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H04Q 1/00
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SELECTING - Details of selecting apparatus or arrangements |
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H04Q 1/02
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Constructional details |
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H04Q 1/04
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Frames or mounting racks for selector switches; Accessories therefor, e.g. frame cover |
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H04Q 1/06
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Cable ducts or mountings specially adapted for exchange installations |
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H04Q 1/08
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Frames or mounting racks for relays; Accessories therefor |
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H04Q 1/10
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Exchange station construction |
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H04Q 1/12
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Arrangements of multiple bars with or without pivotable frames |
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H04Q 1/14
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Distribution frames |
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H04Q 1/16
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Wiring arrangements for selector switches or relays in frames |
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H04Q 1/18
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Electrical details |
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H04Q 1/20
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Testing circuits or apparatus; Circuits or apparatus for detecting, indicating, or signalling faults or troubles |
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H04Q 1/22
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Automatic arrangements |
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H04Q 1/24
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Automatic arrangements for connection devices |
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H04Q 1/26
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Automatic arrangements for signalling trouble in unoccupied sub-exchanges |
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H04Q 1/28
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Current-supply circuits or arrangements for selection equipment at exchanges |
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H04Q 1/30
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Signalling arrangements; Manipulation of signalling currents |
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H04Q 1/32
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Signalling arrangements; Manipulation of signalling currents using trains of dc pulses |
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H04Q 1/34
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Impulse regenerators with mechanical or other non-electrical marking arrangements |
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H04Q 1/36
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Pulse-correcting arrangements, e.g. for reducing effects due to interference |
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H04Q 1/38
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Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors |
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H04Q 1/39
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Signalling arrangements; Manipulation of signalling currents using coded pulse groups |
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H04Q 1/40
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Signalling arrangements; Manipulation of signalling currents whereby duration of pulse or interval between two pulses is variable |
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H04Q 1/42
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Signalling arrangements; Manipulation of signalling currents whereby duration of pulse or interval between two pulses is variable involving the position of a pulse in a cycle |
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H04Q 1/44
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Signalling arrangements; Manipulation of signalling currents using ac |
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H04Q 1/45
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Signalling arrangements; Manipulation of signalling currents using ac with voice-band signalling frequencies using multi-frequency signalling |
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H04Q 1/46
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Signalling arrangements; Manipulation of signalling currents using ac with voice-band signalling frequencies comprising means for distinguishing between a signalling current of predetermined frequency and a complex current containing that frequency, e.g. speech current |
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H04Q 1/48
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Induced-current signalling arrangements |
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H04Q 1/50
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Conversion between different kinds of signals |
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H04Q 1/54
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Amplifier switched-on automatically in dependence on automatically selected lines |
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H04Q 1/56
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Balancing circuitry switched-on automatically in dependence on automatically selected lines |
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H04Q 1/442
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Signalling arrangements; Manipulation of signalling currents using ac with out-of-voice band signalling frequencies |
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H04Q 1/444
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Signalling arrangements; Manipulation of signalling currents using ac with voice-band signalling frequencies |
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H04Q 1/446
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Signalling arrangements; Manipulation of signalling currents using ac with voice-band signalling frequencies using one signalling frequency |
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H04Q 1/448
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Signalling arrangements; Manipulation of signalling currents using ac with voice-band signalling frequencies using one signalling frequency with conversion of a single frequency signal into a digital signal |
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H04Q 1/453
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Signalling arrangements; Manipulation of signalling currents using ac with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted |
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H04Q 1/457
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Signalling arrangements; Manipulation of signalling currents using ac with voice-band signalling frequencies using multi-frequency signalling with conversion of multi-frequency signals into digital signals |
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H04Q 3/00
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Selecting arrangements |
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H04Q 3/02
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Circuit arrangements for selectors responsive to a permutation code |
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H04Q 3/04
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Circuit arrangements for receivers of routing digits |
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H04Q 3/06
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Circuit arrangements for receivers of routing digits for group or trunk group selectors |
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H04Q 3/08
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Circuit arrangements for receivers of routing digits for local or long-distance selectors |
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H04Q 3/10
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Circuit arrangements for receivers of routing digits for PBX selectors, i.e. private branch exchange selectors |
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H04Q 3/12
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Circuit arrangements for receivers of routing digits for line selectors providing transfer of routing digits |
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H04Q 3/14
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Circuit arrangements for receivers of routing digits for two-way operation selectors |
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H04Q 3/16
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Circuit arrangements for receivers of routing digits for marking-switches |
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H04Q 3/18
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Circuit arrangements for first stage of hunting switching |
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H04Q 3/20
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Circuit arrangements for first stage of hunting switching for preselectors |
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H04Q 3/22
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Circuit arrangements for first stage of hunting switching for preselectors comprising common calling and disconnecting circuit |
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H04Q 3/24
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Circuit arrangements for first stage of hunting switching for line finders |
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H04Q 3/26
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Circuit arrangements for first stage of hunting switching for line finders comprising common calling and disconnecting circuit |
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H04Q 3/28
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Circuit arrangements for first stage of hunting switching for line finders comprising main groups and subgroups |
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H04Q 3/30
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Selector finders, i.e. allotters |
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H04Q 3/32
