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SELECTING (switches, relays, selectors H01H; electronic switches H03K 17/00)
Definition statement
This subclass/group covers:

Methods, circuits, or apparatus for selectively establishing a connection between a desired number of stations (normally two), or between a main station and a desired number of substations (normally one) for the purpose of transferring information via this connection after it has been established; and

Selective calling arrangements over connections already established.

As the scope of H04Q covers a diversity of subject matter, the user is referred to the IPC definitions for the main groups of H04Q.

The following list is intended to assist the user:

  • Details of selecting apparatus arrangements, see definition for group H04Q 1/00.
  • Selecting arrangements, see definition for group H04Q 3/00.
  • For subscriber stations connected by the same line to the exchange, see definition for group H04Q 5/00.
  • Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, see definition for H04Q 9/00.
  • Selecting arrangements for multiplex systems, see definition for group H04Q 11/00.
References relevant to classification in this subclass
This subclass/group does not cover:
Electric switches; Relays; Selectors
Multiplex communication
Wireless communication networks
Informative references
Attention is drawn to the following places, which may be of interest for search:
Cables; Conductors
Installation of communication cables or lines
Electronic switches
Transmission in general
Broadcast communication
Transmission of digital information
Telephonic communication
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Satellite
A kind of exchange the operation of which depends upon control signals received from a supervisory exchange.
Subscriber
General term for terminal equipment, e.g. telephone for public use.
Substation
Subscriber or monitoring equipment which may connect a single subscriber to a line without choice as to subscriber.
Switching centres
Include exchanges and satellites.
Details of selecting apparatus or arrangements { for establishing connections among stations for the purpose of transferring information via these connections}
Definition statement
This subclass/group covers:
  • Constructional details of selecting apparatuses or arrangements, especially and only used for telecommunications applications. Examples of such arrangements are frames, mounting racks. Examples of such details are doors, panels, pivoting parts;
  • Distribution frames, provided or not with patch panels and terminal blocks;
  • Methods for detection and sensing of connection of patch cables into patch panels;
  • Details of cabling management for the above mentioned arrangements;
  • Devices used as interface to network subscribers;
  • Electrical details of selecting apparatuses, such as testing circuits for telephone line or subscriber line and arrangements for signalling troubles in unoccupied sub exchanges.
References relevant to classification in this group
This subclass/group does not cover:
Constructional details common to different types of electric apparatus
Informative references
Attention is drawn to the following places, which may be of interest for search:
Details of coupling devices
Frameworks, boards, panels, desks, casings
Distribution frames-cassettes
Distribution frames char. by the way of extraction or insertion of the cassette: pivoting, sliding, rotating
Method or arrangements for sensing record carriers
Record carriers for use with machines and with at least a part designed to carry digital markings
Special locks for drawers
Terminal blocks providing connection to wires or cables
Means for guiding or retaining wires or cables connected to terminal blocks
Enclosures
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Patch panels
panel, typically rack mounted, that houses cable connections.
Distribution frame
passive device which terminates cables, allowing arbitrary interconnections to be made
Synonyms and Keywords

In patent documents the following abbreviations are often used:

IDC
means two-dimensional
MDF
main distribution frame
RFID
radio frequency identification
DSLAM
digital subscriber line access multiplexer
FTT+
fiber to the +
MDU
main distribution unit
FDT
fiber drop terminal
Current-supply circuits or arrangements for selection equipment at exchanges
Definition statement
This subclass/group covers:

This is a subgroup of H04Q 1/18 for electrical details of selecting apparatus or arrangements. Its scope is clear from the title. It is basically for consultation only as it is little used nowadays.

Relationship between large subject matter areas

Testing circuits are covered by H04Q 1/20.

Signalling circuits are covered by H04Q 1/30.

