications system where the need for the hundreds of conductors that are necessary to connect each station to the control and switching equipment is eliminated. This is achieved by replacing the status indicating leads with analog signals impressed upon the voice leads. A specific signal level is assigned to each of the ring, busy, idle and hold functions so that the voice leads carry both the audio signal and status information signal for each line selectable at the telephone station. In response to activation of the telephone keys by the user a cross point switch establishes a voice signal connection between a selected voice line and a talk path associated with the selecting telephone station. A status signal representative of the status of at least the connected voice line and distinct from voice signals is impressed upon the voice line. This status signal is detected and processed for activating the status indicators at each telephone station.

Abstract: There is provided a key telephone system for transmitting and receiving a dial number by a peculiar control signal between a main unit and an extension telephone. The system comprises: an extension telephone; a main unit; an analyzing unit for analyzing an audio signal; and a calling unit for calling in accordance with the result by the analysis of the analyzing means. The calling unit generates a dial pulse. When a calling request from the extension telephone is detected, the main unit connects the extension telephone and the analyzing unit. Information generated by an electronic apparatus via which the dial number can be independently registered from an extension telephone of the KTs is analyzed and calling or displaying can be executed.

Abstract: There is disclosed a data interfacing method in a key-phone system and a subset key-phone system capable of speedily processing an event generated from a key-phone system by use of two data interfacing sections between the key-phone system and subset key-phone. The invention to increase the data interfacing speed includes: a first step for reading a state data of data received from a data receiver 43 and checking whether said received data is effective; a second step for reading the data from said data receiver 43 when the received data in said first step is effective, thereafter checking whether it is null data.

Abstract: A break-in method and a circuit in a key system for switching a key system to a conference-call state by use of a conference-call circuit is disclosed in the invention. In the break-in method, when an attendant perceives a telephone subscriber on the line, the attendant breaks in forcefully upon the subscriber's call currently on the line, changing the present call to a conference call. Thereafter, if the attendant hangs on the phone, the subscriber having waited for being switched breaks into the conference-call replacing the attendant.

Abstract: A system is provided to automatically reconfigure resource modules (302) to perform selected functions. Incoming telephone calls are allocated by a resource manager (304) to appropriate resource modules (302). Based upon logic programmed into a computer (309) coupled to the resource manager (304), the system can predict how many resource modules (302) providing each function are required to handle the incoming calls. The computer (309) directs the resource manager (304) to reconfigure certain of the resource modules (302) to provide the necessary functions. This reconfiguration can occur dynamically during any particular call.

Abstract: An integrated voice and data telephone system is disclosed. The invention provides a telephone-based integrated voice, data and application communication system for small businesses. The system includes a plurality of telephone station sets which provide a user with a softkey selectible menu-driven interactive display to enable any one of a plurality of voice and/or data functions.

Abstract: A key telephone system including a key service unit, a plurality of key telephone station sets which are connected via speech lines for transmission of speech signals and via data lines for transmission of data, and a device provided at the key service unit for sending a predetermined discrimination signal to a selected key telephone station set via an associated speech line, whereby the key service unit sends key telephone station set information to the plurality of key telephone station set via the data lines, and each of the plurality of key telephone station sets derives its own key telephone station set information from the key telephone station set information sent via the data lines, on the basis of the discrimination signal sent via the speech line.

Abstract: A call appearance reservation arrangement where any number of the call appearances of a directory number are reservable, and where a reservation type is defined for the directory number such that calls to and from the reserved call appearances are processed in accordance with one of a number of possible reservation types, such types for example including: (1) origination only, (2) termination only, and (3) origination and priority termination only.

Abstract: A key telephone management controller system enabling telephone customers to control and implement changes to customer key telephone systems served by a telephone switching system. Apparatus and a method interactive with telephone customers records customer-selected key telephone button and line features and controls the telephone switching system to assign the customer-selected button and line features to telephone sets of the customer key telephone system.

