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This page displays all 「FI」 in main group H04Q1/00. |
HB:Handbook | ||||
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CC:Concordance | |||||
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Details of selecting apparatus or arrangements | HB | CC | 5K073 | |
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.Constructional details | HB | CC | 5K073 | |
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..Frames or mounting racks for selector switches; Accessories therefor, e.g. frame cover | HB | CC | 5K073 | |
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..Cable ducts or mountings specially adapted for exchange installations | HB | CC | 5K073 | |
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..Frames or mounting racks for relays; Accessories therefor | HB | CC | 5K073 | |
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..Exchange station construction | HB | CC | 5K073 | |
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..Arrangements of multiple bars with or without pivotable frames | HB | CC | 5K073 | |
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..Distribution frames | HB | CC | 5K073 | |
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..Wiring arrangements for selector switches or relays in frames | HB | CC | 5K073 | |
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.Electrical details | HB | CC | 5K055 | |
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..Testing circuits or apparatus; Circuits or apparatus for detecting, indicating, or signalling faults or troubles | HB | CC | 5K019 | |
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...Device for preventing malfunction; device for recovery to normal operation | HB | CC | 5K019 | |
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...Automatic arrangements | HB | CC | 5K019 | |
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....for connection devices | HB | CC | 5K019 | |
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....for signalling trouble in unoccupied sub-exchanges | HB | CC | 5K019 | |
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..Current-supply circuits or arrangements for selection equipment at exchanges | HB | CC | 5K055 | |
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..Signalling arrangements; Manipulation of signalling currents (multiplex systems providing for calling or supervisory signals H04J 1/14, H04J 3/12) | HB | CC | 5K064 | |
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Information transfer | HB | CC | 5K064 | |
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.Transfer confirmation | HB | CC | 5K064 | |
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.Transfer between in-office devices | HB | CC | 5K064 | |
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.Transfer between stations | HB | CC | 5K064 | |
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..Register sender | HB | CC | 5K064 | |
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..Switching control signal transmission | HB | CC | 5K064 | |
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..Special service signal transmission | HB | CC | 5K064 | |
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..Charging signal transmission | HB | CC | 5K064 | |
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Selective ringing | HB | CC | 5K064 | |
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Others | HB | CC | 5K064 | |
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...using trains of dc pulses (H04Q 1/39 takes precedence) [3] | HB | CC | 5K064 | |
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Generation and transmission | HB | CC | 5K064 | |
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Reception | HB | CC | 5K064 | |
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Repeating | HB | CC | 5K064 | |
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Others | HB | CC | 5K064 | |
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....Impulse regenerators with mechanical or other non-electrical marking arrangements | HB | CC | 5K064 | |
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....Pulse-correcting arrangements, e.g. for reducing effects due to interference | HB | CC | 5K064 | |
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...using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors | HB | CC | 5K064 | |
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...using coded pulse groups [3] | HB | CC | 5K064 | |
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...whereby duration of pulse or interval between two pulses is variable | HB | CC | 5K064 | |
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....involving the position of a pulse in a cycle | HB | CC | 5K064 | |
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...using ac (H04Q 1/50 takes precedence) [3] | HB | CC | 5K064 | |
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....with out-of-voice band signalling frequencies [3] | HB | CC | 5K064 | |
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....with voice-band signalling frequencies [3] | HB | CC | 5K064 | |
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.....using one signalling frequency (H04Q 1/46 takes precedence) [3] | HB | CC | 5K064 | |
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related to signal generation or transmission | HB | CC | 5K064 | |
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related to signal reception | HB | CC | 5K064 | |
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.using an analogue means | HB | CC | 5K064 | |
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Others | HB | CC | 5K064 | |
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......with conversion of a single frequency signal into a digital signal [3] | HB | CC | 5K064 | |
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.....using multi-frequency signalling (H04Q 1/46 takes precedence) [3] | HB | CC | 5K064 | |
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related to signal generation or transmission | HB | CC | 5K064 | |
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related to signal reception | HB | CC | 5K064 | |
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.using an analogue means | HB | CC | 5K064 | |
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Others | HB | CC | 5K064 | |
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......in which m-out-of-n signalling frequencies are transmitted [3] | HB | CC | 5K064 | |
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......with conversion of multi-frequency signals into digital signals [3] | HB | CC | 5K064 | |
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.....comprising means for distinguishing between a signalling current of predetermined frequency and a complex current containing that frequency, e.g. speech current [3] | HB | CC | 5K064 | |
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...Induced-current signalling arrangements | HB | CC | 5K064 | |
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...Conversion between different kinds of signals | HB | CC | 5K064 | |
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..Amplifier switched-on automatically in dependence on automatically selected lines | HB | CC | 5K050 | |
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..Balancing circuitry switched-on automatically in dependence on automatically selected lines | HB | CC | 5K050 | |