)454 - $)')4!,,//0"!#+ -%#(!.)3-3 -!).4%.!.#% ).42/$5#4)/.!.$ '%.%2!, 02).#)0,%3. )454 Recommendation - INTERNATIONAL TELECOMMUNICATION UNION
|
|
|
- Hilda Owens
- 6 years ago
- Views:
Transcription
1 INTERNATIONAL TELECOMMUNICATION UNION )454 - TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU -!).4%.!.#% ).42/$5#4)/.!.$ '%.%2!, 02).#)0,%3 $)')4!,,//0"!#+ -%#(!.)3-3 )454 Recommendation - (Extract from the "LUE "OOK)
2 NOTES 1 ITU-T Recommendation M.125 was published in Fascicle IV.1 of the Blue Book. This file is an extract from the Blue Book. While the presentation and layout of the text might be slightly different from the Blue Book version, the contents of the file are identical to the Blue Book version and copyright conditions remain unchanged (see below). 2 In this Recommendation, the expression Administration is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. ITU 1988, 1993 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU.
3 Recommendation M.125 Fascicle IV.1 - Rec. M.125 DIGITAL LOOPBACK MECHANISMS 1 General Loopback can be one of the mechanisms which may be applied to fault localization and failure detection. This Recommendation provides digital loopback definitions and describes loopback applications related to the maintenance phases of Recommendation M Digital loopback definitions A digital loopback is a mechanism incorporated into a piece of equipment whereby a bidirectional communication path may be connected back upon itself so that some or all of the information contained in the bit stream sent on the transmit path is returned on the receive path. The loopback point is the location of the loopback. The loopback control mechanism is the means by which the loopback is operated and released from the loopback control point. The loopback control point is the point which has the ability to directly control loopbacks. The loopback control point may receive requests for loopback operation from several loopback requesting points. The loopback requesting point is the point which requests the loopback control point to operate loopbacks. Note 1 Loopback requests should be subject to identification and authorization. Note 2 Possible locations of loopback requesting points are: the network, or a telecommunications management network (TMN), or a maintenance service provider (MSP). The loopback test pattern is the test information transmitted during the operation of the loopback in the channel or channels which are to be redirected by the loopback. point. Note 1 The generation of the test pattern used over the loopback may or may not take place at the control The loopback application is the maintenance phase for which the loopback operation is used, as defined in Recommendation M Loopback types The following three types of loopback mechanisms are defined: a) complete loopback A complete loopback is a physical layer [1] mechanism which operates on the full bit stream. At the loopback point, the received bit stream shall be transmitted back towards the transmitting station without modification. Note The use of the term complete loopback is not related to implementation since such a loopback may be provided by means of active logic elements or controlled unbalance of hybrid transformer, etc. At the control point only the information channels may be available. b) partial loopback A partial loopback is a physical layer [1] mechanism which operates on one or more specified channels multiplexed within the full bit stream. At the loopback point, the received bit stream associated with the specified channel(s) shall be transmitted back towards the transmitting station without modification. c) logical loopback A logical loopback acts selectively on certain information within a specified channel or channels and may result in some specified modification of the looped information. Logical loopbacks may be defined to apply at any layer [1], depending on the detailed maintenance procedures specified. Fascicle IV.1 - Rec. M.125 1
4 For each of the above three types of loopback mechanisms, the loopback may be further categorized as either transparent or non-transparent: i) A transparent loopback is one in which the signal transmitted beyond the loopback point (the forward signal) when the loopback is activated, is the same as the received signal at the loopback point. See Figure 1 a)/m.125. ii) A non-transparent loopback is one in which the signal transmitted beyond the loopback point (the forward signal) when the loopback is activated is not the same as the received signal at the loopback point. The forward signal may be defined signal or unspecified. See Figure 1 b)/m.125. Note Whether or not a transparent loopback is used, the loopback should not be affected by facilities connected beyond the point at which the loop is provided, e.g., by the presence of short circuits, open circuits or foreign voltages. Annex A to this Recommendation shows some examples of loopbacks. d01-sc FIGURE 1/M [D01] 2 Fascicle IV.1 - Rec. M.125
5 3 Loopback applications 3.1 Failure detection In order to detect failures related to networks maintained by different maintenance organizations, loopbacks should be applied at the borderline separating the maintenance responsibilities. Loopbacks should be located in the maintenance entities (ME) adjacent to the borderline and as close as possible to the borderline. Part of the bit stream can be involved in failure detection. Figure 2/M.125 shows an example with failure detection originated in locations A and B. d02-sc FIGURE 2/M [D02] 3.2 Fault localization The localization of faults in networks consisting of n maintenance entities requires at least n + 1 loopback mechanisms. The loopback point should be as close as possible to the in- and output ports of the ME in order to include as much as possible of the ME in the loopback mechanism. (See example in Figure 3/M.125.) Part of the bit stream or the complete bit stream can be involved in fault localization, originated in locations A or B. d03-sc FIGURE 3/M [D03] 3.3 Verification Verification can require performance tests and measurements of the complete bit stream. The same loopback location can be used as for fault localization. 4 Loopback operation and release Loopbacks can be operated/released locally or remotely. Remote operation/release can be based on in-service addressing (e.g., layer 1 protocols) or it can require separate loopbacks addressing systems. 5 Loopback examples (under study see Annex A) Fascicle IV.1 - Rec. M.125 3
6 ANNEX A (to Recommendation M.125) d04-sc FIGURE 4/M [D04] 4 Fascicle IV.1 - Rec. M.125
7 Reference [1] CCITT Recommendation Reference model of open system interconnection for CCITT applications, Vol. VIII, Recommendation X.200. Fascicle IV.1 - Rec. M.125 5
)454 - ).4%2.!4)/.!, 4)-% $)6)3)/. -5,4)0,%8 4$- 4%,%'2!0( 3934%-3 -!).4%.!.#% ).4%2.!4)/.!, 4%,%'2!0( 3934%-3!.$ 0(/4/4%,%'2!0( 42!.3-)33)/.
