Matches 1 - 44 out of 44


Match Document Document Title
9002391 Method and system with adjusted power headroom reports for uplink resource allocation  
A wireless network allocates uplink resources to wireless communication devices (WCDs) based on power headroom reports, with more resources being allocated to WCDs reporting greater power...
8862172 Methods and procedures for high speed UE access  
A terminal random access procedure is improved by allowing a mobile terminal to correctly map signature indexes onto cyclic shifted Zadoff-Chu (ZC) sequences when the deployed cells support a...
8553848 Preserving voltage on telephone line over hard reset during planned outage  
Systems and methods can provide for preventing a false alarm generated during a planned network outage during a maintenance window. Security systems can generate and report alarms to a security...
8098767 Receiver adjustment between pilot bursts  
A receiver may train its equalizer using consecutive pilot bursts, divide the traffic between the consecutive pilot bursts into multiple sub-segments, and interpolate the trained equalizer...
7657010 System and method for establishing a high speed non-switched data connection  
A system and method for establishing a high speed, substantially constant circuit based data connection over a conventional telephone line is provided. The circuit based connection is...
7532563 Mechanism to improve quality of channel estimates in OFDM transmissions  
An OFDM (Orthogonal Frequency Division Multiplexing) system may utilize pilot symbol structures including two or more pilot symbols with pilot information on alternate tones. The pilot information...
7496345 Systems and methods for processing calls directed to telephones having a portable interface  
Disclosed are systems and methods which provide for processing of calls by determining when a called number is associated with telephone having a portable interface and providing call processing...
7065183 Method of controlling the transmitting power in a mobile radio system and corresponding mobile radio system  
A method is provided for controlling the transmitting power in a mobile radio system a corresponding mobile radio system is also provided. A signal emitted from a transmitter is received by a...
6829292 Increasing gain with isolating upstream and downstream filters and amplifiers  
Systems and methods are described for digital subscriber loop repeaters. A method of transforming a digital subscriber loop signals includes increasing a gain with a digital subscriber loop...
6535549 Method and apparatus for carrier phase tracking  
A method and telecommunication system for tracking the carrier phase of a received signal includes the addition of a pilot signal to the data component of the signal prior to modulation and...
6188763 Signal processing unit for network interface unit  
An improved, more intelligent network interface unit capable of processing signals received from a high speed transmission media and outputting the received signals without substantial...
5999520 Terrestrial flight telephone system  
A terrestrial flight telephone system comprises a number of air stations which communicate on a common frequency with a ground station. The ground station can handle calls from a number of air...
5802164 Systems and methods for controlling telephone sound enhancement on a per call basis  
In a communications system containing signal enhancement circuitry capable of selectively enhancing portions of a plurality of signals carried on a corresponding plurality of channels through the...
5546421 Self compensating spread-spectrum hybrid  
A communications station (10) couples a bidirectional input-output signal path (16') to two unidirectional signal paths; a transmit signal path (12') and a receive signal path (14'), using a...
5539806 Method for customer selection of telephone sound enhancement  
Methods and apparatus are disclosed for improving the clarity and intelligibility of incoming speech in a telephone connection. Improved sound quality is provided by automatically selecting, or...
5333194 Autoequalizing bidirectional-to-unidirectional hybrid network  
An autoequalizing hybrid circuit for providing a cancelation path to minimize the two-wire receive path signals that are reflected onto a two-wire transmit path from a subscriber line interface...
5206902 Network signaling arrangement for controlling tandem network functions  
A facility for establishing a signaling link over a telecommunications network connection formed by a number of network switches is provided so that an upstream switch may communicate with a...
4742530 Radio relay method and its apparatus for digital communication  
A radio relay method for digital communication using a heterodyne relay system consisting of terminal stations and relay stations each having radio repeaters using radio frequency of microwave or...
