Robert Larry Smith
Architects at Erskine Ct, Cary, NC

6215796, Apr 10, 2001

Mar 12, 1997

8/820335

Robert Lynn Smith - Cary NC

Nortel Networks Limited - Montreal

H04L 1228

370493

A system includes a plurality of end-user devices coupled to a communications controller which is connected to an integrated services digital network (ISDN) line of a telecommunications network. The ISDN line has two bearer channels bandwidth and a data channel. A method of subchannel bandwidth allocation from the bearer channels is initiated by establishing, as demanded for a particular end-user device, a call connection though the telecommunications network between the communications controller and another network terminator. The controller inquires, over the data channel, whether the network terminator is a compatible communications controller. If a positive compatibility indication, the two controllers allocate to the particular end-user device a subchannel from the bandwidth of the two bearer channels, wherein the subchannel consists of bandwidth up to the full bandwidth if the particular end-user device is a data processing unit or bandwidth sufficient for a controller-encoded voice signal if the particular end-user device is a telephone. If the positive compatibility indication is not received, allocating by the communications controller to the particular end-user device one of the two bearer channels.

6243390, Jun 5, 2001

Mar 12, 1997

8/820332

Robert Lynn Smith - Cary NC

Nortel Networks Limited - Montreal

H04L 1254

370437

A communications controller for interfacing multiple analog telephone terminals to an integrated services digital network (ISDN) line connected to a telecommunications network, the ISDN line having two bearer (B) channels and a data (D) channel. The controller comprises an ISDN interface providing a physical bi-directional interface to the two B-channels and the D-channel of the ISDN line. A base logic processor, and D-channel protocols process supports a Q. 931 protocol with a central office of the telecommunications network and an X. 25-based protocol with a remote device, via the ISDN interface and D-channel over which command and response packets to and from the base logic processor with the central office or the remote device are transmitted. Multiple analog interfaces are adapted to support respective telephone terminals for passing bi-directional analog voice signals. Selectable coders/decoders (CODECs), connected to respective analog interfaces, encode the analog voice signals to digital pulse code modulation (PCM) or adaptive differential PCM (ADPCM) and decode PCM or ADPCM to analog, as selected by the base logic processor.

6034953, Mar 7, 2000

Mar 12, 1997

8/820333

Robert Lynn Smith - Cary NC

Nortel Networks Corporation - Montreal

H04L 1228

370359

A system for interfacing a plurality of analog telephones to an integrated services digital network (ISDN) line of telecommunications network is disclosed. The system comprises a plurality of line interface units connected to respective telephones and a distribution line, and a communications controller interconnects the distribution line and the ISDN line. The communications controller transmits digital data frames on the distribution line, each frame having a frame start and a plurality of control channels and voice channels of which respective voice and control channels are associated with respective line interface units. The controller can instruct each line interface unit on the control channel of that unit, to issue ringing voltage, dial tone, busy tone or ringing tone, and it selectively couples the voice channels to the ISDN line. Each line interface unit can inform the communications controller, on the control channel of that unit, of switch-hook status of the connected telephone, a dialed directory number or dual tone multi-frequency (DTMF) digits collected. It also performs analog to digital coding and decoding of outbound and inbound voice signals, respectively, between the connected telephone and the voice channel of that unit.

6125127, Sep 26, 2000

Mar 12, 1997

8/820334

Robert Lynn Smith - Cary NC

Nortel Networks Corporation - Montreal

H04J 312

370524

In system having a plurality of telephones coupled to a communications controller which is connected to an integrated services digital network (ISDN) line of a telecommunications network, the ISDN line having two bearer channels of predetermined bandwidth and a data channel and the plurality of telephones being represented by a plurality of identifiers, a method for convenient incoming call acceptance comprises the communications controller associating each identifier for the plurality of telephones with a distinctive ring pattern. The controller receives, on the data channel, a dialed identifier of the plurality of identiers which was dialed in connection with an incoming call and rings all idle telephones of the plurality of telephones according to the distinctive ring pattern associated with the dialed identifier. The controller connects a first telephone of the idle telephones which goes off-hook, through a voice subchannel extracted from the bandwidth of the two bearer channels, to the incoming call.