INTERNATIONAL TELECOMMUNICATION UNION )454 - TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU -!).4%.!.#% ).4%2.!4)/.!, 4%,%'2!0( 3934%-3!.$ 0(/4/4%,%'2!0( 42!.3-)33)/. ).4%2.!4)/.!, 4)-% $)6)3)/. -5,4)0,%8
)454 ) TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU
INTERNATIONAL TELECOMMUNICATION UNION )454 ) TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU ).4%'2!4%$ 3%26)#%3 $)')4!,.%47/2+ )3$. )3$. 53%2.%47/2+ ).4%2&!#%3 )3$. 53%2.%47/2+ ).4%2&!#%3 ).4%2&!#% 3425#452%3!.$!##%33
)454 ) )3$.4/)3$.,!9%2 ).4%2.%47/2+ ).4%2&!#% ).4%'2!4%$ 3%26)#%3 $)')4!,.%47/2+ )3$. ).4%2.%47/2+ ).4%2&!#%3. )454 Recommendation )
INTERNATIONAL TELECOMMUNICATION UNION )454 ) TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU ).4%'2!4%$ 3%26)#%3 $)')4!,.%47/2+ )3$. ).4%2.%47/2+ ).4%2&!#%3 )3$.4/)3$.,!9%2 ).4%2.%47/2+ ).4%2&!#% )454
INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION )454 ) TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU ).4%'2!4%$ 3%26)#%3 $)')4!,.%47/2+ )3$. '%.%2!, 3425#452% -%4(/$ &/2 4(% #(!2!#4%2):!4)/. /& 4%,%#/--5.)#!4)/.
)454 ' TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU
INTERNATIONAL TELECOMMUNICATION UNION )454 ' TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU $)')4!,.%47/2+3 #/.42/,,%$ 3,)0 2!4% /"*%#4)6%3 /.!. ).4%2.!4)/.!, $)')4!, #/..%#4)/. )454 Recommendation '
)454 ) )3$..5-"%2).'!.$!$$2%33).' 02).#)0,%3 ).4%2'2!4%$ 3%26)#%3 $)')4!,.%47/2+ )3$. /6%2!,,.%47/2+!30%#43!.$ &5.#4)/.3. )454 Recommendation )
INTERNATIONAL TELECOMMUNICATION UNION )454 ) TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU ).4%2'2!4%$ 3%26)#%3 $)')4!,.%47/2+ )3$. /6%2!,,.%47/2+!30%#43!.$ &5.#4)/.3 )3$..5-"%2).'!.$!$$2%33).' 02).#)0,%3
)454 : ).42/$5#4)/. 4/ 4(% ##)44 -!.-!#().%,!.'5!'% )454 Recommendation : INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION )454 : TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU -!.-!#().%,!.'5!'% ).42/$5#4)/. 4/ 4(% ##)44 -!.-!#().%,!.'5!'% )454 Recommendation : (Extract from the "LUE
INTERNATIONAL TELECOMMUNICATION UNION '%.%2!,!30%#43 /& $)')4!, 42!.3-)33)/. 3934%-3
INTERNATIONAL TELECOMMUNICATION UNION )454 ' TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU '%.%2!,!30%#43 /& $)')4!, 42!.3-)33)/. 3934%-3 4%2-).!, %15)0-%.43 $)')4!, -5,4)0,%8 %15)0-%.43 /0%2!4).'!4
)454 : 4(% #(!2!#4%2 3%4!.$ "!3)# %,%-%.43 -!.-!#().%,!.'5!'% )454 Recommendation : INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION )454 : TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU -!.-!#().%,!.'5!'% 4(% #(!2!#4%2 3%4!.$ "!3)# %,%-%.43 )454 Recommendation : (Extract from the "LUE "OOK) NOTES
INTERNATIONAL TELECOMMUNICATION UNION. SERIES I: INTEGRATED SERVICES DIGITAL NETWORK (ISDN) Overall network aspects and functions, ISDN usernetwork
INTERNATIONAL TELECOMMUNICATION UNION CCITT I.324 THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE (11/1988) SERIES I: INTEGRATED SERVICES DIGITAL NETWORK (ISDN) Overall network aspects
INTERNATIONAL TELECOMMUNICATION UNION. SERIES I: INTEGRATED SERVICES DIGITAL NETWORK (ISDN) Service capabilities Supplementary services in ISDN
INTERNATIONAL TELECOMMUNICATION UNION CCITT THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE I.251.4 (11/1988) SERIES I: INTEGRATED SERVICES DIGITAL NETWORK (ISDN) Service capabilities
)454 1 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU
INTERNATIONAL TELECOMMUNICATION UNION )454 1 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU 05",)#,!.$ -/"),%.%47/2+3,/#!4)/. 2%')34%2 2%34/2!4)/. 02/#%$52%3 )454 Recommendation 1 (Extract from the "LUE
)454 % $%&).)4)/.3 /& 4%2-3 53%$ ). ).4%2.!4)/.!, 4%,%0(/.% /0%2!4)/. 4%,%0(/.%.%47/2+!.$ )3$. /0%2!4)/..5-"%2).' 2/54).'!.
