Matches 701 - 750 out of 794 < 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 >
Match Document Document Title
5752189 Mobile communication system which prohibits service to a mobile station having an ID number upon receiving a non-coincidence notice from the mobile station  
A mobile communication system intended to early detect unlawful mobile station. User information about accumulated call account is totaled by the network and the mobile station individually so as...
5748742 Fraud detection and user validation system for mobile earth terminal communication device  
In a mobile satellite system, a mobile communication system includes a fraud detection and user validation system and method for commissioning the mobile communication system in the mobile...
5745559 Restricted access telephones for logical telephone networks  
A logical network is defined by a plurality of restricted class telephones in which such telephones incorporate a network access code characterizing the logical network. Each telephone contains a...
5734978 Mobile telephone with function to prevent illegal use and method and system for preventing illegal use of mobile telephone using the function  
In order to prevent illegal use of a mobile telephone, a call is repeatedly originated from a telephone or base station to the mobile telephone over a wireless path. When the call is received by...
5734977 Fraud detection in radio communications network  
A method for detecting fraud in a cellular radio telephone system. Fraud is suspected when the system detects a multiple access from a mobile station, when an activity collision occurs, when the...
5727064 Cryptographic system for wireless communications  
A wireless communications system (110) with increased privacy. The system (110) transmits an encrypted signal between a base station (112) and a wireless terminal (122). In the forward channel, the...
5715523 Access control for a fixed cellular terminal using a secondary power source  
Access control is provided for a fixed cellular terminal using a secondary power source. Upon detecting an interruption of power from a primary power source, a signal is provided to reset a...
5713072 Cellular fraud deterrent system  
A system for deterring fraudulent cloning by a reader station of valid call-origination message parameters assigned to authorized mobile radiotelephone stations operating within a cell or other...
5703950 Method and apparatus for controlling country specific frequency allocation  
A secure communication system is provided for transmitting a country specific frequency allocation in encrypted form between a host processor and a remote device. The secure communication system...
5689549 Cordless telephone base unit arranged for operating with multiple portable units  
A cordless telephone system includes an arrangement wherein multiple portable units operate with a common base unit using the same security code without conflict or confusion. When a portable unit...
5670950 Private communications network system and method of authentication for a mobile station used in private communications networks  
A private communications network system allows a mobile station to be used in a different private communications network than that in which it is registered, by a method of authenticating the...
5615408 Apparatus and method for credit based management of telecommunication activity  
The present invention provides an apparatus for credit based management of a telecommunication system. One embodiment of the apparatus includes an interface for communicating credit information on...
5615261 Method and apparatus for detecting illicit RF data transmissions  
Detection of illicit radio frequency (RF) data transmissions is accomplished by employing an RF security monitor (120) positioned within the transmission range of a wireless communication system...
5608781 Method of eliminating or reducing cloning of electronic identification numbers of cellular telephones  
The method of eliminating or reducing cloning of electronic identification serial numbers (herein ESN numbers) of cellular telephones involves programming the phone to generate and broadcast the...
5608723 Methods and systems for secure wireless communication within a predetermined boundary  
A message signal which is to be securely communicated is encoded, using a preselected code, to generate an encoded signal. A radio frequency signal representative of the encoded signal is...
5604787 Method and apparatus for transferring information to a device in a communication system  
A smart card (100) is equipped with an internal time-of-day clock and calendar (106). Between the smart card (100) and a subscriber unit (209, 300), into which it is inserted, there is a...
5594740 Wireless communications application specific enabling method and apparatus  
A method and apparatus for wireless communication on an existing wireless communication network comprising taking existing data and manipulating the data to create manipulated data. The manipulated...
5586167 Wireless communication zone management system  
A wireless communication system formed of a plurality of antennae, the antennae being arranged in a grid pattern over a communication region, wireless portable terminals located within the...
5555551 Method and apparatus for fraud control in cellular telephone systems  
A method and apparatus for fraud control in cellular telephone systems. Call records from a switch are scanned to identify a fraudulent cellular phone based on its behavior. An identifier, e.g., a...
5555192 Detection of duplicate identification codes in communication units  
A monitoring computer (115) monitors the communications occurring within at least one communication system for a unique communication unit identification (ID) code associated with a communication...
5530737 Secure access telephone extension system and method  
A method and system is provided for conducting secure power line carrier communications in full duplex over the power lines of a building. Power line carrier current telephone extension systems...
5524134 Telecommunications security module  
A security module for use in a cellular telephone provides for low power consumption. The security module includes a vocoder processor for manipulating signals from the telephone's microphone and...
5517568 Method of detecting unauthorized use of a wireless communication channel  
A method for detecting unauthorized use of a communication unit (102) in a secure wireless communication system includes monitoring (201) a wireless communication channel (103) presently supporting...
5509075 Method of detecting unauthorized use of a communication unit in a secure communication system  
A method for detecting unauthorized use of a communication unit in a secure wireless communication system includes receiving, by a central controller, a service request from the communication unit...
5509052 Base storage of handset's base registrations  
A CT-2 base's intelligence (36) is enhanced by having a handset (12) transmit (418) its base registration history to the base station (24) such that the base can determine (724) whether the handset...
