H:	ELECTRICITY
H04:	ELECTRIC COMMUNICATION TECHNIQUE
H04M:	TELEPHONIC COMMUNICATION
H04M1/00:	Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges
H04M1/00B:	. Telephone sets using electrooptical means in the transmission path
H04M1/00T:	. Call diverting means
H04M1/02:	. Constructional features of telephone sets
H04M1/02A:	. . Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets constructional features of telephone transmitters or receivers, e.g. of speakers or microphones H04M1/03; mounting of the dialing module H04M1/23; with protection against RF exposure H04B1/38P2E
H04M1/02A10:	. . . Details of the mechanical connection between the housing parts or relating to the method of assembly
H04M1/02A10S:	. . . . by means of a snap-on mechanism
H04M1/02A12:	. . . comprising one or a plurality of mechanically detachable modules
H04M1/02A12F:	. . . . wherein the modules are operable in the detached state, e.g. one module for the user interface and one module for the transceiver
H04M1/02A12H:	. . . . for a headset device constructional features of headsets H04M1/05; headsets for handsfree use H04M1/60T2B
H04M1/02A14:	. . . Details of the structure or mounting of specific components
H04M1/02A14B:	. . . . for a battery compartment
H04M1/02A14C:	. . . . for a camera module assembly photo or video cameras per se G03B; television cameras per se H04N5/225
H04M1/02A14D:	. . . . [N: for a display module assembly (for fixed telephones H04M1/02S) ]
H04M1/02A14D2:	. . . . . including a flexible display panel
H04M1/02A14D4:	. . . . . including magnifying means
H04M1/02A14F:	. . . . [N: for a projector or beamer module assembly (constructional features of projectors per se G03B21; constructional details of projectors using electronic spatial light modulators per se H04N9/31) ]
H04M1/02A14M:	. . . . for an electrical connector module
H04M1/02A14P:	. . . . for a printed circuit board assembly
H04M1/02A16:	. . . Improving the user comfort or ergonomics
H04M1/02A16A:	. . . . for providing single handed use or left/right hand conversion
H04M1/02A16D:	. . . . for providing a decorative aspect, e.g. customization of casings, exchangeable faceplate
H04M1/02A16P:	. . . . Pen-type handsets
H04M1/02A18:	. . . [N: being disposable or recyclable ]
H04M1/02A2:	. . . [N: Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings]
H04M1/02A2B:	. . . . [N: characterized by the relative motions of the body parts]
H04M1/02A2B2:	. . . . . [N: using combined folding and rotation motions (combined with translation movement H04M1/02A2B8)]
H04M1/02A2B2F:	. . . . . . [N: with a two degrees of freedom mechanism, i.e. folding around a first axis and rotating around a second axis perpendicular to the first]
H04M1/02A2B4:	. . . . . [N: Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position (combined with translation movement H04M1/02A2B8)]
H04M1/02A2B4F:	. . . . . . [N: Foldable in one direction, i.e. using a one degree of freedom hinge]
H04M1/02A2B4F1:	. . . . . . . [N: The hinge comprising input and/or output user interface means]
H04M1/02A2B4F2:	. . . . . . . [N: The hinge comprising two parallel pivoting axes]
H04M1/02A2B4T:	. . . . . . [N: Foldable in two directions, i.e. using a two degree of freedom hinge]
H04M1/02A2B6:	. . . . . [N: Rotatable telephones, i.e. the body parts pivoting to an open position around an axis perpendicular to the plane they define in closed position (combined with translation movement H04M1/02A2B8)]
H04M1/02A2B6F:	. . . . . . [N: Rotatable in one plane, i.e. using a one degree of freedom hinge]
H04M1/02A2B6F1:	. . . . . . . [N: The hinge comprising input and/or output user interface means]
H04M1/02A2B6K:	. . . . . . [N: Including a rotatable keypad body part]
H04M1/02A2B6S:	. . . . . . [N: Including a rotatable display body part]
H04M1/02A2B8:	. . . . . [N: Slidable or telescopic telephones, i.e. with a relative translation movement of the body parts; Telephones using a combination of translation and other relative motions of the body parts]
H04M1/02A2B8F:	. . . . . . [N: Sliding mechanism with one degree of freedom]
H04M1/02A2B8T:	. . . . . . [N: Sliding mechanism with two degree of freedom, e.g. translation in two different directions]
H04M1/02A2F:	. . . . [N: using relative motion of the body parts to change the operational status of the telephone set, e.g. switching on/off, answering incoming call]
H04M1/02A2F1:	. . . . . [N: using the relative angle between housings]
H04M1/02A2F2:	. . . . . [N: using open/close detection]
H04M1/02A2P:	. . . . [N: comprising more than two body parts]
H04M1/02B:	. . Telephone sets for operators
H04M1/02C:	. . Door telephones
H04M1/02D:	. . Terminal boxes for telephone sets
H04M1/02S:	. . [N: mechanical mounting details of display modules (for portable telephones H04M1/02A14D) ]
H04M1/02W:	. . Telephone sets adapted to be mounted on a desk or on a wall
H04M1/03:	. . Constructional features of telephone transmitters or receivers, e.g. telephone handsets, speakers or microphones
H04M1/03C:	. . . Improving the acoustic characteristics by means of constructional features of the housing, e.g. ribs, walls, resonating chambers or cavities
H04M1/04:	. . Supports for telephone transmitters or receivers
H04M1/05:	. . . adapted for use on head, throat, or breast handsfree use of portable phones H04M1/60T2
H04M1/06:	. . . Hooks; Cradles
H04M1/08:	. . . . associated with switches operated by weight of receiver or hand-set
H04M1/10:	. . . . associated with switches operated by magnetic effect due to proximity of receiver or hand-set
H04M1/11:	. . Supports for sets, e.g. incorporating armrests
H04M1/12:	. . . Adjustable supports, e.g. extensible
H04M1/13:	. . . . pantographic
H04M1/14:	. . . with resilent means to eliminate extraneous vibrations
H04M1/15:	. . Protection of telephone cord; Guiding telephone cord; Winding-up telephone cord
H04M1/17:	. . Hygienic or sanitary devices on telephone equipment
H04M1/18:	. . Telephone sets modified for use in ships, mines, or other places exposed to adverse environment
H04M1/18R:	. . . Improving the rigidity of the casing or resistance to shocks
H04M1/19:	. . Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Special mouthpieces or receivers therefor
H04M1/20:	. . Arrangements for preventing acoustic feed-back
H04M1/21:	. . Combinations with auxiliary equipment, e.g. with clock, with memoranda pad
H04M1/215:	. . . by non-intrusive coupling means, e.g. acoustic couplers
H04M1/215A:	. . . . Acoustic coupling
H04M1/22:	. . Illuminating; Arrangements for improving visibility of characters on dials
H04M1/23:	. . Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof
H04M1/23P:	. . . including a pointing device, e.g. roller key, track ball, rocker switch or joystick constructional details of pointing devices per se G06F3/033
H04M1/23S:	. . . including keys on side or rear faces
H04M1/24:	. Arrangements for testing
H04M1/247:	. Telephone sets including user guidance or features selection means facilitating their use; Fixed telephone terminals for accessing a variety of communication services via the PSTN network
H04M1/247A:	. . [N: Configurable and interactive telephone terminals with subscriber controlled features modifications, e.g. with ADSI capability
H04M1/247A1:	. . . with programmable function keys
H04M1/247C:	. . Telephone terminals interfacing a personal computer, e.g. using an API Application Programming Interface) (details of API H04M7/00C6
H04M1/247D:	. . Telephone terminals specially adapted for disabled people H04M1/725F5 takes precedence; network based special services or facilities for hearing-impaired persons H04M3/42Z; devices for conversing with the deaf-blind G09B21/04
