Series Q Recommendations : Q.1 to Q.499

[Q.1] Recommendation Q.1 (1988) - Signal receivers for manual working
[Q.2] Recommendation Q.2 (1988) - Signal receivers for automatic and semi-automatic working, used for manual working
[Q.4] Recommendation Q.4 (1988) - Automatic switching functions for use in national networks
[Q.5] Recommendation Q.5 (1988) - Advantages of semi-automatic service in the international telephone service
[Q.6] Recommendation Q.6 (1988) - Advantages of international automatic working
[Q.7] Recommendation Q.7 (1988) - Signalling systems to be used for international automatic and semi-automatic telephone working
[Q.8] Recommendation Q.8 (1988) - Signalling systems to be used for international manual and automatic working on analogue leaed circuits
[Q.9] Recommendation Q.9 (1988) - Vocabulary of switching and signalling terms
[Q.11ter] Rec. Q.11 ter (see Rec. E.165)
[Q.12] Recommendation Q.12 (1988) - Overflow - Alternative routing - Rerouting - Automatic repeat attempt
[Q.14] Recommendation Q.14 (1988) - Means to control the number of satellite links in an international telephone connection
[Q.20] Recommendation Q.20 (1988) - Comparative advantages of "in-band" and "out-band" systems
[Q.21] Recommendation Q.21 (1988) - Systems recommended for out-band signalling
[Q.22] Recommendation Q.22 (1988) - Frequencies to be used for in-band signalling
[Q.23] Recommendation Q.23 (1988) - Technical features of push-button telephone sets
[Q.24] Recommendation Q.24 (1988) - Multifrequency push-button signal reception
[Q.25] Recommendation Q.25 (1988) - Splitting arrangements and signal recognition times in "in-band" signalling systems
[Q.26] Recommendation Q.26 (1988) - Direct access to the international network from the national network
[Q.27] Recommendation Q.27 (1988) - Transmission of the answer signal
[Q.28] Recommendation Q.28 (1988) - Determination of the moment of the called subscriber's answer in the automatic service
[Q.29] Recommendation Q.29 (1988) - Causes of noise and ways of reducing noise in telephone exchanges
[Q.30] Recommendation Q.30 (1988) - Improving the reliability of contacts in speech circuits
[Q.31] Recommendation Q.31 (1988) - Noise in a national 4-wire automatic exchange
[Q.32] Recommendation Q.32 (1988) - Reduction of the risk of instability by switching means
[Q.33] Recommendation Q.33 (1988) - Protection against effects of faulty transmission on groups of circuits
[Q.35] Recommendation Q.35 (03/98) - Technical characteristics of tones for the telephone service
[Q.44] Recommendation Q.44 (1988) - Attenuation distortion
[Q.45] Recommendation Q.45 (1984) - Transmission characteristics of an analogue international exchange
[Q45bis] Recommendation Q.45bis (1988) - Transmission characteristics of an analogue international exchange
[Q.48] Recommendation Q.48 (1988) - Demand assignment signalling systems
[Q.50] Recommendation Q.50 (06/97) - Signalling between circuit multiplication equipments (CME) and international switching centres (ISC)
[Q.65] Recommendation Q.65 (06/97) - The unified functional methodology for the characterization of services and network capabilities
[Q.68] Recommendation Q.68 (03/93) - Overview of methodology for developing management services
[Q.71] Recommendation Q.71 (03/93) - ISDN Circuit mode switched bearer services
[Q.72] Recommendation Q.72 (03/93) - Stage 2 description for packet mode
[Q.76] Recommendation Q.76 (02/95) - Service procedures for universal personal telecommunication - functional modelling and information flows
[Q.80] Recommendation Q.80 (1988) - Introduction to Stage 2 service descriptions for supplementary services
[Q.81.1] Recommendation Q.81.1 (1988) - Stage 2 description for number identification supplementary services - Direct dialling-in
[Q.81.2] Recommendation Q.81, Sections 2 and 8 (02/92) - Stage 2 description for number identification supplementary services (Addenda to Rec. Q.81) - Section 2 - Multiple subscriber number; Section 8 - Sub-addressing (SUB)
