ETSI EN 300 417-9-1 V1.1.1 (2001-09)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.XQNFLRQDOQRVWTransmission and Multiplexing (TM); Generic requirements of transport functionality of equipment; Part 9: Synchronous Digital Hierarchy (SDH) concatenated path layer functions; Sub-part 1: Requirements33.040.20Prenosni sistemTransmission systemsICS:Ta slovenski standard je istoveten z:EN 300 417-9-1 Version 1.1.1SIST EN 300 417-9-1 V1.1.1:2003en01-december-2003SIST EN 300 417-9-1 V1.1.1:2003SLOVENSKI
STANDARD
ETSI ETSI EN 300 417-9-1 V1.1.1 (2001-09)2
Reference DEN/TM-01015-9-1 Keywords SDH, transmission ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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ETSI ETSI EN 300 417-9-1 V1.1.1 (2001-09)3 Contents Intellectual Property Rights.7 Foreword.7 1 Scope.8 2 References.8 3 Definitions, symbols and abbreviations.8 3.1 Definitions.8 3.2 Symbols.9 3.3 Abbreviations.9 4 Generic Processes.9 4.1 Layer network interworking function.9 4.2 Virtual concatenation multiframe alignment.9 5 Concatenated VC-4 path layer functions.10 5.1 Atomic functions overview.10 5.2 Layer information.11 5.2.1 VC-4-X layer access point.11 5.2.2 VC-4-X layer connection point.12 5.2.3 VC-4-Xc layer connection point.12 5.2.4 VC-4-Xv layer connection point.13 5.2.5 VC-4-XP layer access point.14 5.2.6 VC-4-XP layer connection point.15 5.3 VC-4-Xc Layer Connection Function S4-Xc_C.15 5.3.1 SNC protection.15 5.4 VC-4-Xc Layer Trail Termination Functions S4-Xc_TT.15 5.4.1 VC-4-Xc Layer Trail Termination Source Function S4-Xc_TT_So.15 5.4.2 VC-4-Xc Layer Trail Termination Sink Function S4-Xc_TT_So.16 5.5 VC-4-Xc Layer Monitoring Functions.16 5.5.1 VC-4-Xc Non-intrusive Monitoring Function S4-Xcm_TT_Sk.16 5.5.2 VC-4-Xc Supervisory Unequipped Termination Source Function S4-Xcs_TT_So.16 5.5.3 VC-4-Xc Supervisory Unequipped Termination Sink Function S4-Xcs_TT_Sk.16 5.6 VC-4-Xc Tandem Connection Sublayer Functions.16 5.6.1 VC-4-Xc Tandem Connection Trail Termination Source Function S4-XcD_TT_So.16 5.6.2 VC-4-Xc Tandem Connection Trail Termination Sink Function S4-XcD_TT_Sk.17 5.6.3 VC-4-Xc Tandem Connection Non-intrusive Monitoring Trail Termination Sink Function S4-XcDm_TT_Sk.17 5.6.4 VC-4-Xc Tandem Connection to VC-4-Xc Adaptation Source Function S4-XcD/S4-Xc_A_So.17 5.6.5 VC-4-Xc Tandem Connection to VC-4-Xc Adaptation Sink Function S4-XcD/S4-Xc_A_Sk.17 5.7 VC-4-Xv Layer Trail Termination Functions S4-Xc_TT.17 5.7.1 VC-4-Xv/VC-4-X Adaptation Source Function S4-Xv/S4-X_A_So.17 5.7.2 VC-4-Xv/VC-4-X Adaptation Sink Function S4-Xv/S4-X_A_Sk.17 5.7.3 VC-4-Xv Layer Trail Termination Source Function S4-Xv_TT_So.18 5.7.4 VC-4-Xv Layer Trail Termination Sink Function S4-Xv_TT_Sk.18 5.8 Interworking Functions.18 5.8.1 VC-4-Xc to VC-4-Xv Interworking Function S4-Xc>S4-Xv_I.18 