INTERNATIONAL TELECOMMUNICATION UNION )454 % TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU 4%,%0(/.%.%47/2+!.$ )3$. /0%2!4)/..5-"%2).' 2/54).'!.$ -/"),% 3%26)#% $%&).)4)/.3 /& 4%2-3 53%$ ). ).4%2.!4)/.!,
)454 6 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU
INTERNATIONAL TELECOMMUNICATION UNION )454 6 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU $!4! #/--5.)#!4)/. /6%2 4(% 4%,%0(/.%.%47/2+ #/$%).$%0%.$%.4 %22/2#/.42/, 3934%- )454 Recommendation 6 (Extract
ITU-T X.282. Superseded by a more recent version. Amendment 2 (12/97)
INTERNATIONAL TELECOMMUNICATION UNION ITU-T X.282 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 2 (12/97) SERIES X: DATA NETWORKS AND OPEN SYSTEM COMMUNICATION Open System Interconnection Layer
INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION CCITT E.170 THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE (11/1988) SERIES E: OVERALL NETWORK OPERATION, TELEPHONE SERVICE, SERVICE OPERATION AND
OBSERVATIONS ON INTERNATIONAL OUTGOING TELEPHONE CALLS FOR QUALITY OF SERVICE
INTERNATIONAL TELECOMMUNICATION UNION CCITT E.422 THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE (11/1988) SERIES E: OVERALL NETWORK OPERATION, TELEPHONE SERVICE, SERVICE OPERATION AND
INTERNATIONAL TELECOMMUNICATION UNION. SERIES U: TELEGRAPH SWITCHING The international telex service
INTERNATIONAL TELECOMMUNICATION UNION )454 5 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (10/96) SERIES U: TELEGRAPH SWITCHING The international telex service 4HE INTERNATIONAL TELEX SERVICE )NTERWORKING
INTERNATIONAL TELECOMMUNICATION UNION. SERIES I: INTEGRATED SERVICES DIGITAL NETWORK (ISDN) Internetwork interfaces
INTERNATIONAL TELECOMMUNICATION UNION CCITT I.510 THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE (11/1988) SERIES I: INTEGRATED SERVICES DIGITAL NETWORK (ISDN) Internetwork interfaces
INTERNATIONAL TELECOMMUNICATION UNION -!).4%.!.#% 4%,%#/--5.)#!4)/. -!.!'%-%.4.%47/2+
INTERNATIONAL TELECOMMUNICATION UNION )454 - TELECOMMUNICATION (05/96) STANDARDIZATION SECTOR OF ITU -!).4%.!.#% 4%,%#/--5.)#!4)/. -!.!'%-%.4.%47/2+ 4-. -!.!'%-%.4 3%26)#% &!5,4!.$ 0%2&/2-!.#% -!.!'%-%.4
INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION ITU-T H.323 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Annex G (02/00) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Infrastructure of audiovisual services Systems
INTERNATIONAL TELECOMMUNICATION UNION. SERIES Q: SWITCHING AND SIGNALLING Interworking of Signalling Systems
INTERNATIONAL TELECOMMUNICATION UNION CCITT Q.764 THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE (11/1988) SERIES Q: SWITCHING AND SIGNALLING Interworking of Signalling Systems INTEGRATED
INTERNATIONAL TELECOMMUNICATION UNION. Signalling system No. 7 ISDN user part enhancements for the support of number portability
INTERNATIONAL TELECOMMUNICATION UNION TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.769.1 (12/99) SERIES Q: SWITCHING AND SIGNALLING Specifications of Signalling System No. 7 ISDN user part Signalling
IMPACT OF NON-VOICE APPLICATIONS ON THE TELEPHONE NETWORK
INTERNATIONAL TELECOMMUNICATION UNION CCITT E.301 THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE (11/1988) SERIES E: OVERALL NETWORK OPERATION, TELEPHONE SERVICE, SERVICE OPERATION AND
)454 ) )3$. 53%2.%47/2+ ).4%2&!#%3 2%&%2%.#% #/.&)'52!4)/.3 ).4%'2!4%$ 3%26)#%3 $)')4!,.%47/2+ )3$. )3$. 53%2.%47/2+ ).4%2&!#%3. )454 Recommendation )
