ITU-T V Series Recommendations: New Documents

[ V.152 (09/10) ] - Procedures for supporting voice-band data over IP networks

jeu, 17 ao� 2011 07:39:20 GMT

Summary

Voice-band data traffic has traditionally been transported by circuit switched systems and equipment. With the advent of the networks optimized for the transport of Internet Protocol (IP), and as a result of its considerable growth and pervasive nature, more and more voice-band data traffic is expected to be carried over IP networks.

Given that voice and voice-band data services remain a significant part of telecommunications, there is a need to ensure a high quality of service for voice and voice-band data carried in part, or wholly, via IP. Recommendation ITU-T V.152 defines procedures for equipment that interconnect GSTN networks with IP networks to provide satisfactory, transparent delivery of modulated voice-band data (VBD) as encoded audio content over IP (data modems, facsimile terminals and text telephones).

Annex B defines a method that uses data signal detection and silence insertion in voiceband data that adds a means of providing bandwidth savings during transmission.

Annex C addresses a problem discovered during the implementation of ITU-T V.152 gateways with the transmission of facsimile terminals. While this issue has been resolved by an amendment to Recommendation ITU-T T.30, due to the extremely large numbers of terminals deployed in the field and the low probability that they would be corrected retroactively, it was considered pre-emptive to include a solution in an ITU-T V.152 media gateway.

This Recommendation is complementary to the modem relay and voice-band data Recommendations (Recommendations ITU-T V.150.0 and V.150.1).

This revision includes the updating of references, general editing improvements for clarity and many additional examples of call control. It also integrates changes introduced by Corrigendum 1 (2005) for clarification to clauses 7.1 and 7.1.1; by Corrigendum 2 (2006) for clarifications on the use and control of echo cancellers and the application of IETF RFC 2833 with VBD; and by Amendment 1 (2009) for new Annexes B and C.

[ V.152 (09/10) ] - Procedures for supporting voice-band data over IP networks

jeu, 17 ao� 2011 07:39:20 GMT

Summary

Annex B defines a method that uses data signal detection and silence insertion in voiceband data that adds a means of providing bandwidth savings during transmission.

This Recommendation is complementary to the modem relay and voice-band data Recommendations (Recommendations ITU-T V.150.0 and V.150.1).

[ V.Imp152 (03/11) ] - Implementors Guide for ITU-T V.152 (Procedures for supporting voice-band data over IP networks)

mer, 19 avr 2011 06:52:05 GMT

Implementors Guide for ITU-T V.152 (Procedures for supporting voice-band data over IP networks)

[ V.254 (09/10) ] - Asynchronous serial command interface for assistive and multi-functional communication devices

jeu, 23 mar 2011 08:18:51 GMT

Summary

Recommendation ITU-T V.254 is applicable to the interconnection of multi-functional communication devices (such as mobile phones) with devices intended to provide assistive capabilities for those communication devices. It defines a range of serial binary commands that comply to the format and general rules of Recommendation ITU-T V.250 via a range of suitable interfaces.

[ V.254 (09/10) ] - Asynchronous serial command interface for assistive and multi-functional communication devices

jeu, 23 mar 2011 08:18:50 GMT

Summary

[ V.153 (12/09) ] - Interworking between ITU-T T.38 and ITU-T V.152 using IP peering for real-time facsimile services

mer, 18 mai 2010 08:26:46 GMT

Summary

Recommendation ITU-T V.153 defines service interworking between two IP domains, whereby one IP domain is using voiceband data over IP (VBDoIP) transport according to Recommendation ITU‑T V.152 and the other IP domain is using facsimile relay over IP (FoIP) transport according to Recommendation ITU-T T.38. Two modes of operation are specified for the T.38‑to‑V.152 interworking function: native versus emulated interworking.

The T.38-to-V.152 interworking technology is subject of the user plane and typically located in IP‑to-IP gateway equipment, like border routers or border gateways.

[ V.153 (12/09) ] - Interworking between ITU-T T.38 and ITU-T V.152 using IP peering for real-time facsimile services

mer, 18 mai 2010 08:26:46 GMT

Summary

The T.38-to-V.152 interworking technology is subject of the user plane and typically located in IP‑to-IP gateway equipment, like border routers or border gateways.