Abstract: A key telephone system comprised of a key service unit connected to a plurality of local sets via four-wire conductors for providing full duplex signal communication between the key service unit and sets. Signals are carried by a first pair of each of the conductors for unidirectional transmission of signals from each set to the key service unit, and the remaining pair of conductors carries signals transmitted by the key service unit for reception by one or more of the sets. Four-to-two wire signal conversion and line impedance balancing is effected by one or more trunk circuits of the key service unit in the event one or more of the local sets are connected via the key service unit for communication between the sets and the outside telephone lines.

Abstract: A method and apparatus for processing calls to a directory number, shared by a multiple number of terminals, in which a switching system selects a preferred terminal for serving the call based on call answering activity. The switching system establishes a connection to the preferred terminal. This system connection is for use in answering the call at the preferred terminal. Although the system connection is established to the preferred terminal, all the terminals sharing the directory number are enabled to answer the call. The arrangement dynamically selects the preferred terminal rather than establishing an initial system connection to only a statically defined terminal.

Abstract: A call coverage arrangement in which coverage personnel are informed of the switch-hook status of covered terminals by way of a single two-part indicator on the coverage terminal. The two-part indicator indicates switch-hook status for any one of a number of covered terminals. The first part of the indicator identifies the covered terminal and the second part defines the switch-hook status of the identified terminal. The arrangement is flexible in providing coverage for additional terminals and in providing coverage via forwarding from any termianl, since there is no need to assign and dedicate status indicators to particular terminals.

Abstract: A feature telephone integration device is disclosed. The device is intended for use in a PBX-type environment for use in a telephone system. The present invention uses communications with a feature phone as the source of information for an applications processor.

Abstract: A data transmission system between a main CPU and a plurality of sub-CPU's includes a data bus connected between them, a CPU select line for transmitting a CPU select signal from the main CPU to the sub-CPU's, a latch circuit for providing a wait signal to the main CPU upon write or read in the main CPU with respect to the sub-CPU's and a wait clear line connected between the respective CPU's to provide to the latch circuit a wait clear signal upon completion of input and output of the sub-CPU to release the waited state of the main CPU, the transmission system being thereby simplified to reduce installation space and wiring labor.

Abstract: A key telephone system includes a main unit, a DSS interface, and a detector. The main unit includes a speech path switch, a plurality of call processing interfaces, an operating data memory, operation mode setting switches, and a controller for controlling the speech path switch by referring to the operating data memory when data transmission is periodically performed between the plurality of key telephone sets through the call processing interface in the call processing mode, and for updating contents of the operating data memory according to operating data externally input in the data setting mode. The DSS interface connects at least one DSS console. The detector detects that first normal data received, after a periodic data transmission with the DSS console through the DSS interface is an abnormal transmission for a predetermined period of time, is data unique to the key telephone set.

Abstract: A key telephone system includes a temporary registration memory for temporarily storing operating data and a final registration timing data memory for storing final registration timing data, including a timing condition for transferring contents of the temporary registration memory to the operating data memory. Operating data input by a user and the final registration timing data are written into the temporary registration memory and the final registration timing data memory, respectively, from a data input unit connected to the main unit during a data setting mode. The system discriminates establishment of the timing condition designated in accordance with the final registration timing data stored in the final registration timing data memory, whereupon the operating data stored in the temporary registration memory is transferred to the operating data memory.

Abstract: A multiline access module for connection of a number of telephone lines to a station set. The station set is controlled by a microprocessor and communicates with the access module through a communications channel to select one telephone line for connection to the station and to read the line status, ringing, on-hook, seized, no connection, or hold, for each line; the microprocessor controlling audible and visual indicators accordingly. The access module monitors voltage levels on each line to determine the line status. Each access module includes apparatus for connection to first and second groups of telephone lines and when two modules are interconnected by an appropriately polarized cable each will activate a different connection apparatus, allowing two modules to be connected in parallel for greater line capacity.

Abstract: An arrangement is disclosed for delivering DC power (battery), voice, and ta signals from a telephone controller to a telephone station over first and second wire-pairs. Minimum interference between these signals is achieved when the first wire-pair is used as the voice signal path and the second wire-pair is used as the data signal path. DC power is fed out of the controller and into the center tap of an audio transformer interconnected with the first wire-pair. Ground current is returned to the controller through a balanced resistive circuit interconnected with the second wire-pair.