[Q.81.3] Recommendation Q.81, Sections 3 and 5 (09/91) - Stage 2 description for number identification supplementary services (Modifications to Rec. Q.81)
[Q.81.7] Recommendation Q.81.7 (06/97) - Stage 2 description for number identification supplementary services - Malicious call identification (Note)
[Q.82.1] Recommendation Q.82.1 - Stage 2 description for call offering supplementary services - Call transfer (Note)
[Q.82.2] Recommendation Q.82, Clauses 2 and 3 (03/93) - Stage 2 description for call offering supplementary services; Clause 2 - Call forwarding; Clause 3 - Call deflection
[Q.82.4] Recommendation Q.82.4 (1988) - Stage 2 description for call offering supplementary services - Line hunting
[Q.82.7] Recommendation Q.82.7 (07/96) - Stage 2 description for call offering supplementary services: Explicit call transfer
[Q.83.1] Recommendation Q.83, Sections 1 and 4 (09/91) - Stage 2 description for call completion supplementary services (Modifications and addenda to: Recommendation Q.83)
[Q.83.2] Recommendation Q.83, Section 2 (02/92) - Stage 2 description for call completion supplementary services (Modifications to: Recommendation Q.83) - Section 2 - Call hold
[Q.83.3] Recommendation Q.83.3 - Stage 2 description for call completion supplementary services - Completion of call to busy subscriber (Note)
[Q.84.1] Recommendation Q.84, Clause 1 (03/93) - Stage 2 description for multiparty supplementary services
[Q.84.2] Recommendation Q.84, Section 2 (10/95) - Stage 2 description for multiparty supplementary services - Section 2 - Three-party service
[Q.85.1] Recommendation Q.85, Sections 1 and 3 (02/92) - Stage 2 description for community of interest supplementary services (Modifications and addenda to Rec. Q.85) - Section 1 - Closed User Group; Section 3 - Multi-level Precedence and Preemption
[Q.85.6] Recommendation Q.85, Clause 6 (02/95) - Stage 2 description for community of interest supplementary services - Global virtual network service
[Q.85.6 Annex A] Annex A (07/96) to Recommendation Q.85.6 - Stage 2 description for community of interest supplementary services: Global Virtual Network Service (GVNS) - Annex A: Service procedures and information flows based on Intelligent Network CS-1 capabilities
[Q.86.1] Recommendation Q.86.1 - Stage 2 description for charging supplementary services - Credit card call (Note)
[Q.86.2] Recommendation Q.86, Clause 2 (10/95) - Stage 2 description for charging supplementary services - advice of charge
[Q.86.3] Recommendation Q.86, Clause 3 (03/93) - Stage 2 description for charging supplementary services; Reverse charging (Rev)
[Q.86.4] Recommendation Q.86.4 (06/97) - Stage 2 description for charging supplementary services: International Freephone Service (IFS)
[Q.86.7] Recommendation Q.86, Clause 7 (10/95) - Stage 2 description for charging supplementary services: Clause 7 - International Telecommunication Charge Card (ITCC)
[Q.87.1] Recommendation Q.87, Clause 1 (03/93) - Stage 2 description for additional information transfer supplementary services; Clause 1 - User-to-user signalling (UUS)
[Q.87.2] Recommendation Q.87.2 - Stage 2 description for additional information transfer supplementary services - User signalling bearer services (Note)
[Q.101] Recommendation Q.101 (1988) - Facilities provided in international semi-automatic working
[Q.102] Recommendation Q.102 (1988) - Facilities provided in international automatic working
[Q.103] Recommendation Q.103 (1988) - Numbering used
[Q.104] Recommendation Q.104 (1988) - Language digit or discriminating digit
[Q.105] Recommendation Q.105 (1988) - National (significant) number
[Q.106] Recommendation Q.106 (1988) - The sending-finished signal
[Q.107] Recommendation Q.107 (1988) - Standard sending sequence of forward address information
[Q.107bis] Recommendation Q.107bis (03/93) - Analysis of forward address information for routing
[Q.108] Recommendation Q.108 (1988) - One-way or both-way operation of international circuits
[Q.109] Recommendation Q.109 (1988) - Transmission of the answer signal in international exchanges