5.8.2 VC-4-Xv to VC-4-Xc Interworking Function S4-Xv>S4-Xc_I.18 5.9 VC-4-X Layer Adaptation Functions.18 5.9.1 VC-4-X to P0s Adaptation Source Function S4-X/P0s_A_So.18 5.9.2 VC-4-X to P0s Adaptation Sink Function S4-X/P0s_A_Sk.18 5.9.3 VC-4-X to HDLC Adaptation Source Function S4-X/HDLC_A_So.18 5.9.4 VC-4-X to HDLC Adaptation Sink Function S4-X/HDLC_A_Sk.18 5.9.5 VC-4-X to Avp Adaptation Source Function S4-X/Avp_A_So.18 5.9.6 VC-4-X to Avp Adaptation Sink Function S4-X/Avp_A_Sk.18 5.9.7 VC-4-X to TSS1 Adaptation Source Function S4-X/TSS1_A_So.19 5.9.8 VC-4-X to TSS1 Adaptation Sink Function S4-X/TSS1_A_Sk.19 SIST EN 300 417-9-1 V1.1.1:2003

ETSI ETSI EN 300 417-9-1 V1.1.1 (2001-09)4 5.10 VC-4-X Layer Trail Protection Functions.19 5.10.1 VC-4-X Trail Protection Connection Functions S4-XP_C.19 5.10.1.1 VC-4-X Layer 1+1 uni-directional Protection Connection Function S4-XP1+1u_C.19 5.10.1.2 VC-4-X Layer 1+1 bi-directional Protection Connection Function S4-XP1+1b_C.19 5.10.2 VC-4 Layer Trail Protection Trail Termination Functions.19 5.10.2.1 VC-4-X Protection Trail Termination Source S4-XP_TT_So.19 5.10.2.2 VC-4-X Protection Trail Termination Sink S4-XP_TT_Sk.19 5.10.3 VC-4 Layer Linear Trail Protection Adaptation Functions.20 5.10.3.1 VC-4-X trail to VC-4-X trail Protection Layer Adaptation Source S4-X/S4-XP_A_So.20 5.10.3.2 VC-4-X trail to VC-4-X trail Protection Layer Adaptation Sink S4-X/S4-XP_A_Sk.20 5.11 VC-4-X layer clock adaptation source (S4-X-LC_A_So).20 6 Concatenated VC-3 path layer functions.21 6.1 Atomic functions overview.21 6.2 Layer information.22 6.2.1 VC-3-X layer access point.22 6.2.2 VC-3-X layer connection point.23 6.2.3 VC-3-Xv layer connection point.23 6.2.4 VC-3-XP layer access point.24 6.2.5 VC-3XP layer connection point.25 6.3 VC-3-Xv Layer Trail Termination Functions S3-Xc_TT.25 6.3.1 VC-3-Xv/VC-3-X Adaptation Source Function S3-Xv/S3-X_A_So.25 6.3.2 VC-3-Xv/VC-3-X Adaptation Sink Function S3-Xv/S3-X_A_Sk.25 6.3.3 VC-3-Xv Layer Trail Termination Source Function S3-Xv_TT_So.25 6.3.4 VC-3-Xv Layer Trail Termination Sink Function S3-Xv_TT_Sk.25 6.4 VC-3-x Layer Adaptation Functions.26 6.4.1 VC-3-x to P0s Adaptation Source Function S3-x/P0s_A_So.26 6.4.2 VC-3-x to P0s Adaptation Sink Function S3-x/P0s_A_Sk.26 6.4.3 VC-3-x to HDLC Adaptation Source Function S3-x/HDLC_A_So.26 6.4.4 VC-3-x to HDLC Adaptation Sink Function S3-x/HDLC_A_Sk.26 6.4.5 VC-3-x to Avp Adaptation Source Function S3-x/Avp_A_So.26 6.4.6 VC-3-x to Avp Adaptation Sink Function S3-x/Avp_A_Sk.26 6.4.7 VC-3-x to TSS3 Adaptation Source Function S3-x/TSS3_A_So.26 6.4.8 VC-3-x to TSS3 Adaptation Sink Function S3-x/TSS3_A_Sk.26 6.5 VC-3-X Layer Trail Protection Functions.27 6.5.1 VC-3-X Trail Protection Connection Functions S3-XP_C.27 6.5.1.1 VC-3-X Layer 1+1 uni-directional Protection Connection