Automatic or semi-automatic exchanges

HELECTRICITY H04Electric communication H04MTELEPHONIC COMMUNICATION

H04M3/00Automatic or semi-automatic exchanges

H04M3/002Applications of echo suppressors or cancellers in telephonic connections H04M3/005Interface circuits for subscriber lines H04M3/007Access interface units for simultaneous transmission of speech and data H04M3/02Ringing or otherwise calling substations H04M3/04calling signal supplied from final selector H04M3/06calling signal supplied from subscriber's line circuit H04M3/08Indicating faults in circuits or apparatus H04M3/085Fault locating arrangements H04M3/10Providing fault or trouble signals H04M3/12Marking faulty circuits "busy" Enabling equipment to disengage itself from faulty circuits; Using redundant circuits; Response of a circuit, apparatus or system to an error H04M3/14Signalling existence of persistent "off-hook" condition H04M3/16with lock-out or secrecy provision in party-line systems H04M3/18with means for reducing interference or noise with means for reducing effects due to line faults with means for protecting lines H04M3/20with means for interrupting existing connections with means for breaking-in on conversations H04M3/205Eavesdropping prevention - indication of insecurity of line or network H04M3/22Supervisory, monitoring, management H04M3/2209for lines also used for data transmission H04M3/2218Call detail recording H04M3/2227Quality of service monitoring H04M3/2236Quality of speech transmission monitoring H04M3/2245Management of the local loop plant H04M3/2254in networks H04M3/2263Network management H04M3/2272Subscriber line supervision circuits H04M3/2281Call monitoring H04M3/229Wire identification arrangements; Number assignment determination H04M3/24with provision for checking the normal operation H04M3/241for stored program controlled exchanges H04M3/242Software testing H04M3/244for multiplex systems H04M3/245for ISDN systems H04M3/247Knowledge-based maintenance systems H04M3/248for metering arrangements or prepayment telephone systems H04M3/26with means for applying test signals or for measuring H04M3/28Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor H04M3/30for subscriber's lines , for the local loop H04M3/301Circuit arrangements at the subscriber's side of the line H04M3/302using modulation techniques for copper pairs H04M3/303and using PCM multiplexers H04M3/304and using xDSL modems H04M3/305testing of physical copper line parameters H04M3/306for frequencies above the voice frequency H04M3/307using ringback H04M3/308Craftsperson test terminals H04M3/32for lines between exchanges H04M3/323for the arrangements providing the connection (test connection, test call, call simulation) H04M3/326for registers and translators H04M3/34Testing for cross-talk H04M3/36Statistical metering H04M3/362Traffic simulation H04M3/365Load metering of control unit H04M3/367Traffic or load control H04M3/38Graded-service arrangements H04M3/382using authorisation codes or passwords H04M3/385using speech signals H04M3/387using subscriber identification cards H04M3/40Applications of speech amplifiers H04M3/42Systems providing special services or facilities to subscribers H04M3/42008Systems for anonymous communication between parties H04M3/42017Customized ring-back tones H04M3/42025Calling or Called party identification service H04M3/42034Calling party identification service H04M3/42042Notifying the called party of information on the calling party H04M3/42051where the notification is included in the ringing tone H04M3/42059Making use of the calling party identifier H04M3/42068where the identifier is used to access a profile H04M3/42076where the identifier is a Uniform Resource Locator H04M3/42085Called party identification service H04M3/42093Notifying the calling party of information on the called or connected party H04M3/42102Making use of the called party identifier H04M3/4211where the identifier is used to access a profile H04M3/42119where the identifier is a Uniform Resource Locator H04M3/42127Systems providing several special services or facilities from groups H04M3/42008 - H04M3/58 H04M3/42136Administration or customisation of services H04M3/42144by service provider H04M3/42153by subscriber H04M3/42161via computer interface H04M3/4217Managing service interactions H04M3/42178by downloading data to substation equipment H04M3/42187Lines and connections with preferential service H04M3/42195Arrangements for calling back a calling subscriber H04M3/42204Arrangements at the exchange for service or number selection by voice H04M3/42212Call pickup H04M3/42221Conversation recording systems H04M3/42229Personal communication services H04M3/42238in systems with telephone lines with multiple users H04M3/42246where 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 H04M3/42255with the subscriber having a personal network-independent number H04M3/42263where the same subscriber uses different terminals H04M3/42272whereby the subscriber registers to the terminals for personalised service provision H04M3/4228in networks H04M3/42289with carrierprovider selection by subscriber H04M3/42297with number portability H04M3/42306Number translation services H04M3/42314in private branch exchanges H04M3/42323PBX's with CTI arrangements H04M3/42331Direct inward dialling H04M3/4234Remote access to features of PBX or home telephone systems-teleworking in a PBX H04M3/42348Location-based services which utilize the location information