A call center associated with an intelligent network has no service-specific executable application software running on its operator positions. Instead, each computer stores a set of templates which define respective screen displays, including text display areas and text input areas, and also a set of corporate logos. When an intelligent peripheral of the network is not able to proceed with a call in accordance with an application, a failure notification is sent to the network, which reroutes, i...

A communications exchange for automatically interconnecting subscriber lines and trunks employs a switching network operable to establish a large number of possible message transmission paths between subscriber terminators and trunk terminators; multiple computers are operable simultaneously upon network transmitted message processing data to similarly process the data and produce output signals; and communication of data between the switching network and computers is established through a syste...

A number of different remote units are interrogated and controlled by signals transmitted thereto from a master station. The transmitted interrogation and control signals take the form of three radio-frequency signals at three different frequencies. Each radio-frequency signal is coded in a binary manner by turning same off and on. Timewise, the parallel interrogation and control signals are serially divided into successive frame periods wherein each frame period may include a remote unit identi...

A telemetry and control system is disclosed which allows a control office to communicate with a plurality of remote field stations over a preferably duplex communication channel. Transmissions, both controls and indications are formatted as messages comprising a number of words. The first word comprises the address of a selected field station to which the controls are, or have been, directed. A variable number of control words or indications and a check word or words conclude the message.

A vehicle communication system for a vehicle moving along a trackway comprises a conductor loop laid in the path of the vehicle, a transmitter arranged to feed a signal into the conductor loop, magnetic and electric field sensing means being provided on the vehicle to pick up the magnetic and electric fields produced by the signal flowing in the loop and wherein a multi-turn coil extending in the path of the vehicle is connected to one end of the loop. Means are provided to suppress the electric...

A processor substation for a communication system includes interrupt circuitry for transmitting coded communications as logic levels, rather than fixed length bits, so that communications can be handled at various code speeds and bit lengths. A message to be received by a subscriber is processed by an interrupt means in the substation to change the signal level to the subscriber whenever a transition occurs in the message (e.g. 1 to 0, and vice versa).

A transponder for use in a communication system for receiving and transmitting electro-magnetic signals, includes a first antenna array operative for receiving a first signal from a first direction and transmitting a second signal, a second antenna array operative for transmitting the second signal in a second direction, and a signal processor coupling the first and second antenna arrays to each other and being operative for receiving the first signal from the first antenna array, for phase shif...

A flexible, modular communications processor is disclosed comprised of a plurality of microprocessors. A demand assigned bus is provided to couple the microprocessors through an arbitrator to an information storage and retrieval device. Each of the microprocessors comprises a conventional integrated circuit microprocessor, associated local memory, transmitters and receivers for coupling information to and from the bus and bus access circuitry, cooperating with the arbitrator to allocate the bus ...

A spread spectrum communication system comprising a convolver to one end of which a message is fed comprising a plurality of bits, the convolver being long enough in the direction of signal propagation therethrough to store contemporaneously two message bits each of which comprises a plurality of sub-bits or chips having a predetermined sequence, signal generator means operative to generate reference bits, at one to one mark space ratio, each reference bit comprising chips or sub-bits correspond...

A communications network is composed of a central mode and a plurality of remote nodes with each of the nodes including receiving means for receiving signals and transmitting means for transmitting signals. At the remote nodes each including two receiving means and a signalling means for transferring to the associated transmitting means for transferring to the associated transmitting means one kind of signal when signals are received by both associated receiving means and another kind of signal ...