Function S3-XP1+1u_C.27 6.5.1.2 VC-3-X Layer 1+1 bi-directional Protection Connection Function S3-XP1+1b_C.27 6.5.2 VC-3 Layer Trail Protection Trail Termination Functions.27 6.5.2.1 VC-3-X Protection Trail Termination Source S3-XP_TT_So.27 6.5.2.2 VC-3-X Protection Trail Termination Sink S3-XP_TT_Sk.27 6.5.3 VC-3 Layer Linear Trail Protection Adaptation Functions.27 6.5.3.1 VC-3-X trail to VC-3-X trail Protection Layer Adaptation Source S3-X/S3-XP_A_So.27 6.5.3.2 VC-3-X trail to VC-3-X trail Protection Layer Adaptation Sink S3-X/S3-XP_A_Sk.28 6.6 VC-3-X layer clock adaptation source (S3-X-LC_A_So).28 7 Concatenated VC-2 path layer functions.29 7.1 Atomic functions overview.29 7.2 Layer information.30 7.2.1 VC-2-X layer access point.30 7.2.2 VC-2-X layer connection point.31 7.2.3 VC-2-Xv layer connection point.31 7.2.4 VC-2-XP layer access point.32 7.2.5 VC-2XP layer connection point.33 7.3 VC-2-Xv Layer Trail Termination Functions S2-Xc_TT.33 7.3.1 VC-2-Xv/VC-2-X Adaptation Source Function S2-Xv/S2-X_A_So.33 7.3.2 VC-2-Xv/VC-2-X Adaptation Sink Function S2-Xv/S2-X_A_Sk.33 7.3.3 VC-2-Xv Layer Trail Termination Source Function S2-Xv_TT_So.33 7.3.4 VC-2-Xv Layer Trail Termination Sink Function S2-Xv_TT_Sk.33 7.4 VC-2-x Layer Adaptation Functions.33 7.4.1 VC-2-X to HDLC Adaptation Source Function S2-X/HDLC_A_So.33 7.4.2 VC-2-X to HDLC Adaptation Sink Function S2-X/HDLC_A_Sk.33 SIST EN 300 417-9-1 V1.1.1:2003

ETSI ETSI EN 300 417-9-1 V1.1.1 (2001-09)5 7.4.3 VC-2-X to Avp Adaptation Source Function S2-X/Avp_A_So.34 7.4.4 VC-2-X to Avp Adaptation Sink Function S2-X/Avp_A_Sk.34 7.4.5 VC-2-X to TSS4 Adaptation Source Function S2-X/TSS4_A_So.34 7.4.6 VC-2-X to TSS4 Adaptation Sink Function S2-X/TSS4_A_Sk.34 7.5 VC-2-X Layer Trail Protection Functions.34 7.5.1 VC-2-X Trail Protection Connection Functions S2-XP_C.34 7.5.1.1 VC-2-X Layer 1+1 uni-directional Protection Connection Function S2-XP1+1u_C.34 7.5.1.2 VC-2-X Layer 1+1 bi-directional Protection Connection Function S2-XP1+1b_C.34 7.5.2 VC-2 Layer Trail Protection Trail Termination Functions.34 7.5.2.1 VC-2-X Protection Trail Termination Source S2-XP_TT_So.34 7.5.2.2 VC-2-X Protection Trail Termination Sink S2-XP_TT_Sk.35 7.5.3 VC-2 Layer Linear Trail Protection Adaptation Functions.35 7.5.3.1 VC-2-X trail to VC-2-X trail Protection Layer Adaptation Source S2-X/S2-XP_A_So.35 7.5.3.2 VC-2-X trail to VC-2-X trail Protection Layer Adaptation Sink S2-X/S2-XP_A_Sk.35 7.6 VC-2-X layer clock adaptation source (S2-X-LC_A_So).35 8 Concatenated VC-12 path layer functions.36 8.1 Atomic functions overview.36 8.2 Layer information.37 8.2.1 VC-12-X layer access point.37 8.2.2 VC-12-X layer connection point.38 8.2.3 VC-12-Xv layer connection point.38 8.2.4 VC-12-XP layer access point.39 8.2.5 VC-12XP layer connection point.40 8.3 VC-12-Xv Layer