[Q.110] Recommendation Q.110 (1988) - General aspects of the utilization of standardized CCITT Signalling Systems on PCM links
[Q.112] Recommendation Q.112 (1988) - Signal levels and signal receiver sensitivity
[Q.113] Recommendation Q.113 (1988) - Connection of signal receivers in the circuit
[Q.114] Recommendation Q.114 (1988) - Typical transmission requirements for signal senders and receivers
[Q.115] Recommendation Q.115 (06/97) - Logic for the control of echo control devices
[Q.116] Recommendation Q.116 (1988) - Indication given to the outgoing operator or calling subscriber in case of an abnormal condition
[Q.117] Recommendation Q.117 (1988) - Alarms for technical staff and arrangements in case of faults
[Q.118] Recommendation Q.118 (09/97) - Abnormal conditions - Special release arrangements
[Q.118bis] Recommendation Q.118bis (1988) - Indication of congestion conditions at transit exchanges
[Q.120] Recommendation Q.120 (1988) - (Signalling System No. 4) Definition and function of signals
[Q.121] Recommendation Q.121 (1988) - (Signalling System No. 4) Signal code
[Q.122] Recommendation Q.122 (1988) - (Signalling System No. 4) Signal sender
[Q.123] Recommendation Q.123 (1988) - (Signalling System No. 4) Signal receiver
[Q.124] Recommendation Q.124 (1988) - (Signalling System No. 4) Splitting arrangements
[Q.125] Recommendation Q.125 (1988) - (Signalling System No. 4) Speed of switching in international exchanges
[Q.126] Rec. Q.126 (Signalling System No. 4) (see Rec. Q.107 bis)
[Q.127] Recommendation Q.127 (1988) - (Signalling System No. 4) Release of registers
[Q.128] Recommendation Q.128 (1988) - (Signalling System No. 4) Switching to the speech position
[Q.129] Recommendation Q.129 (1988) - (Signalling System No. 4) Maximum duration of a blocking signal
[Q.130] Recommendation Q.130 (1988) - (Signalling System No. 4) Special arrangements in case of failures in the sequence of signals
[Q.131] Recommendation Q.131 (1988) - (Signalling System No. 4) Abnormal release conditions of the outgoing register causing release of the international circuit
[Q.133] Recommendation Q.133 (1988) - (Signalling System No. 4) Numbering for access to automatic measuring and testing devices
[Q.134] Recommendation Q.134 (1988) - (Signalling System No. 4) Routine testing of equipment (local maintenance)
[Q.135] Recommendation Q.135 (1988) - (Signalling System No. 4) Principles of rapid transmission testing equipment
[Q.136] Recommendation Q.136 (1988) - (Signalling System No. 4) Loop transmission measurements
[Q.137] Recommendation Q.137 (1988) - (Signalling System No. 4) Automatic testing equipment
[Q.138] Recommendation Q.138 (1988) - (Signalling System No. 4) Instruments for checking equipment and measuring signals
[Q.139] Recommendation Q.139 (1988) - (Signalling System No. 4) Manual testing
[Q.140] Recommendation Q.140 (1988) - (Signalling System No. 5) Definition and function of signals
[Q.141] Recommendation Q.141, Clause 2 (03/93) - (Signalling System No. 5) - Signal code for line signalling - Line signalling
[Q.142] Recommendation Q.142 (1988) - (Signalling System No. 5) Double seizing with both-way operation
[Q.143] Recommendation Q.143 (1988) - (Signalling System No. 5) Line signal sender
[Q.144] Recommendation Q.144 (03/93) - (Signalling System No. 5) Clause 2 - Line signalling; 2.4 - Line signal receiver
[Q.145] Recommendation Q.145 (1988) - (Signalling System No. 5) Splitting arrangements
[Q.146] Recommendation Q.146 (1988) - (Signalling System No. 5) Speed of switching in international exchanges
[Q.151] Recommendation Q.151 (1988) - (Signalling System No. 5) Signal code for register signalling
[Q.152] Recommendation Q.152 (1988) - (Signalling System No. 5) End-of-pulsing conditions - Register arrangements concerning ST (end-of-pulsing) signal
[Q.153] Recommendation Q.153 (1988) - (Signalling System No. 5) Multifrequency signal sender
[Q.154] Recommendation Q.154 (1988) - (Signalling System No. 5) Multifrequency signal receiver
