76results about "Interconnection involving common line" patented technology

The communication system includes a hybride fiber / coax distribution network. A head end provides for downstream transmission of telephony and control data in a first frequency bandwidth over the hybrid fiber / coax distribution network and reception of upstream telephony and control data in a second frequency bandwidth over the hybrid fiber / coax distribution network. The head end includes head end multicarrier modem for modulating at least downstream telephony information on a plurality of orthogonal carriers in the first frequency bandwidth and demodulating at least upstream telephony information modulated on a plurality of orthogonal carriers in the second frequency bandwidth. The head end further includes a controller operatively connected to the head end multicarrier modem for controlling transmission of the downstream telephony information and downstream control data and for controlling receipt of the upstream control data and upstream telephony information. The system further includes service units, each service unit operatively connected to the hybrid fiber / coax distribution network for upstream transmission of telephony and control data in the second frequency bandwidth and for receipt of the downstream control data and telephony in the first frequency bandwidth. Each service unit includes a service unit multicarrier modem for modulating at least the upstream telephony information on at least one carrier orthogonal at the head end terminal to another carrier in the second frequency bandwidth and for demodulating at least downstream telephony information modulated on at least a band of a plurality of orthogonal carriers in the first frequency bandwidth. Each service unit also includes a controller operatively connected to the service unit multicarrier modem for controlling the modulation of and demodulation performed by the service unit multicarrier modem. A method of monitoring communication channels, a distributed loop method for adjusting transmission characteristics to allow for transmission of data in a multi-point to point communication system, a polyphase filter technique for providing ingress protection and a scanning method for identifying frequency bands to be used for transmission by service units are also included. Also provided is a method and apparatus for performing a Fast Fourier Transform (FFT). In one embodiment, a scalable FFT system is built using a novel dual-radix butterfly core.

A hybrid coaxial cable network employing interdiction to ensure privacy in telephony communications. The video and telephony signals are secured such that telephony and interactive video signals to and from a subscriber do not appear on the network at any other undesired subscriber location.

A system and a method for selectively intercepting audio and video conversations over a wide area computer network, for monitoring, storing, and contributing to these conversations and reconstructing the associated communications session upon request.

The present invention disclosed a method for achieving that a plurality of users share the same communication terminal. The method comprises the following steps: receiving using requests of users and obtaining user information of users; comparing user information with authentication data stored to authenticate users, wherein said authentication data are information set in advance and of special users capable of ustilizing said communication terminal; refusing to provide communication service to users who can't pass the authentication. The present invention disclosed also a communication terminal for a plurality of users. By authenticating user information, legal users of communication terminal are enabled to dial and receiving phones safely, the communication information of users are prevented from leaking out, and then problems (safety, privacy etc.) existing in that a plurality of users share the same communication terminal have been resolved.

A control interface protocol governs communications in a satellite telephone system. The satellite telephone system comprises a radio antenna unit (RAU) and a plurality of desksets connected to the RAU. An interface bus connects the desksets to the RAU. The RAU and the desksets communicate with each other by packets. Each packet comprises a start of header (SOH) byte, an address number (ADDR) byte, a command (CMD) byte, an argument (ARG) and a block check character (BCC). The ADDR byte comprises a source and a destination address of the packet. All packets, except negative acknowledgment (NAK) packets from the desksets, are acknowledged by the RAU. The packets originating from the desksets are tagged with an address of the desksets. A packet to a specific deskset includes a destination address. A packet originating from the RAU to all desksets includes a first default address. A packet originating from the RAU to a deskset that does not have an address includes a second default address.

The present invention discloses a frequency hopping communication method for digital centreless communication systems, which includes procedures below: Service frequency points are divided into one or a plurality of frequency hopping sequence sets. A calling broadcasting station detects state of each service frequency point and selects a frequency hopping sequence set of higher quality. After acquisition of time slot synchronization for the calling broadcasting station and a designated service frequency point, the calling broadcasting station initiates a call request to a called broadcasting station and transfers the call request to the designated service frequency point and the time slot. After receiving the call request from the calling broadcasting station, the called broadcasting station transfers to the service frequency point and the time slot designated by the call request of the calling broadcasting station. The calling broadcasting station communicates with the called broadcasting station on the designated frequency point and the time slot. Different call frames circularly use each service frequency point in a selected frequency hopping sequence set through frequency hopping until communication is finished. The method reduces impact of selective frequency attenuation on normal communication of broadcasting stations and improves communication efficiency.

A door bell answering system for a dwelling includes an internally disposed answering device which has a housing, a control member capable of at least storing and playing an audio message, a speaker for broadcasting the audio message and a predetermined plurality of function keys manually operable from an exterior surface of the housing for operating the control member and the speaker. An externally disposed panel has a housing mounted to an exterior surface of the dwelling, a microphone disposed within the housing, a first switch for activating a door bell, a second switch for activating the answering device and the microphone and for enabling a visitor to record the audio message. The control panel and the answering device are connected by wires for transmitting the audio message therebetween.

