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7378165 |
System and method for providing electrical power to an equipment rack using a fuel cell
A system and method for providing electrical power to an equipment rack using a fuel cell is disclosed. The system discloses: an equipment rack; an electrical device located within the rack; a fuel...
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6408334 |
Communications system for multiple computer system management circuits
A communications system for multiple computer system management circuits to enable remote management of the computer systems via a remote management system. The management circuits are operably...
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5978875 |
Apparatus and method for scheduling use of bus
A continuous data server includes a storage unit connected to a buffer memory which is in turn connected to a plurality of communication control units which transfer data of the buffer memory to a...
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5553081 |
Apparatus and method for detecting a signal in a communications system
In a communications system, an apparatus and method for detecting a valid signal from noise. An adaptive threshold is used to qualify a received signal. The adaptive threshold is set according to...
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5539729 |
Method for overload control in a packet switch that processes packet streams having different priority levels
A system and method that controls potential overload of packet switches when the packet switch has multiple packet streams with different priority levels. A counter is associated with the higher...
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5388223 |
1-bit token ring arbitration architecture
A 1-bit token ring arbitration architecture where a plurality of chips which require access to a shared bus are coupled together in a ring is described. Each chip receives an arbitration in signal...
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5339440 |
Wait state mechanism for a high speed bus which allows the bus to continue running a preset number of cycles after a bus wait is requested
The present invention provides a protocol method for waiting the bus in a digital computer and an apparatus for implementing that protocol. By allowing the bus to continue running after a wait...
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5157659 |
Packet communication system and method of clearing communication bus
An apparatus and method of communicating data signals on a bus having an upstream portion to which transmitters of a plurality of station are connected, and a downstream portion to which receivers...
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4847613 |
Data transfer apparatus
In a data transfer apparatus, as one substation in a loop type signal transfer system, e.g. for use in an automatic machine, synchronization information and address information are received and the...
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4751700 |
Method and apparatus for local area communication networks
A bus accessing method and apparatus for the practice thereof in a communication network is disclosed. The network comprises a transmit bus, a receive bus, a plurality of BIUs connected between the...
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4736366 |
Bus acquisition system
A bus communication system is disclosed which provides low bus acquisition latency while supporting large block data transfers. A first device, which has control of a communication bus, detects a...
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4730307 |
Method and apparatus for local area networks
A bus accessing method and apparatus for the practice thereof, in a communication network, for transmitting information packets without the need for long communication periods following each...
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4714802 |
Apparatus and method for determining the source direction of local area network transmissions
A direction sensitive coupling unit, and method of operation, is disclosed for use in a communication medium to indicate the presence and source direction of transmissions. A directional coupler is...
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4707830 |
Token passing LAN using a plurality of tokens
A token passing local area network LAN is disclosed wherein each bus interface unit BIU monitors the token rotation time to determine if this time exceeds a predetermined maximum and, if so,...
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4707804 |
Computer security system
A security system for preventing access to a computer by an unauthorized remote user is disclosed. A plurality of information transmission paths, such as telephone lines, are connected to a...
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4701911 |
Media accessing apparatus and method for communication system
Apparatus and method for bus accessing, in a communication system, effective to minimize user to user delay variance is disclosed. The communication system comprises a transmit bus, a receive bus,...
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4682324 |
Implicit preemptive lan
Method and apparatus are provided for transmitting message signals in a high speed local area network which method performs as efficiently during intervals when few stations have messages to...
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4667322 |
Method and apparatus for local area networks
An improved method for transmitting messages from the buffers of a bus interface unit participating in a local area network is disclosed wherein the bus interface units are permitted to completely...
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