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| Number | Title | Issue Date |
| 5594781 | Mobile telephone connection transfer A method for transferring an active connection between a mobile telephone handset and a first mobile telephone system to a second mobile telephone system, which includes the steps of detecting that signal strength of the active connection has fallen below... | 01/14/1997 |
| 5572698 | System and method for allocating memory resources where the category of a memory resource determines where on a circular stack a pointer to the memory resource is placed A system and method for flexibly and efficiently allowing multiple categories of data to be managed using a circular stack containing pointers pointing to memory resources within a memory resource area. The pointers to these memory resources can be obtain... | 11/05/1996 |
| 5563881 | Multihop distribution lists Method and apparatus for use in a network of store and forward messaging system sites which avoid infinite loops while providing user access to distribution lists in the network, the members of which distribution lists are users and distribution lists loc... | 10/08/1996 |
| 5561703 | System and method for integration of a paging server into a private branch exchange environment A communication system and method of use which integrates a paging system into the PBX communication environment providing enhance performance and capabilities. A PBX environment brings together many forms of communication: telephony conversations, voice ... | 10/01/1996 |
| 5559964 | Cable connector keying A cable connector having pins reserved for conveying data through shorting can be used to automatically convey pertinent information concerning the cable, the system to which the cable is connected, whether the cable is attached at all, or any combination... | 09/24/1996 |
| 5524243 | Parallel programming of field programmable gate array devices Method and apparatus for rapidly configuring several field programmable gate arrays ("CFPGAs"), some of which FPGAs are of different sizes. In accordance with the present invention, the configuration is provided to each FPGA in parallel, on a bit-wise bas... | 06/04/1996 |
| 5502761 | Apparatus and method for relaying calling information to a pager or alternate telephone Method and apparatus for relaying calling information such as Automatic Number Information (ANI) in a public or private telephone network. The calling information is relayed from a base telephone to a remote receiver (pager or telephone) in a one step pro... | 03/26/1996 |
| 5473672 | Inband messaging system interface of a PBX A method for responding to a call to a called associated with a private branch exchange ("PBX") which is connected to a central office ("CO") by direct inward dial ("DID") trunks, which PBX is connected to a messaging system, the method includes the steps... | 12/05/1995 |
| 5452347 | Dual-line telephone bridging device that gives remote telephones access to communications features A feature telephone having an internal mechanism for providing access to its features from a remote location. Without third party intervention or the aid of special features on a PBX or public network, a remote user can set up his office phone to transfer... | 09/19/1995 |
| 5440616 | Method and apparatus for interconnecting a messaging system and a private branch exchange Interconnecting a messaging system (voice, facsimile, and so forth) with a PBX which provides entirely digital voice transmission and which provides high bandwidth and redundant transmission of control information between the messaging system and the PBX.... | 08/08/1995 |
| 5440262 | High-efficiency Ring/MWL generator An embodiment of the present invention is a power generator which provides a power waveform for applying power to ringing circuits and message-waiting lamps (Ring/MWL) in standard analog telephones in a PBX and which power generator reduces power dissipat... | 08/08/1995 |
| 5430730 | Method for building a sub-network in a distributed voice messaging system Method for building a sub-network for a distributed Voice Messaging System that can be initiated from any of the nodes in the sub-network. For the distributed application to work, all the nodes in the network being created must be identified, numbered, an... | 07/04/1995 |
| 5425124 | Lightpipe providing wide angle output A lightpipe which outputs light in a wide angle output pattern. An embodiment of the inventive lightpipe has a longitudinal cross section which has at least one section with a varying width. In addition, a preferred embodiment of the inventive lightpipe h... | 06/13/1995 |
| 5359648 | Escape sequence using monitoring of control signal states A method and apparatus for escaping from transparent mode in which the Data Communication Equipment will escape from transparent mode (into command mode) if a user programmed escape character string is received in coincidence with the toggling of a contro... | 10/25/1994 |
| 5345589 | Centralized monitoring of activity in a distributed processing system Method for centralized monitoring of activity in a distributed processing system which permits a monitor to decipher the relative time sequence of events which occur in the distributed processing system. The method includes the step of generating informat... | 09/06/1994 |
| 5287498 | Message transmitting system wherein recipient site is determined using information concerning the relationship between the sender and recipient sites Method and apparatus for providing a universal addressing plan for a network of voice store-and-forward messaging system sites wherein a telephone numbering plan for a telephone network can be mirrored among the sites in the network, notwithstanding wheth... | 02/15/1994 |
| 5287399 | Method and apparatus for processing downlink digital voice data A method and apparatus for preprocessing digital voice data enroute to or from a Telephone's CODEC. The apparatus supports a CODEC directly connected to an internal bus and using a separate CODEC clock and sync signal to control transfers between a teleph... | 02/15/1994 |
| 5287352 | Method and apparatus to reduce register overhead in a serial digital interface A method and apparatus for transferring data between telephony communications lines having different frame transmission rates. A downlink data frame according to a first protocol (e.g. a ROLMlink frame) is transmitted, at a first data rate, from a private... | 02/15/1994 |
| 5283893 | Method for sorting objects in a sequentially addressed array Method for sorting, in place, objects in an array of sequentially addressed locations into two partitions, the first partition containing all of the even addressed objects and the second partition containing all of the odd addressed objects. In accordance... | 02/01/1994 |
| 5268957 | Automatic call-back "camp-on" service for communication systems The present invention is directed to a technique for selectively storing a message (or note) by a calling party in a communication system when a call to a called party cannot be completed and an automatic or manual redial function is activated. When a cal... | 12/07/1993 |
| 5251256 | Independent hysteresis apparatus for tone detection To detect tones for call progress monitoring, hysteresis apparatus is provided whereby the output of a typical tone detector such as a comparator operating in conjunction with a selective filter is monitored by a counter. The counter is incremented and de... | 10/05/1993 |
| 5249186 | Apparatus for detecting the start of frame in bipolar transmission systems Apparatus is provided to provide a start of frame signal for an incoming bipolar information signal wherein one binary state is alternately encoded with positive and negative level pulses, each of a given duration, and the other binary state is encoded wi... | 09/28/1993 |
| 5241586 | Voice and text annotation of a call log database Method and apparatus for automatically receiving, storing, and reviewing call activity information and call annotation information, which method and apparatus provides logical connections between the call annotation information and call activity informati... | 08/31/1993 |
| 5239453 | DC to DC converter employing a free-running single stage blocking oscillator A DC to DC converter employs a single ended blocking oscillator which employs a transformer having a primary winding and a plurality of secondary windings. The transformer has a core which is of a square loop hysteresis type. The blocking oscillator is su... | 08/24/1993 |
| 5231375 | Apparatus and method for detecting theft of electronic equipment A system is disclosed for deterring theft of portable electronic equipment that operates in accordance with an industry standard known as EIA-232-D. A theft deterrent unit monitors signal current transmitted between interconnected electronic units. When o... | 07/27/1993 |
