I.110 
 | 
[Withdrawn] Preamble and general structure of the I-Series Recommendations for the integrated services digital network (ISDN)
		  Deleted after its content became technically out of date
  | 
I.111 
 | 
[Withdrawn] Relationship with other Recommendations relevant to ISDNs
		  Deleted after its content became technically out of date
  | 
I.112 
 | 
Vocabulary of terms for ISDNs
		 
  | 
I.113 
 | 
Vocabulary of terms for broadband aspects of ISDN
		 
  | 
I.114 
 | 
Vocabulary of terms for universal personal telecommunication
		 
  | 
I.120 
 | 
Integrated services digital networks (ISDNs)
		 
  | 
I.121 
 | 
Broadband aspects of ISDN
		 
  | 
I.122 
 | 
Framework for frame mode bearer services
		 
  | 
I.130 
 | 
Method for the characterization of telecommunication services supported by an ISDN and network capabilities of an ISDN
		 
  | 
I.140 
 | 
Attribute technique for the characterization of telecommunication services supported by an ISDN and network capabilities of an ISDN
		 
  | 
I.141 
 | 
ISDN network charging capabilities attributes
		 
  | 
I.150 
 | 
B-ISDN asynchronous transfer mode functional characteristics
		 
  | 
I.200 
 | 
Guidance to the I.200-series of Recommendations
		 
  | 
I.210 
 | 
Principles of telecommunication services supported by an ISDN and the means to describe them
		 
  | 
I.211 
 | 
B-ISDN service aspects
		 
  | 
I.220 
 | 
Common dynamic description of basic telecommunication services
		 
  | 
I.221 
 | 
Common specific characteristics of services
		 
  | 
I.230 
 | 
Definition of bearer service categories
		 
  | 
I.231.1 
 | 
Circuit-mode bearer service categories : Circuit-mode 64 kbit/s unrestricted, 8 kHz structured bearer service
		 
  | 
I.231.2 
 | 
Circuit-mode bearer service categories : Circuit-mode 64 kbit/s, 8 kHz structured bearer service usable for speech information transfer
		 
  | 
I.231.3 
 | 
Circuit-mode bearer service categories : Circuit-mode 64 kbit/s, 8 kHz structured bearer service usable for 3.1 kHz audio information transfer
		 
  | 
I.231.4 
 | 
Circuit-mode bearer service categories : Circuit-mode, alternate speech / 64 kbit/s unrestricted, 8 kHz structured bearer service
		 
  | 
I.231.5 
 | 
Circuit-mode bearer service categories : Circuit-mode 2 x 64 kbit/s unrestricted, 8 kHz structured bearer service
		 
  | 
I.231.6 
 | 
Circuit-mode bearer service categories : Circuit-mode 384 kbit/s unrestricted, 8 kHz structured bearer service
		 
  | 
I.231.7 
 | 
Circuit-mode bearer service categories : Circuit-mode 1536 kbit/s unrestricted, 8 kHz structured bearer service
		 
  | 
I.231.8 
 | 
Circuit-mode bearer service categories : Circuit-mode 1920 kbit/s unrestricted, 8 kHz structured bearer service
		 
  | 
I.231.9 
 | 
Circuit-mode bearer service categories : Circuit-mode 64 kbit/s 8 kHz structured multi-use bearer service
		 
  | 
I.231.10 
 | 
Circuit-mode bearer service categories : Circuit-mode multiple-rate unrestricted 8 kHz structured bearer service
		 
  | 
I.232.1 
 | 
Packet-mode bearer services categories : Virtual call and permanent virtual circuit bearer service category
		 
  | 
I.232.2 
 | 
Packet-mode bearer services categories : Connectionless bearer service category
		  Empty Recommendation
This service has only been identified and requires further study
  | 
I.232.3 
 | 
Packet-mode bearer services categories : User signalling bearer service category (USBS)
		 