A network of processing devices is arranged to communicate by packets having an addressing header and a data portion. Within the network, audio telephony is implemented. A signaling packet is sent from a source processing device to a central location identifying a destination processing device. A signaling packet is sent from the central processing location to the destination processing device identifying the source processing device. A packet is supplied from the central location to the sourcing processing device identifying an address for the destination processing device, whereafter packets containing digitized audio signals are transmitted over said network directly between the source processing device and the destination processing device.

The invention makes it possible to call a resident of collective housing even when the apartment number of the resident is unknown. A collective housing entrance substation is connected to residential master stations through a controller, and a name retrieval module is connected to the controller. The name retrieval module has a memory in which a name and / or apartment number of a resident is registered in advance, a button operable to display the name and / or apartment number of the resident registered in advance, a name indicator for display of the name and / or apartment number of the resident registered in advance, and a call button that is operated with display of the proper name and / or apartment number to call the residential master station of the resident.

Various implementations include systems and methods for unlocking a door to a building on behalf of a tenant of the building that addresses the shortcomings of legacy telephone entry systems and allows for more efficient and safer management of building entry requests from third parties. In some implementations, the system taps into the legacy telephone entry systems to communicate with third parties seeking entry into the building. In some implementations, the system communicates with third party computing devices (e.g., stationary or mobile devices) to process entry requests. And, in some implementations, the system communicates entry preferences (or parameters) associated with a tenant with a door lock system to allow for entry during certain time windows or under certain conditions.

Various implementations include systems and methods for unlocking a door to a building on behalf of a tenant of the building that addresses the shortcomings of legacy telephone entry systems and allows for more efficient and safer management of building entry requests from third parties. In some implementations, the system taps into the legacy telephone entry systems to communicate with third parties seeking entry into the building. In some implementations, the system communicates with third party computing devices (e.g., stationary or mobile devices) to process entry requests. And, in some implementations, the system communicates entry preferences (or parameters) associated with a tenant with a door lock system to allow for entry during certain time windows or under certain conditions.

In a dwelling unit device (A), if the call terminal at the other end of communication is an analogue transmission-type, a call processing unit (2) implements a first software; if the call terminal at the other end of communication is a packet transmission-type, the call processing unit (2) implements a second software, and thus call processing which is suited to each transmission-type can be selectively implemented.

A multiple dwelling house interphone system includes a centralized collective entrance machine for a visitor to call a dweller of any building, a dwelling unit master device provided to each dwelling unit for a dweller to respond to a call, and a centralized controller which controls communication between the centralized collective entrance machine and each dwelling unit master device. Each dwelling unit master device has an ID storage section storing its own ID. When the ID of the dwelling unit master device is inputted for calling the dweller, a centralized collective entrance machine control section of the centralized collective entrance machine first transmits an ID confirmation request signal to all the dwelling unit master devices and waits for a reply from the corresponding dwelling unit master device, and next, transmits a call signal to the dwelling unit master device that has returned a reply signal.

Disclosed are call processing methods which are performed by a network terminator located at a subscriber's premise. The network terminator is coupled to a digital network and a communication device at the subscriber's premise and can perform call waiting, caller identification, call conferencing without intervention from a telco's switching system that requires an additional charge to the subscriber for these services. In addition, the network terminator can perform a method which allows two digital communication devices coupled to one S-bus to share a communication session. In another embodiment, up to a six way conference call can be established with an analog telephone coupled to an ISDN network via the network terminator of the present invention.

The invention discloses a bus-mode command telephone, essentially comprising a transmission bus and a command telephone terminal. The transmission bus adopts field bus composed of 2-4 physical connection lines; the command telephone terminal consists of an audio input and processing module, a main control processing module, an audio power amplifier output module, a video input / output and control module, a video display module and a man-machine interface circuit. The audio input and processing module consists of an audio signal collecting circuit and a digital processing circuit that comprises a speech codec, a speech anti-noise processing circuit and a compressor circuit. The invention adopts a pair of buses as a transmission medium and the transmission has no host and is all digital, and therefore the invention overcomes disadvantages in the prior art, attaches customers at real time easily, expands network capacity, has the functions of auto exchange of customer information and audio collecting and uploading, can extend transmission and be connected with equipment arranged outside the network conveniently through heterogeneous network and effectively improves the stability and reliability of the command telephone system.

A packet switch apparatus including a plurality of connecting points, each being coupled to one of a plurality of data processing units, and apparatus for receiving a first packet including identification information of a first data processing unit via a first connecting point. The invention further includes a storage for storing correspondence between the first data processing unit and the first connecting point based on the identification information. Apparatus, responsive to reception of a second packet from a second data processing unit to be transmitted to the first data processing unit, transmits the second packet to the first data processing unit via the first connecting point based on the correspondence stored in the storage.