H04M1/247D1:	. . . for a hearing impaired user hearing-aids per se H04R25/00
H04M1/247D2:	. . . for a visually impaired user H04M1/22 takes precedence
H04M1/247F:	. . for selecting a function from a menu display H04M1/247D takes precedence
H04M1/247N:	. . Telephone terminals specially adapted for non-voice services, e.g. email, internet access centralized arrangements where telephones services are combined H04M7/00D; for recording text messages H04M3/53T; for accessing Internet H04M3/493W
H04M1/253:	. Telephone sets using digital voice transmission
H04M1/253W:	. . adapted for voice communication over an Internet Protocol IP) network (Voice over Internet Protocol (VoIP) network equipment and services H04M7/00M; internet protocols H04L29/06J
H04M1/26:	. Devices for signalling identity of wanted subscriber
H04M1/27:	. . Devices whereby a plurality of signals may be stored simultaneously devices disposed in the exchange H04M3/424, H04M3/44
H04M1/272:	. . . with provision for storing only one subscriber number at a time, e.g. by keyboard or dial
H04M1/272A:	. . . . using electronic memories
H04M1/274:	. . . with provision for storing more than one subscriber number at a time, e.g. using toothed disc
H04M1/2745:	. . . . using static electronic memories, i.e. memories whose operation does not require relative movement between storage means and a transducer, e.g. chip; Fax machines H04N1/32B
H04M1/2745A:	. . . . . [N: Telephone number directory allowing to store a plurality of information regarding one subscriber]
H04M1/2745C:	. . . . . whose content are provided by data transmission or downloaded
H04M1/2745D:	. . . . . Retrieving by scrolling on a display
H04M1/2745E:	. . . . . [N: Telephone number directory management, e.g. manually editing, erasing or modifying data stored in the directory]
H04M1/2745G:	. . . . . Retrieving by interactive graphical means or pictorial representation
H04M1/2745M:	. . . . . Retrieving by matching an alphabetic string
H04M1/2745P:	. . . . . Appending a prefix or inserting a pause to a dialling sequence
H04M1/2745R:	. . . . . Automatic call origination and retry systems, e.g. on off-hook or redial on busy
H04M1/2745S:	. . . . . Sorted according to a specific criteria, e.g. history or frequency of use
H04M1/2745Z:	. . . . . Implemented by means of discrete electronic components, i.e. neither programmable nor micro-processor controlled H04M1/2745C to H04M1/2745S take precedence
H04M1/275:	. . . . . implemented by means of portable electronic directories
H04M1/2755:	. . . . . whose contents are provided by optical scanning
H04M1/276:	. . . . using magnetic recording, e.g. on tape
H04M1/276A:	. . . . . implemented by means of portable magnetic cards
H04M1/278:	. . . . using punched cards or tapes
H04M1/27A:	. . . controlled by voice recognition
H04M1/30:	. . Devices which can set up and transmit only one digit at a time
H04M1/31:	. . . by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
H04M1/315:	. . . . Clutches, spring assemblies, speed regulators, e.g. centrifugal brakes
H04M1/31A:	. . . . pulses produced by electronic circuits
H04M1/32:	. . . . Locking setting devices during transmission to prevent interference by user
H04M1/34:	. . . . Lost-motion or other arrangements for ensuring a pause between successive digit transmissions
H04M1/38:	. . . . Pulses transmitted by a movement variably limited by the setting of a stop
H04M1/40:	. . . . wherein the setting-operation short-circuits or open-circuits the transmitting mechanism during a variable part of a cycle
H04M1/50:	. . . by generating or selecting currents of predetermined frequencies or combinations of frequencies
H04M1/50A:	. . . . signals generated in digital form
H04M1/515:	. . by generating or selecting other signals than trains of pulses of similar shape or other signals than currents of one or more different frequencies, e.g. generation of direct current signals of alternating polarity, coded pulses, impedance dialling
H04M1/52:	. . Arrangements wherein a dial or equivalent is mechanically coupled to a line selector
H04M1/53:	. . Generation of additional signals, e.g. additional pulses
H04M1/54:	. . . Arrangements wherein a dial or equivalent generates identifying signals, e.g. in party-line systems
H04M1/56:	. Arrangements for indicating or recording the called number at the calling subscriber`s set
H04M1/57:	. Arrangements for indicating or recording the number of the calling subscriber at the called subscriber`s set
H04M1/57B:	. . [N: Blocking transmission of caller identification to called party]
H04M1/57M:	. . Line monitoring circuits for detecting caller identification
H04M1/57P:	. . Means for retrieving and displaying personal data about calling party
H04M1/57P1:	. . . associated with a pictorial or graphical representation
H04M1/57P2:	. . . associated with a synthesized vocal announcement
H04M1/58:	. Anti-side-tone circuits
H04M1/58H:	. . implemented without inductive element
H04M1/60:	. including speech amplifiers
H04M1/60M:	. . in the transmitter circuit
H04M1/60R:	. . in the receiver circuit
H04M1/60S:	. . implemented as integrated speech networks
H04M1/60T:	. . for providing handsfree use or a loudspeaker mode in telephone sets arrangements for preventing acoustic echo H04M9/08
H04M1/60T2:	. . . Portable telephones adapted for handsfree use
H04M1/60T2A:	. . . . involving control of the receiver volume to provide a dual operational mode at close or far distance from the user
H04M1/60T2B:	. . . . involving the use of a headset accessory device connected to the portable telephone
H04M1/60T2B2:	. . . . . including a wireless connection
H04M1/60T2C:	. . . . adapted for handsfree use in a vehicle H04M1/60T2B takes precedence; arrangements for holding telephones in a vehicle B60R11/02G
H04M1/60T2C2:	. . . . . by interfacing with the vehicle audio system
H04M1/60T2C2A:	. . . . . . including a wireless interface
H04M1/62:	. . Constructional arrangements
H04M1/64:	. Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
H04M1/64D:	. . storing speech in digital form
H04M1/64D2:	. . . with speech synthesis
H04M1/64M:	. . using magnetic tape H04M1/64D takes precedence
H04M1/65:	. . Recording arrangements for recording a message from the calling party in the exchange H04M3/50
H04M1/652:	. . . Means for playing back the recorded messages by remote control over a telephone line
H04M1/654:	. . . Telephone line monitoring circuits therefor, e.g. ring detector
H04M1/654B:	. . . . mechanically actuating hook switch, e.g. lifting handset
H04M1/656:	. . . for recording conversations
H04M1/658:	. . . Means for redirecting recorded messages to other extensions or equipment
H04M1/65D:	. . . storing speech in digital form
H04M1/65D2:	. . . . with speech synthesis
H04M1/65M:	. . . using magnetic tape H04M1/65D takes precedence
H04M1/66:	. with means for preventing unauthorised or fraudulent calling
H04M1/663:	. . Preventing unauthorised calls to a telephone set
H04M1/665:	. . . by checking the validity of a code
H04M1/667:	. . Preventing unauthorised calls from a telephone set
H04M1/67:	. . . by electronic means
H04M1/673:	. . . . the user being required to key in a code
H04M1/675:	. . . . the user being required to insert a coded card, e.g. a smart card carrying an integrated circuit chip
H04M1/677:	. . Preventing the dialling or sending of predetermined telephone numbers or selected types of telephone numbers, e.g. long distance
H04M1/677A:	. . . by providing access to preprogrammed keys]
H04M1/68:	. Circuit arrangements for preventing eavesdropping
H04M1/70:	. . Lock-out or secrecy arrangements in party-line systems