  | 
I.233.1 
 | 
ISDN frame relaying bearer service
		 
  | 
I.233.2 
 | 
ISDN frame switching bearer service
		  
  | 
I.240 
 | 
Definition of teleservices
		 
  | 
I.241.1 
 | 
Teleservices supported by an ISDN : Telephony
		 
  | 
I.241.2 
 | 
Teleservices supported by an ISDN : Teletex
		 
  | 
I.241.3 
 | 
Teleservices supported by an ISDN : Telefax 4
		 
  | 
I.241.4 
 | 
Teleservices supported by an ISDN : Mixed mode
		 
  | 
I.241.5 
 | 
Teleservices supported by an ISDN : Videotex
		 
  | 
I.241.6 
 | 
Teleservices supported by an ISDN : Telex
		 
  | 
I.241.7 
 | 
Teleservices supported by an ISDN : Telephony 7 kHz teleservice
		 
  | 
I.241.8 
 | 
Teleservices supported by an ISDN : Teleaction stage one service description
		 
  | 
I.250 
 | 
Definition of supplementary services
		 
  | 
I.251.1 
 | 
Number identification supplementary services : Direct-dialling-In
		 
  | 
I.251.2 
 | 
Number identification supplementary services : Multiple Subscriber Number
		 
  | 
I.251.3 
 | 
Number identification supplementary services : Calling Line Identification Presentation
		 
  | 
I.251.4 
 | 
Number identification supplementary services : Calling Line Identification Restriction
		 
  | 
I.251.5 
 | 
Number identification supplementary services : Connected Line Identification Presentation (COLP)
		 
  | 
I.251.6 
 | 
Number identification supplementary services : Connected Line Identification Restriction (COLR)
		 
  | 
I.251.7 
 | 
Number identification supplementary services : Malicious call Identification
		 
  | 
I.251.8 
 | 
Number identification supplementary services : Sub-addressing supplementary service
		 
  | 
I.251.9 
 | 
Number identification supplementary services : Calling name identification presentation
		 
  | 
I.251.10 
 | 
Number identification supplementary services : Calling name identification restriction
		 
  | 
I.252.1 
 | 
Call offering supplementary services : Call Transfer
		 
  | 
I.252.2 
 | 
Call offering supplementary services : Call Forwarding Busy
		 
  | 
I.252.3 
 | 
Call offering supplementary services : Call Forwarding No Reply
		 
  | 
I.252.4 
 | 
Call offering supplementary services : Call Forwarding Unconditional
		 
  | 
I.252.5 
 | 
Call offering supplementary services : Call Deflection
		 
  | 
I.252.6 
 | 
Call offering supplementary services : Line Hunting (LH)
		 
  | 
I.252.7 
 | 
Call offering supplementary services : Explicit call transfer
		 
  | 
I.253.1 
 | 
Call completion supplementary services : Call waiting (CW) supplementary service
		 
  | 
I.253.2 
 | 
Call completion supplementary services : Call Hold
		 
  | 
I.253.3 
 | 
Call completion supplementary services : Completion of calls to busy subscribers
		 
  | 
I.253.4 
 | 
Call completion supplementary services : Completion of calls on no reply
		 
  | 
I.254.1 
 | 
Multiparty supplementary services : Conference calling (CONF)
		 
  | 
I.254.2 
 | 
Multiparty supplementary services : Three-Party Supplementary Service
		 
  | 
I.254.5 
 | 
Multiparty supplementary services : Meet-me conference
		 
  | 
I.255.1 
 | 
Community of interest supplementary services : Closed User Group
		 
  | 
I.255.2 
 | 
Community of interest supplementary services : Support of Private Numbering Plans
		 
  | 
I.255.3 
 | 
Community of interest supplementary services : Multi-level precedence and preemption service (MLPP)
		 
  | 
I.255.4 
 | 
Community of interest supplementary services : Priority service
		 
  | 
I.255.5 
 | 
Community of interest supplementary services : Outgoing call barring
		 
  | 
I.256.1 
 | 
Charging supplementary services : Credit card calling (CRED)
		  Empty Recommendation. This subject has only been identified and is left for further study.
  | 
I.256.2a 
 | 
Charging supplementary services : Advice of charge: charging information at call set-up time (AOC-S)
		 
  | 
I.256.2b 
 | 
Charging supplementary services : Advice of charge: charging information during the call (AOC-D)
		 