of a target H04M3/42357where the information is provided to a monitoring entity such as a potential calling party or a call processing server H04M3/42365Presence services providing information on the willingness to communicate or the ability to communicate in terms of media capability or network connectivity H04M3/42374where the information is provided to a monitoring entity such as a potential calling party or a call processing server H04M3/42382Text-based messaging services in telephone networks such as PSTN/ISDN H04M3/42391where the subscribers are hearing-impaired persons H04M3/424Arrangements for automatic redialling H04M3/428Arrangements for placing incoming calls on hold H04M3/4281when the called subscriber is connected to a data network using his telephone line H04M3/4283Call holding circuits H04M3/4285Notifying, informing or entertaining a held party while on hold H04M3/4286Notifying a held subscriber when his held call is removed from hold H04M3/4288Notifying a called subscriber of an incoming call during an ongoing call H04M3/432Arrangements for calling a subscriber at a specific time H04M3/436Arrangements for screening incoming calls H04M3/4365based on information specified by the calling party H04M3/44Additional connecting arrangements for providing access to frequently-wanted subscribers H04M3/46Arrangements for calling a number of substations in a predetermined sequence until an answer is obtained H04M3/465Arrangements for simultaneously calling a number of substations until an answer is obtained H04M3/48Arrangements for recalling a calling subscriber when the wanted subscriber ceases to be busy H04M3/487Arrangements for providing information services H04M3/4872Non-interactive information services H04M3/4874Intercept announcements H04M3/4876Time announcements H04M3/4878Advertisement messages H04M3/493Interactive information services H04M3/4931Directory assistance systems H04M3/4933with operator assistance H04M3/4935Connection initiated by DAS system H04M3/4936Speech interaction details H04M3/4938comprising a voice browser which renders and interprets H04M3/50Centralised arrangements for answering calls Centralised arrangements for recording messages for absent or busy subscribers; Centralised arrangements for recording messages H04M3/51Centralised call answering arrangements requiring operator intervention H04M3/5108Secretarial services H04M3/5116for emergency applications H04M3/5125with remote located operators H04M3/5133Operator terminal details H04M3/5141Details of processing calls and other types of contacts in an unified manner H04M3/515Night service systems H04M3/5158in combination with automated outdialling systems H04M3/5166in combination with interactive voice response systems or voice portals H04M3/5175Call or contact centers supervision arrangements H04M3/5183Call or contact centers with computer-telephony arrangements H04M3/5191interacting with the Internet H04M3/52Arrangements for routing dead number calls to operators H04M3/523with call distribution or queueing H04M3/5231with call back arrangements H04M3/5232Call distribution algorithms H04M3/5233Operator skill based call distribution H04M3/5234Uniform load distribution H04M3/5235Dependent on call type or called number [DNIS] H04M3/5236Sequential or circular distribution H04M3/5237Interconnection arrangements between ACD systems H04M3/5238with waiting time or load prediction arrangements H04M3/527Centralised call answering arrangements not requiring operator intervention H04M3/53Centralised arrangements for recording incoming messages H04M3/5307for recording messages comprising any combination of audio and non-audio components H04M3/5315where the non-audio components are still images or video H04M3/5322for recording text messages H04M3/533Voice mail systems H04M3/53308Message originator indirectly connected to the message centre H04M3/53316Messaging centre selected by message originator H04M3/53325Interconnection arrangements between voice mail systems H04M3/53333Message receiving aspects H04M3/53341Message reply H04M3/5335Message type or catagory H04M3/53358Message preview H04M3/53366Message disposing or creating aspects H04M3/53375Message broadcasting H04M3/53383Message registering commands or announcements; Greetings H04M3/53391dependent on calling party H04M3/537Arrangements for indicating the presence of a recorded message, whereby the presence information might include a preview or summary of the message H04M3/54Arrangements for diverting calls for one subscriber to another predetermined subscriber H04M3/541based on information specified by the calling party H04M3/543Call deflection H04M3/545with loop avoiding arrangements H04M3/546in private branch exchanges H04M3/548with remote control H04M3/56Arrangements for connecting several subscribers to a common circuit H04M3/561by multiplexing H04M3/562where the conference facilities are distributed H04M3/563User guidance or feature selection H04M3/564whereby the feature is a sub-conference H04M3/565relating to time schedule aspects H04M3/566relating to a participants right to speak H04M3/567Multimedia conference systems H04M3/568audio processing specific to telephonic conferencing H04M3/569using the instant speaker's algorithm H04M3/58Arrangements 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 H04M3/60Semi-automatic systems H04M3/62Keyboard equipment H04M3/64Arrangements for signalling the number or class of the calling line to the operator