H04M1/72:	. Substation extension arrangements; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selecting [N: (constructional features of cordless telephones H04M1/02A)]
H04M1/723:	. . using two or more extensions per line
H04M1/725:	. . Cordless telephones for handsfree use H04M1/60T2
H04M1/725C:	. . . with one base station connected to a single line
H04M1/725C2:	. . . . Radio link set-up procedure
H04M1/725C2C:	. . . . . using a control channel
H04M1/725C2F:	. . . . . Searching for an available channel
H04M1/725C2H:	. . . . . On hold, intercom or transfer communication modes
H04M1/725C4:	. . . . including out-of-range alerting means
H04M1/725F:	. . . Portable communication terminals with improved user interface to control a main telephone operation mode or to indicate the communication status
H04M1/725F1:	. . . . With means for supporting locally a plurality of applications to increase the functionality for selecting a function in a menu H04M1/247F
H04M1/725F1A:	. . . . . provided by software upgrading or downloading
H04M1/725F1B:	. . . . . provided by interfacing with an external accessory hands-free H04M1/60T2
H04M1/725F1B1:	. . . . . . using a two-way short-range wireless interface
H04M1/725F1B2:	. . . . . . for remote control of appliances
H04M1/725F1E:	. . . . . [N: for supporting an emergency service (alarm systems G08B; telephonic communication systems in combination with alarm systems H04M11/04; telephone sets for disabled persons H04M1/247D)]
H04M1/725F1E2:	. . . . . . [N: with automatic feature activation, e.g. upon sensing of an alarm condition]
H04M1/725F1E4:	. . . . . . [N: with manual feature activation]
H04M1/725F1G:	. . . . . for supporting a game or graphical animation
H04M1/725F1M:	. . . . . with interactive input/output means for internally managing multimedia messages Mail systems for messages comprising audio and non-audio componentsH04M3/53M; Message switching systems H04L12/58
H04M1/725F1M2:	. . . . . . for voice messaging, e.g. dictaphone for answering an incoming call H04M1/64
H04M1/725F1M4:	. . . . . . for text messaging, e.g. sms, e-mail
H04M1/725F1M6:	. . . . . . for still or moving picture messaging systems for transmission of still picture signals H04N1/00B; Videophones H04N7/14
H04M1/725F1P:	. . . . . [N: for playing back music files (portable music players per se G11B27) ]
H04M1/725F1W:	. . . . . for supporting an internet browser application
H04M1/725F2:	. . . . with means for adapting by the user the functionality or the communication capability of the terminal under specific circumstances
H04M1/725F2A:	. . . . .  depending on a schedule, a location or a context[N0312]
H04M1/725F2B:	. . . . .  by connection of an exchangeable housing part[N0312]
H04M1/725F2C:	. . . . . according to a schedule or a calendar application network applications for presence management H04L29/08N23
H04M1/725F2E:	. . . . . according to context or environment related information
H04M1/725F2G:	. . . . . according to a geographic location user location related services provided by wireless communication networks H04W4/02; network applications adapted for the location of the user terminal H04L29/08N17
H04M1/725F2H:	. . . . . by connection of an exchangeable housing part
H04M1/725F2R:	. . . . . to restrict the functionality or the communication capability of the terminal network access restriction H04W48/02
H04M1/725F3:	. . . . by using keys with multiple functionality defined by the current phone mode or status
H04M1/725F4:	. . . . for operating the terminal by selecting telephonic functions from a plurality of displayed items, e.g. menus, icons interaction techniques for Graphical User Interfaces per se G06F3/048
H04M1/725F4S:	. . . . . wherein the items are sorted according to a specific criteria, e.g. frequency of use
H04M1/725F5:	. . . . specially adapted for disabled people devices for conversing with the deaf-blind G09B21/04
H04M1/725F5H:	. . . . . for a hearing impaired user hearing-aids per se H04R25/00
H04M1/725F5V:	. . . . . for a visually impaired user H04M1/22 takes precedence
H04M1/725F6:	. . . . wherein handling of applications is triggered by incoming communication events changing user alerting upon occurrence of events H04M19/04
H04M1/727:	. . . Identification code transfer arrangements
H04M1/73:	. . . Battery saving arrangements by switching on/off the receiving circuit H04B1/16A2
H04M1/733:	. . . with a plurality of base stations connected to a plurality of lines for selection in cordless PBX H04Q7/26
H04M1/737:	. . . characterised by transmission of electromagnetic waves other than radio waves, e.g. infra-red
H04M1/738:	. Interface circuits for coupling substations to external telephone lines
H04M1/738P:	. . Programmable or microprocessor-controlled
H04M1/74:	. . with means for reducing interference; with means for reducing effects due to line faults
H04M1/74P:	. . . Protection devices or circuits for voltages surges on the line
H04M1/76:	. . Compensating for differences in line impedance
H04M1/78:	. Circuit arrangements in which low-frequency speech signals proceed in one direction on the line, while speech signals proceeding in the other direction on the line are modulated on a high-frequency carrier signal
H04M1/80:	. Telephone line holding circuits
H04M1/82:	. Line monitoring circuits for call progress or status discrimination for detecting caller identity H04M1/57M
H04M3/00:	Automatic or semi-automatic exchanges constructional details of telephone exchanges H04Q1/02
H04M3/00E:	. Applications of echo suppressors or cancellers in telephonic connections in two-way loud-speaking telephone systems H04M9/08, echo suppressors or cancellers per se H04B3/20
H04M3/00L:	. Interface circuits for subscriber lines current supply H04M19/00 and subgroups; supervisory, monitoring or testing arrangements H04M3/22 and subgroups; in key telephone systems H04M9/00K3L
H04M3/00L2:	. . Access interface units for simultaneous transmission of speech and data, e.g. digital subscriber line (DSL) access interface units (DSL access multiplexersH04Q11/04S2, andH04L12/28P1)
H04M3/02:	. Ringing or otherwise calling substations
H04M3/04:	. . calling signal supplied from final selector
H04M3/06:	. . calling signal supplied from subscriber`s line circuit
H04M3/08:	. Indicating faults in circuits or apparatus
H04M3/08L:	. . Fault locating arrangements
H04M3/10:	. . Providing fault or trouble signals
H04M3/12:	. . Marking faulty circuits "busy"; Enabling equipment to disengage itself from faulty circuits; Using redundant circuits; Response of a circuit, apparatus or system to an error
H04M3/14:	. . Signalling existence of persistent "off-hook" condition
H04M3/16:	. with lock-out or secrecy provision in party-line systems
H04M3/18:	. with means for reducing interference or noise ; with means for reducing effects due to line faults with means for protecting lines
H04M3/20:	. with means for interrupting existing connections; with means for breaking-in on conversations
H04M3/20E:	. . [N: Eavesdropping prevention - indication of insecurity of line or network]
H04M3/22:	. Supervisory, monitoring, management, i.e. operation, administration, maintenance or testing arrangements
H04M3/22B:	. . [N: for lines also used for data transmission]
H04M3/22D:	. . Call detail recording
H04M3/22F:	. . Quality of service monitoring
H04M3/22K:	. . Quality of speech transmission monitoring
H04M3/22L:	. . [N: Management of the local loop plant]
H04M3/22N:	. . in networks
H04M3/22N2:	. . . Network management
H04M3/22S:	. . Subscriber line supervision circuits, e.g. call detection circuits
H04M3/22T:	. . [N: Call monitoring, e.g. for law enforcement purposes; Call tracing; Detection or prevention of malicious calls]