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Circuit arrangements for second or subsequent stages of hunting switching |
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H04Q 3/34
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Circuit arrangements for second or subsequent stages of hunting switching for the second preselection stage |
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H04Q 3/36
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Circuit arrangements for second or subsequent stages of hunting switching for the second line-finder stage |
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H04Q 3/38
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Circuit arrangements for second or subsequent stages of hunting switching for stages after the group-selector stage |
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H04Q 3/40
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Circuit arrangements for second or subsequent stages of hunting switching for stages after the line selector, e.g. for extension selector |
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H04Q 3/42
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Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker |
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H04Q 3/44
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Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using revertive control |
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H04Q 3/46
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Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using signals other than revertive impulses |
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H04Q 3/47
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Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using translators |
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H04Q 3/48
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Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using markers |
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H04Q 3/49
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Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using markers for end-to-end marking |
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H04Q 3/52
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Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements |
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H04Q 3/54
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Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised |
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H04Q 3/55
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Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised using wired logic circuitry |
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H04Q 3/56
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Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the control signals are multiplexed |
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H04Q 3/58
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Arrangements providing connection between main exchange and sub-exchange or satellite |
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H04Q 3/60
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Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to satellites or concentrators which connect one or more exchange lines with a group of local lines |
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H04Q 3/62
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Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges |
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H04Q 3/64
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Distributing or queuing |
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H04Q 3/66
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Traffic distributors |
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H04Q 3/68
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Grouping or interlacing selector groups or stages |
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H04Q 3/70
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Identification of class of calling subscriber |
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H04Q 3/72
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Finding out and indicating number of calling subscriber |
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H04Q 3/74
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Identification of subscriber calling from a party-line |
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H04Q 3/76
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Translation from the called subscriber's number to the outgoing or incoming control information |
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H04Q 3/78
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Temporary storage of information of calling or called subscriber |
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H04Q 3/495
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Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using markers for routing connecting paths |
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H04Q 3/545
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Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised using a stored programme |
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H04Q 3/555
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Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised using wired logic circuitry being comprised by electro-magnetic devices |
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H04Q 5/00
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Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange |
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H04Q 5/02
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Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with direct connection for all subscribers, i.e. party-line system |
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H04Q 5/04
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Signalling by currents in one or other or both line wires or additional wires |
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H04Q 5/06
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Signalling by amplitude or polarity of dc |
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H04Q 5/08
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Signalling by continuous ac |
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H04Q 5/10
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Signalling by continuous ac using single frequencies for different subscribers |
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H04Q 5/12
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Signalling by continuous ac using combinations of frequencies |
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H04Q 5/14
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Signalling by pulses |
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H04Q 5/16
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Signalling by pulses by predetermined number of pulses |
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H04Q 5/18
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Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with indirect connection, i.e. through subordinate switching centre |
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H04Q 5/20
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Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with indirect connection, i.e. through subordinate switching centre the subordinate centre permitting interconnection of subscribers connected thereto |
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H04Q 5/22
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Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with indirect connection, i.e. through subordinate switching centre the subordinate centre not permitting interconnection of subscribers connected thereto |
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H04Q 5/24
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Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange for two-party-line systems |
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H04Q 9/00
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Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom |
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H04Q 9/02
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Automatically-operated arrangements |
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H04Q 9/04
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Arrangements for synchronous operation |
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H04Q 9/06
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Calling by using amplitude or polarity of dc |
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H04Q 9/08
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Calling by using continuous ac |
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H04Q 9/10
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Calling by using continuous ac using single different frequencies |
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H04Q 9/12
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Calling by using continuous ac using combinations of frequencies |
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H04Q 9/14
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Calling by using pulses |
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H04Q 9/16
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Calling by using pulses by predetermined number of pulses |
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H04Q 11/00
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Selecting arrangements for multiplex systems |
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H04Q 11/02
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Selecting arrangements for multiplex systems for frequency-division multiplexing |
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H04Q 11/04
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Selecting arrangements for multiplex systems for time-division multiplexing |
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H04Q 11/06
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Time-space-time switching |
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H04Q 11/08
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Time only switching |
