CPC Definition - Subclass H04Q

Last Updated Version: 2021.08
SELECTING (switches, relays, selectors H01H; wireless communication networks H04W)
Definition statement

This place 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
Limiting references

This place does not cover:

Electric switches; Relays; Selectors

H01H

Wireless communication networks

H04W

Informative references

Attention is drawn to the following places, which may be of interest for search:

Cables; Conductors

H01B

Installation of communication cables or lines

H02G

Electronic switches

H03K 17/00

Transmission in general

H04B

Broadcast communication

H04H

Multiplex communication

H04J

Transmission of digital information

H04L

Telephonic communication

H04M

Glossary of terms

In this place, 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
Definition statement

This place 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
Informative references

Attention is drawn to the following places, which may be of interest for search:

Cables; Conductors

H01B

Details of selector switches

H01H 63/00

Installation of communication cables or lines

H02G

Multiplex systems providing for calling or supervisory signals

H04J 1/00, H04J 3/12

Telephone substation equipment

H04M 1/00

Current supply arrangements for telephone systems

H04M 19/00

Synonyms and Keywords

In patent documents, the following abbreviations are often used:

MDF

main distribution frame

{Subscriber network interface devices}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Lines interfacing in the subscriber set

H04M 1/0293

Cable ducts or mountings specially adapted for exchange installations
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Installation of electric cables or lines, or of combined optical and electric cables or lines

H02G

{lightning or EMI protection, e.g. shielding or grounding}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Suppression of noise or interference in transmission systems

H04B 15/00

Current-supply circuits or arrangements for selection equipment at exchanges
Definition statement

This place 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.

Relationships with other classification places

Testing circuits are covered by H04Q 1/20.

Signalling circuits are covered by H04Q 1/30.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Power supply means for computers

G06F 1/26

Systems for transmission via power distribution lines

H04B 3/54

Current supply arrangements over Ethernet

H04L 12/10

Generation of signalling current at the telephone sub station

H04M 1/505

Subscriber line interface circuits (SLIC)

H04M 3/005

Over voltage protection in line interface circuits

H04M 3/18

Subscriber line supervision circuits e.g. off hook detection

H04M 3/2272

Current supply arrangements for telephone systems

H04M 19/00

Glossary of terms

In this place, 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, H04J 3/12)
Definition statement

This place 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.

Relationships with other classification places

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
Limiting references

This place does not cover:

For line selectors providing transfer of routing digits

H04Q 3/12

Multiplex systems to multiplex communication systems

H04J 1/14

Informative references

Attention is drawn to the following places, which may be of interest for search:

Power supply means for computers

G06F 1/26

Systems for transmission via power distribution lines

H04B 3/54

Current supply arrangements over Ethernet

H04L 12/10

Telephone substation equipment

H04M 1/00

Generation of signalling current at the telephone substation

H04M 1/505

Subscriber line interface circuits (SLIC)

H04M 3/005

Over voltage protection in line interface circuits

H04M 3/18

Subscriber line supervision circuits e.g. off hook detection

H04M 3/2272

Current supply arrangements for telephone systems

H04M 19/00

Glossary of terms

In this place, 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 place 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.

Relationships with other classification places

Testing circuits are covered by H04Q 1/20.

Signalling circuits are covered by H04Q 1/30.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Power supply means for computers

G06F 1/26

Systems for transmission via power distribution lines

H04B 3/54

Current supply arrangements over Ethernet

H04L 12/10

Generation of signaling current at the telephone substation

H04M 1/505

Subscriber line interface circuits (SLIC)

H04M 3/005

Over voltage protection in line interface circuits

H04M 3/18

Subscriber line supervision circuits e.g. off hook detection

H04M 3/2272

Current supply arrangements for telephone systems

H04M 19/00

Glossary of terms

In this place, 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 place 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.

Relationships with other classification places

Testing circuits are covered by H04Q 1/20.

Signalling circuits are covered by H04Q 1/30.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Power supply means for computers

G06F 1/26

Systems for transmission via power distribution lines

H04B 3/54

Current supply arrangements over Ethernet

H04L 12/10

Generation of signalling current at the telephone substation

H04M 1/505

Subscriber line supervision circuits e.g. off hook detection

H04M 3/2272

Current supply arrangements for telephone systems

H04M 19/00

Glossary of terms

In this place, 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 - H04Q 11/00 take precedence)
Definition statement

This place covers:

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

References
Limiting references

This place does not cover:

Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange

H04Q 5/00

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

H04Q 9/00

Selecting arrangements for multiplex systems

H04Q 11/00

Informative references

Attention is drawn to the following places, which may be of interest for search:

Signalling arrangements

H04Q 1/30

Multiplex communication

H04J

Intermediate storage means for telegraphic communication

H04L 13/08

Subscriber services provided at exchanges

H04M 3/42

Wireless communications networks

H04W

Glossary of terms

In this place, 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:

BCSM

Basic call state model

SIBBS

Service-independent building blocks

PBX

Private branch exchange

{Provisions for signalling}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Circuitry specially adapted for provisions for signalling

H04Q 1/30

{Personal communication services, e.g. provisions for portability of subscriber numbers}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Subscriber services provided at exchanges

H04M 3/42

{Optical switching systems}
References
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.

H04Q 11/0005

Optical coupling means having switching means

G02B 6/28

Physical details of controlling the light using movable or deformable optical means

G02B 26/00

Physical details of light controlling devices

G02F 1/00

{Logic circuits or arrangements therefor}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Logic circuits in general

H03K 19/00

Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

For establishing connections among stations for the purpose of transferring information via these connections

H04Q 1/00

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 place covers:

Monitoring/supervising of remote device/systems.

Collecting data from sensors

Apparatus comprising RFID in combination with sensors.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Toy vehicles

A63H 17/00

Electric circuits specially adapted for vehicles

B60R 16/02

Applications of remote control devices for cranes

B66C 13/40

Electric permutation locks

E05B 49/00

Electric programme-control systems

G05B 19/02

Input and output arrangements for digital data processing

G06F 3/00

Individual entry or exit registers

G07C 9/00

Transmission systems for measured values, control signal

G08C

Circuit arrangements for providing remote control of switching means in a power distribution network

H02J 13/00

Remote-control of tuned circuits

H03J 9/00

Data switching networks

H04L 12/00

Telephonic communication systems adapted for combination with other electrical systems

H04M 11/00

Receiver circuitry of television systems

H04N 5/44

Selecting arrangements for multiplex systems (multiplex systems H04J)
References
Limiting references

This place does not cover:

Multiplex systems

H04J

Informative references

Attention is drawn to the following places, which may be of interest for search:

Wireless communications networks

H04W

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Narrowband

Transmission of up to 2 Mbps

Broadband

Transmission above 2 Mbps

{using optical switching}
Definition statement

This place 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).
Relationships with other classification places
  • 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 41/00 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 41/00 can be used to complement the classification where relevant;
  • H04J 3/00 covers time division multiplex systems in general, including SONET/SDH.
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Optical coupling means having switching means

G02B 6/28

Physical details of controlling the light using movable or deformable optical means

G02B 26/00

Physical details of light controlling devices

G02F 1/00

Transmission and reception of optical signals per se

H04B 10/00

SONET/SDH networks

H04J 3/00, H04J 14/02

Non reconfigurable add-and-drop multiplexing

H04J 14/04

Fibre channel networks switches

H04L 49/357

Special rules of classification

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

{Details}
Definition statement

This place 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 place covers:

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

{Network aspects}
Definition statement

This place 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 place 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 place 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.