Trail Termination Functions S12-Xc_TT.40 8.3.1 VC-12-Xv/VC-12-X Adaptation Source Function S12-Xv/S12-X_A_So.40 8.3.2 VC-12-Xv/VC-12-X Adaptation Sink Function S12-Xv/S12-X_A_Sk.40 8.3.3 VC-12-Xv Layer Trail Termination Source Function S12-Xv_TT_So.40 8.3.4 VC-12-Xv Layer Trail Termination Sink Function S12-Xv_TT_Sk.40 8.4 VC-12-x Layer Adaptation Functions.40 8.4.1 VC-12-X to HDLC Adaptation Source Function S12-X/HDLC_A_So.40 8.4.2 VC-12-X to HDLC Adaptation Sink Function S12-X/HDLC_A_Sk.40 8.4.3 VC-12-X to Avp Adaptation Source Function S12-X/Avp_A_So.41 8.4.4 VC-12-X to Avp Adaptation Sink Function S12-X/Avp_A_Sk.41 8.4.5 VC-12-X to TSS4 Adaptation Source Function S12-X/TSS4_A_So.41 8.4.6 VC-12-X to TSS4 Adaptation Sink Function S12-X/TSS4_A_Sk.41 8.5 VC-12-X Layer Trail Protection Functions.41 8.5.1 VC-12-X Trail Protection Connection Functions S12-XP_C.41 8.5.1.1 VC-12-X Layer 1+1 uni-directional Protection Connection Function S12-XP1+1u_C.41 8.5.1.2 VC-12-X Layer 1+1 bi-directional Protection Connection Function S12-XP1+1b_C.41 8.5.2 VC-12 Layer Trail Protection Trail Termination Functions.41 8.5.2.1 VC-12-X Protection Trail Termination Source S12-XP_TT_So.41 8.5.2.2 VC-12-X Protection Trail Termination Sink S12-XP_TT_Sk.42 8.5.3 VC-12 Layer Linear Trail Protection Adaptation Functions.42 8.5.3.1 VC-12-X trail to VC-12-X trail Protection Layer Adaptation Source S12-X/S12-XP_A_So.42 8.5.3.2 VC-12-X trail to VC-12-X trail Protection Layer Adaptation Sink S12-X/S12-XP_A_Sk.42 8.6 VC-12-X layer clock adaptation source (S12-X-LC_A_So).42 Annex A (informative): Concatenated VC-11 path layer functions.44 A.1 Atomic functions overview.44 A.2 Layer information.45 A.2.1 VC-11-X layer access point.45 A.2.2 VC-11-X layer connection point.46 A.2.3 VC-11-Xv layer connection point.46 A.2.4 VC-11-XP layer access point.47 A.2.5 VC-11XP layer connection point.48 A.3 VC-11-Xv Layer Trail Termination Functions S11-Xc_TT.48 A.3.1 VC-11-Xv/VC-11-X Adaptation Source Function S11-Xv/S11-X_A_So.48 A.3.2 VC-11-Xv/VC-11-X Adaptation Sink Function S11-Xv/S11-X_A_Sk.48 A.3.3 VC-11-Xv Layer Trail Termination Source Function S11-Xv_TT_So.48 SIST EN 300 417-9-1 V1.1.1:2003

ETSI ETSI EN 300 417-9-1 V1.1.1 (2001-09)6 A.3.4 VC-11-Xv Layer Trail Termination Sink Function S11-Xv_TT_Sk.48 A.4 VC-11-x Layer Adaptation Functions.49 A.4.1 VC-11-X to HDLC Adaptation Source Function S11-X/HDLC_A_So.49 A.4.2 VC-11-X to HDLC Adaptation Sink Function S11-X/HDLC_A_Sk.49 A.4.3 VC-11-X to Avp Adaptation Source Function S11-X/Avp_A_So.49 A.4.4 VC-11-X to Avp Adaptation Sink Function S11-X/Avp_A_Sk.49 A.4.5 VC-11-X to TSS4 Adaptation Source Function S11-X/TSS4_A_So.49 A.4.6 VC-11-X to TSS4 Adaptation Sink Function S11-X/TSS4_A_Sk.49 A.5 VC-11-X Layer Trail Protection Functions.50 A.5.1 VC-11-X Trail Protection Connection