INTERNATIONAL TELECOMMUNICATION UNION )454 ) TELECOMMUNICATION (03/93) STANDARDIZATION SECTOR OF ITU ).4%'2!4%$ 3%26)#%3 $)')4!,.%47/2+ )3$. )3$. 53%2.%47/2+ ).4%2&!#%3 )3$. 53%2.%47/2+ ).4%2&!#%3 2%&%2%.#%
)454 I.120 ).4%'2!4%$ 3%26)#%3 $)')4!,.%47/2+3 )3$.S ).4%'2!4%$ 3%26)#%3 $)')4!,.%47/2+ )3$. '%.%2!, 3425#452% )454 Recommendation )
INTERNATIONAL TELECOMMUNICATION UNION )454 I.120 TELECOMMUNICATION (03/93) STANDARDIZATION SECTOR OF ITU ).4%'2!4%$ 3%26)#%3 $)')4!,.%47/2+ )3$. '%.%2!, 3425#452% ).4%'2!4%$ 3%26)#%3 $)')4!,.%47/2+3 )3$.S
PRINCIPLES FOR A TELECOMMUNICATIONS MANAGEMENT NETWORK
INTERNATIONAL TELECOMMUNICATION UNION CCITT M.30 THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE (11/1988) SERIES M: GENERAL MAINTENANCE PRINCIPLES Maintenance of international transmission
INTERNATIONAL TELECOMMUNICATION UNION TELEPHONE NETWORK AND ISDN QUALITY OF SERVICE, NETWORK MANAGEMENT AND TRAFFIC ENGINEERING
INTERNATIONAL TELECOMMUNICATION UNION CCITT E.490 THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE TELEPHONE NETWORK AND ISDN QUALITY OF SERVICE, NETWORK MANAGEMENT AND TRAFFIC ENGINEERING
INTERNATIONAL TELECOMMUNICATION UNION. SERIES Q: SWITCHING AND SIGNALLING Interworking of Signalling Systems Specifications of Signalling System No.
INTERNATIONAL TELECOMMUNICATION UNION CCITT Q.763 THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE (11/1988) SERIES Q: SWITCHING AND SIGNALLING Interworking of Signalling Systems Specifications
INTERNATIONAL TELECOMMUNICATION UNION INTEGRATED SERVICES DIGITAL NETWORK (ISDN) INTERNETWORK INTERFACES AND MAINTENANCE PRINCIPLES
INTERNATIONAL TELECOMMUNICATION UNION CCITT I.610 THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE INTEGRATED SERVICES DIGITAL NETWORK (ISDN) INTERNETWORK INTERFACES AND MAINTENANCE PRINCIPLES
INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION CCITT G.709 THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE (11/1988) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS General
INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION ITU-T X.1 TELECOMMUNICATION (03/93) STANDARDIZATION SECTOR OF ITU PUBLIC DATA NETWORK: SERVICES AND FACILITIES INTERNATIONAL USER CLASSES OF SERVICE IN, AND CATEGORIES
INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION )454 1 TELECOMMUNICATION (02/95) STANDARDIZATION SECTOR OF ITU ")3$.!00,)#!4)/. 02/4/#/,3 &/2!##%33 3)'.!,,).' "2/!$"!.$ ).4%'2!4%$ 3%26)#%3 $)')4!,.%47/2+ ")3$. $)')4!,
INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION CCITT E.412 THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE (11/1988) SERIES E: OVERALL NETWORK OPERATION, TELEPHONE SERVICE, SERVICE OPERATION AND
INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.699.1 (05/98) SERIES Q: SWITCHING AND SIGNALLING Interworking of Signalling Systems Interworking between Digital
ITU-T H.323. Amendment 1 (03/2013) Packet-based multimedia communications systems Amendment 1: Use of Facility message to enable call transfer
International Telecommunication Union ITU-T H.323 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 1 (03/2013) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Infrastructure of audiovisual services
ITU-T E.212. The international identification plan for mobile terminals and mobile users
INTERNATIONAL TELECOMMUNICATION UNION ITU-T E.212 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (11/98) SERIES E: OVERALL NETWORK OPERATION, TELEPHONE SERVICE, SERVICE OPERATION AND HUMAN FACTORS Operation,
INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION ITU-T M.2110 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (07/2002) SERIES M: TMN AND NETWORK MAINTENANCE: INTERNATIONAL TRANSMISSION SYSTEMS, TELEPHONE CIRCUITS,
INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION CCITT Q.713 THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE (11/1988) SERIES Q: SWITCHING AND SIGNALLING Specifications of Signalling System No. 7
SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital terminal equipments General
International Telecommunication Union ITU-T G.703 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Corrigendum 1 (03/2008) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital
INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION ITU-T G.831 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (03/2000) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital networks Network
INTERNATIONAL TELECOMMUNICATION UNION TELEPHONE NETWORK AND ISDN QUALITY OF SERVICE, NETWORK MANAGEMENT AND TRAFFIC ENGINEERING
INTERNATIONAL TELECOMMUNICATION UNION CCITT E.505 THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE TELEPHONE NETWORK AND ISDN QUALITY OF SERVICE, NETWORK MANAGEMENT AND TRAFFIC ENGINEERING
INTERNATIONAL TELECOMMUNICATION UNION. SERIES I: INTEGRATED SERVICES DIGITAL NETWORK (ISDN) Internetwork interfaces
ITERATIOAL TELECOMMUICATIO UIO CCITT I.530 THE ITERATIOAL TELEGRAPH AD TELEPHOE COSULTATIVE COMMITTEE (11/1988) SERIES I: ITEGRATED SERVICES DIGITAL ETWORK (ISD) Internetwork interfaces etwork interworking
INTERNATIONAL TELECOMMUNICATION UNION 4%,%-!4)# 3%26)#%3 4%2-).!, %15)0-%.43!.$ 02/4/#/,3 &/2 4%,%-!4)# 3%26)#%3
INTERNATIONAL TELECOMMUNICATION UNION )454 4 TELECOMMUNICATION (03/93) STANDARDIZATION SECTOR OF ITU 4%,%-!4)# 3%26)#%3 4%2-).!, %15)0-%.43!.$ 02/4/#/,3 &/2 4%,%-!4)# 3%26)#%3 ).&/2-!4)/. 4%#(./,/'9 /0%.
##)44 6 BIS $!4! #/-02%33)/. 02/#%$52%3 &/2 $!4! #)2#5)4 4%2-).!4).' %15)0-%.4 $#% 53).' %22/2 #/22%#4)/. 02/#%$52%3
INTERNATIONAL TELECOMMUNICATION UNION ##)44 6 BIS THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE $!4! #/--5.)#!4)/. /6%2 4(% 4%,%0(/.%.%47/2+ $!4! #/-02%33)/. 02/#%$52%3 &/2 $!4! #)2#5)4
INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.1902.6 (07/2001) SERIES Q: SWITCHING AND SIGNALLING Specifications of signalling related to Bearer Independent
INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION )454 X.227 TELECOMMUNICATION (04/95) STANDARDIZATION SECTOR OF ITU $!4!.%47/2+3!.$ /0%. 3934%- #/--5.)#!4)/.3 /0%. 3934%-3 ).4%2#/..%#4)/. #/..%#4)/.-/$% 02/4/#/,
B C ISO/IEC 9595 INTERNATIONAL STANDARD. Information technology Open Systems Interconnection Common management information service
INTERNATIONAL STANDARD ISO/IEC 9595 Third edition 1998-10-15 Information technology Open Systems Interconnection Common management information service Technologies de l'information Interconnexion de systèmes
Superseded by a more recent version INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION ITU-T X.162 TELECOMMUNICATION (04/95) STANDARDIZATION SECTOR OF ITU DATA NETWORKS AND OPEN SYSTEM COMMUNICATIONS PUBLIC DATA NETWORKS MAINTENANCE DEFINITION OF MANAGEMENT
INTERNATIONAL TELECOMMUNICATION UNION INTEGRATED SERVICES DIGITAL NETWORK (ISDN) GENERAL STRUCTURE AND SERVICE CAPABILITIES
INTERNATIONAL TELECOMMUNICATION UNION CCITT THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE I.251.3 (rev.1) INTEGRATED SERVICES DIGITAL NETWORK (ISDN) GENERAL STRUCTURE AND SERVICE CAPABILITIES
T.140 (02/98) Protocol for multimedia application text conversation SERIES T: TERMINALS FOR TELEMATIC SERVICES. ITU-T Recommendation T.