5500888 Cordless telephone security code initiation and prevention system  
A method and structure for increasing the security of a cordless telephone system by automatically altering the security code information stored in the cordless telephone handset and base unit....
5483465 Method for reprogramming duplicated communication units  
A monitoring computer (115) monitors a communication resource within a wireless communication system for transmissions by communication units. Upon detecting transmissions, which contains a...
5467382 Method and apparatus for clone detection in a communication system  
A system for clone detection within a communication system includes a message generator for generating a message to a subscriber having a first identifier and forwarding the message for...
5463659 Apparatus and method of configuring a cordless telephone for operating in a frequency hopping system  
A cordless telephone arranged for operation in a frequency hopping system includes multiple portable units configured for operation with a base unit and with each other by having the base unit...
5457737 Methods and apparatus to verify the identity of a cellular mobile phone  
A wireless-based communications system is provided with a method and apparatus for automatic verification of the identity of a mobile phone user in order to eliminate cellular piracy. A first...
5455863 Method and apparatus for efficient real-time authentication and encryption in a communication system  
Radio frequency based cellular telecommunication systems often require both subscriber units and communication units of a fixed network communication system to maintain secret data which may be...
5448764 Cordless telephone set with secure communication protocol  
In cordless telephone sets comprising at least one base station and at least one handset, an exchange of identification codes takes place between the base station and the handset. In order to...
5448760 Cellular telephone anti-fraud system  
Authorized use of a wireless subscriber system, e.g. cellular telephone system, is distinguished from unauthorized use by electronically observing a plurality of external signal traits which...
5428667 Multi-channel cellular communications intercept system  
A multi-channel cellular communications intercept system for monitoring and then intercepting communications between a mobile unit and a base station in one cell of a cellular telephone system. The...
5423079 Mobile communication terminal device and method of preventing incorrect information rewriting  
In a mobile communication terminal device, a serial number for use in charging control of a subscriber and so on is prevented from being incorrectly rewritten and hence the subscriber is prevented...
5420910 Mehtod and apparatus for fraud control in cellular telephone systems utilizing RF signature comparison  
A method and apparatus for fraud control in cellular telephone systems. Call records from a switch are scanned to identify a fraudulent cellular phone based on its behavior. An identifier, e.g., a...
5408682 Identification code search in a communication device  
With cordless telephones it is a known fact that each pair of radio stations has m radio channels out of n possible radio channels in common. During a test cycle the mobile unit examines only the...
5392354 Cordless phone system capable of scrambling communication signals  
A cordless phone system includes a first cordless phone and a second cordless phone which are coupled to each other by a network, the first cordless phone being formed of a first personal station...
5388212 Detecting unauthorized modification of communication unit based on comparison between stored hardware identification code and hardware identification code generated from operational platform identification code  
A database unit monitors the communications occurring within at least one communication system for hardware identification codes of communication or broadcast units. Upon detecting the hardware...
5388148 Cellular telephone calling system using credit card validation  
The cellular telephone credit card calling system works in conjunction with a cellular telephone, a local cellular network and an IXC in a telecommunications network. The cellular telephone has a...
5386468 Method of registering identification number in personal communication terminal  
Prior to the sale of a personal communication terminal, a secret key is generated and stored in the personal communication terminal in accordance with an application made from the manufacturer to...
5379343 Detection of unauthorized use of software applications in communication units  
A monitoring computer monitors the communications occurring within at least one communication system for at least one unique communication unit identification code (unit ID code) associated with a...
5365590 System for providing access to digitally encoded communications in a distributed switching network  
A distributed switching network (switch) routes audio and control signals throughout the switch from various audio sources to one or more audio destinations. Audio sources such as mobile/portable...
5345595 Apparatus and method for detecting fraudulent telecommunication activity  
An apparatus for detecting potentially fraudulent telecommunication activity, comprising a digital computer; interface, operatively connected to the digital computer, for receiving a call...
5343512 Call setup method for use with a network having mobile end users  
A distributed communication network includes switching offices (SOs), moving-orbit satellites, and subscriber information managers (SIMs). A population of mobile units (MUs) communicates through...
5341410 Cellular telephone locator using a mobile data system  
A mobile data terminal which is located proximate to a cellular telephone unit is used to provide customer location information from a foreign cellular telephone service region to the cellular...
5339353 Mobile communication system  
A mobile communication system includes an exchange, a plurality of radio base stations coupled to the exchange, and a plurality of mobile stations. The exchange includes a device for obtaining...
5337345 System for securing mobile telephones from unauthorized transmission  
A mobile telephone incorporating the invention includes in its transmitter circuitry a system for preventing unauthorized calls from being transmitted by the telephone. The system ensures that the...
5335278 Fraud prevention system and process for cellular mobile telephone networks  
An improved mobile telephone system, including a process and apparatus for detecting fraudulent requests for roamer cellular telephone services before the requested service is granted. The...
5335265 Apparatus for detecting and preventing subscriber number cloning in a cellular mobile telephone system  
This apparatus operates to discern temporal and spatial anomalies in the use of subscriber numbers in the cellular mobile telephone system. The detection of such anomalies is typically indicative...
Matches 701 - 750 out of 794 < 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 >