Functions S11-XP_C.50 A.5.1.1 VC-11-X Layer 1+1 uni-directional Protection Connection Function S11-XP1+1u_C.50 A.5.1.2 VC-11-X Layer 1+1 bi-directional Protection Connection Function S11-XP1+1b_C.50 A.5.2 VC-11 Layer Trail Protection Trail Termination Functions.50 A.5.2.1 VC-11-X Protection Trail Termination Source S11-XP_TT_So.50 A.5.2.2 VC-11-X Protection Trail Termination Sink S11-XP_TT_Sk.50 A.5.3 VC-11 Layer Linear Trail Protection Adaptation Functions.50 A.5.3.1 VC-11-X trail to VC-11-X trail Protection Layer Adaptation Source S11-X/S11-XP_A_So.50 A.5.3.2 VC-11-X trail to VC-11-X trail Protection Layer Adaptation Sink S11-X/S11-XP_A_Sk.51 A.6 VC-11-X layer clock adaptation source (S11-X-LC_A_So).51 History.52
ETSI ETSI EN 300 417-9-1 V1.1.1 (2001-09)7 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http://www.etsi.org/legal/home.htm). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Transmission and Multiplexing (TM). The present document is part of a library of functional blocks for the functional description of the European Transmission Hierarchy. The present document is part 9, sub-part 1 of a multi-part deliverable covering the generic requirements of transport functionality of equipment, as identified below: Part 1: "Generic processes and performance"; Part 2: "Synchronous Digital Hierarchy (SDH) and Plesiochronous Digital Hierarchy (PDH) physical section layer functions"; Part 3: "Synchronous Transport Module-N (STM-N) regenerator and multiplex section layer functions"; Part 4: "Synchronous Digital Hierarchy (SDH) path layer functions"; Part 5: "Plesiochronous Digital Hierarchy (PDH) path layer functions"; Part 6: "Synchronization layer functions"; Part 7: "Equipment management and auxiliary layer functions"; Part 9: "Synchronous Digital Hierarchy (SDH) concatenated path layer functions"; Sub-part 1: "Requirements".
National transposition dates Date of adoption of this EN: 21 September 2001 Date of latest announcement of this EN (doa): 31 December 2001 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
30 June 2002 Date of withdrawal of any conflicting National Standard (dow): 30 June 2002
ETSI ETSI EN 300 417-9-1 V1.1.1 (2001-09)8 1 Scope The present document specifies requirements of transport functionality of equipment, which processes SDH concatenated path layers. The functionality is described by a set of functional building blocks and a set of rules by which they are combined. The generic description method and generic functionality is described in EN 300 417-1-1 [1] and ITU-T Recommendation G.806 [2]. For equipment which is compliant with the present document the processing of SDH concatenated path layers with in the equipment shall be describable as an interconnection of a subset of the functional blocks contained within the present document.
