Abstract: Movable barrier monitoring apparatus and methods are provided for rapidly responding to barrier travel obstructions and other abnormal occurrences to cause the movable barrier operator to halt barrier travel or stop and reverse barrier travel, while ignoring typical and normal impediments to barrier travel. Alternate methods are described for programming the barrier operator controller to compare characteristics of the monitored barrier run over the defined travel path with the characteristics of a good barrier run without interruption to barrier travel, with the degree of differentiation of such characteristics determinative of whether the operator controller is to interrupt barrier travel or not.

Abstract: A moveable barrier system may include a moveable barrier configured to provide selective access to a space; a barrier operator configured to manipulate the moveable barrier between a closed position and an open position; a light; and a control station comprising a multi-function button configured to initiate more than one action by the barrier operator and by the light, the multi-function button being configured to initiate actions of: stopping an auto-close timer in response to receiving a first user input at the multi-function button; and toggling the light between an off state and an on state in response to receiving a second user input at the multi-function button.

Abstract: A garage door status monitoring and control system for a jackshaft operator may include a control module comprising a programmable platform configured to: receive a change-door-status command to change a position of a door; in response to the change-door-status command, generate and communicate a light or sound command to a wireless controller; delay a period of time after communicating the light or sound command to the wireless controller; and only after the delay, generate a door command corresponding to said change-door-status command to change the position of the door.

Abstract: A garage door status monitoring and control system for a jackshaft operator may include a control module comprising a programmable platform configured to: receive a change-door-status command to change a position of a door; in response to the change-door-status command, generate and communicate a light or sound command to a wireless controller; delay a period of time after communicating the light or sound command to the wireless controller; and only after the delay, generate a door command corresponding to said change-door-status command to change the position of the door.

Abstract: A moveable barrier system may include a moveable barrier configured to provide selective access to a space; a barrier operator configured to manipulate the moveable barrier between a closed position and an open position; a light; and a control station comprising a multi-function button configured to initiate more than one action by the barrier operator and by the light, the multi-function button being configured to initiate actions of: stopping an auto-close timer in response to receiving a first user input at the multi-function button; and toggling the light between an off state and an on state in response to receiving a second user input at the multi-function button.

Abstract: Movable barrier monitoring apparatus and methods are provided for rapidly responding to barrier travel obstructions and other abnormal occurrences to cause the movable barrier operator to halt barrier travel or stop and reverse barrier travel, while ignoring typical and normal impediments to barrier travel. Alternate methods are described for programming the barrier operator controller to compare characteristics of the monitored barrier run over the defined travel path with the characteristics of a good barrier run without interruption to barrier travel, with the degree of differentiation of such characteristics determinative of whether the operator controller is to interrupt barrier travel or not.

Abstract: Movable barrier monitoring apparatus and methods are provided for rapidly responding to barrier travel obstructions and other abnormal occurrences to cause the movable barrier operator to halt barrier travel or stop and reverse barrier travel, while ignoring typical and normal impediments to barrier travel. Alternate methods are described for programming the barrier operator controller to compare characteristics of the monitored barrier run over the defined travel path with the characteristics of a good barrier run without interruption to barrier travel, with the degree of differentiation of such characteristics determinative of whether the operator controller is to interrupt barrier travel or not.

Abstract: A garage door status monitoring and control system for a jackshaft operator may include a control module comprising a programmable platform configured to: receive a change-door-status command to change a position of a door; in response to the change-door-status command, generate and communicate a light or sound command to a wireless controller; delay a period of time after communicating the light or sound command to the wireless controller; and only after the delay, generate a door command corresponding to said change-door-status command to change the position of the door.

Abstract: Movable barrier monitoring apparatus and methods are provided for rapidly responding to barrier travel obstructions and other abnormal occurrences to cause the movable barrier operator to halt barrier travel or stop and reverse barrier travel, while ignoring typical and normal impediments to barrier travel. Alternate methods are described for programming the barrier operator controller to compare characteristics of the monitored barrier run over the defined travel path with the characteristics of a good barrier run without interruption to barrier travel, with the degree of differentiation of such characteristics determinative of whether the operator controller is to interrupt barrier travel or not.

Abstract: A method and system for requesting an interrupt from a host system to service an adapter connected to the host system and a data interface. Data packets, including one or more data cells, are transferred between the data interface and the host system. The host system includes a host memory that includes a plurality of memory slots to store data packets transferred between the data interface and the host system. It is determined when a transfer of data has resulted in an occurrence of an interrupt event. An interrupt event occurs when the transfer of data includes a transfer of a data cell between the data interface and the host system and the data cell is defined to be an end of a data packet. In response to the occurrence of an interrupt event, it is determined whether to generate an interrupt request to the host system.