INTERNATIONAL TELECOMMUNICATION UNION TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU T.140 (02/98) SERIES T: TERMINALS FOR TELEMATIC SERVICES Protocol for multimedia application text conversation ITU-T
INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION ITU-T H.323 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Annex Q (07/2001) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Infrastructure of audiovisual services Systems
ITU-T I.150. B-ISDN asynchronous transfer mode functional characteristics
INTERNATIONAL TELECOMMUNICATION UNION ITU-T I.150 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (02/99) SERIES I: INTEGRATED SERVICES DIGITAL NETWORK General structure General description of asynchronous
INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION ITU-T X.680 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Corrigendum 1 (06/99) SERIES X: DATA NETWORKS AND OPEN SYSTEM COMMUNICATIONS OSI networking and system
)454 ) 3%26)#% ).4%27/2+).' ).4%'2!4%$ 3%26)#%3 $)')4!,.%47/2+ )3$. ).4%2.%47/2+ ).4%2&!#%3. )454 Recommendation )
INTERNATIONAL TELECOMMUNICATION UNION )454 ) TELECOMMUNICATION (03/93) STANDARDIZATION SECTOR OF ITU ).4%'2!4%$ 3%26)#%3 $)')4!,.%47/2+ )3$. ).4%2.%47/2+ ).4%2&!#%3 3%26)#% ).4%27/2+).' )454 Recommendation
) /24 /& 0!#+%4 -/$% 4%2-).!, %15)0-%.4 "9!. )3$. $!4!.%47/2+3!.$ /0%. 3934%- #/--5.)#!4)/.3 05",)# $!4!.%47/2+3 ).4%2&!
INTERNATIONAL TELECOMMUNICATION UNION )454 8 TELECOMMUNICATION (11/95) STANDARDIZATION SECTOR OF ITU $!4!.%47/2+3!.$ /0%. 3934%- #/--5.)#!4)/.3 05",)# $!4!.%47/2+3 ).4%2&!#%3 3500/24 /& 0!#+%4 -/$% 4%2-).!,
##)44 ) REV #!,,).',).% )$%.4)&)#!4)/. 2%342)#4)/. ).4%'2!4%$ 3%26)#%3 $)')4!,.%47/2+ )3$. '%.%2!, 3425#452%!.$ 3%26)#% #!0!
INTERNATIONAL TELECOMMUNICATION UNION ##)44 ) REV THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE ).4%'2!4%$ 3%26)#%3 $)')4!,.%47/2+ )3$. '%.%2!, 3425#452%!.$ 3%26)#% #!0!"),)4)%3 #!,,).',).%
ITU-T G.979. Characteristics of monitoring systems for optical submarine cable systems
I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T G.979 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (11/2016) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND
INTERNATIONAL TELECOMMUNICATION UNION. SPECIFICATIONS OF SIGNALLING SYSTEM No. 7
INTERNATIONAL TELECOMMUNICATION UNION Q.74 TELECOMMUNICATION (0/9) STANDARDIZATION SECTOR OF ITU SPECIFICATIONS OF SIGNALLING SYSTEM. 7 SIGNALLING SYSTEM. 7 SIGNALLING CONNECTION CONTROL PART PROCEDURES
INTERNATIONAL TELECOMMUNICATION UNION. SERIES F: NON-TELEPHONE TELECOMMUNICATION SERVICES Message handling services
INTERNATIONAL TELECOMMUNICATION UNION CCITT THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE F.400/X.400 (11/1988) SERIES F: NON-TELEPHONE TELECOMMUNICATION SERVICES Message handling services
INTERNATIONAL TELECOMMUNICATION UNION. SERIES I: INTEGRATED SERVICES DIGITAL NETWORK B-ISDN equipment aspects Multiplexing aspects
INTERNATIONAL TELECOMMUNICATION UNION ITU-T I.761 TELECOMMUNICATION STANDARDIZATION SECTOR O ITU (03/2000) SERIES I: INTEGRATED SERVICES DIGITAL NETWORK B-ISDN equipment aspects Multiplexing aspects Inverse
)454 ' 39.#(2/./53 $)')4!, ()%2!2#(9 3$( 0%2&/2-!.#% -/.)4/2).' &/2 4(%.%47/2+ %,%-%.4 6)%7 '%.%2!,!30%#43 /& $)')4!, 42!.3-)33)/.
INTERNATIONAL TELECOMMUNICATION UNION )454 ' TELECOMMUNICATION (11/94) STANDARDIZATION SECTOR OF ITU '%.%2!,!30%#43 /& $)')4!, 42!.3-)33)/. 3934%-3 39.#(2/./53 $)')4!, ()%2!2#(9 3$( 0%2&/2-!.#% -/.)4/2).'