2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. • References are either specific (identified by date of publication and/or edition number or version number) or non-specific. • For a specific reference, subsequent revisions do not apply. • For a non-specific reference, the latest version applies. [1] ETSI EN 300 417-1-1: "Transmission and Multiplexing (TM); Generic requirements of transport functionality of equipment; Part 1-1: Generic processes and performance". [2] ITU-T Recommendation G.806 (2000): "Characteristics of Transport Equipment - Description Methodology and Generic Functionality". [3] ETSI EN 300 417-4-1: "Transmission and Multiplexing (TM); Generic requirements of transport functionality of equipment; Part 4-1: Synchronous Digital Hierarchy (SDH) path layer functions". [4] ITU-T Recommendation G.783 (2000): "Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks". [5] ETSI EN 300 147: "Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH); Multiplexing structure". [6] ETSI EN 301 163-2-1: "Transmission and Multiplexing (TM); Generic requirements of Asynchronous Transfer Mode (ATM) transport functionality within equipment; Part 2-1: Functional model for the transfer and layer management plane". 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: concatenation: procedure whereby a multiplicity of Virtual Containers is associated one with another with the result that their combined capacity can be used as a single container across which bit sequence integrity is maintained Two versions exists: - Contiguous concatenation; - Virtual concatenation. SIST EN 300 417-9-1 V1.1.1:2003

ETSI ETSI EN 300 417-9-1 V1.1.1 (2001-09)9 3.2 Symbols For the purposes of the present document, the following symbols apply: c contiguous concatenation v virtual concatenation 3.3 Abbreviations For the purposes of the present document, the following abbreviations apply: _I Interworking Function S4-X Concatenated VC-4 path layer S4-Xc Contiguous concatenated VC-4 path layer S4-Xv Virtual concatenated VC-4 path layer S3-X Concatenated VC-3 path layer S3-Xv Virtual concatenated VC-3 path layer S2-X Concatenated VC-2 path layer S2-Xv Virtual concatenated VC-2 path layer S12-X Concatenated VC-12 path layer S12-Xv Virtual concatenated VC-12 path layer S11-X Concatenated VC-11 path layer S11-Xv Virtual concatenated VC-11 path layer 4 Generic Processes 4.1 Layer network interworking function Refer to ITU-T Recommendation G.806 [2], clause 5.6.4 " Layer network interworking function ". 4.2 Virtual concatenation multiframe alignment Refer to ITU-T Recommendation G.783 [4], clause 8.2.5 "Virtual concatenation multiframe alignment". SIST EN 300 417-9-1 V1.1.1:2003

