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7145906 Packet switching node  
To provide fast access times with very large key fields, an associative memory utilizes a location addressable memory and lookup table to generate from a key the address in memory storing an...
EP0769886B1 PCM signal switching system employing an integrated and programmable matrix  
Abstract of EP0769886 The invention relates to a PCM switching system employing elementary switching matrixes controlled by a control microprocessor ( mu P). Each elementary matrix including: one...
5842224 Method and apparatus for source filtering data packets between networks of differing media  
To provide for fast access times with very large key fields, an associative memory utilizes a location addressable memory and look up tables to generate from a key an address in memory storing an...
5784369 Methods and system for switching time-division-multiplexed digital signals of different rates  
A digital telecommunications switching system includes a main normal rate switch having multiple, bi-directional ports for selectively switching timeslot associated with normal rate channels...
EP0769886A2 PCM signal switching system employing an integrated and programmable matrix  
The invention relates to a PCM switching system employing elementary switching matrixes controlled by a control microprocessor ( mu P). Each elementary matrix including: one programming and...
5533022 Digital interface system for offices connected by plural digital lines  
A switching system between two offices connected by plural digital lines and an outband channel. Each digital line has plural channels, and each channel has a corresponding basic bit rate and is...
5490258 Associative memory for very large key spaces  
To provide for fast access times with very large key fields, an associative memory utilizes a location addressable memory and look up tables to generate from a key an address in memory storing an...
5442125 Signal processing apparatus for repeatedly performing a same processing on respective output channels in time sharing manner  
A signal processing apparatus according to the present invention is used as a sound source, an effecting machine and/or a communication equipment, which simultaneously generates or processes a...
5420854 Digital interface system  
Sub-rate calls of 8 k ×n bps (where n=1, 2, . . . ) are multiplexed in any combination on a digital transmission path having a basic (unit) bit-rate (64 kbps) as a unit. In order to set a...
5418783 Common channel signal extraction/insertion device  
A common channel signal extraction/insertion device for a multiplexed digital transmission system includes a common channel signal insertion/extraction circuit instead of time switches. The common...
5412657 Variable resolution time slot interchange circuit  
Disclosed is a circuit which allows an n-bit time slot interchanger (TSI) to process m-bit wide information, where m is some fraction of n. A packing circuit receives the information from the TSI...
5317572 Hybrid multiplex synchronizing method and apparatus therefor  
Disclosed are a hybrid multiplex synchronizing method and apparatus therefor, in which, when time-shared multiplexed data having different frame patterns and different frame lengths are inputted in...
5305314 Global load smoothing in a real time data imaging network system  
Real time periodic messages generated by a plurality of stations on a data communication network and having data periods ranging from a shortest to a longest, where the longest data period is an...
5157656 Nyblet time switch  
A data transmission method and apparatus provides for transmitting lower data rate information in a higher data transmission rate environment. Information entities to be transmitted are broken into...
5157651 Apparatus and method for determining line rates  
Apparatus and methods for automatically determining the bit rate of an incoming signal are provided. The apparatus includes a counter, a logic circuit, and a histogram generating circuit. The...
5051984 Methods for flexibly allocating bandwidth for a point-to-point serial, bidirectional communication path  
Methods are set forth which provide for the allocation of bandwidth for point-to-point, serial, bidirectional communication paths in a digital switching system. Bandwidth allocation is performed at...
5008902 Automatic baud rate detection  
Method for determining the baud rate of a data stream by comparison of captured data to known autobaud characters. Samples are received from the communication device and stored in memory until a...
5005171 Telecommunication transmission format suited for network-independent timing environments  
In a subrate-multiplexed communication system, a user channel whose data transmission rate fluctuates about a nominal rate from the viewpoint of a network--illustratively because the channel is...
5005170 Multi-rate multiplexing arrangement efficiently utilizing multiplexed channel bandwidth  
In a subrate-multiplexed telecommunication system that handles subchannels of different rates and hence assigns a plurality of time slots within a frame to at least some subchannels, time slots...
4999832 Broadband multirate switching architecture  
A broadband ISDN communication system (10) comprises a plurality of bit-serial synchronous time-division multiplexed ring networks (15) interconnected by a circuit switch (11). In each network,...
4987570 Methods and apparatus for performing time interleaved multiplexed rate adaptation for sub-rate channels in a digital data communication system  
Methods and apparatus are set forth which improved the sub-rate channel carrying capacity and the efficiency of bandwidth usage, over the CCITT I.463 standard, for switching systems having a...
4974217 Scale indicator used with electronic setting apparatus for setting numerical values of physical quantities or the like  
A scale indicator used with an electronic setting apparatus, in which at least one of first and second indication sheets has the front surface with a plurality of scale marks and windows, and a...
4965798 Apparatus for flexibly allocating bandwidth for a point-to-point, serial, bidirectional communication path  
Methods and apparatus are set forth which provide for the allocation of bandwidth for point-to-point, serial, bidirectional communication paths in a digital switching system. Bandwidth allocation...
4965796 Microprocessor-based substrate multiplexer/demultiplexer  
A subrate multiplexer (10) is implemented by means of a general-purpose microprocessor (20) that is programmed to perform subrate multiplexing functions, thereby eliminating much of the...
4965787 Methods and apparatus for multiplexing sub-rate channels in a digital data communication system  
Methods and apparatus are set forth which improve the efficiency of bandwidth usage over the CCITT I.463 standard, for switching systems having a granularity of better then 64 Kbps (e.g. 8 Kbps)....
4939723 Bit-channel multiplexer/demultiplexer  
An efficient method for time-division multiplexing multiple digital signals into a single data stream for switching and/or transmission of information to a remote location. The apparatus according...
4887264 Digital key telephone system  
In a digital key telephone system through which extension-to-extension calls can be made and incoming calls can be transferred between a master main installation and plural slave main...
4884267 TDM transmission system  
A time division multiplex transmission system includes: a time division multiplex encoder for supplying a master clock to a plurality of PCM digital signal sources having a same sampling frequency...
4819226 Framer circuit for use in a DTDM network  
A framer circuit which may be implemented as a single chip is disclosed. The framer circuit performs a number of functions in a DTDM network including generating trains of empty DTDM frames,...
4755988 Data communications switching device having multiple switches operating at plural selectable data rates  
A large scale integrated circuit device is disclosed that can be used as a component in a variable bandwidth branch exchange system or for other applications utilizing programmable network...
4736362 Programmable data-routing multiplexer  
A multiplexer for use in a digital subscriber controller having a number of analog ports and digital ports which can be programmed via an external microprocessor to establish time-division...
4639910 Apparatus for establishing communication paths  
An apparatus for establishing a plurality of communication paths includes a plurality of ports each having different data rates associated therewith and a means for establishing simultaneous paths...
Matches 1 - 32 out of 32