Abstract: An automatic route selection capability for a communication system is described which enables the system to utilize digits of a called party number to select in a predetermined manner a predefined group of line pools and a line therein over which the call is to be placed. Once the predefined group of line pools is selected, a priority scheme enables the system to sequentially search each line pool for an available line over which the call can be placed. The system dials the called party using route character digits which prefix or optionally replace one or more of the user-dialed digits.

Abstract: A system for transmissing data by a pulse signal through a pair of lines connected between a main unit and a key telephone set is disclosed. The main unit includes a transmitter for sending, prior to transmission of pulse train data, a start signal of a pulse train including a pulse of an n-bit (where n is an integer) specific logic value and a pulse of an (n+1)-bit logic value opposite to the specific logic value. The key telephone set includes a change detector for detecting a change in the pulse train of the start signal in a direction of the logic value opposite to the specific logic value, a logic value detector for detecting a logic value of an (n+1)th bit pulse from a detection timing of the change detector, a discriminator for discriminating on the basis of the logic value of the (n+1)th bit pulse whether a line connection for the key telephone set is normal, and a reader for reading data following the start signal according to a logic determined by a discrimination result.

Abstract: A distributed control switching system where calls, to and from a directory number that is shared by a key-system group of terminals, are processed cooperatiavely by multiple, distributed control units but in response to busy/idle data for the shared directory number stored advantageously by only a lead one of the control units. In addition to processing a call, for example to complete a connection to or from one of the terminals of the group, the multiple control units also cooperate as the call progresses to inform each of the group terminals of the call status as though the terminals were connected in parallel to a central office line as in an electromechanical key system.

Abstract: A key telephone system comprising a key service unit and key telephone sets is configured by the present invention so that system data are registered in an IC card and the system data so registered are fed to the key service unit by the insertion of the IC card in the key service unit.

Abstract: A key telephone system provided with a power supply for supplying power to a specified key telephone set at all times and a controlled power supply capable of turning ON and OFF the power supply to controlled key telephone sets other than the specified key telephone set. The controlled power supply has provision for being automatically turned ON and OFF in accordance with a predetermined schedule or turned ON and OFF under control of the specified set. The power supply is turned ON upon receiving an incoming call or turned OFF upon ON - hooking of the key telephone set after a talking operation with a calling party or automatically turned ON and OFF in response to a specified dial signal incoming after automatically answering the incoming call. The key telephone system can have provision for individually controlling the power supply to each controlled key telephone set.

Abstract: A key telephone system comprising a key service unit and a plurality of key telephone sets is configured by this invention so as to permit use of IC cards which are adapted to admit user data for registration therein, to be inserted in any of the key telephone sets for the user data to be read out of the IC card, and to enable the user to utilize the key telephone set.

Abstract: A key telephone system includes a plurality of key telephone sets having speakers and tone signal generators and communicating with each other through extension links. The key telephone system further includes a first memory, a second memory, a main CPU, a sub CPU, an MF signal generator, and a speech path switch. The first memory stores availability of the extension links. The main CPU discriminates whether all extension links are available according to the storage contents of the first memory in an extension call mode. The MF signal generator signals to a calling key telephone set that all the extension links are busy when the main CPU discriminates that all the extension links are busy. A second memory stores information on each calling and called key telephone set if the extension call is in a state where the MF signal generator signals that all the extension links are busy.

Abstract: There is disclosed a data transmitting and receiving circuit extremely advantageous when applied to a key telephone system. The data transmitting circuit comprises a voltage dividing circuit for dividing a power supply voltage to apply the divided voltage to one end of a primary winding of a transformer, and a driver circuit comprising a pair of transistors connected in series between the power supply and a common potential terminal, the node of the transistors being connected to the other end of the primary winding of the transformer. When data signal is transmitted, the data transmitting circuit is operative to complementarily turn and off the pair of transistors in accordance with the data signal. In contrast, when data is not transmitted, the data transmitting circuit is operative to cut off both the transistors. Thus, the data transmitting circuit can eliminate the possibility that a DC voltage on which a data signal to be transmitted is superimposed undesirably changes.

