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  • H04Q3/00
    		•  Selecting arrangements (H04Q 5/00-H04Q 11/00 take precedence) HB CC 5K055
  • H04Q3/00,101
    		•  .Selection and layout configured with a combination of circuits from 3/02 to 3/40 HB CC 5K055
  • H04Q3/02
    		•  .Circuit arrangements for selectors responsive to a permutation code HB CC 5K055
  • H04Q3/04
    		•  .Circuit arrangements for receivers of routing digits HB CC 5K055
  • H04Q3/06
    		•  ..for group or trunk group selectors HB CC 5K055
  • H04Q3/08
    		•  ..for local or long-distance selectors HB CC 5K055
  • H04Q3/10
    		•  ..for PBX selectors, i.e. private branch exchange selectors HB CC 5K055
  • H04Q3/12
    		•  ..for line selectors providing transfer of routing digits HB CC 5K055
  • H04Q3/14
    		•  ..for two-way operation selectors HB CC 5K055
  • H04Q3/16
    		•  ..for marking-switches HB CC 5K055
  • H04Q3/18
    		•  .Circuit arrangements for first stage of hunting switching HB CC 5K055
  • H04Q3/20
    		•  ..for preselectors HB CC 5K055
  • H04Q3/22
    		•  ...comprising common calling and disconnecting circuit HB CC 5K055
  • H04Q3/24
    		•  ..for line finders HB CC 5K055
  • H04Q3/26
    		•  ...comprising common calling and disconnecting circuit HB CC 5K055
  • H04Q3/28
    		•  ...comprising main groups and subgroups HB CC 5K055
  • H04Q3/30
    		•  ..Selector finders, i.e. allotters HB CC 5K055
  • H04Q3/32
    		•  .Circuit arrangements for second or subsequent stages of hunting switching [2] HB CC 5K055
  • H04Q3/34
    		•  ..for the second preselection stage HB CC 5K055
  • H04Q3/36
    		•  ..for the second line-finder stage HB CC 5K055
  • H04Q3/38
    		•  ..for stages after the group-selector stage HB CC 5K055
  • H04Q3/40
    		•  ..for stages after the line selector, e.g. for extension selector HB CC 5K055
  • H04Q3/42
    		•  .Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker HB CC 5K050
  • H04Q3/42,101
    		•  ..Partial circuit required to configure the circuit layout for indirect selection HB CC 5K050
  • H04Q3/42,104
    		•  ..Circuit device for interfacing the line HB CC 5K050
  • H04Q3/42,105
    		•  ...Outgoing/incoming trunk circuit device HB CC 5K050
  • H04Q3/42,105@A
    		•  Outgoing trunk HB CC 5K050
  • H04Q3/42,105@B
    		•  Incoming trunk HB CC 5K050
  • H04Q3/42,105@C
    		•  Bi-directional trunk HB CC 5K050
  • H04Q3/42,105@Z
    		•  Others HB CC 5K050
  • H04Q3/42,106
    		•  ...Intra-office trunk circuit device HB CC 5K050
  • H04Q3/42,107
    		•  ...Special trunk circuit device HB CC 5K050
  • H04Q3/44
    		•  ..using revertive control HB CC 5K055
  • H04Q3/46
    		•  ..using signals other than revertive impulses HB CC 5K055
  • H04Q3/47
    		•  ..using translators HB CC 5K055
  • H04Q3/48
    		•  ..using markers HB CC 5K055
  • H04Q3/49
    		•  ...for end-to-end marking HB CC 5K055
  • H04Q3/495
    		•  ...for routing connecting paths HB CC 5K055
  • H04Q3/52
    		•  ..using static devices in switching stages, e.g. electronic switching arrangements [2] HB CC 5K069
  • H04Q3/52@A
    		•  Space switch HB CC 5K069
  • H04Q3/52@B
    		•  .Optical space switch HB CC 5K069
  • H04Q3/52@C
    		•  Wave length multiple switch HB CC 5K069
  • H04Q3/52@Z
    		•  Others HB CC 5K069
  • H04Q3/52,101
    		•  ...Change-over stage that is activated by time divided multiplexing HB CC 5K069
  • H04Q3/52,101@A
    		•  Time switch HB CC 5K069
  • H04Q3/52,101@B
    		•  .Optical time switch HB CC 5K069
  • H04Q3/52,101@Z
    		•  Others HB CC 5K069
  • H04Q3/54
    		•  ..in which the logic circuitry controlling the exchange is centralised HB CC 5K026
  • H04Q3/545
    		•  ...using a stored programme [4] HB CC 5K026
  • H04Q3/55
    		•  ...using wired logic circuitry [4] HB CC 5K026
  • H04Q3/555
    		•  ....being comprised by electro-magnetic devices [4] HB CC 5K026
  • H04Q3/56
    		•  ..in which the control signals are multiplexed [2] HB CC 5K026
  • H04Q3/58
    		•  .Arrangements providing connection between main exchange and sub-exchange or satellite HB CC 5K049
  • H04Q3/58,101
    		•  ..Circuit layout peculiar to the private branch exchange HB CC 5K049
  • H04Q3/58,102
    		•  ...Circuit layout for night-time change-over HB CC 5K049
  • H04Q3/58,103
    		•  ...Circuit layout for distributed repeater connection HB CC 5K049
  • H04Q3/58,104
    		•  ...Circuit layout for collision prevention HB CC 5K049
  • H04Q3/58,105
    		•  ...Circuit layout for dial-in connection HB CC 5K049
  • H04Q3/58,106
    		•  ...Circuit layout for origination/termination control HB CC 5K049
  • H04Q3/58,107
    		•  ...Circuit layout for the key telephone HB CC 5K049
  • H04Q3/60
    		•  ..for connecting to satellites or concentrators which connect one or more exchange lines with a group of local lines HB CC 5K049
  • H04Q3/62
    		•  ..for connecting to private branch exchanges HB CC 5K049
  • H04Q3/64
    		•  .Distributing or queuing HB CC 5K065
  • H04Q3/64,101
    		•  ..Electromagnetic coordinate switch used for the change-over stage HB CC 5K065
  • H04Q3/66
    		•  ..Traffic distributors HB CC 5K065
  • H04Q3/68
    		•  ..Grouping or interlacing selector groups or stages HB CC 5K065
  • H04Q3/70
    		•  .Identification of class of calling subscriber HB CC 5K050
  • H04Q3/72
    		•  .Finding out and indicating number of calling subscriber HB CC 5K050
  • H04Q3/72,101
    		•  ..Scan for state detection HB CC 5K050
  • H04Q3/74
    		•  ..Identification of subscriber calling from a party-line HB CC 5K050
  • H04Q3/76
    		•  .Translation from the called subscriber's number to the outgoing or incoming control information [4] HB CC 5K065
  • H04Q3/78
    		•  .Temporary storage of information of calling or called subscriber (intermediate storage means for telegraphic communication H04L 13/08) [4] HB CC 5K065
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