[ V.152 (2005) Amendment 1 (03/09) ] - New Annex B - Use of data signal detection and silence insertion in voiceband data, and new Annex C on use of V.21 preamble for echo canceller control in a V.152 gateway

sam, 13 nov 2009 10:25:53 GMT

Summary

Annex B to Recommendation ITU-T V.152 defines a method that uses data signal detection and silence insertion in voiceband data that adds a means of providing bandwidth savings during transmission.

Annex C to Recommendation ITU-T V.152 addresses a problem discovered during the implementation of V.152 gateways with the transmission of facsimile terminals. While this issue has been resolved by an amendment to Recommendation ITU-T T.30, due to the extremely large numbers of terminals deployed in the field and the low probability that they would be corrected retroactively, it was considered pre-emptive to include a solution in a V.152 media gateway.

[ V.152 (2005) Amendment 1 (03/09) ] - New Annex B - Use of data signal detection and silence insertion in voiceband data, and new Annex C on use of V.21 preamble for echo canceller control in a V.152 gateway

sam, 13 nov 2009 10:25:53 GMT

Summary

Annex B to Recommendation ITU-T V.152 defines a method that uses data signal detection and silence insertion in voiceband data that adds a means of providing bandwidth savings during transmission.

[ V.34 (10/96) ] - A modem operating at data signalling rates of up to 33 600 bit/s for use on the general switched telephone network and on leased point-to-point 2-wire telephone-type circuits

sam, 22 mai 2009 14:01:19 GMT

A modem operating at data signalling rates of up to 33 600 bit/s for use on the general switched telephone network and on leased point-to-point 2-wire telephone-type circuits

[ V.42 (11/88) ] - Error-correcting procedures for DCEs using asynchronous-to-synchronous conversion

mar, 18 mai 2009 15:18:28 GMT

Error-correcting procedures for DCEs using asynchronous-to-synchronous conversion

[ V.42 (11/88) ] - Error-correcting procedures for DCEs using asynchronous-to-synchronous conversion

mar, 18 mai 2009 15:18:28 GMT

Error-correcting procedures for DCEs using asynchronous-to-synchronous conversion

[ V.32 (11/88) ] - A family of 2-wire, duplex modems operating at data signalling rates of up to 9600 bit/s for use on the general switched telephone network and on leased telephone-type circuits

mar, 18 mai 2009 15:17:20 GMT

A family of 2-wire, duplex modems operating at data signalling rates of up to 9600 bit/s for use on the general switched telephone network and on leased telephone-type circuits

[ V.32 (11/88) ] - A family of 2-wire, duplex modems operating at data signalling rates of up to 9600 bit/s for use on the general switched telephone network and on leased telephone-type circuits

mar, 18 mai 2009 15:17:20 GMT

A family of 2-wire, duplex modems operating at data signalling rates of up to 9600 bit/s for use on the general switched telephone network and on leased telephone-type circuits

[ V.28 (11/88) ] - Electrical characteristics for unbalanced double-current interchange circuits

mar, 18 mai 2009 15:14:46 GMT

Electrical characteristics for unbalanced double-current interchange circuits

[ V.28 (11/88) ] - Electrical characteristics for unbalanced double-current interchange circuits

mar, 18 mai 2009 15:14:46 GMT

Electrical characteristics for unbalanced double-current interchange circuits

[ V.25bis (11/88) ] - Automatic calling and/or answering equipment on the general switched telephone network (GSTN) using the 100-series interchange circuits

mar, 18 mai 2009 15:13:21 GMT

Automatic calling and/or answering equipment on the general switched telephone network (GSTN) using the 100-series interchange circuits

[ V.25bis (11/88) ] - Automatic calling and/or answering equipment on the general switched telephone network (GSTN) using the 100-series interchange circuits

mar, 18 mai 2009 15:13:17 GMT

Automatic calling and/or answering equipment on the general switched telephone network (GSTN) using the 100-series interchange circuits

[ V.25 (11/88) ] - Automatic answering equipment and/or parallel automatic calling equipment on the general switched telephone network including procedures for disabling of echo control devices for both manually and automatically established calls

mar, 18 mai 2009 15:11:45 GMT

Automatic answering equipment and/or parallel automatic calling equipment on the general switched telephone network including procedures for disabling of echo control devices for both manually and automatically established calls

