F-Term-List

H04Q3/52-3/52,101@Z;11/00-11/08

AA00
PURPOSE AND EFFECTS

AA01

AA02

AA03

AA04

AA05

AA06

AA08

AA10

. Improvement of call quality and transmission quality

. . Reduction of interference or crosstalk

. . Reduction of echo

. . Control or matching of impedance

. . Noise reduction

. . Prevention of deterioration of call quality by relay

. Improvement of connection quality

. Improvement of reliability and prevention of malfunction

AA11

AA13

AA15

AA16

AA17

AA18

. Assurance of sequencing

. Expansion, additional installations, and modification

. Increase of the speed of switches and reduction of the speed of the elements to be used

. Size reduction, modularization, and mounting a concentrated number of switches mounting

. Reduction of power consumption

. Shared use

BA00
EXCHANGE METHODS

BA01

BA02

BA03

BA04

BA05

BA06

BA07

BA08

BA09

BA10

. Space-division exchange methods

. Exchange methods involving time-division multiplexing

. . Exchange methods involving multiplexing at different speeds

. . . Multi-frame multiplexing

. . . Multi-slot multiplexing

. . . Speed equalization

. . . Speed restriction

. Exchange methods involving frequency-division multiplexing

. Exchange methods involving space-division multiplexing

. Asynchronous-transfer-mode (ATM) mechanisms

CA00
EXCHANGE NETWORKS

CA01

CA02

CA03

CA06

CA07

CA08

CA09

. Telephone networks

. Data networks

. Integrated services digital networks (ISDN)

. Loop networks

. . Synchronous loop networks

. Bus networks

. . Synchronous bus networks

CB00
STRUCTURAL ELEMENTS OF EXCHANGE NETWORKS

CB01

CB02

CB03

CB04

CB05

CB07

CB08

CB09

CB10

. Exchanges

. . Private-branch exchanges and push-button telephones

. Concentrators

. Carrier-terminal devices and line-termination devices

. Subscriber terminals

. Multiplex lines

. . Time-division multiplex lines

. . Frequency-ivision multiplex lines

. . Wavelength division multiplex lines

DA00
STRUCTURAL ELEMENTS OF EXCHANGES

DA01

DA02

DA03

DA04

DA05

DA06

DA07

DA08

DA10

. Control-system and auxiliary-system devices

. . Central control devices

. Signal-processing-system devices

. Call-channel-system devices

. . Call-channel networks

. . Line interfaces

. . . Subscriber lines

. . . Trunks

. Elements related to resonance transfer

DB00
SWITCHES AND CALL CHANNELS

DB01

DB02

DB03

DB04

DB05

DB07

DB09

. Space switches

. . Electronic switches

. . Mechanical contact switches

. . . Crossbar switches

. . . Step-by-step (S x S) switches

. . Matrix switches

. . Switch driving means and circuits (i.e., non-mechanical parts)

DB11

DB12

DB13

DB14

DB15

DB16

DB18

DB19

. Time switches

. . Call memory

. . . Multi-buffer memory

. . Control memory

. . Input-buffer memory

. . Output- buffer memory

. . Access means and methods for memory

. . . Memory access carried out in one frame or multiple frames

DB22

DB23

DB24

DB25

DB27

DB28

. . Time-slot-switching methods

. . . Random lead method

. . . Random light method

. . . Time-slot switching using space switches

. . Parallel processing

. . . Parallel processing of one time slot

DB31

DB32

DB33

DB34

DB35

DB36

. Light switches

. . Electrical switching

. . Switching of the light per se

. . . Mechanical switching

. . . . Mechanical switching that moves an optical waveguide

. . . . Mechanical switching that moves optical parts (e.g., mirrors)