  | 
I.256.2c 
 | 
Charging supplementary services : Advice of charge: charging information at the end of the call (AOC-E)
		 
  | 
I.256.3 
 | 
Charging supplementary services : Reverse charging
		 
  | 
I.257.1 
 | 
Additional information transfer supplementary services : User-to-User Signalling (UUS)
		 
  | 
I.258.1 
 | 
Mobility and modification supplementary services : Terminal portability (TP)
		 
  | 
I.258.2 
 | 
Mobility and modification supplementary services : In-call modification (IM)
		 
  | 
I.259.1 
 | 
Screening supplementary services : Address screening (ADS)
		 
  | 
I.310 
 | 
ISDN - Network functional principles
		 
  | 
I.311 
 | 
B-ISDN general network aspects
		 
  | 
I.312 
 | 
Principles of intelligent network architecture
		  This Recommendation is published with the double number Q.1201 and I.312
  | 
I.313 
 | 
B-ISDN network requirements
		 
  | 
I.320 
 | 
ISDN protocol reference model
		 
  | 
I.321 
 | 
B-ISDN protocol reference model and its application
		  Covering note, May 2000: Erratum
  | 
I.322 
 | 
Generic protocol reference model for telecommunication networks
		 
  | 
I.324 
 | 
ISDN network architecture
		 
  | 
I.325 
 | 
Reference configurations for ISDN connection types
		 
  | 
I.326 
 | 
Functional architecture of transport networks based on ATM
		 
  | 
I.327 
 | 
B-ISDN functional architecture
		 
  | 
I.328 
 | 
Intelligent network - Service plane architecture
		  This Recommendation is published with the double number Q.1202 and I.328
  | 
I.329 
 | 
Intelligent network - Global functional plane architecture
		  This Recommendation is published with the double number Q.1203 and I.329. For more details see I.329
  | 
I.330 
 | 
ISDN numbering and addressing principles
		 
  | 
I.331 
 | 
The international public telecommunication numbering plan
		  This Recommendation is published under alias number E.164
  | 
I.332 
 | 
[Withdrawn] Numbering principles for interworking between ISDNs and dedicated networks with different numbering plans
		 
  | 
I.333 
 | 
Terminal selection in ISDN
		 
  | 
I.334 
 | 
Principles relating ISDN numbers/sub-addresses to the OSI reference model network layer addresses
		 
  | 
I.335 
 | 
[Withdrawn] ISDN routing principles
		  Superseded by ITU-T E.172 (1992)
  | 
I.340 
 | 
ISDN connection types
		 
  | 
I.350 
 | 
General aspects of quality of service and network performance in digital networks, including ISDNs
		 
  | 
I.351 
 | 
Relationships among ISDN, Internet protocol, and GII performance Recommendations
		 
  | 
I.352 
 | 
Network performance objectives for connection processing delays in an ISDN
		 
  | 
I.353 
 | 
Reference events for defining ISDN and B-ISDN performance parameters
		 
  | 
I.354 
 | 
Network performance objectives for packet-mode communication in an ISDN
		 
  | 
I.355 
 | 
ISDN 64 kbit/s connection type availability performance
		 
  | 
I.356 
 | 
B-ISDN ATM layer cell transfer performance
		 
  | 
I.357 
 | 
B-ISDN semi-permanent connection availability
		 
  | 
I.358 
 | 
Call processing performance for switched virtual channel connections (VCCs) in a B-ISDN
		 
  | 
I.359 
 | 
Accuracy and dependability of ISDN 64 kbit/s circuit-mode connection types
		 
  | 
I.361 
 | 
B-ISDN ATM layer specification
		 
  | 
I.362 
 | 
[Withdrawn] B-ISDN ATM adaptation layer (AAL) functional description
		  Deleted, since the service classes defined therein were no longer appropriate and were in conflict with F-Series Recommendations
  | 
I.363 
 | 
[Withdrawn] B-ISDN ATM adaptation layer (AAL) specification
		  This Recommendation was subdivided into ITU-T Recs. I.363.1 to I.363.5 when revised in 1996
  | 
I.363.1 
 | 
B-ISDN ATM Adaptation Layer specification : Type 1 AAL
		 
