Abstract: A wireless telecommunications system includes a central station communicates with a plurality of subscriber stations served by the central station. The central station is connectable to a telecommunications network under a multiplexed multi-channel digital data telecommunications protocol having a plural number of data channels. Each subscriber station provides a line connection for carrying a predetermined number of digital data channels, where the plural number is greater than the predetermined number. The central station is connectable to each subscriber station via a wireless link under a wireless link protocol having the predetermined number of data channels. The central station includes a central protocol interface for converting between the multi-channel telecommunications protocol and the wireless link protocol for each wireless link.

Abstract: A transport interface (10) provides add drop multiplex functionality and termination requirements for the transportation of network traffic. The transport interface (10) includes high speed units (12), broadband interfaces (16), and SONET formatters (18). Each high speed unit (12), broadband interface (16), and SONET formatter has redundant protection pairs (A and B). The high speed units (12), broadband interfaces (16), and SONET formatters (18) communicate with each other by in-band datalinks (40). The redundant protection pairs (A and B) communicate with one another by protection pair datalinks (42). The in-band datalinks (40) and the protection pair datalinks (42) provide an effective means for performing protection switching within the transport interface (10) in the event of component failure. The in-band datalinks (40) are generated out of available or consumed bytes within either a section overhead (32) or a line overhead (34) of SONET OC-N frame (30).

Abstract: A wireless telecommunications system (1) includes a central terminal (10) for transmitting and receiving radio frequency signals to and from a subscriber terminal (20). A downlink communication path is established from a transmitter (200) of the central terminal (10) to a receiver (202) of the subscriber terminal (20). A downlink signal (212) is transmitted from the transmitter (200) to the receiver (202) during setup and operation of the wireless telecommunications system (1). The wireless telecommunications system (1) operates in one of three operating modes. In an acquisition mode during establishment of the downlink communication path, the downlink signal (212) is transmitted at a high power level and a low transmit rate with the receiver (202) operating at the low transmit rate. In a standby mode after establishment of the downlink communication path, the downlink signal (212) is transmitted at a low power level and a low transmit rate with the receiver (202) operating at the low transmit rate.

Abstract: A multi-rate transmission system (10) includes a receive section (12) and a transmit section (14). The receive section includes a receiver (16), a clock recovery unit (18), and a serial to parallel converter (20) all operating at a first clock rate (M). The receiver (16) also has a frame recovery unit (22) that operates at any of a plurality of clock rates, including the first clock rate (M) and a second clock rate (M/n). When the frame recovery unit operates at the first clock rate (M), frame information received by the receiver section (12) has unique bits occupying each bit position associated with each clock pulse of the first clock rate (M). When the frame recovery unit (22) operates at the second clock rate (M/n), each unique bit of the frame information occupies a number of bit positions according to a ratio of the first clock rate (M) to the second clock rate (M/n). Similar operation occurs with respect to a frame formatter (30) in the transmit section (14) of the multi-rate transmission system (10).

Abstract: In the inbound direction, a tributary processor (32) includes an SPE encoder/decoder for extracting a synchronous payload envelope (SPE) from an STS-1P signal. A path terminator (62) may extract DS3 signals or a matrix payload envelope (MPE) from the STS-1P SPE. A DS1/DS3 extractor (68) generates DS1 signals from either the DS3 or MPE signals. An MPE mapper (70) creates MPE signals from the DS1 signals. A wideband stage interface (74) converts the MPE signals into matrix transport format (MTF) signals for cross-connection in a wideband center stage matrix (22). In the outbound direction, the wideband stage interface (74) receives MTF signals from the wideband center stage matrix (22) and generates MPE signals therefrom. The MPE signals are sent through the MPE mapper (70) in order to extract DS1 signals. The DS1 signals are converted to DS3 signals or another MPE mapping by the DS1/DS3 extractor (68). The path terminator receives DS3 or MPE signals for conversion into an STS-1P SPE.