[ V.25 (11/88) ] - Automatic answering equipment and/or parallel automatic calling equipment on the general switched telephone network including procedures for disabling of echo control devices for both manually and automatically established calls

mar, 18 mai 2009 15:11:44 GMT

[ V.24 (11/88) ] - List of definitions for interchange circuits between data terminal equipment (DTE) and data circuit-terminating equipment (DCE)

mar, 18 mai 2009 15:10:35 GMT

List of definitions for interchange circuits between data terminal equipment (DTE) and data circuit-terminating equipment (DCE)

[ V.24 (11/88) ] - List of definitions for interchange circuits between data terminal equipment (DTE) and data circuit-terminating equipment (DCE)

mar, 18 mai 2009 15:10:35 GMT

List of definitions for interchange circuits between data terminal equipment (DTE) and data circuit-terminating equipment (DCE)

[ V.14 (11/88) ] - Transmission of start-stop characters over synchronous bearer channels

mar, 18 mai 2009 15:09:12 GMT

Transmission of start-stop characters over synchronous bearer channels

[ V.14 (11/88) ] - Transmission of start-stop characters over synchronous bearer channels

mar, 18 mai 2009 15:09:12 GMT

Transmission of start-stop characters over synchronous bearer channels

[ V.13 (11/88) ] - Simulated carrier control

mar, 18 mai 2009 15:08:00 GMT

Simulated carrier control

[ V.13 (11/88) ] - Simulated carrier control

mar, 18 mai 2009 15:08:00 GMT

Simulated carrier control

[ V.110/I.463 (11/88) ] - Support of data terminal equipments (DTEs) with V-series type interfaces by an integrated services digital network (ISDN)

mar, 18 mai 2009 15:07:00 GMT

Support of data terminal equipments (DTEs) with V-series type interfaces by an integrated services digital network (ISDN)

This Recommendation is also included but not published in I series under alias number I.463

[ V.110/I.463 (11/88) ] - Support of data terminal equipments (DTEs) with V-series type interfaces by an integrated services digital network (ISDN)

mar, 18 mai 2009 15:07:00 GMT

[ V.120/I.465 (11/88) ] - Support by an ISDN of data terminal equipment with V-series type interfaces with provision for statistical multiplexing

sam, 15 mai 2009 13:42:42 GMT

Support by an ISDN of data terminal equipment with V-series type interfaces with provision for statistical multiplexing

This Recommendation is also included but not published in I series under alias number I.465

[ V.120/I.465 (11/88) ] - Support by an ISDN of data terminal equipment with V-series type interfaces with provision for statistical multiplexing

sam, 15 mai 2009 13:42:41 GMT

[ V.11/X.27 (11/88) ] - Electrical characteristics for balanced double-current interchange circuits for general use with integrated circuit equipment in the field of data communications

sam, 15 mai 2009 13:41:26 GMT

Electrical characteristics for balanced double-current interchange circuits for general use with integrated circuit equipment in the field of data communications

This Recommendation is also included but not published in X series under alias number X.27

[ V.11/X.27 (11/88) ] - Electrical characteristics for balanced double-current interchange circuits for general use with integrated circuit equipment in the field of data communications

sam, 15 mai 2009 13:41:26 GMT

[ V.10/X.26 (11/88) ] - Electrical characteristics for unbalanced double-current interchange circuits for general use with integrated circuit equipment in the field of data communications

sam, 15 mai 2009 13:40:12 GMT

Electrical characteristics for unbalanced double-current interchange circuits for general use with integrated circuit equipment in the field of data communications

This Recommendation is also included but not published in X series under alias number X.26

[ V.10/X.26 (11/88) ] - Electrical characteristics for unbalanced double-current interchange circuits for general use with integrated circuit equipment in the field of data communications

sam, 15 mai 2009 13:40:12 GMT

[ V.Imp250 (11/00) ] - Implementor's Guide to V.250

mar, 21 jui 2008 13:02:15 GMT

Implementor's Guide to V.250

[ V.Imp250 (11/00) ] - Implementor's Guide to V.250

mar, 21 jui 2008 13:02:15 GMT

Implementor's Guide to V.250

[ V.151 (05/06) ] - Procedures for the end-to-end connection of analogue PSTN text telephones over an IP network utilizing text relay

sam, 01 f�v 2008 10:10:57 GMT

The published text of this Recommendation includes the modifications introduced by the Amendement 1 approved on 2007-08-29

Summary

This Recommendation defines the inter-operation of two PSTN to IP Network gateways that facilitate the end-to-end connection of analogue text telephone terminals over an IP network utilizing text relay.