DB41

DB43

DB45

. Self-routing switches

. Wide-band switches

. Switches for highway exchanges

DB51

DB52

DB53

DB54

DB55

DB56

DB57

DB58

DB59

DB60

. Structures and forms of call-channel networks

. . Linking structures

. . . Multi-stage linking

. . . . Time-space (TS) linking

. . . . Space-time (ST) linking

. . . . Time-space-time (TST) linking

. . . . Space-time-space (STS) linking

. . . Headbands

. . Loops

. . Buses

DB62

. . Multiple connections

DC00
Structure or mounting technology of switch

DC01

DC04

DC05

DC07

DC08

DC09

. Structure of mechanical switch

. Structure of semiconductor element

. . Arrangement of switch structural element on chip

. Arrangement on mounting

. . Arrangement on substrate

. . Relating to wiring

EA00
CIRCUITS AND PARTS

EA01

EA02

EA03

EA05

EA07

EA09

EA10

. Diodes

. Transistors

. Thyristors and PNPN elements

. Delay circuits and delay elements

. 1/N selectors

. Electromagnetic parts

. . Relays

EA11

EA12

EA13

EA14

EA16

EA18

EA19

EA20

. Memory

. . Simultaneous writing and reading

. . Latch circuits and registers

. . . Shift registers

. Logic-operation circuits and gate circuits

. Counters and counting circuits

. Multiple circuits and separation circuits

. Serial-to-parallel (S/P) and parallel-to-serial (P/S) transducers

EA21

EA22

EA23

EA24

EA25

EA26

EA27

EA28

EA29

EA30

. Circuits, elements, or components

. . Electrical-optical conversion means and optical-electrical conversion means

. . Optical ON-OFF means (e.g., liquid-crystal shutters)

. . Optical directional couplers and optical wavelength multiplexers

. . Wavelength selectors

. . Wavelength transducers

. . Optical parts (e.g., mirrors and lenses)

. . Optical amplifiers and optical attenuators

. . Optical waveguides

. . . Optical fibers

FA00
CONTROL AND FUNCTIONS

FA01

FA02

FA03

FA05

FA06

FA07

FA08

. Control forms

. . Wired-logic control

. . Stored-program control

. Control of distribution

. . Function distribution

. . Block distribution

. . Layer control

FA11

FA12

FA13

FA15

FA16

. Transmission between intra-office devices

. . Transmission using direct-memory access (DMA)

. . Transmission through calling channels

. . Transmission using time-division multiplex frames

. . . Transmissions using multiframes

FA21

FA22

FA23

FA24

FA26

FA27

FA28

FA29

. Control content and objects to be controlled

. . Remote exchange

. . Detours or bypasses

. . Update of translation or translation data

. . Calling-channel control

. . . Prevention of overlapping selection

. . . Intra-group connections

. . . Rearrangement

FB00
SPECIAL SERVICES

FB01

FB02

FB03

FB04

FB05

FB07

FB09

. Conferences

. . Services using adders

. . Services using OR-logics

. . . Services using wired OR-circuits

. . Zero-stuffing

. Voice transmission to multiple addresses

. Interruption

FC00
CALL-SIGNAL FORMS AND PROCESSING

FC01

FC02

FC03

FC04

FC06

FC07

FC08

FC09

. Analog signals

. Digital signals

. . Pulse-control modulation (PCM) signals

. . . Adaptive-differential pulse-control modulation (ADPCM)

. Conversion of the coding form of call signals

. . Compression

. . Conversion of synchronous methods

. . Mixing of call signals of different forms

FC11

FC12

FC13

FC16

FC17

FC18

FC19

FC20

. Voice packets

. . Prevention of silences

. . Prevention of delay variations

. Mixture of voice and data signals

. . Exchange with voice and data signals mixed

. . Separate exchange of voice and data signals

. . Differing synchronous methods for exchange of data and voice signals

. . Voice modes and data modes that can be switched

FD00
SIGNALING METHODS

FD01

FD02

FD03

FD04

FD06

FD07

FD08

. Transmission and reception of signals

. . Signal generation, signal transmission, and signal transmitters

. . Signal reception, signal detection, and signal receivers

. . Signal conversion

. . Insertion or branching of control signals (i.e., control channels)

. . . Separation

. . . Insertion or branching of control signals through call channels

FD11

FD12

FD13

FD14

FD15

FD16

FD17

FD18

FD19

FD20

. Signal meaning, signal types, and signal forms

. . Observation signals

. . Selection signals, terminal-identification signals, and subscriber-identification signals

. . Audible signals and call signals

. . Direct-current signals

. . Alternating-urgent signals

. . Signals using time-division multiplex frames

. . . Multiframe signals

. Subscriber-line signaling methods

. . Frame conversion

GA00
SYNCHRONIZATION

GA01

GA02

GA03

GA04

GA05

GA06

GA08

GA10

. Network synchronization

. . Slave synchronization

. . . Route selection

. . Mutual synchronization

. . Independent synchronization

. . Variable synchronization methods

. Station synchronization

. Station transmission-line interfaces

GA11

GA12

GA13

. Measures to prevent jitters

. Bit synchronization

. Frame synchronization

HA00
TESTING, MEASURES TO PREVENT FAULTS, AND MAINTENANCE OPERATION TECHNIQUES

HA01

HA02

HA03

HA05

HA07

HA08

HA09

. Monitoring for faults

. . Use of synchronized signals

. . Use of clocks

. Protection of memory contents

. Redundant construction

. . Redundancy of call channels

. . Doubly redundant construction

5K069	Use of switch circuits for exchanges and methods of control of multiplex exchanges
	H04Q3/52 -3/52,101@Z;11/00-11/08