H04M3/22W:	. . Wire identification arrangements; Number assignment determination
H04M3/24:	. . with provision for checking the normal operation
H04M3/24A:	. . . for stored program controlled exchanges
H04M3/24A1:	. . . . Software testing
H04M3/24B:	. . . for multiplex systems H04M3/30B takes precedence
H04M3/24B1:	. . . . for ISDN systems
H04M3/24E:	. . . Knowledge-based maintenance systems
H04M3/24M:	. . . for metering arrangements or prepayment telephone systems metering arrangements per se H04M15/00; prepayment telephone systems per se H04M17/00
H04M3/26:	. . with means for applying test signals or for measuring
H04M3/28:	. . . Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
H04M3/30:	. . . . for subscriber`s lines , for the local loop
H04M3/30C:	. . . . . Circuit arrangements at the subscriber`s side of the line
H04M3/30M:	. . . . . using modulation techniques for copper pairs for ISDN systems H04M3/24B1; ISDN selection or connection testing arrangements H04Q11/04S1M
H04M3/30M2:	. . . . . . and using PCM multiplexers, e.g. pair gain systems
H04M3/30M4:	. . . . . . and using xDSL modems xDSL line qualification H04M3/30P2
H04M3/30P:	. . . . . testing of physical copper line parameters, e.g. capacitance or resistance locating faults in cables G01R31/08
H04M3/30P2:	. . . . . . for frequencies above the voice frequency, e.g. xDSL line qualification test methods, test equipment and test arrangements for subscriber lines using xDSL modems H04M3/30M4; Systems modifying transmission characteristics according to link quality H04L1/00A; Monitoring and/or testing of line transmission systems H04B3/46
H04M3/30R:	. . . . . [N: using ringback]
H04M3/30T:	. . . . . [N: Craftsperson test terminals]
H04M3/32:	. . . . for lines between exchanges
H04M3/32A:	. . . . . for the arrangements providing the connection (test connection, test call, call simulation)
H04M3/32B:	. . . . . for registers and translators
H04M3/34:	. . . Testing for cross-talk
H04M3/36:	. . Statistical metering, e.g. recording occasions when traffic exceeds capacity of trunks
H04M3/36A:	. . . Traffic simulation
H04M3/36B:	. . . Load metering of control unit
H04M3/36C:	. . . [N: Traffic or load control ]
H04M3/38:	. Graded-service arrangements, i.e. some subscribers prevented from establishing certain connections
H04M3/38A:	. . using authorisation codes or passwords
H04M3/38A2:	. . . [N: using speech signals]
H04M3/38S:	. . [N: using subscriber identification cards]
H04M3/40:	. Applications of speech amplifiers
H04M3/42:	. Systems providing special services or facilities to subscribers
H04M3/424:	. . Arrangements for automatic redialling
H04M3/428:	. . Arrangements for placing incoming calls on hold
H04M3/428B:	. . . when the called subscriber is connected to a data network using his telephone line, e.g. dial-up connection, Internet browsing
H04M3/428H:	. . . Call holding circuits
H04M3/428M:	. . . Notifying, informing or entertaining a held party while on hold, e.g. Music On Hold
H04M3/428R:	. . . Notifying a held subscriber when his held call is removed from hold
H04M3/428W:	. . . Notifying a called subscriber of an incoming call during an ongoing call, e.g. Call Waiting
H04M3/42A:	. . Systems for anonymous communication between parties, e.g. by use of disposal contact identifiers
H04M3/42B:	. . Customized ring-back tones
H04M3/42C:	. . Calling or Called party identification service (not used)
H04M3/42C1:	. . . Calling party identification service (not used)
H04M3/42C1N:	. . . . Notifying the called party of information on the calling party details within substation equipment H04M1/57, signalling details H04Q3/72
H04M3/42C1N2:	. . . . . where the notification is included in the ringing tone
H04M3/42C1U:	. . . . [N: Making use of the calling party identifier]
H04M3/42C1U2:	. . . . . [N: where the identifier is used to access a profile]
H04M3/42C1U4:	. . . . . [N: where the identifier is a Uniform Resource Locator]
H04M3/42C2:	. . . Called party identification service (not used)
H04M3/42C2N:	. . . . [N: Notifying the calling party of information on the called or connected party]
H04M3/42C2U:	. . . . [N: Making use of the called party identifier]
H04M3/42C2U2:	. . . . . [N: where the identifier is used to access a profile]
H04M3/42C2U4:	. . . . . [N: where the identifier is a Uniform Resource Locator]
H04M3/42D:	. . Systems providing several special services or facilities from groups H04M3/42A to H04M3/58
H04M3/42E:	. . Administration or customisation of services
H04M3/42E1:	. . . by service provider
H04M3/42E2:	. . . by subscriber
H04M3/42E2D:	. . . . [N: via computer interface]
H04M3/42E3:	. . . Managing service interactions
H04M3/42E5:	. . . by downloading data to substation equipment
H04M3/42F:	. . [N: Lines and connections with preferential service]
H04M3/42G:	. . Arrangements for calling back a calling subscriberwhen the wanted subscriber ceases to be busy H04M3/48
H04M3/42H:	. . Arrangements at the exchange for service or number selection by voice at the terminal H04M1/27
H04M3/42K:	. . Call pickup comprising simultaneous alerting H04M3/46
H04M3/42L:	. . Conversation recording systems at the subscriber`s set H04M1/656
H04M3/42M:	. . [N: Personal communication services, i.e. services related to one subscriber independent of his terminal and/or location (diverting calls from one subscriber to another subscriber, i.e. two different subscriptions H04M3/54; selecting arrangements in intelligent networks H04Q3/00D3P)]
H04M3/42M2:	. . . [N: in systems with telephone lines with multiple users]
H04M3/42M5:	. . . [N: where the subscriber uses a multi-mode terminal which moves and accesses different networks with at least one network having a wireline access including cordless PBX]
H04M3/42M5P:	. . . . [N: with the subscriber having a personal network-independent number]
H04M3/42M7:	. . . [N: where the same subscriber uses different terminals, i.e. nomadism]
H04M3/42M7P:	. . . . [N: whereby the subscriber registers to the terminals for personalised service provision]
H04M3/42N:	. . in networks
H04M3/42N3:	. . . [N: with carrierprovider selection by subscriber]
H04M3/42N5:	. . . [N: with number portability]
H04M3/42N7:	. . . Number translation services, e.g. premium-rate, freephone or vanity number services
H04M3/42P:	. . in private branch exchanges
H04M3/42P2:	. . . PBX`s with CTI arrangements
H04M3/42P6:	. . . [N: Direct inward dialling]
H04M3/42P8:	. . . [N: Remote access to features of PBX or home telephone systems-teleworking in a PBX]
H04M3/42R:	. . [N: Location-based services which utilize the location information of a target]
H04M3/42R2:	. . . [N: where the information is provided to a monitoring entity such as a potential calling party or a call processing server]
H04M3/42S:	. . [N: Presence services providing information on the willingness to communicate or the ability to communicate in terms of media capability or network connectivity]
H04M3/42S2:	. . . [N: where the information is provided to a monitoring entity such as a potential calling party or a call processing server]
H04M3/42T:	. . Text-based messaging services in telephone networks such as PSTN/ISDN, e.g. User-to-User Signalling or Short Message Service for fixed networks
H04M3/42Z:	. . where the subscribers are hearing-impaired persons, e.g. telephone devices for the deaf
H04M3/432:	. . Arrangements for calling a subscriber at a specific time, e.g. morning call service
H04M3/436:	. . Arrangements for screening incoming calls, i.e. evaluating the characteristics of a call before deciding whether to answer it based on the calling party profile H04M3/42C1U; based on location H04M3/42R; based on presence H04M3/42S; diversion H04M3/54