[Q.155] Rec. Q.155 (Signalling System No. 5) (see Rec. Q.107 bis)
[Q.156] Recommendation Q.156 (1988) - (Signalling System No. 5) Release of international registers
[Q.157] Recommendation Q.157 (1988) - (Signalling System No. 5) Switching to the speech position
[Q.161] Rec. Q.161 (Signalling System No. 5) (see Rec. Q.107 bis)
[Q.162] Recommendation Q.162 (1988) - (Signalling System No. 5) Routing testing of equipment (local maintenance)
[Q.163] Recommendation Q.163 (1988) - (Signalling System No. 5) Manual testing
[Q.164] Recommendation Q.164 (1988) - (Signalling System No. 5) Test equipment for checking equipment and signals
[Q.180] Recommendation Q.180 (1988) - Interworking of systems No. 4 and No. 5
[Q.251] Recommendation Q.251 (1988) - (Signalling System No. 6 - Functional description of the signalling system) General
[Q.252] Recommendation Q.252 (1988) - (Signalling System No. 6 - Functional description of the signalling system) Signal transfer time definitions
[Q.253] Recommendation Q.253 (1988) - (Signalling System No. 6 - Functional description of the signalling system) Association between signalling and speech networks
[Q.254] Recommendation Q.254 (1988) - (Signalling System No. 6 - Definition and function of signals) Telephone signals
[Q.255] Recommendation Q.255 (1988) - (Signalling System No. 6 - Definition and function of signals) Signalling-system-control signals
[Q.256] Recommendation Q.256 (1988) - (Signalling System No. 6 - Definition and function of signals) Management signals
[Q.257] Recommendation Q.257 (1988) - (Signalling System No. 6 - Signal unit formats and codes) General
[Q.258] Recommendation Q.258 (1988) - (Signalling System No. 6 - Signal unit formats and codes) Telephone signals
[Q.259] Recommendation Q.259 (1988) - (Signalling System No. 6 - Signal unit formats and codes) Signalling-system-control signals
[Q.260] Recommendation Q.260 (1988) - (Signalling System No. 6 - Signal unit formats and codes) Management signals
[Q.261] Recommendation Q.261 (1988) - (Signalling System No. 6 - Signalling procedures) Normal call set-up
[Q.262] Rec. Q.262 (Signalling System No. 6) (see Rec. Q.107 bis)
[Q.263] Recommendation Q.263 (1988) - (Signalling System No. 6 - Signalling procedures) Double seizing with both-way operation
[Q.264] Recommendation Q.264 (1988) - (Signalling System No. 6 - Signalling procedures) Potential for automatic repeat attempt and re-routing
[Q.265] Recommendation Q.265 (1988) - (Signalling System No. 6 - Signalling procedures) Speed of switching and signal transfer in international exchanges
[Q.266] Recommendation Q.266 (1988) - (Signalling System No. 6 - Signalling procedures) Blocking and unblocking sequences and control of quasi-associated signalling
[Q.267] Recommendation Q.267 (1988) - (Signalling System No. 6 - Signalling procedures) Unreasonable and superfluous messages
[Q.268] Recommendation Q.268 (1988) - (Signalling System No. 6 - Signalling procedures) Release of international connections and associated equipment
[Q.271] Recommendation Q.271 (1988) - (Signalling System No. 6 - Continuity check of the speech path) General
[Q.272] Recommendation Q.272 (1988) - (Signalling System No. 6 - Signalling link) Requirements for the signalling data link
[Q.273] Recommendation Q.273 (1988) - (Signalling System No. 6 - Signalling link) Data transmission rate
[Q.274] Recommendation Q.274 (1988) - (Signalling System No. 6 - Signalling link) Transmission methods; Modem and interface requirements
[Q.275] Recommendation Q.275 (1988) - (Signalling System No. 6 - Signalling link) Data channel failure detection
[Q.276] Recommendation Q.276 (1988) - (Signalling System No. 6 - Signalling link) Service dependability
[Q.277] Recommendation Q.277 (1988) - (Signalling System No. 6 - Signalling link) Error control
[Q.278] Recommendation Q.278 (1988) - (Signalling System No. 6 - Signalling link) Synchronization
[Q.279] Recommendation Q.279 (1988) - (Signalling System No. 6 - Signalling link) Drift compensation
[Q.285] Recommendation Q.285 (1988) - (Signalling System No. 6 - Signal traffic characteristics) Signal priority categories