INTERNATIONAL TELECOMMUNICATION UNION SPECIFICATIONS OF MEASURING EQUIPMENT
INTERNATIONAL TELECOMMUNICATION UNION CCITT O.152 THE INTERNATIONAL (10/92) TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE SPECIFICATIONS OF MEASURING EQUIPMENT ERROR PERFORMANCE MEASURING EQUIPMENT FOR
INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION ITU-T E.161 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (02/2001) SERIESE:OVERALLNETWORKOPERATION, TELEPHONE SERVICE, SERVICE OPERATION AND HUMAN FACTORS International
ITU-T Q.1970 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU
INTERNATIONAL TELECOMMUNICATION UNION ITU-T Q.1970 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (07/2001) SERIES Q: SWITCHING AND SIGNALLING Specifications of signalling related to Bearer Independent
INTERNATIONAL TELECOMMUNICATION UNION INTEGRATED SERVICES DIGITAL NETWORK (ISDN) OVERALL NETWORK ASPECTS AND FUNCTIONS, ISDN USER-NETWORK INTERFACES
INTERNATIONAL TELECOMMUNICATION UNION CCITT I.327 THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSUATIVE COMMITTEE INTEGRATED SERVIS DIGITAL NETWORK (ISDN) OVERALL NETWORK ASPECTS AND FUNCTIONS, ISDN USER-NETWORK
)454 ' 3YNCHRONOUS $IGITAL (IERARCHY 3$( UNIDIRECTIONAL PERFORMANCE MONITORING FOR THE NETWORK ELEMENT VIEW
INTERNATIONAL TELECOMMUNICATION UNION )454 ' TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (04/97) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital transmission systems
ISO/IEC INTERNATIONAL STANDARD. Information technology Open distributed processing Reference model: Architecture
INTERNATIONAL STANDARD ISO/IEC 10746-3 Second edition 2009-12-15 Information technology Open distributed processing Reference model: Architecture Technologies de l'information Traitement réparti ouvert
SERIES M: TELECOMMUNICATION MANAGEMENT, INCLUDING TMN AND NETWORK MAINTENANCE Telecommunications management network
International Telecommunication Union ITU-T M.3010 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 2 (11/2005) SERIES M: TELECOMMUNICATION MANAGEMENT, INCLUDING TMN AND NETWORK MAINTENANCE Telecommunications
ITU-T J.288. Encapsulation of type length value (TLV) packet for cable transmission systems
I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T J.288 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (03/2016) SERIES J: CABLE NETWORKS AND TRANSMISSION OF TELEVISION, SOUND
SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Access networks In premises networks
International Telecommunication Union ITU-T G.9972 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Corrigendum 1 (04/2014) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Access
ISO/IEC INTERNATIONAL STANDARD. Information technology Security techniques Governance of information security
INTERNATIONAL STANDARD ISO/IEC 27014 First edition 2013-05-15 Information technology Security techniques Governance of information security Technologies de l'information Techniques de sécurité Gouvernance
ISO/IEC INTERNATIONAL STANDARD
This is a preview - click here to buy the full publication INTERNATIONAL STANDARD ISO/IEC 15953 First edition 1999-12-15 Information technology Open Systems Interconnection Service definition for the Application
ISO/IEC INTERNATIONAL STANDARD. Information technology Abstract Syntax Notation One (ASN.1): Parameterization of ASN.
INTERNATIONAL STANDARD ISO/IEC 8824-4 Fifth edition 2015-11-15 Information technology Abstract Syntax Notation One (ASN.1): Parameterization of ASN.1 specifications Technologies de l'information Notation
ISO/IEC 8348 INTERNATIONAL STANDARD. Information technology Open Systems Interconnection Network service definition
INTERNATIONAL STANDARD ISO/IEC 8348 Third edition 2002-11-01 Information technology Open Systems Interconnection Network service definition Technologies de l'information Interconnexion des systèmes ouverts
ISO IEC. INTERNATIONAL ISO/IEC STANDARD Information technology Fibre Distributed Data Interface (FDDI) Part 5: Hybrid Ring Control (HRC)
INTERNATIONAL ISO/IEC STANDARD 9314-5 First edition 1995-02-01 Information technology Fibre Distributed Data Interface (FDDI) Part 5: Hybrid Ring Control (HRC) Technologies de l'information Interface de
ISO/IEC INTERNATIONAL STANDARD. Information technology Abstract Syntax Notation One (ASN.1): Information object specification
INTERNATIONAL STANDARD ISO/IEC 8824-2 Fifth edition 2015-11-15 Information technology Abstract Syntax Notation One (ASN.1): Information object specification Technologies de l'information Notation de syntaxe
ITU-T I.570. Public/private ISDN interworking. SERIES I: INTEGRATED SERVICES DIGITAL NETWORK Internetwork interfaces. Recommendation ITU-T I.
