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7433986 |
Minimizing ISR latency and overhead
The capability to handle the 100 μs RPR interrupt and similar interrupts is provided by servicing selected interrupts outside of the operating system. This drastically reduces the latency and...
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6768749 |
Dual-channel communications protocol providing enhanced capabilities for modems
A system providing a framework for the negotiation of a dual-channel communication protocol between modems connected by a communications link. The dual-channel communications link includes a data...
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6032126 |
Audio and audio/video operator intercom for a fuel dispenser
An apparatus for installation in a retail setting for selling fuel and other products ordered by a customer interacting with an operator. A video control system interfaces an external audio/video...
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5392282 |
Circuit arrangement in a mobile phone for a digital mobile telephone system
A mobile phone with a basic unit provided with a memory necessary for the processing of speech signals only, whereby the processing of the possible data signals is carried out in an auxiliary unit...
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5214650 |
Simultaneous voice and data system using the existing two-wire inter-face
A data adapter for simultaneously providing a low speed channel, a first high speed data channel, and a second high speed channel over a two wire connection; the two wire connection connects the...
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5042028 |
Communication terminal device
A communication terminal device connected to a communication network via a plurality of information channels used for transfer of information such as line switching information or packet switching...
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4789981 |
System for providing data services to a circuit switched exchange
A system for providing data services in an evolutionary fashion as well as providing access to external data communication networks for subscribers to a circuit switched voice exchange includes a...
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4747073 |
Terminal for communication with a remote data processing system
A videotext terminal for connection to a telephone carrier is enhanced by an internal bus extension device providing additional ports associated with connector means which can receive anyone of a...
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4719617 |
Full service voice/data system
A full service voice/data system includes a networking medium having a plurality of substantially identical subsystems interconnected thereto. Each subsystem includes a local voice information path...
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4688035 |
End user data stream syntax
Disclosed is a communication transport message format for carrying control information, relevant only to a transport system and end user data. The end user data is prefixed by a length field. The...
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4653090 |
Graphics based call management
There is disclosed a method of setting up, manipulating, and taking down communication connections. The telephone instrument would include a graphics screen, such as a PC, and a series of call...
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4642805 |
Digital link for telephone station sets
A pair of integrated circuits are described which provide a digital link between a branch exchange and a voice and data channel using an ordinary twisted pair. The downlink circuit permits coupling...
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4601035 |
Data communication method and circuitry
A data communication method and circuitry which uses a compatible subset of a standard high level data link control (HDLC) protocol to control link level communication between a digital terminal...
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