Abstract: A mechanism for mitigating the rate at which status reports associated with raw cell data transfers occur during receive operations in a network node is presented. The network node has an adapter for coupling a network and a host system, the host system including a host memory. The adapter operates to reassemble cell data received from the network and store the reassembled cell data in the host memory. A raw report holdoff counter is programmed to count a number corresponding to a preselected rx raw report holdoff value. If a raw cell data transfer request to be processed is detected, rx raw report information necessary to creating an rx raw cell status report is copied to a temporary storage area. When the data is transferred to the host system, the raw report holdoff counter is modified by one. When the modified counter has expired, the rx raw report information is written to a report queue in host memory.

Abstract: A scheduler in accord with the invention schedules available bit rate (ABR) traffic over an asynchronous transfer mode (ATM) link in such a manner as to provide circuits having the ABR traffic service a minimum cell rate (MCR) that may be greater than zero. The scheduler uses static scheduling information to schedule traffic for high priority services, such as constant bit rate service. The static information also specifies transmit opportunities for an ABR circuit, in a manner analogous to that for CBR traffic. The statically scheduled transmit opportunities provide a negotiated minimum cell rate that is greater than zero, for the ABR circuit. The scheduler maintains dynamic scheduling information, which it uses to schedule traffic in otherwise available transmit times. For example, the scheduler may use the dynamic information to create a work list of virtual circuit connections for ABR service. During any cell transmit time that is not used by a higher priority service (e.g.

Abstract: This technical disclosure is for a structurally self-contained, RF-shielded enclosure which is rapidly deployable due to it's ultra light weight and ease of assembly. Assembled by one person in one half hour, the enclosure becomes an RF-shielded, free standing room within an existing non-secure room or environment. Lightweight metallized fabric is sewn together with rugged tent fabric and ballistics cloth. Fiberglass rods are connected to aluminum sleeves and unions to configure the room. A bulkhead assembly penetrates the side wall and provides filtered power and electronic signal interfaces. Honeycomb air guides and an electric fan facilitate air exchange within the room.

Abstract: A mechanism for avoiding an initiation of control read transactions on a system bus coupling a host system having a host memory and an interface connected to a peripheral unit as data is moved between the host system and the peripheral unit is presented. Control information associated with data memory portions in host memory is written to the interface for data memory portions storing outgoing data and data memory portions to receive incoming data. The interface includes a controller to move data between the host memory and the interface by first obtaining the control information for the associated data portions. The interface writes status reports in association with the movement of data between the interface and the host memory via the system bus. The mechanism thus enables data transfers to occur via the system without the initiation of control reads in absence of an exception condition.

Abstract: A method of scheduling the transmission of cells from a network node involves storing entries in a schedule table at predetermined locations, wherein each location represents a point in time at which a cell is to be transmitted. Each entry in the table contains a pointer to a list of virtual circuits having cells scheduled for transmission at the time corresponding to the location of the entry in the table. When a VC has a cell to be transmitted at a particular time, the VC is queued to the head, rather than the tail, of the list of VCs pointed to by the pointer located at the entry in the table corresponding to the time at which the cell is to be transmitted. The VC is therefore the first VC transmitted from the list of VCs.

Abstract: An apparatus and method for transferring data from a source memory (e.g. a host memory) to a peripheral interface via a bus utilizes a transmit buffer memory coupled to the peripheral interface, and a current time counter advancing at the rate at which data is to be transferred from the transmit buffer memory to the peripheral interface. A schedule table data structure stores entries in some or all of its locations, where each location corresponds to a point in time at which data is to be transferred from the transmit buffer memory to the peripheral interface. A schedule table pointer is used for pointing to successive locations in the schedule table. The schedule table pointer advances at a rate faster than the current time counter advances so that the schedule table pointer represents a point in time which is ahead of the point in time currently output by the current time counter.

Abstract: A mechanism by which interrupt frequency mitigation is combined with transmit raw cell status report frequency mitigation is presented. A tx raw cell status report is allowed to occur for only every N raw cell tx slots consumed. When the rate of interrupt requests is mitigated in accordance with holdoff parameters including a holdoff event count corresponding to X interrupt events and a holdoff time interval, and the raw cell status report counts as an interrupt event, an interrupt request is generated for an enabled interrupt if N*X events has occurred or the holdoff time interval has elapsed.

Abstract: A method and apparatus for transferring data units between a host memory and a peripheral interface, the data units being subject to a flow control mechanism whereby some of said data units are flow controlled and some of said data units are not. Two transmit buffer memories are coupled to the peripheral interface; one for storing controlled data units to be transferred to the peripheral interface and the other for storing uncontrolled data units to be transferred to the peripheral interface. A single request buffer stores successive requests for data to be transferred from a host memory to either of the two transmit buffer memories. Data transfer circuitry transfers data from the host memory to either of the two transmit buffer memories in response to the requests stored in the request buffer.

Abstract: An apparatus and method for transferring data from a source memory to a transmit buffer memory and then from the transmit buffer memory at a particular rate. A current time counter advances at the rate at which data is to be transmitted from the transmit buffer memory to the interface. A schedule memory stores entries, each valid entry being associated with data that is to be transmitted from the transmit buffer memory to the interface. A timestamp is associated with each valid entry in the schedule memory.