H04M3/436C:	. . . based on information specified by the calling party, e.g. priority or subject
H04M3/44:	. . Additional connecting arrangements for providing access to frequently-wanted subscribers, e.g. abbreviated dialling
H04M3/46:	. . Arrangements for calling a number of substations in a predetermined sequence until an answer is obtained
H04M3/46M:	. . . Arrangements for simultaneously calling a number of substations until an answer is obtained
H04M3/48:	. . Arrangements for recalling a calling subscriber when the wanted subscriber ceases to be busy
H04M3/487:	. . Arrangements for providing information services, e.g. recorded voice services, time announcement
H04M3/487N:	. . . Non-interactive information services
H04M3/487N2:	. . . . Intercept announcements
H04M3/487N4:	. . . . Time announcements
H04M3/487N6:	. . . . Advertisement messages
H04M3/493:	. . . Interactive information services, e.g. directory enquiries; Arrangements therefor, e.g. interactive voice response [IVR systems or voice portals]
H04M3/493D:	. . . . Directory assistance systems
H04M3/493D2:	. . . . . [N: with operator assistance]
H04M3/493D4:	. . . . . [N: Connection initiated by DAS system]
H04M3/493S:	. . . . Speech interaction details speech recognition per se G10L15/00
H04M3/493W:	. . . . comprising a voice browser which renders and interprets e.g. VoiceXML
H04M3/50:	. . Centralised arrangements for answering calls; Centralised arrangements for recording messages for absent or busy subscribers ; Centralised arrangements for recording messages
H04M3/51:	. . . Centralised call answering arrangements requiring operator intervention, e.g. call or contact centers for telemarketing
H04M3/51A:	. . . . Secretarial services
H04M3/51E:	. . . . [N: for emergency applications]
H04M3/51H:	. . . . with remote located operators
H04M3/51K:	. . . . [N: Operator terminal details]
H04M3/51M:	. . . . Details of processing calls and other types of contacts in an unified manner unified messaging in packet-switching networks H04L12/58U
H04M3/51N:	. . . . Night service systems
H04M3/51P:	. . . . in combination with automated outdialling systems devices for signalling identity of wanted subscriber H04M1/26
H04M3/51R:	. . . . in combination with interactive voice response systems or voice portals e.g. as front-ends
H04M3/51S:	. . . . Call or contact centers supervision arrangements
H04M3/51T:	. . . . Call or contact centers with computer-telephony arrangements
H04M3/51T2:	. . . . . interacting with the Internet
H04M3/52:	. . . . Arrangements for routing dead number calls to operators
H04M3/523:	. . . . with call distribution or queueing
H04M3/523B:	. . . . . [N: with call back arrangements]
H04M3/523D:	. . . . . Call distribution algorithms
H04M3/523D2:	. . . . . . Operator skill based call distribution
H04M3/523D4:	. . . . . . [N: Uniform load distribution]
H04M3/523D6:	. . . . . . [N: Dependent on call type or called number (DNIS)]
H04M3/523D8:	. . . . . . [N: Sequential or circular distribution]
H04M3/523N:	. . . . . Interconnection arrangements between ACD systems
H04M3/523T:	. . . . . [N: with waiting time or load prediction arrangements]
H04M3/527:	. . . Centralised call answering arrangements not requiring operator intervention
H04M3/53:	. . . Centralised arrangements for recording incoming messages i.e. mailbox systems
H04M3/533:	. . . . Voice mail systems
H04M3/533B:	. . . . . Message originator indirectly connected to the message centre, e.g. after detection of busy or absent state of a called party
H04M3/533D:	. . . . . Messaging centre selected by message originator
H04M3/533N:	. . . . . Interconnection arrangements between voice mail systems
H04M3/533R:	. . . . . Message receiving aspects
H04M3/533R1:	. . . . . . [N: Message reply]
H04M3/533R2:	. . . . . . [N: Message type or catagory, e.g. priority, indication]
H04M3/533R3:	. . . . . . [N: Message preview]
H04M3/533S:	. . . . . Message disposing or creating aspects
H04M3/533S1:	. . . . . . [N: Message broadcasting]
H04M3/533S2:	. . . . . . [N: Message registering commands or announcements; Greetings]
H04M3/533S2N:	. . . . . . . [N: dependent on calling party]
H04M3/537:	. . . . Arrangements for indicating the presence of a recorded message, whereby the presence information might include a preview or summary of the message
H04M3/53M:	. . . . for recording messages comprising any combination of audio and non-audio components
H04M3/53M2:	. . . . . where the non-audio components are still images or video still image mailbox systems H04N1/32F2, intermediate storage of video signals for videophones H04N7/14A3
H04M3/53T:	. . . . for recording text messages
H04M3/54:	. . Arrangements for diverting calls for one subscriber to another predetermined subscriber based on the calling party profile H04M3/42C1U; based on location H04M3/42R; based on presence H04M3/42S; to voice mail H04M3/533B
H04M3/54C:	. . . based on information specified by the calling party
H04M3/54D:	. . . Call deflection
H04M3/54L:	. . . [N: with loop avoiding arrangements]
H04M3/54P:	. . . in private branch exchanges
H04M3/54R:	. . . [N: with remote control]
H04M3/56:	. . Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
H04M3/56A:	. . . by multiplexing
H04M3/56D:	. . . where the conference facilities are distributed
H04M3/56G:	. . . User guidance or feature selection
H04M3/56G2:	. . . . whereby the feature is a sub-conference
H04M3/56G4:	. . . . relating to time schedule aspects
H04M3/56G6:	. . . . relating to a participants right to speak protocols for floor control H04L29/06M4C2, H04L29/06M4C4, H04L29/06M4C6
H04M3/56M:	. . . Multimedia conference systems
H04M3/56P:	. . . audio processing specific to telephonic conferencing, e.g. spatial distribution, mixing of participants echo suppression in two-way loud-speaking telephone systems H04M9/02; sound field processing per se H04S7/00E
H04M3/56P2:	. . . . [N: using the instant speaker's algorithm
H04M3/56S:	. . . using the instant speaker`s algorithm
H04M3/58:	. . Arrangements for transferring received calls from one subscriber to another; Arrangements affording interim conversations between either the calling or the called party and a third party
H04M3/60:	. Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
H04M3/62:	. . Keyboard equipment in key telephone systems H04M9/00K1
H04M3/64:	. . Arrangements for signalling the number or class of the calling line to the operator
H04M5/00:	Manual exchanges
H04M5/02:	. Constructional details
H04M5/04:	. Arrangements for indicating calls or supervising connections for calling or clearing
H04M5/06:	. . affording automatic call distribution
H04M5/08:	. using connecting means other than cords
H04M5/10:	. using separate plug for each subscriber
H04M5/12:	. Ringing or otherwise calling substations
H04M5/14:	. Applications of speech amplifiers
H04M5/16:	. with means for reducing interference; with means for reducing effects due to line faults
H04M5/18:	. Arrangements for signalling the class or number of called or calling line from one exchange to another
H04M5/20:	. . Number-indicating arrangements for incoming lines
H04M7/00:	Interconnection arrangements between switching centres
H04M7/00B:	. Interconnection between telephone networks and data networks
H04M7/00B2:	. . where voice calls cross both networks
H04M7/00B4:	. . where voice calls remain entirely in the telephone network
H04M7/00C:	. Details of application programming interfaces [API for telephone networks; Arrangements which combine a telephonic communication equipment and a computer, i.e. computer telephony integration [CPI] arrangements]
