公开(公告)号：NL8002214A

公开(公告)日：1980-11-06

申请号：NL8002214

申请日：1980-04-16

Applicant: NORTHERN TELECOM INC

IPC: H01T1/20 ,  H01T2/02 ,  H02H9/04

Abstract: A gas filled surge arrester having improved impulse ratio, characterized by an ion source in an electric field outside of the spark gap.

公开(公告)号：FR2295651B1

公开(公告)日：1979-09-07

申请号：FR7538467

申请日：1975-12-16

Applicant: NORTHERN TELECOM INC

IPC: H04M3/32 ,  G01D5/12 ,  H04L1/14 ,  H04B17/00

Abstract: Improvements in apparatus for measuring characteristics of a communications channel, characterized in that a programmable local unit is arranged in one of two terminals between which the measurement is made, to exchange analog test signals with the communication channel; a central digital computer device for exchanging digital information signals with the programmable local unit, and a first communication link between the control device and the local unit for retransmitting said digital information signals. (Machine-translation by Google Translate, not legally binding)

公开(公告)号：ES443520A1

公开(公告)日：1978-03-16

申请号：ES443520

申请日：1975-12-16

Applicant: NORTHERN TELECOM INC

IPC: G01D5/12 ,  H04M3/32 ,  H04M

Abstract: Perfeccionamientos en aparatos para medir características de un canal de comunicaciones, caracterizados porque se dispone una unidad local programable en uno de dos terminales entre los que se realiza la medida, para intercambiar señales de pruebas analógicas con el canal de comunicaciones; un dispositivo ordenador digital central para intercambiar señales de información digital con la unidad local programable, y un primer enlace de comunicaciones entre el dispositivo de control y la unidad local para retransmitir dichas señales de información digital.

公开(公告)号：FR2295651A1

公开(公告)日：1976-07-16

申请号：FR7538467

申请日：1975-12-16

Applicant: NORTHERN TELECOM INC

IPC: H04M3/32 ,  G01D5/12 ,  H04L1/14 ,  H04B17/00

Abstract: Improvements in apparatus for measuring characteristics of a communications channel, characterized in that a programmable local unit is arranged in one of two terminals between which the measurement is made, to exchange analog test signals with the communication channel; a central digital computer device for exchanging digital information signals with the programmable local unit, and a first communication link between the control device and the local unit for retransmitting said digital information signals. (Machine-translation by Google Translate, not legally binding)

公开(公告)号：CA2287528C

公开(公告)日：2003-08-05

申请号：CA2287528

申请日：1998-04-27

Applicant: NORTHERN TELECOM INC

Inventor： CHANG CHURUI

IPC: H04W16/02 ,  H04W16/12 ,  H04Q7/36

Abstract: A method for configuring a spread spectrum cellular network for small-cell inclusion, by providing a finite series of PN-offsets, each PN-offset is separated by a constant value that is allotted to the spread spectrum cellular network (8). The finite series is portioned into a first and a second set. The second set subsequent to the first set and having sufficient PN-offset elements for a PN-offset reuse pattern having a plurality of cells (20), each cell having similar transmission characteristics. 7.'he second set is assigned to the PN-offset reuse pattern , deploying the cellular reuse pattern for a cellular network. Small cells (10 ) are insertable into the spread spectrum cellular network by assigning the first set to a PN-offset reuse pattern having a plurality of small cells (10) arranged in a small-cell reuse pattern, and deploying the small-cell reuse pattern. In another aspect, the method for configuring the spread spectrum cellular network involves sectoring each cell of the plurality of cells into a plurality of sectors. The sectored cells ar e assigned PN-offsets adjacent in the finite series together in each sector of the sectored cell while maintaining sufficient distance between cells that reuse an assigned PN-offset.

公开(公告)号：AU724255B2

公开(公告)日：2000-09-14

申请号：AU3487097

申请日：1997-06-13

Applicant: NORTHERN TELECOM INC

Inventor： RAM GEETHA R ,  THOMPSON ROGER L

IPC: H04M3/42 ,  H04Q3/00

Abstract: An apparatus and method for providing a telephone operating company with the ability to rapidly deploy advanced services into a public switched telephone network includes a service control unit (SCU) for externally controlling call processing of a service call received on a port of a switch matrix. Call control processing is achieved through a high-speed communications link between the switch matrix and the SCU. The SCU receives a new call event notification message from the communications link and selects a service application stored within the SCU to control processing of the service call. One or more primitives is generated by the SCU and output to control actions of the switch matrix, thus controlling processing of the service call. The primitives may include a comprehensive set of primitives (instructions) for call manipulation and control at the switch matrix. The SCU may execute different service application software programs that operate within the SCU for different types of service calls that are under the control of the SCU.