Abstract: A communications interface is used in a telecommunications network station which including a number of network elements, a controller for controlling the network elements and an internal bus interconnecting the controller and the network elements. The controller operates as a busmaster on the bus and each of the network elements operates as a slave on the bus. The communications interface has a pool of buffers for temporary message storage and a polling function for temporarily storing a message received from the bus in a buffer and/or for taking a message from a buffer for transmission over the bus. A binary sequence number is inverted for a reply if a received message is valid, otherwise it is not changed for the reply. A message is re-sent when the sequence number in a reply has not changed.

Abstract: A digital desynchronizer device (10) includes an elastic store unit (12) that receives data in an asynchronous manner and synchronously transmits the data in response to a synchronization clock generated by a clock generator (14). The clock generator (14) operates off of a reference oscillator unit (16). The clock generator (14) generates the synchronization clock signal in response to pointer adjustments identified by a pointer movement unit (18). The clock generator (14) also generates the synchronization clock signal in response to mapping jitter identified by a mapping unit (20). The pointer movement unit (18) and the mapping unit (20) identify pointer adjustments and mapping jitter, respectively, independent of each other. The clock generator (14) adjusts a width of a specific pulse bit in response to pointer adjustments identified by the pointer movement unit (18).

Abstract: An integrated directional antenna includes a radome, a resonant cavity within the radome, a microstrip radiator and a patch re-radiator positioned within the resonant cavity to provide a directed or focused beam. A first radiator can be provided for signal transmission and a second radiator for signal reception. A chassis member is located within the radome and defines the resonant cavity/ies and a rear cavity for electronic components. A rear cover can incorporate an integral heat sink for dissipating heat from electronic components within the rear cavity. An antenna mounting bracket has first and second spaced mounting points to allow a large range of mounting angles with a compact construction. The chassis member, the radio transmission and/or receiving elements and the electronic circuit elements can be sandwiched together in a desired configuration by fixing the rear cover to the radome. The antenna finds particular application in the field of radio telephony systems.

Abstract: A method for simulating the behavior of a metastable state machine is presented. The method includes outputting a transitional value when the state machine exhibits metastable behavior, such as when a set-up or hold violation occurs. A randomly-determined value is output after the transitional value is output for a predetermined period of time.

Abstract: An N:1 transcoder (12, 40) with a compression data path that includes uncompressed digroup circuits (92, 94, 96, 98, and 100) each receiving N incoming uncompressed signal and extracting a plurality of control, signaling, and voice/data traffic channels therefrom, a compressor (120) coupled to the uncompressed digroup circuits (92, 94, 96, 98, and 100) and compressing data in selected ones of the extracted voice/data channels, and a compressed data circuit (126) coupled to the compressor (120) for packing the compressed data into predetermined channels of one compressed signal, and further providing control, signaling, and performance monitoring information embedded therein.

Abstract: A wireless telecommunications systems (1) includes a central terminal (10) for transmitting and receiving radio frequency signals to and from a subscriber terminal (20). A downlink communication path is established from a transmitter (200) of the central terminal (10) to a receiver (202) of the subscriber terminal (20). A downlink signal (212) is transmitted from the transmitter (200) to the receiver (202) during setup and operation of the wireless telecommunications system (1). The downlink signal (212) includes an overhead channel (224) having a power control signal (236). The power control signal (236) is capable of adjusting a transmitting power of a transmitter (204) in the subscriber terminal (20). Adjustment of the transmitting power of the transmitter (204) facilitates establishment and maintenance of an uplink communication path between the transmitter (204) of the subscriber terminal and a receiver (206) of the central terminal (10).

Abstract: A protocol converter for a wireless telecommunications system, the protocol converter comprising: an interface for receiving first protocol message packets from at least one control station of the telecommunications system and for transmitting first protocol message packets to the at least one control station; and a server in communication with the interface for maintaining the protocol converter and an object based telecommunications system control system; wherein the protocol converter converts first protocol message packets received from the interface into operations and converts operations into first protocol message packets for subsequent transmission to the at least one control station via the interface, the operations being received from and applied to the object based control system maintained in the server thereby to control the wireless telecommunications system.