H04M7/00C2:	. . [N: First party call control architectures]
H04M7/00C4:	. . [N: Computer Telephony Resource Boards]
H04M7/00C6:	. . [N: Details of Application Programming Interfaces]
H04M7/00D:	. [N: Services and arrangements where telephone services are combined with data services (arrangements which combine a telephonic equipment and a computer H04M7/00C)]
H04M7/00D10:	. . where the data service is provided by a stream of packets which are rendered in real time by the receiving terminal audio streaming or audio streaming details of combined audio and video streaming H04M7/00M26 [M1012]
H04M7/00D12:	. . [N: where the data service is a text-based messaging service (H04M7/00D16 takes precedence)]
H04M7/00D12D:	. . . [N: where the text-based messaging service is an instant messaging service]
H04M7/00D12S:	. . . [N: where the text-based messaging service is a Short Message Service]
H04M7/00D14:	. . [N: where the data service is a multimedia messaging service]
H04M7/00D16:	. . [N: where the data service is an electronic mail service]
H04M7/00D18:	. . [N: Services where the data services network provides a telephone service in addition or as an alternative, e.g. for backup purposes, to the telephone service provided by the telephone services network]
H04M7/00D2:	. . [N: Collaboration services where a computer is used for data transfer and the telephone is used for telephonic communication]
H04M7/00D4:	. . [N: Click to dial services]
H04M7/00D6:	. . [N: Notification or handling of incoming calls by a computer]
H04M7/00D8:	. . [N: where the data service is an information service]
H04M7/00M:	. Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol VolP), including next generation networks with a packet-switched transport layer (H04L65/00 takes precedence; aspects not specific to the type of network H04M3/00; special services in those networks H04M3/42
H04M7/00M10:	. . [N: Details of interworking different session control protocols, ie.g. Session Initiation Protocol and H.323]
H04M7/00M12:	. . [N: Details of network layer or session control protocols, i.e. protocol modifications with regard to standardised protocols]
H04M7/00M12H:	. . . [N: where the session control protocol is H.323]
H04M7/00M12S:	. . . [N: where the session control protocol is SIP]
H04M7/00M14:	. . Speech codec negotiation H04L65/10S1 takes precedence
H04M7/00M16:	. . [N: Details of addressing, directories or routing tables]
H04M7/00M18:	. . [N: Details of quality control specific to voice transmission, in particular bandwidth availability, latency, jitter or packet loss control (quality of speech monitoring H04M3/22K; routing of packets H04L12/56C; flow control H04L12/56D)]
H04M7/00M18C:	. . . [N: Handling of overload; Prevention of congestion]
H04M7/00M2:	. . [N: Details of network equipment, e.g. hardware details such as Advanced Telecom Computing Architecture of software details such as object-oriented programming interfaces]
H04M7/00M20:	. . [N: Details or registration, admission or status]
H04M7/00M22:	. . [N: Security; Fraud detection; Fraud prevention]
H04M7/00M24:	. . [N: Network operation, administration, maintenance, or provisioning]
H04M7/00M24M:	. . . [N: Network monitoring; Error detection; Error recovery; Network testing]
H04M7/00M24P:	. . . [N: Network planning or provisioning]
H04M7/00M26:	. . [N: Audio streaming or audio streaming details of combined audio and video streaming]
H04M7/00M28:	. .  where the telephone service is a videotelephony or videoconferencing service (PSTN/ISDN-based multimedia conference systems: H04M3/56)
H04M7/00M4:	. . [N: characterised by their non-standardised network architectures]
H04M7/00M4H:	. . . [N: where the network comprises a gatekeeper]
H04M7/00M4S:	. . . [N: where the network comprises a session initiation protocol server]
H04M7/00M6:	. . [N: where the network is a peer-to-peer network]
H04M7/00M8:	. . [N: Details of access arrangements to the networks(where the access arrangement is a PSTN/ISDN access H04M7/12H2L)]
H04M7/00M8R:	. . . [N: comprising a residential gateway, e.g. those which provide an adapter for POTS or ISDN terminals]
H04M7/00P:	. in systems involving PBX or KTS networks
H04M7/00S:	. [N: signalling arrangements in networks]
H04M7/00T:	. Trunk circuits
H04M7/06:	. using auxiliary connections for control or supervision , e.g. where the auxiliary connection is a signalling system number 7 link
H04M7/06N:	. . [N: where the telephone network is a network other than PSTN/ISDN]
H04M7/06P:	. . where the auxiliary connection is via an Internet Protocol network interworking of signalling system number 7 (SS7) with Internet Protocol-based session control protocols H04M7/12H12H, H04M7/12H12S
H04M7/08:	. for phantom working phantom working in transmission of digital information H04L5/20
H04M7/12:	. for working between exchanges having different types of switching equipment, e.g. power-driven and step by step, decimal and non-decimal, circuit-switched and packet-switched, i.e. gateway arrangements
H04M7/12H:	. . [N: where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks]
H04M7/12H10:	. . . [N: Details of gateway equipment]
H04M7/12H10G:	. . . . [N: where the switching fabric and the switching logic are decomposed such as in Media Gateway Control]
H04M7/12H12:	. . . [N: Interworking of session control protocols]
H04M7/12H12H:	. . . . [N: where the session control protocols comprise H.323 and SS7]
H04M7/12H12S:	. . . . [N: where the session control protocols comprise SIP and SS7]
H04M7/12H14:	. . . [N: Methods and means to improve the telephone service quality, e.g. reservation, prioritisation or admission control]
H04M7/12H16:	. . . [N: Details of addressing, directories or routing tables]
H04M7/12H18:	. . . [N: Details of finding and selecting a gateway for a particular call]
H04M7/12H2:	. . . [N: Details of network access arrangements or protocols]
H04M7/12H20:	. . . [N: Details of providing call progress tones or announcements]
H04M7/12H22:	. . . [N: Details of dual tone multiple frequency signalling]
H04M7/12H2C:	. . . . [N: where a cable TV network is used as an access to the PSTN/ISDN]
H04M7/12H2L:	. . . . [N: where the PSTN/ISDN access is used as an access to networks other than PSTN/ISDN (access arrangements to networks other than PSTN/ISDN H04M7/00M8; access arrangements to public data networks H04L12/28P1)]
H04M7/12H4:	. . . [N: Details of core network interconnection arrangements]
H04M7/12H4M:	. . . . [N: where the packet-switched network is an Internet Protocol Multimedia System-type network]
H04M7/12H4W:	. . . . where one of the core networks is a wireless network
H04M7/12H6:	. . . [N: where PSTN/ISDN interconnects two networks other than PSTN/ISDN]
H04M7/12H8:	. . . [N: where a network other than PSTN/ISDN interconnects two PSTN/ISDN networks]
H04M7/14:	. in systems involving main and subordinate switching centres
H04M7/16:	. in systems employing carrier frequencies
H04M9/00:	Interconnection arrangements not involving centralised switching
H04M9/00A:	. Two-way communication systems between a limited number of parties
H04M9/00K:	. with subscriber controlled access to a line, i.e. key telephone systems
H04M9/00K1:	. . Transmission of control signals from or to the key telephone set; signalling equipment at key telephone set, e.g. keyboard or display equipment keyboard equipment in semi-automatic systems H04M3/62
H04M9/00K3:	. . with subscriber controlled access to an exchange line
H04M9/00K3L:	. . . Exchange line circuits subscriber line circuits H04M3/00L
H04M9/00K3R:	. . . wherein the key telephone sets are star-connected to a central unit by a limited number of lines