A nurse call system includes a nurse call slave device, a nurse call master device, a plate slave device, a bedside monitor, a corridor light, a control unit, and nurse mobile phones. The nurse call slave device is provided for each bed in a hospital room for allowing a hospitalized patient to call a nurse. The nurse call master device is provided at a nurse station for answering a call from the nurse call slave device. The plate slave device, the corridor light, or the control unit has an automatic answering unit for automatically answering a call from the nurse call slave device, and causes the automatic answering unit to automatically answer at least a part of calls from the nurse call slave device without calling the nurse call master device and the nurse mobile phones.

A nurse call system that enables a call for a nurse from anywhere in a hospital ward while a patient carries a mobile phone is provided. The nurse call system includes a plurality of patient mobile phones 10 are carried by hospitalized patients and connected to a controller 8 via a base station 12 as with nurse mobile phones 9, and each patient mobile phone 10 has a hospital room ID and a nurse call slave device ID registered therein for recognizing a bed location of the patient carrying the patient mobile phone 10, thus enabling a nurse call operation for transmitting a call signal with the hospital room ID and the slave device ID added thereto, to the nurse call master device 7 and at least one of the nurse mobile phones 9, through a predetermined operation.

The invention relates to, among others, a communication station (10) for an intercom network (11), comprising a plurality of operating elements (15a, 15b, 15c, 15d) each of which are configured in themanner of a lever (49a, 49b, 49c, 49d, 49e, 49f, 49g, 49h, 49i, 49j), wherein a lever starting from an inactive middle position (39a) is manually shiftable along a first direction (31) into a first switching position (39b) or alternatively shiftable along a second direction (32) contrary to the first into a second switching position (39c), wherein the lever is pre-tensioned towards its middle position. The special feature of the invention consists, among others, in that the lever comprises a rotatably mounted setting element (59, 59a, 59b, 59c, 59d, 59e, 59f, 59g, 59h, 59i, 59j) for changinga parameter or the lever is lapped on the setting element.

The invention discloses an in-vehicle call method, a device, a system and a vehicle. The in-vehicle call method comprises the following steps: establishing communication connection between different areas in a vehicle according to a call request, wherein the different areas at least comprise two areas; obtaining audio information from one of the areas after the communication connection is established; and transmitting the collected audio information to a playing source of at least one area in other areas in communication connection. According to the in-vehicle communication method, the communication connection is established through the communication request proposed by the information entertainment control system, and then users in different areas are enabled to perform voice communication with users in other areas, so that on one hand, the users in several mutually separated areas can communicate with each other conveniently. On the other hand, conversation can be carried out according to the conversation request of the user, and privacy of the user can be protected conveniently.

The invention relates to a CAN bus-based voice communication system, which belongs to voice communication systems. A method for the CAN bus-based voice communication system comprises the following steps that: voice data is input by a microphone and amplified by a voice amplifier, the amplified voice data is processed by A / D conversion and then is transmitted to a PIC single-chip after being compressed and packed by a voice compressing and decompressing device, and the data is transmitted to the bus through a CAN transceiver; and the voice amplifier of the system is connected with an A / D-D / A converter, the A / D-D / A converter is connected with the voice compressing and decompressing device, the voice compressing and decompressing device is connected with a controller of the PIC single-chip, the controller of the PIC single-chip is connected with the CAN transceiver, and the CAN transceiver is connected to the bus. The CAN bus-based voice communication system has the following advantages that: the CAN bus can monitor monitoring information and system information while performing voice communication, the good voice communication quality can be kept when one CAN bus is shared to performtransmission, the circuit is simple, the power consumption is low, the cost is low, and the method is a novel transmission method in the field of voice communication.

Disclosed is a communication system which comprises at least two local terminal devices and at least two filters which operate in different frequency ranges; the filters are respectively connected with the local terminal devices to extract the signals in the working frequency range of the local terminal devices among the signals needed to be received by the local terminal devices; the extracted signals are transmitted to the local terminal devices by the filters. The invention also provides a local terminal device and a signal separator. The communication system, the local terminal device and the signal separator extract the corresponding signals needed by the user terminal device or the local terminal device from the signals needed to be received by the device; the simultaneous support of different services is realized; meanwhile, the cross talk mutually generated among the different frequency range services is avoided effectively.

Methods and systems for granting access to a building are disclosed. The system includes a telephone entry system associated with the building, a processor in communication with the telephone entry system, a non-transitory computer readable medium. The non-transitory computer-readable medium includes one or more programming instructions that when executed by the processor, cause the processor to receive a request including an access code for access to the building code, determine whether the access code is valid, and transmit to the telephone entry system associated with the building a sequence of dual-tone multi-frequency (DTMF) tones to cause the telephone entry system to grant access to the building in response to determining that the access code is valid.