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Document Title |
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7418271 |
Smart antenna apparatus
A smart antenna apparatus including a receiving system, one or more beam analysis modules, a control channel monitoring module, a processing system, and a receiving beam switch is provided. The...
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7349721 |
System and apparatus for collecting information for use in a smart antenna system
A method of obtaining information for use in a smart antenna system is provided. The method includes monitoring an interface between a base station controller and a base station transceiver to...
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7346365 |
Smart antenna system and method
A smart antenna apparatus including a receiving system, one or more beam analysis modules, a control channel monitoring module, a processing system, and a receiving beam switch is provided. The...
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7289826 |
Method and apparatus for beam selection in a smart antenna system
A method of beam selection in a smart antenna system is provided. The method includes receiving a plurality of uplink beams by a plurality of receivers, each corresponding with one of the plurality...
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5748637 |
DTMF signaling on four-wire switched 56 KBPS lines
Dual tone multi-frequency (DTMF) address signaling on four-wire switched 56 kilobits per second (Kbps) service lines is obtained by determining the proper byte boundary information. An iterative...
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5457690 |
DTMF Signaling on four-wire switched 56 Kbps Lines
Dual tone multi-frequency (DTMF) address signaling on four-wire switched 56 kilobits per second (Kbps) service lines is obtained by determining the proper byte boundary information. An iterative...
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5327433 |
Digital tandem channel unit interface for telecommunications network
A digital tandem channel unit installable in an intermediate central office of a digital carrier telephone network maintains the digital format of the T1 traffic in the course of a DS0 tandem...
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5228030 |
Time division communication system frame changeover arrangement
A frame organized time division multiplex communication system includes a central office and at least one remote terminal. A time division link connected between each remote terminal and the...
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5144624 |
Direct digital access telecommunication system with signaling bit detection
In a telecommunication system, a circuit is provided for determining the system mode and for restoring converted signalling bits. The circuit is designed to be used in a telecommunication system...
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5008884 |
Private automatic branch exchange system with line accessing number adding feature
Disclosed is a PBX system connected through a communication line (61) to an ISDN public network (101), comprising a control unit connected to a PBX switching network. The control unit comprises a...
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4991169 |
Real-time digital signal processing relative to multiple digital communication channels
A dual digital signal processor (DSP) provides real time links between multiple time division channels of a digital carrier system (e.g. T-1) and a host data processor. Operating only on digital...
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4959849 |
End-to-end network surveillance
A method and architecture for end-to-end surveillance of network systems is disclosed. Comprehensive and rapid fault detection, fault segmentation, and self-testing of network elements are...
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4928276 |
T1 line format for robbed signaling for use with CCITT 32K bit per second ADPCM clear channel transmission and 64KBPS clear channel transmission
This invention provides for uniformly distributing signaling data in a T1 line format for unrestricted 32 kb/s and 64 kb/s transmission channels. This scheme provides for placing a portion...
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4864565 |
Method for frame synchronization of an exchange of a PCM time multiplex telecommunication system
A frame start word derived by superframe formation is found by testing for the presence of a correct binary value combination each bit position in a time window having the length of as many bits as...
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4580259 |
Switchboard control system
A switchboard control system in which a plurality of switchboards are connected to a time division exchange and controlled by the time division exchange. A speech signal and a control signal (a...
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4429387 |
Special character sequence detection circuit arrangement
A special character sequence detection circuit arrangement for use with a central exchange of a time multiplex digital telecommunications system connecting data terminals evaluates an established...
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4316285 |
Framing circuit for digital receiver
The possibility of framing a receiver on a false pattern either generated, for example, by a data subscriber, or simply one statistically occurring in the normal digital transmission is minimized...
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4316284 |
Frame resynchronization circuit for digital receiver
Framing of a digital receiver to synchronize with a true framing pattern is realized by employing an autonomous clock to generate framing pattern bits and other timing signal, and by employing a...
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