References relevant to classification in this group
This subclass/group does not cover:
Current supply arrangements over Ethernet
Current supply arrangements for telephone systems
Generation of signalling current at the telephone sub station
Informative references
Attention is drawn to the following places, which may be of interest for search:
Power supply means for computers
Systems for transmission via power distribution lines
Subscriber line interface circuits (SLIC)
Over voltage protection in line interface circuits
Subscriber line supervision circuits e.g. off hook detection
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
BORSCHT
Battery, Over voltage, Ringing, Signalling, Coding, Hybrid, Testing
SLIC
Subscriber Line Interface Circuit
CPE
Customer Premise Equipment: any phone equipment (key systems, PBX’s, answering machines, etc.) which reside on the customers premises
DTMF
Dual Tone Multi Frequency
Signalling arrangements; Manipulation of signalling currents (multiplex systems providing for calling or supervisory signals H04J 1/14, H04Q 3/12; telephone substation equipment H04M 1/00)
Definition statement
This subclass/group covers:

This is a subgroup of H04Q 1/18 for electrical details of selecting apparatus or arrangements. It covers arrangements for providing signalling currents to telephone substations from Central Office Exchange.

This group covers the arrangements at the exchanger for providing signalling current to substation. A SLIC should provide the so called BORSCHT (Battery, Over voltage, Ringing, Signalling, Coding, Hybrid, Testing) functions: this group covers the "S" function. SLIC in general covered by H04M 3/005.Over voltage covered by H04M 3/18. Off hook detection covered by H04M 3/2272

Subgroups H04Q 1/32 - H04Q 1/50 define the type of signalling involved. Their scope is clear from the title and nevertheless are nowadays very little used. The only relevant subgroup still active is H04Q 1/4575 that covers DTMF signalling.

Relationship between large subject matter areas

If the current supply refer to the selecting equipment part of the exchange then this aspect is covered by H04Q 1/28. Testing circuits are covered by H04Q 1/20.

References relevant to classification in this group
This subclass/group does not cover:
Telephone substation equipment
Current supply arrangements over Ethernet
Current supply arrangements for telephone systems
Generation of signalling current at the telephone sub station
Informative references
Attention is drawn to the following places, which may be of interest for search:
Power supply means for computers
Systems for transmission via power distribution lines
Subscriber line interface circuits (SLIC)
Over voltage protection in line interface circuits
Subscriber line supervision circuits e.g. off hook detection
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
BORSCHT
Battery, Over voltage, Ringing, Signalling, Coding, Hybrid, Testing
SLIC
Subscriber Line Interface Circuit
CPE
Customer Premise Equipment: any phone equipment (key systems, PBX’s, answering machines, etc.) which reside on the customers premises
DTMF
Dual Tone Multi Frequency
Amplifier switched-on automatically in dependence on automatically-selected lines
Definition statement
This subclass/group covers:

This is a subgroup of H04Q 1/18 for electrical details of selecting apparatus or arrangements. Its scope is clear from the title. It is basically for consultation only as it is little used nowadays.

Relationship between large subject matter areas

Testing circuits are covered by H04Q 1/20.

Signalling circuits are covered by H04Q 1/30.

References relevant to classification in this group
This subclass/group does not cover:
Current supply arrangements over Ethernet
Current supply arrangements for telephone systems
Generation of signalling current at the telephone sub station
Informative references
Attention is drawn to the following places, which may be of interest for search:
Power supply means for computers
Systems for transmission via power distribution lines
Subscriber line interface circuits (SLIC)
Over voltage protection in line interface circuits
Subscriber line supervision circuits e.g. off hook detection
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
BORSCHT
Battery, Over voltage, Ringing, Signalling, Coding, Hybrid, Testing
SLIC
Subscriber Line Interface Circuit
CPE
Customer Premise Equipment:any phone equipment (key systems, PBX’s, answering machines, etc.) which reside on the customers premises
DTMF
Dual Tone Multi Frequency
Balancing circuitry switched-on automatically in dependence on automatically-selected lines
Definition statement
This subclass/group covers:

This is a subgroup of H04Q 1/18 for electrical details of selecting apparatus or arrangements. Its scope is clear from the title. It is basically for consultation only as it is little used nowadays.