  | 
I.363.2 
 | 
B-ISDN ATM Adaptation Layer specification : Type 2 AAL
		 
  | 
I.363.3 
 | 
B-ISDN ATM Adaptation Layer specification : Type 3/4 AAL
		 
  | 
I.363.5 
 | 
B-ISDN ATM Adaptation Layer specification : Type 5 AAL
		 
  | 
I.364 
 | 
Support of the broadband connectionless data bearer service by the B-ISDN
		 
  | 
I.365.1 
 | 
B-ISDN ATM adaptation layer sublayers : Frame relaying service specific convergence sublayer (FR-SSCS)
		 
  | 
I.365.2 
 | 
B-ISDN ATM adaptation layer sublayers : Service-specific coordination function to provide the connection-oriented network service
		 
  | 
I.365.3 
 | 
B-ISDN ATM adaptation layer sublayers : Service-specific coordination function to provide the connection-oriented transport service
		 
  | 
I.365.4 
 | 
B-ISDN ATM adaptation layer sublayers : Service-specific convergence sublayer for HDLC applications
		 
  | 
I.366.1 
 | 
Segmentation and Reassembly Service Specific Convergence Sublayer for the AAL type 2
		 
  | 
I.366.2 
 | 
AAL type 2 service specific convergence sublayer for narrow-band services
		 
  | 
I.370 
 | 
Congestion management for the ISDN frame relaying bearer service
		 
  | 
I.371 
 | 
Traffic control and congestion control in B-ISDN
		 
  | 
I.371.1 
 | 
[Withdrawn] Guaranteed frame rate ATM transfer capability
		 
  | 
I.372 
 | 
Frame relaying bearer service network-to-network interface requirements
		 
  | 
I.373 
 | 
[Withdrawn] Network capabilities to support universal personal telecommunication (UPT)
		  Deleted in 2022 as a consequence of the suppression of the Universal Personal Telecommunication (UPT) service
  | 
I.374 
 | 
[Withdrawn] Framework Recommendation on "network capabilities to support multimedia services"
		  Replaced by ITU-T I.375.1 and ITU-T I.375.2
  | 
I.375.1 
 | 
Network capabilities to support multimedia services : General aspects
		 
  | 
I.375.2 
 | 
Network capabilities to support multimedia services : Example of multimedia retrieval service class - Video-on-demand service using an ATM-based network
		 
  | 
I.375.3 
 | 
Network capabilities to support multimedia services : Example of multimedia distribution service class - Switched digital broadcasting
		 
  | 
I.376 
 | 
ISDN network capabilities for the support of the teleaction service
		 
  | 
I.377 
 | 
Network requirements to support charging and accounting in B-ISDN
		 
  | 
I.378 
 | 
Traffic control and congestion control at the ATM Adaptation Layer type 2
		 
  | 
I.380 
 | 
Internet protocol data communication service - IP packet transfer and availability performance parameters
		  This Recommendation was first approved and published as I.380, and then renumbered as Y.1540 on 2000-03-10 without further modification 
  | 
I.381 
 | 
ATM adaptation layer (AAL) Performance
		 
  | 
I.410 
 | 
General aspects and principles relating to Recommendations on ISDN user-network interfaces
		 
  | 
I.411 
 | 
ISDN user-network interfaces - Reference configurations
		 
  | 
I.412 
 | 
ISDN user-network interfaces - Interface structures and access capabilities
		 
  | 
I.413 
 | 
B-ISDN user-network interface
		 
  | 
I.414 
 | 
Overview of Recommendations on layer 1 for ISDN and B-ISDN customer accesses
		 
  | 
I.420 
 | 
Basic user-network interface
		 
  | 
I.421 
 | 
Primary rate user-network interface
		 
  | 
I.430 
 | 
Basic user-network interface - Layer 1 specification
		 
  | 
I.431 
 | 
Primary rate user-network interface - Layer 1 specification
		 
  | 
I.432 
 | 
[Withdrawn] B-ISDN user-network interface - Physical layer specification
		 
  | 
I.432.1 
 | 
B-ISDN user-network interface - Physical layer specification : General characteristics
		 