5805395, Sep 8, 1998

Dec 13, 1996

8/766715

Yi Hu - Cary NC
David Hart - Raleigh NC
Damir Novosel - Cary NC
Robert Smith - Cary NC

ABB Power T&D Company Inc. - Raleigh NC

H02H 706

361 21

A system for implementing accurate V/Hz value measurement and trip time determination for generator/transformer overexcitation protection independent of the conventional frequency tracking and phasor estimation based on Discrete Fourier Transformation (DFT) techniques. The half-cycle summation technique of the invention is a non-recursive digital technique which measures the per unit V/Hz value by summing the sampled data points in every half cycle of a sinusoidal input signal and dividing the sum with the ideal base sum value. When the input voltage signal is sampled at a reasonable frequency, the technique of the invention approximates the accurate per unit V/Hz value of the input voltage signal and thus obtains an accurate V/Hz characteristic directly without computing voltage and frequency separately.

5987115, Nov 16, 1999

Apr 11, 1997

8/833990

Robert W. Petrunka - Raleigh NC
Robert L. Smith - Cary NC

Northern Telecom Limited

H04M 342

379265

A call servicing system facilitates the servicing of customer calls by service agents. The call servicing system includes local customer switches, local agents switches, a network switch, and an Automatic Call Distribution (ACD) server. The local customer switches direct calls to and from the customers and the local agent switches direct calls to and from the service agents. Remote service agents connect to the local agent switches using a single standard telephone line. The network receives a call from one of the customers, detects information from the customer call, and routes the customer call to a remote service agent over the single standard telephone line. The ACD server receives the detected information from the network switch, determines that the remote service agent can service the customer call, and controls the network switch to route the customer call to the remote service agent over the single standard telephone line.

5912604, Jun 15, 1999

Feb 4, 1997

8/794491

Ian James Harvey - Bloomington IN
Aftab H. Khan - Cary NC
Robert A. Smith - Cary NC
James E. Smith - Tarsboro NC

ABB Power T&D Company, Inc. - Raleigh NC

H01H 7500, H01H 3366

335 9

An electromagnetic actuator and an automatic recloser incorporating such actuator are disclosed. The actuator is shown to include a housing, a permanent magnet member, a coil, an armature, mounted to move axially within the housing between first and second positions, and a non-magnetic spacer. The armature, when in the second position, is spaced a distance from the housing by the spacer. The spacer is mounted to stop movement of the armature in the second position. In the preferred embodiment, the permanent magnet member includes a core and a number of magnet segments attached thereto. It is especially preferred for each of the permanent magnet segments to be arcuate shaped and that each segment be polarized substantially radially or in a direction parallel to the center radius of each segment. In a preferred embodiment, the housing is formed from a material having a high permeability and the spacer is formed from material having a relative permeability close to one or from a substantially non-magnetic material, such as acetal resin. The circuit recloser is shown to include the bistable magnetic actuator, a contact switch, a connecting member, connected between the actuator the contact switch and a spring, connected to bias the connecting member in relation to the contact switch.

6154687, Nov 28, 2000

Apr 15, 1998

9/060458

David G. Hart - Raleigh NC
Damir Novosel - Cary NC
Robert A. Smith - Cary NC

ABB Power T&D Company Inc. - Raleigh NC

H02J 114, H02J 302, H02J 1700, H02H 700, H02H 900

700294

A high sample rate cosine filter eliminates DC components by summing them such that they sum to zero. A non-orthogonal cosine filter is also provided. When the cosine filter is applied for N=4 samples per cycle, the samples are separated by 90 degrees. However, at higher sampling rates, it is not necessary to wait for 90 degrees to estimate the phasor value. Non-orthogonal components are used to estimate the phasor value. The time delay associated with the cosine filter is reduced in the process.