Relationship between large subject matter areas

Testing circuits are covered by H04Q 1/20.

Signalling circuits are covered by H04Q 1/30.

References relevant to classification in this group
This subclass/group does not cover:
Current supply arrangements over Ethernet
Current supply arrangements for telephone systems
Generation of signalling current at the telephone sub station
Informative references
Attention is drawn to the following places, which may be of interest for search:
Power supply means for computers
Systems for transmission via power distribution lines
Subscriber line interface circuits (SLIC)
Over voltage protection in line interface circuits
Subscriber line supervision circuits e.g. off hook detection
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
BORSCHT
Battery, Over voltage, Ringing, Signalling, Coding, Hybrid, Testing
SLIC
Subscriber Line Interface Circuit
CPE
Customer Premise Equipment:any phone equipment (key systems, PBX’s, answering machines, etc.) which reside on the customers premises
DTMF
Dual Tone Multi Frequency
Selecting arrangements (H04Q 5/00 to H04Q 11/00 take precedence)
Definition statement
This subclass/group covers:

Selecting arrangements to which subscribers are connected via wired circuit-based links.

Relationship between large subject matter areas

Switches, relays, selectors are classified in H01H. Electronic switches are classified in H03K 17/00.

References relevant to classification in this group
This subclass/group does not cover:
Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
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
Selecting arrangements for multiplex systems
Wireless communications networks
Multiplex communication
Special rules of classification within this group

In groups H04Q 3/0016 - H04Q 3/0095 classification using H04Q 3/00 CPC symbols only. In all other groups CPC symbols of H04Q213/13XXX) are used for additional information.

Groups H04Q 3/02 - H04Q 3/495 corresponds to old technology into which no further documents are to be classified.

Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Narrowband
Transmission of up to 2 Mbps
Broadband
Transmission above 2 Mbps
{Optical switching systems}
Definition statement
This subclass/group covers:

This group is no longer in use to classify new documents.

References relevant to classification in this group
This subclass/group does not cover:
Optical cross connects, their architectures, operation, maintenance and control, as well as their optical buffering and optical signal processing means.
Optical coupling means having switching means.
Physical details of controlling the light using movable of deformable optical means.
Physical details of light controlling devices.
Informative references
Attention is drawn to the following places, which may be of interest for search:
Optical cross connects, their architectures, operation, maintenance and control, as well as their optical buffering and optical signal processing means.
{Details}
Definition statement
This subclass/group covers:

This group is no longer in use to classify new documents.

Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
DC
direct current
AC
alternating current
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
Definition statement
This subclass/group covers:

Monitoring/supervising of remote device/systems.

Collecting data from sensors

Apparatus comprising RFID in combination with sensors.

References relevant to classification in this group
This subclass/group does not cover:
Transmission systems for measured values, control or similar signal (Remote control)
Mechanical means for transferring the output of a sensing member (sensor itself)
Electric program-control systems (Factory/installation-sensors connected to control centers via databus)
Record carriers for use with machines - Constructional details - for no contact communication (RFID)
Tariff metering apparatus -Remote reading of utility meter
Indicating or recording devices
Indicating or measuring liquid level - Particular electronic circuits for digital processing equipment
Informative references
Attention is drawn to the following places, which may be of interest for search:
Detecting, measuring or recording for diagnostic purposes
Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature - transmitting signals from a wheel unit to a vehicle mounted receiver
Electric circuits specially adapted for vehicles, not otherwise provided for
Applications of remote control devices for cranes
Electric permutation locks
Electric programme-control systems
Input and output arrangements for digital data processing
Individual entry or exit registers
Registering or indicating the working of vehicles - communicating information to a remotely located station
Home automation networks
Transmission control procedure - sensor networks
Telephonic communication systems adapted for combination with other electrical systems
Power saving arrangements
Network topologies - Sensor networks
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
RFID
Radio Frequency IDentification
Selecting arrangements for multiplex systems (multiplex systems H04J)
Relationship between large subject matter areas

Switches, relays, selectors are classified in H01H. Electronic switches are classified in H03K 17/00.

