| ReturnTo Theme-Group-Choice | Onelevelup |
| 5K073 | STRUCTURE OF TELEPHONE EXCHANGES | |
| H04Q1/00 -1/16 | ||
| H04Q1/00-1/16 | AA | AA00 PURPOSE OR EFFECT |
AA01 | AA02 | AA03 | AA04 | AA05 | AA06 | AA07 | AA08 | ||
| . Miniaturisation | . facilitating assembly | . facilitating wiring layout | . Expanding and changing | . . of racks | . . of electrical connections | . facilitating maintenance | . Measures against electromagnetic/electrostatic induction | |||||
| CC | CC00 STRUCTURE |
CC01 | CC02 | CC03 | CC04 | CC05 | CC06 | CC08 | ||||
| . Shapes of racks | . . Parallel installation | . . movable racks | . . . Movable racks | . . . Rotary racks | . Box shapes i.e. cabinets | . portable | ||||||
| CC11 | CC12 | CC13 | ||||||||||
| . Switchboards | . . Stationary | . . Desktop types | ||||||||||
| CC21 | CC22 | CC23 | CC24 | CC25 | CC26 | CC27 | CC28 | |||||
| . Structural details | . . Poles or frameworks | . . . Reinforcements | . . . Channel bases | . . Plates | . . . Operation panels | . . . Side and rear panels or covers | . . . Doors | |||||
| CC31 | CC32 | CC33 | CC35 | CC36 | CC37 | CC38 | ||||||
| . . Mechanical protection | . . . airtight e.g. waterproofing or dust prevention | . . . Heat radiation or cooling | . . Structures for mounting electric components including optical components | . . . Metal fixtures or supports | . . . Shelves or slide shelves | . . . . Slide shelves including shelves for printed circuit boards | ||||||
| CC41 | CC42 | CC43 | CC44 | CC45 | ||||||||
| . . Structures for wiring layouts | . . . Grooves i.e. cable ducts | . . . Guides or cable forming pieces | . . . Cable support and fixing sections | . . . Cable inlets | ||||||||
| CC51 | CC52 | CC53 | CC54 | CC55 | CC56 | CC57 | CC58 | |||||
| . Assembling or installing | . . assembling racks | . . . Metal fixtures for connecting | . . . assembling racks and plates | . . Combination or arrangement of racks | . . installing on the floor | . . . earthquake-resistant | . . mounting on wall or ceiling | |||||
| EE | EE00 MAIN DISTRIBUTING FRAME (MDF) |
EE01 | EE02 | EE05 | EE06 | |||||||
| . automatic or semi-automatic | . manual | . of rack structures | . . Multi-function racks | |||||||||
| GG | GG00 MOUNTING ELECTRIC COMPONENT INCLUDING OPTICAL COMPONENT |
GG01 | GG02 | GG03 | GG07 | GG08 | GG09 | |||||
| . Connecting components | . . Terminal boards | . . Male and female connectors | . Electronic component units | . Printed circuit boards | . . Ceramic boards | |||||||
| GG11 | GG12 | GG13 | ||||||||||
| . Switches | . . Mechanical switches | . . Semiconductor switches | ||||||||||
| GG21 | GG22 | GG23 | GG24 | GG25 | GG26 | GG27 | ||||||
| . Protective components | . . Electrical protection | . . . Overvoltage e.g. arresters | . . . . of semiconductors | . . . Overcurrent e.g. fuses | . . Alarms and indication | . . Grounding | ||||||
| JJ | JJ00 WIRING LAYOUT INCLUDING OPTICAL FIBRE LAYOUT |
JJ01 | JJ02 | JJ03 | JJ05 | JJ06 | JJ07 | JJ08 | JJ09 | JJ10 | ||
| . Wiring layouts inside racks | . Wiring layouts between racks or between racks and other devices | . Wiring layouts inside components or component units | . Electrical connecting sections | . . Soldering | . . Wrapping | . . Crimping | . . U-shaped slits | . . Screw connections | ||||
| JJ11 | JJ12 | JJ13 | JJ14 | JJ15 | JJ16 | JJ17 | ||||||
| . Wires or cables | . . Bundled wires | . . Flat cables | . . Jumper wires | . . Cables with connectors | . . Cable terminals | . . Optical fibres | ||||||
| JJ21 | JJ22 | JJ23 | JJ25 | JJ26 | ||||||||
| . Power supply | . . Power-supply cables | . . Electric power plates | . Wiring routes | . . Cable racks | ||||||||
| LL | LL00 MAINTENANCE AND INSPECTION |
LL01 | LL02 | LL03 | ||||||||
| . Isolation unit including test springs | . Isolator i.e. spring plugs | . Tools or jigs for maintenance |