H04M9/00K5:	. . Multiplex systems
H04M9/02:	. involving a common line for all parties
H04M9/02A:	. . Multiplex systems
H04M9/02A1:	. . . Time division multiplex systems, e.g. loop systems
H04M9/02A2:	. . . Frequency division multiplex systems
H04M9/04:	. involving a separate line for each pair of parties
H04M9/06:	. involving combinations of interconnecting lines
H04M9/08:	. Two-way loud-speaking telephone systems with means for suppressing echoes or otherwise conditioning for one or other direction of traffic
H04M9/08C:	. . using echo cancellers echo cancellers per se H04B3/23
H04M9/08D:	. . using digital techniques H04M9/08C takes precedence
H04M9/08F:	. . using different frequency bands for transmitting and receiving paths for line transmission in general H04B3/21; using phase shifting arrangements
H04M9/10:	. . with switching of direction of transmission by voice frequency
H04M11/00:	Telephonic communication systems adapted for combination with other electrical systems
H04M11/00A:	. with telemetering systems telemetering in general G08C
H04M11/00A1:	. . using recorded signals, e.g. speech
H04M11/00B:	. with remote control systems remote control in general G08C
H04M11/02:	. with bell or annunciator systems
H04M11/02A:	. . Paging systems personal calling arrangements or devices G08B3/10B; selective calling networks H04Q7/08
H04M11/02B:	. . Door telephones adapted for television H04N7/18D3
H04M11/02C:	. . Annunciator systems for hospitals
H04M11/04:	. with fire, police, burglar, or other alarm systems
H04M11/04B:	. . using recorded signals, e.g. speech
H04M11/06:	. Simultaneous speech and telegraphic or other data transmission over the same conductors
H04M11/06B:	. . using different frequency bands for speech and other data
H04M11/06C:	. . Data transmission during pauses in telephone conversation
H04M11/06D:	. . Telephone sets adapted for data transmision
H04M11/06E:	. . using time division multiplex techniques; integrated services digital networks H04Q11/04S
H04M11/08:	. adapted for optional reception of entertainment or informative matter
H04M11/08B:	. . using a television receiver, e.g. viewdata system
H04M11/10:	. with dictation recording and playback systems
H04M13/00:	Party-line systems
H04M15/00:	Arrangements for metering, time-control or time indication [N: ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP]
H04M15/02:	. Severing connection after predetermined time
H04M15/04:	. Recording calls [N: , or communications] in printed, perforated or other permanent form
H04M15/06:	. . Recording class or number of calling [N: , i.e. A-party] or called party [N: , i.e. B-party]
H04M15/07:	. [N: Split billing, i.e. both A-party and B-party charged for the communication]
H04M15/08:	. Metering calls to called party [N: , i.e. B-party charged for the communication]
H04M15/09:	. [N: Third party charged communications]
H04M15/10:	. Metering calls from calling party; [N: , i.e. A-party charged for the communication]
H04M15/12:	. . Discriminative metering [N: , charging or billing]
H04M15/14:	. . . according to class of calling party
H04M15/16:	. . . according to connection obtained
H04M15/18:	. . . according to duration of the call [N: , or the communication]
H04M15/20:	. . . . Operator`s time recording or indicating arrangements
H04M15/22:	. . . according to time of day
H04M15/24:	. . . Preventing metering of tax-free calls to certain lines, e.g. to fire or ambulance stations
H04M15/26:	. . with a meter [N: or performing charging or billing] at the exchange controlled by an operator
H04M15/28:	. with meter at substation [N: or with calculation of charges at terminal]
H04M15/30:	. . the meter [N: or calculation of charges] not being controlled from an exchange
H04M15/31:	. [N: Distributed metering or calculation of charges]
H04M15/32:	. [N: Charging, billing or] metering arrangements for satellites or concentrators which connect one or more exchange lines with a group of local lines
H04M15/34:	. [N: Charging, billing or] metering arrangements for private branch exchanges
H04M15/36:	. [N: Charging, billing or] metering arrangements for party-lines
H04M15/38:	. [N: Charging, billing or] metering by apparatus other than mechanical step-by-step counter type
H04M15/39:	. [N: Arrangements for preventing metering, charging or billing]
H04M15/41:	. [N: Billing record details, i.e. parameters, identifiers, structure of call data record [CDR]]
H04M15/42:	. [N: Dynamic individual rates per user]
H04M15/43:	. [N: Billing software details]
H04M15/44:	. [N: Augmented, consolidated or itemized billing statement or bill presentation]
H04M15/46:	. [N: Real-time negotiation between users and providers or operators]
H04M15/47:	. [N: Fraud detection or prevention means]
H04M15/48:	. [N: Secure or trusted billing, e.g. trusted elements or encryption]
H04M15/49:	. [N: Connection to several service providers]
H04M15/50:	. [N: for cross-charging network operators]
H04M15/51:	. [N: for resellers, retailers or service providers]
H04M15/52:	. [N: for operator independent billing system]
H04M15/53:	. [N: using mediation]
H04M15/54:	. [N: for revenue sharing]
H04M15/55:	. [N: for hybrid networks]
H04M15/56:	. [N: for VoIP communications ]
H04M15/57:	. [N: for integrated multimedia messaging subsystem [IMS]]
H04M15/58:	. [N: based on statistics of usage or network monitoring]
H04M15/59:	. [N: based on real time]
H04M15/60:	. [N: based on actual use of network resources]
H04M15/61:	. [N: based on the service used]
H04M15/62:	. [N: based on trigger specification]
H04M15/63:	. [N: based on the content carried by the session initiation protocol [SIP] messages]
H04M15/64:	. [N: On-line charging system [OCS]]
H04M15/65:	. [N: Off-line charging system]
H04M15/66:	. [N: Policy and charging system]
H04M15/67:	. [N: Transmitting arrangements for sending billing related information]
H04M15/68:	. [N: Payment of value-added services]
H04M15/70:	. [N: Administration or customization aspects; Counter-checking correct charges]
H04M15/705:	. . [N: Account settings, e.g. limits or numbers or payment]
H04M15/71:	. . [N: Modifying recharging resources]
H04M15/715:	. . [N: Activating new subscriber or card]
H04M15/72:	. . [N: by the user]
H04M15/725:	. . [N: by the operator]
H04M15/72A:	. . . [N: using the Internet]
H04M15/72B:	. . . [N: using the user's device]
H04M15/73:	. . [N: Validating charges]
H04M15/735:	. . [N: Re-crediting user]
H04M15/74:	. . [N: Backing up]
H04M15/745:	. . [N: Customizing according to wishes of subscriber, e.g. friends or family]
H04M15/75:	. . [N: Account location specifications]
H04M15/755:	. . [N: Account identification]
H04M15/755A:	. . . [N: via service number, e.g. calling card]
H04M15/755B:	. . . [N: by SIM, e.g. smart card account in SCP, SDP or SN]
H04M15/75A:	. . . [N: Card based account, e.g. smart card, SIM card or USIM]
H04M15/75B:	. . . [N: Terminal based account]
H04M15/75C:	. . . [N: Network based account]
H04M15/76:	. . [N: Synchronization of distributed accounts]
H04M15/765:	. . [N: Linked or grouped accounts, e.g. of users or devices]
H04M15/765A:	. . . [N: shared by users]
H04M15/765B:	. . . [N: shared by technologies]
H04M15/765C:	. . . [N: for closed subscriber group [CSG]]
H04M15/77:	. . [N: involving multiple accounts per user]
H04M15/775:	. . [N: Account specifications on parallel communications]
H04M15/77A:	. . . [N: per terminal or location, e.g. mobile device with multiple directory numbers]
H04M15/77B:	. . . [N: per service, e.g. prepay or post-pay]
H04M15/77C:	. . . [N: per technology, e.g. PSTN or wireless]
H04M15/77D:	. . . [N: per card]
H04M15/78:	. . [N: Redistributing amount between accounts]
H04M15/785:	. . [N: Reserving amount on the account]