4607376 Digital radio relay system  
A radio relay system for a fully-digitalized transmission network is disclosed. In the system, a received auxiliary signal can be by-passed from receiver to transmitter via a switching circuit...
4583220 Analog subscriber carrier system repeater with automatic gain and slope correction  
An FDM subscriber carrier system with two pilots located adjacent the upper and lower ends of the high frequency band uses the detected pilot levels at a repeater to adjust the gain and slope...
4580260 Analog subscriber carrier system terminal with automatic gain and slope correction  
An FDM subscriber carrier system with two pilots located adjacent the upper and lower ends of the high frequency band uses the detected pilot levels at a remote terminal to adjust the gain and...
4352962 Tone responsive disabling circuit  
A tone responsive disabling circuit for disabling prior to the transmission of data on a telephone transmission line a device which is connected to the line for improving voice transmission on the...
4320257 Compensation of transmission losses in a telephone system  
In a telephone system, compensation for transmission losses over any given section of the transmission path is achieved by inserting at a selected location in the telephone transmission path a...
4242542 Frogging signal repeater for a transmission line communications system  
A frogging signal repeater for a transmission line communications system such as a telephone system having a trunk line connected between a pair of signal sources such as end central offices...
4139731 Telephone conference system with active analog conference  
A telephone conference system includes a conference bridge for coupling multiple conference ports associated with corresponding conference stations. The bridge includes means for summing incoming...
4061883 Repeater for transmission lines of differing lengths  
A circuit for varying the amplification afforded to a-c signals transmitted through a transmission line in accordance with the a-c losses of that transmission line. Gain control circuitry is...
4049928 Self-adjusting voice frequency repeater  
A self-adjusting voice frequency repeater for subscriber loops of varying ohmic resistances utilizing a multiplier-divider arrangement is disclosed.
4017695 Customer operated gain control circuit  
A customer controlled gain circuit allows a customer to control the transmission amplifier gain in a trunk circuit by means of multifrequency signals. The trunk circuit contains a multifrequency...
3748411 CARRIER SUPERVISORY ARRANGEMENTS  
A pilot-controlled transmission system is disclosed for use on communication cables. The pilot-signal is detected at a master repeater station and control pulses indicative of its level are...
3711647 CIRCUIT FOR INTERCONNECTION OF TELEPHONE AND RADIO-TELEPHONE NETWORKS  
Improvement in equipment used for making a telephone connection comprising a path on conductors and a radio path, such equipment being made less sensitive to parasitic disturbances due to a great...
3706862 AMPLIFIER CIRCUIT FOR TRANSMISSION LINES  
A circuit for increasing the amplitude of signals transmitted through a bi-directional voice transmission line. A series amplifying network energized in accordance with the voltage across the line...
3548120 TRANSMISSION LINE REPEATER STATION FOR TWO SIGNALS TRAVELLING IN OPPOSITE DIRECTIONS  
3511931 CONFERENCING NETWORKS EMPLOYING VIRTUAL GROUND SUMMATION TO OBTAIN ISOLATION  
3503002 TRANSISTOR NEGATIVE IMPEDANCE AMPLIFIER,STABLE IN SHORT CIRCUIT,PARTICULARLY FOR TELEPHONE SYSTEMS  
3465104 STEP-BY-STEP TELEPHONE SYSTEM WITH RANGE EXTENSION  
3435360 ZERO OUTPUT IMPEDANCE AMPLIFIER  
3414687 Transmission system having a plurality of separate parallel transmission lines and common control of intermediate repeater stations in the transmission lines  
3414688 Communication system having level control means for repeaters connected along a transmission cable  
3306982 Level control device  
3302175 Attenuation network for carrier-current telecommunication systems  
3290444 Coordination and control of transmission compatibility among private network, tie line, and toll message network lines and trunks in crossbar offices  
3166642 Signaling arrangement  
3121774 Gain regulating arrangement for carrier current telecommunication system  
2781417 Telephone transmission system  

Matches 1 - 44 out of 44