Amendment 1 introduces Annex E, which defines the RTP payload format for the transport of text as T.140 character data over IP networks, removing the need to make a reference to an historic RFC published by the IETF. It also includes minor editorial changes throughout the document to make references to the newly introduced Annex, removing references to the RFC.

[ V.151 (05/06) ] - Procedures for the end-to-end connection of analogue PSTN text telephones over an IP network utilizing text relay

sam, 01 f�v 2008 10:10:56 GMT

The published text of this Recommendation includes the modifications introduced by the Amendement 1 approved on 2007-08-29

Summary

[ V.25ter Annex A (08/96) ] - Procedure for DTE-controlled call negotiation

ven, 20 sep 2007 09:30:47 GMT

Procedure for DTE-controlled call negotiation

[ V.25ter Annex A (08/96) ] - Procedure for DTE-controlled call negotiation

ven, 20 sep 2007 09:30:47 GMT

Procedure for DTE-controlled call negotiation

[ V.110/I.463 (09/92) ] - Support of data terminal equipments with V-Series type interfaces by an integrated services digital network

mer, 03 jui 2007 08:31:32 GMT

Support of data terminal equipments with V-Series type interfaces by an integrated services digital network

This Recommendation is also included but not published in I series under alias number I.463

[ V.110/I.463 (09/92) ] - Support of data terminal equipments with V-Series type interfaces by an integrated services digital network

mer, 03 jui 2007 08:31:31 GMT

[ V.120/I.465 (09/92) ] - Support by an ISDN of data terminal equipment with V-Series type interfaces with provision for statistical multiplexing

mer, 03 jui 2007 08:29:32 GMT

Support by an ISDN of data terminal equipment with V-Series type interfaces with provision for statistical multiplexing

This Recommendation is also included but not published in I series under alias number I.465

[ V.120/I.465 (09/92) ] - Support by an ISDN of data terminal equipment with V-Series type interfaces with provision for statistical multiplexing

mer, 03 jui 2007 08:29:31 GMT

[ V.38 (03/93) ] - A 48/56/64 kbit/s data-circuit terminating equipment standardized for use on digital point-to-point leased circuits

jeu, 30 mai 2007 07:33:14 GMT

A 48/56/64 kbit/s data-circuit terminating equipment standardized for use on digital point-to-point leased circuits

[ V.11/X.27 (03/93) ] - Electrical characteristics for balanced double-current interchange circuits operating at data signalling rates up to 10 Mbit/s

jeu, 30 mai 2007 07:32:01 GMT

Electrical characteristics for balanced double-current interchange circuits operating at data signalling rates up to 10 Mbit/s

This Recommendation is also included but not published in X series under alias number X.27

[ V.42 (03/93) ] - Error-correcting procedures for DCEs using asynchronous-to-synchronous conversion

mer, 22 mai 2007 13:53:12 GMT

Error-correcting procedures for DCEs using asynchronous-to-synchronous conversion

[ V.24 (03/93) ] - List of definitions for interchange circuits between data terminal equipment (DTE) and data circuit-terminating equipment (DCE)

mer, 22 mai 2007 13:52:08 GMT

List of definitions for interchange circuits between data terminal equipment (DTE) and data circuit-terminating equipment (DCE)

[ V.18 (09/94) ] - Operational and interworking requirements for modems operating in the text telephone mode

mer, 22 mai 2007 13:51:23 GMT

Operational and interworking requirements for modems operating in the text telephone mode

[ V.34 (09/94) ] - a modem operating at data signalling rates of up to 28 800 bit/s for use on the general switched telephone network and on leased point-to-point 2-wire telephone-type circuits

sam, 18 mai 2007 08:08:15 GMT

a modem operating at data signalling rates of up to 28 800 bit/s for use on the general switched telephone network and on leased point-to-point 2-wire telephone-type circuits