H04M15/78A:	. . . [N: dynamically]
H04M15/78B:	. . . [N: by user request]
H04M15/79:	. . [N: Virtual purses]
H04M15/80:	. [N: Rating or billing plans; Tariff determination aspects]
H04M15/80A:	. . [N: Flat-fee]
H04M15/80B:	. . [N: using class of subscriber]
H04M15/80C:	. . [N: based on quality of service [QoS]]
H04M15/80D:	. . [N: Determining tariff or charge band]
H04M15/80E:	. . [N: based on network load situation]
H04M15/80F:	. . [N: location-dependent, e.g. business or home]
H04M15/80G:	. . [N: Roaming or handoff]
H04M15/80H:	. . [N: Least cost routing]
H04M15/80H1:	. . . [N: Bidding]
H04M15/80H2:	. . . [N: Selecting cheaper transport technology for a given service]
H04M15/80H3:	. . . [N: Selecting least cost route depending on origin or type of service]
H04M15/80K:	. . [N: According to the number of recipients]
H04M15/80K1:	. . . [N: Group, conference or multi-party call]
H04M15/80K2:	. . . [N: Group MMS or SMS; Point-to-multi-point services or broadcast services]
H04M15/80L:	. . [N: involving reduced rates or discounts, e.g. time-of-day reductions or volume discounts]
H04M15/80M:	. . [N: involving increased rates, e.g. spam messaging billing differentiation]
H04M15/80N:	. . [N: Trial service, i.e. free of charge service for trial purposes]
H04M15/81:	. [N: Dynamic pricing, e.g. change of tariff during call]
H04M15/82:	. [N: Criteria or parameters used for performing billing operations]
H04M15/82B:	. . [N: Time based data metric aspects, e.g. VoIP or circuit switched packet data]
H04M15/82C:	. . [N: Data or packet based]
H04M15/82D:	. . [N: Message based]
H04M15/82E:	. . [N: Session based]
H04M15/82F:	. . [N: Access based]
H04M15/82G:	. . [N: Transaction based]
H04M15/82H:	. . [N: based on the number of used channels, e.g. bundling channels, frequencies or CDMA codes]
H04M15/82J:	. . [N: Unit based]
H04M15/82K:	. . [N: Pulse based]
H04M15/82L:	. . [N: Based on the number of used services, e.g. call forwarding or call barring]
H04M15/82M:	. . [N: Event based]
H04M15/82P:	. . [N: Money or currency based]
H04M15/82Q:	. . [N: Charging for signaling or unsuccessful connection]
H04M15/83:	. [N: Notification aspects]
H04M15/835:	. . [N: Time or frequency of notifications, e.g. Advice of Charge [AoC]]
H04M15/835A:	. . . [N: before establishing a communication]
H04M15/835B:	. . . [N: during the communication]
H04M15/835C:	. . . [N: after the end of the communication]
H04M15/835D:	. . . [N: in regular intervals]
H04M15/835E:	. . . [N: Dynamic change of the length or frequency of the notification interval ]
H04M15/84:	. . [N: Types of notifications]
H04M15/84A:	. . . [N: Announcement, e.g. IVR dialogue]
H04M15/84B:	. . . [N: Message, e.g. SMS]
H04M15/84C:	. . . [N: optical, e.g. icon]
H04M15/84D:	. . . [N: Tone, e.g. beeper]
H04M15/85:	. . [N: characterised by the type of condition triggering a notification]
H04M15/85A:	. . . [N: Determined tariff]
H04M15/85B:	. . . [N: Low balance or limit reached]
H04M15/85C:	. . . [N: Calculate maximum communication time or volume]
H04M15/85D:	. . . [N: Available credit]
H04M15/85E:	. . . [N: Successful event]
H04M15/85F:	. . . [N: Unsuccessful event]
H04M15/85G:	. . . [N: Cumulative charges]
H04M15/85H:	. . . [N: Request users acknowledgement prior to use]
H04M15/86:	. . [N: Recipients of the notification]
H04M15/86A:	. . . [N: multiple parties, e.g. multi party AOC]
H04M15/86B:	. . . [N: a predetermined or undetermined destination, e.g. notifying a prepaid accounting server of a successful delivery of a service]
H04M15/88:	. [N: Provision for limiting connection, or expenditure]
H04M15/88A:	. . [N: for continuing the call beyond the limit using allow grace]
H04M15/88B:	. . [N: for continuing the call beyond the limit using an alternative, e.g. alternative account]
H04M15/88C:	. . [N: linked escalation limits, i.e. establish, first or second limit]
H04M15/88D:	. . [N: limit per application]
H04M15/88E:	. . [N: limit per terminal]
H04M15/88F:	. . [N: limit per user or user related number]
H04M15/88G:	. . [N: severing connection after predetermined time or data]
H04M15/90:	. [N: using Intelligent Networks [IN] or Advanced Intelligent Networks [AIN]]
H04M15/93:	. [N: using near field or similar technologies]
H04M17/00:	Prepayment [N: of wireline communication systems, wireless communication systems or] telephone systems (using a coded card to authorise calls from a telephone set H04M1/675)
H04M17/00D:	. [N: Disposable prepaid communication devices]
H04M17/01:	. [N: Cocot systems, i.e. private ownership of payphones]
H04M17/02:	. Coin-freed or check-freed systems, [N: e.g. mobile- or card-operated phones, public telephones or booths]
H04M17/02B:	. . Circuit arrangements
H04M17/02C:	. . Constructional features
H04M17/10:	. [N: Account details or usage]
H04M17/10A:	. . [N: using SIMs (USIMs) or calling cards]
H04M17/10B:	. . [N: using commercial credit or debit cards ]
H04M17/20:	. [N: with provision for recharging the prepaid account or card, or for credit establishment]
H04M17/20A:	. . [N: automatic recharging with predetermined amount at threshold]
H04M17/20B:	. . [N: selecting interactively a payment method]
H04M17/20B1:	. . . [N: cash-based recharging, i.e. physical input of coins or bank notes]
H04M17/20C:	. . [N: on-line recharging e.g. cashless]
H04M17/20C1:	. . . [N: by calling a service number, e.g. interactive voice response [IVR] or menu]
H04M17/20C2:	. . . [N: by sending a message, e.g. SMS, MMS or EMS]
H04M17/20C3:	. . . [N: using signaling, e.g. USSD, UUS or DTMF]
H04M17/20C4:	. . . [N: using WAP or Internet , i.e. including electronic payment, e.g. e-cash ]
H04M17/30:	. [N: using a code ]
H04M17/30A:	. . [N: Code input or reading ]
H04M17/30A1:	. . . [N: from communication terminal display]
H04M17/30A2:	. . . [N: from material cards, i.e. magnetic stripe card]
H04M17/30A3:	. . . [N: Optical code recognition [OCR], e.g. bar code reader ]
H04M17/30A4:	. . . [N: Wireless codes, e.g. Bluetooth or RFID]
H04M17/30A5:	. . . [N: using public code readers, e.g. public payment or recharge point]
H04M17/30B:	. . [N: Code type e.g. alphanumeric code, bar code.]
H04M17/30C:	. . [N: Code management]
H04M17/35:	. [N: Pay as you go ]
H04M19/00:	Current supply arrangements for telephone systems
H04M19/00B:	. Current supply source at the exchanger providing current to substations
H04M19/00B2:	. . Arrangements for compensation of the DC flux in line transformers
H04M19/00B4:	. . Feeding arrangements without the use of line transformers
H04M19/00B6:	. . Circuits for increasing the range of current supply source
H04M19/00B8:	. . Using DC/DC converters DC/DC converters per se H02M3/28
H04M19/02:	. providing ringing current or supervisory tones, e.g. dialling tone, busy tone
H04M19/02B:	. . by reversing the polarity of the current at the exchange
H04M19/02C:	. . Arrangements for interrupting the ringing current
H04M19/04:	. . ringing-current generated at substation
H04M19/04D:	. . . Encoding the ringing signal, i.e. providing distinctive or selective ringing capability
H04M19/04L:	. . . with variable loudness of the ringing tone, e.g. variable envelope or amplitude of ring signal
H04M19/04L2:	. . . . according to the level of ambient noise
H04M19/04P:	. . . Call privacy arrangements, e.g. timely inhibiting the ring signal
H04M19/04T:	. . . Vibrating means for incoming calls
H04M19/04V:	. . . Arrangements providing optical indication of the incoming call, e.g. flasher circuits
H04M19/06:	. Current supply source at subordinate switching centre charged from main exchange
H04M19/08:	. Current supply source at substation
H04M99/00:	Subject matter not provided for in other groups of this subclass