[Q.286] Recommendation Q.286 (1988) - (Signalling System No. 6 - Signal traffic characteristics) Signalling channel loading and queuing delays
[Q.287] Recommendation Q.287 (1988) - (Signalling System No. 6 - Signal traffic characteristics) Signal transfer time requirements
[Q.291] Recommendation Q.291 (1988) - (Signalling System No. 6 - Security arrangements) General
[Q.292] Recommendation Q.292 (1988) - (Signalling System No. 6 - Security arrangements) Reserve facilities provided
[Q.293] Recommendation Q.293 (1988) - (Signalling System No. 6 - Security arrangements) Intervals at which security measures are to be invoked
[Q.295] Recommendation Q.295 (1988) - (Signalling System No. 6 - Testing and maintenance) Overall tests of Signalling System No. 6
[Q.296] Recommendation Q.296 (1988) - (Signalling System No. 6 - Testing and maintenance) Monitoring and maintenance of the common signalling channel
[Q.297] Recommendation Q.297 (1988) - (Signalling System No. 6) Network management
[Q.300] Recommendation Q.300 (1988) - (Signalling System No. 6) Interworking between CCITT Signalling System No. 6 and national common channel signalling systems
[Q.310] Recommendation Q.310 (1988) - (Signalling System R1) Definition and function of signals
[Q.311] Recommendation Q.311 (1988) - (Signalling System R1) 2600 Hz line signalling
[Q.312] Recommendation Q.312 (1988) - (Signalling System R1) 2600 Hz line signal sender (Transmitter)
[Q.313] Recommendation Q.313 (1988) - (Signalling System R1) 2600 Hz line signal receiving equipment
[Q.314] Recommendation Q.314 (1988) - (Signalling System R1) PCM line signalling
[Q.315] Recommendation Q.315 (1988) - (Signalling System R1) PCM line signal sender (Transmitter)
[Q.316] Recommendation Q.316 (1988) - (Signalling System R1) PCM line signal receiver
[Q.317] Recommendation Q.317 (1988) - (Signalling System R1) Further specification clauses relative to line signalling
[Q.318] Recommendation Q.318 (1988) - (Signalling System R1) Double seizing with both-way operation
[Q.319] Recommendation Q.319 (1988) - (Signalling System R1) Speed of switching in international exchanges
[Q.320] Recommendation Q.320 (1988) - (Signalling System R1) Signal code for register signalling
[Q.321] Recommendation Q.321 (1988) - (Signalling System R1) End-of-pulsing conditions - Register arrangements concerning ST signal
[Q.322] Recommendation Q.322 (1988) - (Signalling System R1) Multifrequency signal sender
[Q.323] Recommendation Q.323 (1988) - (Signalling System R1) Multifrequency signal receiving equipment
[Q.324] Recommendation Q.324 (1988) - (Signalling System R1) Analysis of address information for routing
[Q.325] Recommendation Q.325 (1988) - (Signalling System R1) Release of registers
[Q.326] Recommendation Q.326 (1988) - (Signalling System R1) Switching to the speech position
[Q.327] Recommendation Q.327 (1988) - (Signalling System R1) General arrangements
[Q.328] Recommendation Q.328 (1988) - (Signalling System R1) Routing testing of equipment (Local maintenance)
[Q.329] Recommendation Q.329 (1988) - (Signalling System R1) Manual testing
[Q.330] Recommendation Q.330 (1988) - (Signalling System R1) Automatic transmission and signalling testing
[Q.331] Recommendation Q.331 (1988) - (Signalling System R1) Test equipment for checking equipment and signals
[Q.332] Recommendation Q.332 (1988) - (Signalling System R1) Interworking
[Q.400] Recommendation Q.400 (1988) - (Signalling System R2) Forward line signals
[Q.411] Recommendation Q.411 (1988) - (Signalling System R2) Line signalling code
[Q.412] Recommendation Q.412 (1988) - (Signalling System R2) Clauses for exchange line signalling equipment
[Q.414] Recommendation Q.414 (1988) - (Signalling System R2) Signal sender
[Q.415] Recommendation Q.415 (1988) - (Signalling System R2) Signal receiver
[Q.416] Recommendation Q.416 (1988) - (Signalling System R2) Interruption control
[Q.421] Recommendation Q.421 (1988) - (Signalling System R2) Digital line signalling code