Abstract: A wireless telecommunications system (1) includes a central terminal (10) for transmitting and receiving radio frequency signals to and from a subscriber terminal (20). A downlink communication path is established from a transmitter (200) of the central terminal (10) to a receiver (202) of the subscriber terminal (20). A downlink signal (212) is transmitted from the transmitter (200) to the receiver (202) during setup and operation of the wireless telecommunications system (1) carrying information partitioned into a plurality of frames. The downlink signal (212) includes an overhead channel (224) having a frame alignment signal (232) for each frame of information. The receiver (202) monitors the downlink signal (212) to identify the frame alignment signal (232). The downlink communication path is established when the receiver (202) identifies two successive frame alignment signals (232).

Abstract: A multi-service switch for a telecommunications network (10) is provided. A system bus (13) has an ingress portion (14) and an egress portion (16). The system bus (13) is operable to carry data in a plurality of time slots. A system bus control (11) comprises a head-of-bus control (12) having an output. The output of the head-of-bus control is coupled to the ingress portion (14) of the system bus (13). The system bus control (11) also comprises a tail-of-bus control (15) coupled to the head-of-bus control (12). The tail-of-bus control (15) has an input coupled to the egress portion (16) of the system bus (13). A plurality of interface modules (28.sub.1 through 28.sub.n) each have an input and an output. The input of each interface module (28.sub.1 through 28.sub.n) is coupled to the egress portion (16) of the system bus (13), and the output of each interface module is coupled to the ingress portion (14) of the system bus (13). An ingress/egress bridge (18) has an input and an output.

Abstract: The apparatus and method includes a backplane (14) and a plurality of cable connectors (16) arranged orderly on the backplane (14) to which the cables (12) are connected. A plurality of conductive groomer fingers (30) extend generally perpendicularly from the backplane (14) along at least one edge of the backplane (14), where slots of a predetermined width are defined therebetween. Each cable (12) has an EMI termination zone (32) packed in the groomer finger slots to achieve good electrical contact with the groomer fingers (30). A rear cover (34) is used to substantially enclose the backplane (14).

Abstract: A small broadband cross-connect system (10) includes a two-stage matrix (12) for processing and cross-connecting optical and electrical telecommunication network signals. An administration subsystem (14) provides centralized control and synchronization to the two-stage matrix (12). The two-stage matrix (12) may be expanded from 96 ports to 192 ports in a cost and space effective manner.

Abstract: A message handler for the transmission and/or reception of message packets in one or both directions between a telecommunications station and a controller for one or more telecommunications stations, has a number of control layers including a transmitter and/or receiver control layer for the transmission and/or reception of strings of characters between the controller and the telecommunications stations via a transmission line, a call control layer, above the transmitter/receiver layer, for establishing and maintaining connection with the transmission line when message packet transmission is required and a security layer, above the call control layer, for the exchange of authentication messages between the controller and the telecommunications stations to verify the identity of elements of the telecommunications station during the establishment of a call connection.

Abstract: A system for optimizing data for transmission that includes a data collector operable to collect a plurality of data packets, wherein each data packet includes an address label, a data assembler operable to order the data packets by address label and assemble all data packets with a common address label into a single data block with a single address label, and a transmitter for transmitting the data blocks, wherein the transmitter is operable to broadcast the data blocks.

Abstract: An integrated multiple cross-connect system (10) having remotely located components interconnected by integrated office links is provided. The system (10) includes a broadband matrix (20), at least one remotely located high speed line terminating equipment (30, 32) coupled to a telecommunications network, and an integrated office link (34, 36) interconnecting the broadband matrix (10) and high speed line terminating equipment (30, 32), the integrated office link (34, 36) carrying duplex transmission of an IOL-N signal of N multiplexed STS-1P optical signals at an OC-N rate, the STS-1P signal including data payload and overhead fields.