Abstract: In a communication system, a modular expansion subsystem comprised of a plurality of general purpose slots disposed in the system cabinet, for receiving one or more co-operatively shaped interface modules connected to associated peripheral units, such as RS232C computer ports, answering machine interface circuits, local area network interface circuits, modems, etc. Additional slots are disposed in the cabinet for receiving one or more co-operatively shaped line or trunk interface modules connected to associated subscriber sets and outside telephone lines. A further slot is disposed in the cabinet for receiving a co-operatively shaped memory module in which an operating system program is stored. The various modules communicate with a central microprocessor of the communication system, which executes the stored operating system program, for identifying the various types of modules and the particular slots in which they are disposed.

Abstract: Disclosed is a system for transmitting data by a data pulse train obtained by a combination of "0" or "1" bit pulse signals through a pair of lines connected beween a main unit and a key telephone set. The system includes a counter for sampling the pulse train and counting "0" or "1" bit pulse signals; a comparator for comparing a count of the counter with a reference value; and a correcting section for adding "0" or "1" correction pulses so as to set the count to be the reference value when the count is different from the reference value.

Abstract: A communication system controller is operable under program calls from two memories which are independently changeable. A first memory includes a group of hardware-dependent programs and a second memory includes a group of hardware-independent programs. Calls are initiated by programs resident on the first memory to an interface program resident on the second memory at an address known to programs of the first memory. This interface program call includes an argument indentifyng the function program to be called. The interface program uses the argument to determine the location of the function program from a program table and then transfers control to the function program.

Abstract: A bidirectional communication system having separate unidirectional information signalling for connection to one or more signal ports, comprised of a first switching matrix for effecting bidirectional communication between one or more of the signal ports and a second separate switching matrix for establishing unidirectional communication from one or more information signal sources to a predetermined one or more of the signal ports. Preferably, the communication system is a telephone system and the signal ports are local subscriber sets and outside telephone lines. The information signal sources can be, for instance, supervisory tone generating circuits such as DTMF generators, RING BACK, DIAL TONE or BUSY/ERROR signal generators. Alternatively, the signal sources may be music on hold circuits or circuits for generating out of voice band data signals.

Abstract: A telephone call routing system for routing incoming telephone calls assigns each such incoming call to a selected one or more of a plurality of agent display modules. The agent display module has a visual output indicating which of a plurality of telephone lines carries the incoming call assigned to it. Any one of a plurality of agents' telephones associated with corresponding agents' modules may be connected to the line carrying the incoming call. Each telephone has a device for generating and transmitting a coded signal along the telephone line which is answered by that particular telephone. The signal is uniquely coded to identify the agent's module which is associated with the telephone which answers the incoming call. A signal detection device detects the transmitted coded signal and decodes the signal to determine which telephone associated with an agent's module answered the incoming call.

Abstract: Connection of a plurality of peripheral apparatus (APT) and a telephone station (PT) is achieved by a bus (BUS) which transmits analog signals and digital signals which are common to all of the apparatuses. Thus, each apparatus is supplied at each instant with information indicating the actual use of the telephone line to which the telephone station is connected.

Abstract: An apparatus for indicating to a central service unit of a telephone system having a central service unit coupled to a plurality of station sets whether a particular station set comprises a speakerphone and the type of speakerphone from among two types of speakerphone, is disclosed. The station set includes a microprocessor controller having an input line coupled to a selected one of a low or high logic level. The input line is connected to an electronic switch which receives interrogation signals from the central service unit. Depending on the logic level to which the input line is coupled and the state of the switch, the central service unit can determine whether the station set comprises a speakerphone and the type of speakerphone.

Abstract: A tone source is located at each telephone set of a private branch exchange (PBX) or a key telephone system. The tone source provides call progress tones and warble ring tone, as well as a feedback tone in response to the depression of telephone set keypad buttons by the user. The signaling to the central system unit is transmitted via a digital link.