[Q.422] Recommendation Q.422 (1988) - (Signalling System R2) Clauses for exchange line signalling equipment
[Q.424] Recommendation Q.424 (1988) - (Signalling System R2) Protection against the effects of faulty transmission
[Q.430] Recommendation Q.430 (1988) - (Signalling System R2) Conversion between analogue and digital versions of system R2 line signalling
[Q.440] Recommendation Q.440 (1988) - (Signalling System R2 - Interregister signalling) General
[Q.441] Recommendation Q.441 (1988) - (Signalling System R2 - Interregister signalling) Signalling code
[Q.442] Recommendation Q.442 (1988) - (Signalling System R2 - Interregister signalling) Pulse transmission of backward signals A-3, A-4, A-6 or A-15
[Q.450] Recommendation Q.450 (1988) - (Signalling System R2 - Multifrequency signalling equipment) - General
[Q.451] Recommendation Q.451 (1988) - (Signalling System R2 - Multifrequency signalling equipment) - Definitions
[Q.452] Recommendation Q.452 (1988) - (Signalling System R2 - Multifrequency signalling equipment) - Requirements relating to transmission conditions
[Q.454] Recommendation Q.454 (1988) - (Signalling System R2 - Multifrequency signalling equipment) - The sending part of the multifrequency signalling equipment
[Q.455] Recommendation Q.455 (1988) - (Signalling System R2 - Multifrequency signalling equipment) - The receiving part of the multifrequency equipment
[Q.457] Recommendation Q.457 (1988) - (Signalling System R2) Range of interregister signalling
[Q.458] Recommendation Q.458 - (1988) - (Signalling System R2) Reliability of interregister signalling
[Ann-ABC] Annexes A, B and C to Recs. Q.440-Q.458 (1988)
[Q.460] Recommendation Q.460 (1988) - (Signalling System R2) Normal call set-up procedures for international working
[Q.462] Recommendation Q.462 (1988) - (Signalling System R2) Signalling between the outgoing international R2 register and an incoming R2 register in an international exchange
[Q.463] Recommendation Q.463 (1988) - (Signalling System R2) Signalling between the outgoing international R2 register and an incoming R2 register in a national exchange in the destination country
[Q.464] Recommendation Q.464 (1988) - (Signalling System R2) Signalling between the outgoing international R2 register and the last incoming R2 register
[Q.465] Recommendation Q.465 (1988) - (Signalling System R2) Particular cases
[Q.466] Recommendation Q.466 (1988) - (Signalling System R2) Supervision and release of the call
[Q.468] Rec. Q.468 (Signalling System R2) (see Recs. Q.107 and Q.107bis)
[Q.470] Recommendation Q.470 (1988) - (Signalling System R2) At an incoming R2 register situated in a transfer exchange
[Q.471] Recommendation Q.471 (1988) - (Signalling System R2 ) At the last incoming R2 register situated in the exchange to which the called subscriber is connected
[Q.472] Recommendation Q.472 (1988) - (Signalling System R2) At the last incoming R2 register situated in a transit exchange
[Q.473] Recommendation Q.473 (1988) - (Signalling System R2) Use of end-of-pulsing signal I-15 in international working
[Q.474] Recommendation Q.474 (1988) - (Signalling System R2) Use of Group B signals
[Q.475] Recommendation Q.475 (1988) - (Signalling System R2) Normal release of outgoing and incoming R2 registers
[Q.476] Recommendation Q.476 (1988) - (Signalling System R2) Abnormal release of outgoing and incoming R2 registers
[Q.478] Recommendation Q.478 (1988) - (Signalling System R2) Relay and regeneration of R2 interregister signals by an outgoing R2 register in a transit exchange
[Q.479] Recommendation Q.479 (1988) - (Signalling System R2) Echo-suppressor control - Signalling requirements
[Q.480] Recommendation Q.480 (1988) - (Signalling System R2) Miscellaneous procedures
[Q.490] Recommendation Q.490 (1988) - (Signalling System R2) Testing and maintenance
[Annex A-R2] Annex A to ITU-T Recs. Q.400-Q.490 (1988) - Specifications of Signalling System R2 - Provision of a forward-transfer signalling facility

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