  | 
I.432.2 
 | 
B-ISDN user-network interface - Physical layer specification : 155 520 kbit/s and 622 080 kbit/s operation
		 
  | 
I.432.3 
 | 
B-ISDN user-network interface - Physical layer specification : 1544 kbit/s and 2048 kbit/s operation
		 
  | 
I.432.4 
 | 
B-ISDN user-network interface - Physical layer specification : 51 840 kbit/s operation
		 
  | 
I.432.5 
 | 
B-ISDN user-network interface - Physical layer specification : 25 600 kbit/s operation
		 
  | 
I.460 
 | 
Multiplexing, rate adaption and support of existing interfaces
		 
  | 
I.464 
 | 
Multiplexing, rate adaption and support of existing interfaces for restricted 64 kbit/s transfer capability
		 
  | 
I.470 
 | 
Relationship of terminal functions to ISDN
		 
  | 
I.480 
 | 
1+1 protection switching for cell-based physical layer
		 
  | 
I.500 
 | 
General structure of the ISDN interworking Recommendations
		 
  | 
I.501 
 | 
Service interworking
		 
  | 
I.510 
 | 
Definitions and general principles for ISDN interworking
		 
  | 
I.511 
 | 
ISDN-to-ISDN layer 1 internetwork interface
		 
  | 
I.515 
 | 
Parameter exchange for ISDN interworking
		 
  | 
I.520 
 | 
General arrangements for network interworking between ISDNs
		 
  | 
I.525 
 | 
Interworking between networks operating at bit rates less than 64 kbit/s with 64 kbit/s-based ISDN and B-ISDN
		 
  | 
I.530 
 | 
Network interworking between an ISDN and a public switched telephone network (PSTN)
		 
  | 
I.555 
 | 
Frame Relaying Bearer Service interworking
		 
  | 
I.570 
 | 
Public/private ISDN interworking
		 
  | 
I.571 
 | 
Connection of VSAT based private networks to the public ISDN
		 
  | 
I.572 
 | 
VSAT interconnection with the PSTN
		 
  | 
I.580 
 | 
General arrangements for interworking between B-ISDN and 64 kbit/s based ISDN
		 
  | 
I.581 
 | 
General arrangements for B-ISDN interworking
		 
  | 
I.601 
 | 
General maintenance principles of ISDN subscriber access and subscriber installation
		 
  | 
I.602 
 | 
Application of maintenance principles to ISDN subscriber installations
		  Renumbered M.3602 when revised in 1992
  | 
I.603 
 | 
Application of maintenance principles to ISDN basic accesses
		  Renumbered M.3603 when revised in 1992
  | 
I.604 
 | 
Application of maintenance principles to ISDN primary rate accesses
		  Renumbered M.3604 when revised in 1992
  | 
I.605 
 | 
Application of maintenance principles to static multiplexed ISDN basic accesses
		  Renumbered M.3605 when revised in 1992
  | 
I.610 
 | 
B-ISDN operation and maintenance principles and functions
		 
  | 
I.620 
 | 
[Withdrawn] Frame relay operation and maintenance principles and functions
		  This Recommendation was deleted on 2004-06-08, the technical area being now covered by ITU-T Rec. X.151 (2003)
  | 
I.630 
 | 
ATM protection switching
		 
  | 
I.731 
 | 
Types and general characteristics of ATM equipment
		 
  | 
I.732 
 | 
Functional characteristics of ATM equipment
		 
  | 
I.733 
 | 
Voice on ATM circuit multiplication equipment
		 
  | 
I.741 
 | 
Interworking and interconnection between ATM and switched telephone networks for the transmission of speech, voiceband data and audio signals
		 
  | 
I.751 
 | 
Asynchronous transfer mode management of the network element view
		 
  | 
I.Imp751 
 | 
Implementor's Guide for Recommendation I.751
		 
  | 
I.761 
 | 
Inverse multiplexing for ATM (IMA)
		 
  | 
I.762 
 | 
ATM over fractional physical links
		 
  | 
I.Sup1 
 | 
Generic service descriptions for ten supplementary services defined in I.250-Series Recommendations
		 
  |