Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 4943999 | Switching system reliability A switching arrangement is disclosed in which connections are advanced between lines and trunks of a first telecommunication switching system via a central switch of the first telecommunication switching system and, when the central switch is unavailable,... | 07/24/1990 |
| 4937817 | Packet selection for packet distribution arrangements A packet distribution network including a distributed arrangement for selecting packets based on the availability or unavailability of packet destinations is disclosed. A plurality of input units receive and store packets before distribution. Each input u... | 06/26/1990 |
| 4932020 | Packet switching arrangement including packet retransmission A packet switching arrangement in which packet retransmission is provided by the network for packets found by the network to be unusable. A packet switch node is equipped with a packet path and a control signaling path cooperating with packet address rout... | 06/05/1990 |
| 4905231 | Multi-media virtual circuit A packet switch arrangement in which a first plurality of user devices is connected to a packet network by a first interface unit and a second plurality of user devices is connected to the packet network by a second interface unit. A virtual circuit is es... | 02/27/1990 |
| 4899335 | Self routing packet switching network architecture A network architecture of the sort-then-expand type for routing packets including destination information is disclosed. The network includes a distribution stage comprising a plurality of input sorts units, an intermediate stage comprising a plurality of ... | 02/06/1990 |
| 4787692 | Electro optical switch architectures Optical switch networks and the design rules for creating them are disclosed. The networks comprise a plurality of input and output stages of optical switch elements. Each input optical switch stage is comprised of a plurality of 1 by 2 optical switch ele... | 11/29/1988 |
| 4736364 | Switching system control arrangements Methods and arrangements for associating control messages received in the D-channel of an integrated services digital network (ISDN) line with the call control process to which the message relates are disclosed. With ISDN, a single control channel, called... | 04/05/1988 |
| 4730304 | Data base creation in stored program controlled switching systems A time division switching system for providing telecommunications connections as defined by information stored in a plurality of control memories is disclosed. The switching system includes arrangements for transferring a new control program from a centra... | 03/08/1988 |
| 4727538 | Information transfer method and arrangement A local area network comprising a plurality of terminals interconnected by a communication bus is disclosed. Each terminal comprises a memory, a main processor, and a co-processor. To transmit information in a communication mode, the main processor loads ... | 02/23/1988 |
| 4688214 | Switching system control arrangements Methods and arrangements for properly associating an alerting message from an ISDN user terminal with the control process associated with the message are disclosed. Each call, in a disclosed switching network, is associated with a call control process and... | 08/18/1987 |
| 4644568 | Timing signal distribution arrangement An arrangement for selectively connecting a first or a second frequency synchronous timing signal to an outgoing conductor is disclosed. When a transition from the first to the second timing signal occurs, the first timing signal is inhibited from being t... | 02/17/1987 |
| 4621357 | Time division switching system control arrangement and method A method and arrangement for controlling a time division switching system including a time multiplexed switch is disclosed. The time division switching system comprises a plurality of time-slot interchange units which connect subscriber sets to the input/... | 11/04/1986 |
| 4583218 | Control communication in a switching system having clustered remote switching modules An arrangement comprising a host switching system and a number of remote switching modules which are directly interconnected such that voice and data traffic as well as control information can be conveyed between modules without being routed through the h... | 04/15/1986 |
| 4550404 | Switching system having remote switching capability An arrangement comprising a host switching system and a number of remote switching modules which are directly interconnected such that voice and data traffic as well as control information can be conveyed between modules without being routed through the h... | 10/29/1985 |
| 4531110 | Negative temperature coefficient thermistors Inexpensive Mn or Mg ferrites may be used as negative temperature coefficient thermistors. Fabrication of devices with the desired high temperature coefficients is facilitated by a processing method which forms a thin layer of oxidized and high resistivit... | 07/23/1985 |
| 4530092 | Distributed switching system having multiple time slot interchanger nodes Communications between stations served by different time slot interchangers (TSI) nodes in a telecommunications network are made possible without the use of either an intermediate stage of time multiplex space division switching or central time slot alloc... | 07/16/1985 |
| 4530051 | Program process execution in a distributed multiprocessor system A method and apparatus for executing parts of a program process on two processors of a multiprocessor system. A home process resides in a home processor and is the destination process of all interprocess messages. The home process may call for the executi... | 07/16/1985 |
| 4520477 | Control information communication arrangement for a time division switching system A time division switching system having a time-space-time architecture is disclosed. The time-multiplexed communication links of this system comprise a plurality of channels certain of which are used to convey control information and the remaining ones of... | 05/28/1985 |
| 4511859 | Apparatus for generating a common output signal as a function of any of a plurality of diverse input signals A circuit for generating a common signal as a function of either of two reference signals comprises a pair of phase-locked loops which share an oscillator. Each phase-locked loop generates a control signal as a function of one of the reference signals. On... | 04/16/1985 |
| 4296492 | Continuity verification arrangement A time division switching system having distributed control processors is disclosed. The switching system includes time-slot interchange units having associated subscriber sets and a time-shared space division network for interconnecting the time-slot int... | 10/20/1981 |
| 4280217 | Time division switching system control arrangement A time division switching system having distributed control processors is disclosed. The distributed processors exchange control messages and cooperate in the completion of talking paths between subscribers. Each control message includes an address portio... | 07/21/1981 |
| 4206322 | Time-division switching system for multirate data A time-division switching system for switching data words from data word sources received in channels of a time-multiplex line where a first plurality of data word sources uses a channel only once every n channels and a second plurality of data word sourc... | 06/03/1980 |
| 4197430 | Operator service position system An arrangement and method for providing operator services to a plurality of subscribers wherein each subscriber is associated with one of a plurality of service acceptability times is disclosed. Service requests from the subscribers are stored when they a... | 04/08/1980 |
| 4183096 | Self checking dynamic memory system The storage space of the instant system is considered, for refresh purposes, to contain 512 groups of 26 bit digital words with each group containing 128 such words. Memory refresh is implemented by sequentially refreshing the groups of digital words at t... | 01/08/1980 |
| 4117263 | Announcement generating arrangement utilizing digitally stored speech representations Announcements for each subscriber are assembled specifically for that subscriber from speech segments stored in a digital memory. Each speech segment comprises a predetermined number of consecutive digital words stored in the digital memory and identified... | 09/26/1978 |
| 4074079 | Coin telephone antifraud system This invention relates to coin-operated telephones and apparatus for preventing the accidental or fraudulent simulation of coin deposit signals. At the beginning of each coin call or overtime period, a coding algorithm is randomly chosen at the coin stati... | 02/14/1978 |
| 4064370 | Time-division switching system A high-capacity low-blocking time-division switching system including a space-division switching network is disclosed for switching serial digital data words synchronously received on time multiplexed lines in a first code format wherein each data word oc... | 12/20/1977 |
| 4054754 | Arrangement for transmitting digital data and synchronizing information A high capacity time-division switching system is disclosed which includes a digital data transmission system for transmitting both digital data words and synchronizing information. The predetermined bit positions of each data word, which bit positions ar... | 10/18/1977 |
| 4035584 | Space division network for time-division switching systems A high-capacity, low-blocking time-division switching system including a three-stage space-division network is disclosed. In order to achieve high capacity and low blocking the space-division network is physically large resulting in delays of the Pulse Co... | 07/12/1977 |