References relevant to classification in this group
This subclass/group does not cover:
Wireless communications networks
Multiplex communication
Special rules of classification within this group

In groups H04Q 11/0428 - H04Q 11/0471 further classification of invention information is made using CPC symbols of H04Q213/000-H04Q999/00.

In all groups CPC symbols of H04Q213/13XXX are used for additional information.

Broadband documents are classified in H04Q 11/0478.

Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Narrowband
Transmission of up to 2 Mbps
Broadband
Transmission above 2 Mbps
Synonyms and Keywords

In patent documents the following abbreviations are often used:

ISDN
Integrated Services Digital Network
{using optical switching}
Definition statement
This subclass/group covers:
  • Optical cross connects, their architectures, operation, maintenance and control, as well as their optical buffering and optical signal processing means;
  • Optical signal distribution, networking, network architectures, operation, maintenance and control, wherein the optical nature of the signal is relevant to the network layers extending above the physical and data link layers;
  • Networking equipment of optical distribution networks such as passive optical networks, insofar as it is relevant to the planning, design, operation, administration and maintenance of the optical distribution network (e.g. optical network units details).
Relationship between large subject matter areas
  • H04J 14/02 covers wavelength division optical multiplex systems, neither group takes precedence above the other for classification;
  • H04L 12/56 covers packet switching systems in general. In packet switching networks where the optical property of the signal is relevant, groups from the H04L 12/56 can be used to complement the classification where relevant;
  • H04L 12/24 covers the management of networks in general. When the subject-matter deals with the management of optical network, where it is relevant that the network is, groups from the H04L 12/24 can be used to complement the classification where relevant;
  • H04J 3/00 covers time division multiplex systems in general, including SONET/SDH.
References relevant to classification in this group
This subclass/group does not cover:
WDM networks
Optical coupling means having switching means
Physical details of controlling the light using movable of deformable optical means
Physical details of light controlling devices
The transmission and reception of optical signals per se
Fibre channel networks and switches
H04L12/56S8B
SONET/SDH networks
Non reconfigurable add-and-drop multiplexing
Special rules of classification within this group

All Indexing Codes within the group are used as an indexing system, therefore all codes should be given when relevant.

{Details}
Definition statement
This subclass/group covers:

Details not classified in the groups H04Q 11/0005 and H04Q 11/0062, for example:

  • The construction, usage and control of optical packet buffers for optical routing and switching;
  • Arrangements to compress optical packets in the time domain;
  • Optical packet header processing arrangements for optical routing and switching.
{Switch and router aspects}
Definition statement
This subclass/group covers:

Optical cross connects, their architectures, operation, maintenance and control.

{Network aspects}
Definition statement
This subclass/group covers:
  • Optical signal distribution, networking, network architectures, operation, maintenance and control, wherein the optical nature of the signal is relevant to the network layers extending above the physical and data link layers;
  • Networking equipment of optical distribution networks such as passive optical networks, insofar as it is relevant to the planning, design, operation, administration and maintenance of the optical distribution network (e.g. optical network units details).
{Provisions for optical burst or packet networks}
Definition statement
This subclass/group covers:
  • Optical burst switching networking, network architectures, operation, maintenance and control;
  • Optical networking, network architectures, operation, maintenance and control, insofar as special arrangements or techniques for processing the optical packets in the optical signal are used.
{Provisions for the electrical-optical layer interface}
Definition statement
This subclass/group covers:

Interaction between the electrical and optical part of the network insofar as special arrangements or techniques are used that take advantage of the optical nature of the signals within the optical network.

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Last Modified: 10/11/2013