ETSI ETSI EN 300 417-9-1 V1.1.1 (2001-09)10 5 Concatenated VC-4 path layer functions 5.1 Atomic functions overview S4-XvS4-X/P0sS4-XcS4-Xv>S4-XcS4-XcS4-XcmS4-X/AvpS4-XcS4-X/AvpS4-X/P0sS4-Xc>S4-XvS4-Xv1X1X1XX1S4-Xc_CIS4-Xc_CIS4-Xc_CIS4-X_AIS4-Xv_CI=XS4_CIS4-Xc_CIS4-Xc_CIS4-Xc_CIS4-X_AIS4-Xc_CIS4-X/HDLCAvp_CIP0_CIHDLC_CIAvp_CIP0_CIS4-X/HDLCHDLC_CIS4-Xv_CI=XS4_CIS4-Xv_CI=XS4_CIS4-Xv_CI=XS4_CIS4-X-LCSD_CIS4-X_TIS4-XAPS4functionsS4-XcsS4-XcsS4-XcDmS4-XcDS4-XcDS4-XcD/S4-XcS4-XcD/S4-XcS4-Xc_CIS4-Xc_CIS4-X APS4-XAPS4-XcCPS4-Xc_CIS4-Xc_CIS4-Xc_CIS4-Xc_CIS4-X_AIS4-X_AIRIRI (to S4-Xv_So)TSF/DTSF/DS4functionsS4-X APS4-XcCPRI (from S4-Xv_Sk)S4-X/TSS1S4-X/TSS1 Figure 1: Concatenated VC-4 path layer atomic functions Figure 1 shows the set of atomic functions for the concatenated VC-4 path layer. Figure 2 shows the additional functions for the concatenated VC-4 layer trail protection. It should be noted that the S4-X/P0s_A function can be absent, or connected before or after the protection functions S4-XP_C. When connected before S4-XP_C the transport of the user channel signal is not protected, otherwise it is protected. Figures 1 and 2 show that more than one adaptation function exists in the S4-X layer that can be connected to one S4-X access point. For such cases, a subset of these adaptation source functions is allowed to be activated together, but only one adaptation source function may have access to a specific timeslot. Access to the same timeslot by other adaptation source functions shall be denied. In contradiction with the source direction, adaptation sink functions may be activated all together. This may cause faults to be detected and reported. To prevent this an adaptation sink function can be deactivated. NOTE: If one adaptation function only is connected to the AP, it will be activated. If one or more other functions are connected to the same AP accessing the same timeslot, one out of the set of functions will be active. SIST EN 300 417-9-1 V1.1.1:2003

ETSI ETSI EN 300 417-9-1 V1.1.1 (2001-09)11 S4-XPS4-XPS4-X/AvpS4-XPS4-X/AvpS4-XP_CIS4-XP_CIS4-X_AIS4-XP_CIS4-XP_CIS4-X_AIS4-X/HDLCAvp_CIHDLC_CIAvp_CIS4-X/HDLCHDLC_CIS4-X/S4-XPS4-X/S4-XPS4-X/P0sP0s_CIS4-X/P0sP0s_CIS4-XP_AIS4-XP_AIS4-Xc/vS4-Xc/v Figure 2: Concatenated VC-4 Layer Trail Protection atomic functions 5.2 Layer information 5.2.1 VC-4-X layer access point C2F2F3K31XX+1X261VC-4-X payload(X  9  260 bytes)1-45-8K3undefined125 µsAPS Figure 3: S4-X_AI_D The VC-4-X AI (S4-x_AI_D) at this point is octet structured with a 125 µs frame. It represents adapted client layer information comprising X • 2 340 bytes of client layer information, the signal label byte C2, and the 2 path user channel bytes F2/3 as defined in EN 300 147 [5]. For the case the signal has passed the trail protection sublayer, S4_AI has defined APS bits (1 to 4) in byte K3. SIST EN 300 417-9-1 V1.1.1:2003

ETSI ETSI EN 300 417-9-1 V1.1.1 (2001-09)12 NOTE 1: The APS signal has not been defined; a multiframed APS signal might be required. NOTE 2: Bits 1 to 4 of byte K3 will be undefined when the signal S4-X_AI has not been processed in a trail protection connection function S4-XP_C. NOTE 3: Bytes F2 and F3 will be undefined when the adaptation functions sourcing these bytes are not present in the network element. A VC-4-X comprises one of the following payloads: - an ATM X • 149 760 kbit/s cell stream signal; - a PPP X • 149 760 kbit/s cell stream signal; - a Test Signal Structure (TSS1). 