I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T I.570 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (01/2018) SERIES I: INTEGRATED SERVICES DIGITAL NETWORK Internetwork interfaces
Information technology Security techniques Telebiometric authentication framework using biometric hardware security module
INTERNATIONAL STANDARD ISO/IEC 17922 First edition 2017-09 Information technology Security techniques Telebiometric authentication framework using biometric hardware security module Technologies de l information
ITU-T. P.10/G.100 Amendment 3 (12/2011)
International Telecommunication Union ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU P.10/G.100 Amendment 3 (12/2011) SERIES P: TERMINALS AND SUBJECTIVE AND OBJECTIVE ASSESSMENT METHODS Vocabulary
ISOJIEC INTERNATIONAL STANDARD
INTERNATIONAL STANDARD ISOJIEC 861-5 Second edition 1994-12-15 Information technology - Open Document Architecture (ODA) and Interchange Format: Open Document Interchange Format Technologies de Yin forma
ITU-T. G.870/Y.1352 Amendment 1 (11/2009) Terms and definitions for optical transport networks (OTN) Amendment 1
International Telecommunication Union ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU G.870/Y.1352 (11/2009) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital networks
INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION ITU-T Q.711 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (03/2001) SERIES Q: SWITCHING AND SIGNALLING Specifications of Signalling System No. 7 Signalling connection
INTERNATIONAL TELECOMMUNICATION UNION. SERIES Q: DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 (DSS 1), DATA LINK LAYER
INTERNATIONAL TELECOMMUNICATION UNION CCITT Q.921 THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE (11/1988) SERIES Q: DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 (DSS 1), DATA LINK LAYER
This is a preview - click here to buy the full publication INTERNATIONAL STANDARD
INTERNATIONAL STANDARD ISO/IEC 181-3 First edition 1996-09-I 5 Information technology - Open Systems Interconnection - Security frameworks for open systems: Access control framework Technologies de I informa
SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Infrastructure of audiovisual services Communication procedures
International Telecommunication Union ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU H.248.14 (03/2009) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Infrastructure of audiovisual services Communication
INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION ITU-T E.212 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (05/2004) SERIES E: OVERALL NETWORK OPERATION, TELEPHONE SERVICE, SERVICE OPERATION AND HUMAN FACTORS International
INTERNATIONAL TELECOMMUNICATION UNION. SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN Signalling network protocols
INTERNATIONAL TELECOMMUNICATION UNION )454 1 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (07/96) SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN Signalling network protocols -ESSAGE TRANSFER PART
DATA COMMUNICATION NETWORKS INFORMATION TECHNOLOGY OPEN SYSTEMS INTERCONNECTION SYSTEMS MANAGEMENT OVERVIEW
INTERNATIONAL TELECOMMUNICATION UNION CCITT X.701 THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE DATA COMMUNICATION NETWORKS INFORMATION TECHNOLOGY OPEN SYSTEMS INTERCONNECTION SYSTEMS
INTERNATIONAL STANDARD
INTERNATIONAL STANDARD ISO/IEC 9314-7 First edition 1998-08 Information technology Fibre distributed data interface (FDDI) Part 7: Physical Layer Protocol (PHY-2) Reference number ISO/IEC 9314-7:1998(E)
ISO/IEC 8822 INTERNATIONAL STANDARD. Information technology - Open Systems Interconnection - Presentation service definition
INTERNATIONAL STANDARD ISO/IEC 8822 Second edition 1994-12-15 Information technology - Open Systems Interconnection - Presentation service definition Technologies de / information - lnterconnexion de systemes
ISO/IEC INTERNATIONAL STANDARD
INTERNATIONAL STANDARD ISO/IEC 9594-8 Sixth edition 2008-12-15 Information technology Open Systems Interconnection The Directory: Publickey and attribute certificate frameworks Technologies de l'information
SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital networks Quality and availability targets
International Telecommunication Union ITU-T G.825 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 1 (05/2008) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital networks
INTERNATIONAL TELECOMMUNICATION UNION. SERIES Q: SWITCHING AND SIGNALLING Specifications of Signalling System No. 7 Signalling connection control part
INTERNATIONAL TELECOMMUNICATION UNION ITU-T Q.711 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (07/96) SERIES Q: SWITCHING AND SIGNALLING Specifications of Signalling System No. 7 Signalling connection
ITU-T Y IP access network architecture
INTERNATIONAL TELECOMMUNICATION UNION ITU-T Y.1231 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (11/2000) SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE AND INTERNET PROTOCOL ASPECTS Internet protocol
INTERNATIONAL TELECOMMUNICATION UNION TERMINAL EQUIPMENTS AND PROTOCOLS FOR TELEMATIC SERVICES
INTERNATIONAL TELECOMMUNICATION UNION ITU-T T.4 TELECOMMUNICATION (03/93) STANDARDIZATION SECTOR OF ITU TERMINAL EQUIPMENTS AND PROTOCOLS FOR TELEMATIC SERVICES STANDARDIZATION OF GROUP 3 FACSIMILE APPARATUS
ITU-T Y Next generation network evolution phase 1 Overview
I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T Y.2340 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (09/2016) SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL
ISO/IEC INTERNATIONAL STANDARD. Information technology Open Distributed Processing Interface references and binding
INTERNATIONAL STANDARD ISO/IEC 14753 First edition 1999-07-15 Information technology Open Distributed Processing Interface references and binding Technologies de l'information Traitement distribué ouvert
ISO/IEC INTERNATIONAL STANDARD
INTERNATIONAL STANDARD ISO/IEC 86-1 Second edition 94-l 2-15 Information technology - Open Document Architecture (ODA) and Interchange Format: Introduction and general principles Technologies de I informa
INTERNATIONAL TELECOMMUNICATION UNION
INTERNATIONAL TELECOMMUNICATION UNION ITU-T E.437 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (05/99) SERIES E: OVERALL NETWORK OPERATION, TELEPHONE SERVICE, SERVICE OPERATION AND HUMAN FACTORS Quality