公开(公告)号：CA2289348A1

公开(公告)日：2000-06-30

申请号：CA2289348

申请日：1999-11-09

Applicant: NORTHERN TELECOM INC

Inventor： HIMBEAULT LEE C ,  CHOW KEN

IPC: H04L12/64 ,  H04L45/02 ,  H04M3/10 ,  H04M3/22 ,  H04M7/00 ,  H04Q3/00 ,  H04Q3/62 ,  H04M11/06 ,  H04L12/16 ,  H04L12/56

Abstract: A virtual network map view of all nodes is provided in a network which is representative of VoIP utilization of the network. As VoIP packets traverse elements of the network, information is stored or logged for use by a network management service. Combined with knowledge of the physical manifestation of the network, the virtual network map is created and used to manage the network as it relates to VoIP traffic. Other modeled devices such as routers, frame relay access devices (FRADs) and switches complete the picture by representing the logical virtual connections between nodes. A virtual link between communicating ICS devices is modeled, managed and configured independent of actual multiple and complex real interfaces or links.

公开(公告)号：CA2289185A1

公开(公告)日：2000-06-30

申请号：CA2289185

申请日：1999-11-09

Applicant: NORTHERN TELECOM INC

Inventor： SENYSHYN PAUL ANDREW ,  WOLLENSAK MARTIN ,  HIMBEAULT LEE C

IPC: H04L12/413 ,  H04L12/64 ,  H04L29/02 ,  H04L12/24

Abstract: A node on a collision detection protocol based network forces collisions to gain control of the network when it has real time data that needs to be transferred to another node on the network, and then begins transmitting the real time data prior to other nodes gaining control of the network. Each node which has real time data to transfer keeps track of a maximum wait time parameter to determine when the real time data must be transferred to ensure it arrives at a destination on time. As the maximum wait time is approached, the node forces a collision by transmitting even though it senses another node is already transmitting to force the network into a quiet mode. It then starts transmitting the real time data prior to other nodes beginning transmission.

公开(公告)号：DE3380975D1

公开(公告)日：1990-01-18

申请号：DE3380975

申请日：1983-04-22

Applicant: NORTHERN TELECOM INC

Inventor： SIMS JR

IPC: G11B15/07 ,  G11B15/02 ,  G11B15/04 ,  G11B15/06 ,  G11B15/08 ,  G11B15/16 ,  G11B15/17 ,  G11B15/675

Abstract: A switch assembly is provided for a tape drive adapted to receive a tape cartridge. The assembly comprises a housing, first and second switches fixedly mounted on the housing, and first and second plungers mounted for reciprocal movement on the housing to actuate the first and second switches, respectively. The housing includes three orthogonal reference surfaces, all of which engage the tape drive to locate the assembly in proper relationship to the tape drive. The plungers are responsive to the tape cartridge to actuate the first switch when the tape cartridge is properly mounted on the drive and to actuate the second switch when the tape cartridge is not write-protected. The assembly may include a light source and a tight-responsive switch which, together with a reflector in the tape cartridge, cooperate to detect position-indicating tape apertures.

公开(公告)号：IT1135794B

公开(公告)日：1986-08-27

申请号：IT2170981

申请日：1981-05-14

Applicant: NORTHERN TELECOM INC

Inventor： DEWEY M SIMS JR

IPC: G11B15/675 ,  G11B

Abstract: A cassette or cartridge-loading tape transport is disclosed, for use in magnetic recorders and the like, especially data recorders. The device includes tracks for slidably receiving a cassette or cartridge. A plate is slidably supported below the tracks and a drive motor is mounted on the plate. A constant-force spring biases the plate to a forward position. A plurality of lever arms supporting rollers are pivotally mounted adjacent the plate. Each lever arm includes a cam surface cooperating with a cam surface on the plate so that the rollers on the arms are moved from a lowered, inoperative position to a raised position engaging, locating and locking the cassette or cartridge within the recorder. A constant-force spring biases the lever arms to a raised position.