5.2.2 VC-4-X layer connection point A VC-4 concatenated trail can be transported via contiguous concatenated VC-4 (VC-4-Xc) or virtual concatenated VC-4 (VC-4-Xv) connections. If the concatenated VC-4-X trail is supported by a contiguous concatenated VC-4-Xc connection, the only allowed values for X are 4 and 16. If the concatenated VC-4-X trail is supported by a virtual concatenated VC-4-Xv connection all values for X ≥ 1 are allowed. 5.2.3 VC-4-Xc layer connection point C2F2F3K31XX+1X261VC-4-X payload(X  9  260 bytes)1-46-8G1undefined125 µsREIJ1B3G1H4N1RDI5X = 4, 161-47-8IEC6OEIREI5N1FASTraceRDIODIres.res.res.1-89-72737475-76res. Figure 4: S4-Xc_CI_D The CI of a VC-4-Xc (S4-Xc_CI_D) signal is octet structured with a 125 µs frame. Its format is characterized as S4-X_AI plus the VC-4 trail termination overhead in the J1, B3, and G1 locations as defined in EN 300 147 [5] NOTE: H4 is not used in VC-4-Xc SIST EN 300 417-9-1 V1.1.1:2003

ETSI ETSI EN 300 417-9-1 V1.1.1 (2001-09)13 5.2.4 VC-4-Xv layer connection point 1261C21/X VC-4-X payload(X 9  260 bytes)J1B3G1H4N1F2F3K312611-46-8G1125 µsREIC2F2F3K31/X VC-4-X payload(9  260 bytes)J1B3G1H4N1REI51261C21/X VC-4-X payload(9  260 bytes)J1B3G1H4N1F2F3K3125 µsundefined1-45-8H4MFIunusedVC-4[1]VC-4[2]VC-4[X]1-1415-16SQ Figure 5: S4-Xv_CI_D The CI of a VC-4-Xv (S4-Xv_CI_D) consists of X times S4_CI as defined in EN 300 417-1-1 [1]. The H4 byte is generated as defined in EN 300 147 [5]. The mapping of S4-X_AI to S4-Xv_CI is performed as shown in figure 6. NOTE: F2, F3 and K3 of VC-4[2.X] are undefined. SIST EN 300 417-9-1 V1.1.1:2003

ETSI ETSI EN 300 417-9-1 V1.1.1 (2001-09)14 C2F2F3K31/X VC-4-X payload(9  260 bytes)J1B3G1H4N1C2F2F3K31XX+1X261VC-4-X payload(X 9  260 bytes)2X1261C2F2F3K31/X VC-4-X payload(9  260 bytes)J1B3G1H4N1VC-4[1]1261VC-4[X] Figure 6: S4-X_AI_D to S4-Xv_CI_D mapping 5.2.5 VC-4-XP layer access point C2F2F3K31XX+1X261VC-4-X payload(X  9  260 bytes)1-45-8K3undefined125 µsAPS Figure 7: S4-XP_AI_D The S4-XP AI is identical to the S4-X AI with defined APS information if the protection scheme uses it. SIST EN 300 417-9-1 V1.1.1:2003

ETSI ETSI EN 300 417-9-1 V1.1.1 (2001-09)15 5.2.6 VC-4-XP layer connection point C2F2F3K31XX+1X261VC-4-X payload(X  9  260 bytes)undefined125 µs Figure 8: S4-XP_CI_D The S4-XP CI is identical to the S4-X AI, with undefined APS information. NOTE: The presence/absence of F2/F3 depends on the location of the S4-X/P0s_A function. 5.3 VC-4-Xc Layer Connection Function S4-Xc_C Refer to EN 300 417-4-1 [3], clause 4.1 "VC-4 Layer Connection Function S4_C" with: - S4 => S4-Xc; - VC-4 => VC-4-Xc. 5.3.1 SNC protection Refer to EN 300 417-4-1 [3], clause 4.1.1 "SNC protection" with: - S4 => S4-Xc; - VC-4 => VC-4-Xc. 5.4 VC-4-Xc Layer Trail Termination Functions S4-Xc_TT 5.4.1 VC-4-Xc Layer Trail Termination Source Function S4-Xc_TT_So Refer to EN 300 417-4-1 [3], clause 4.2.1 "VC-4 Layer Trail Termination Source S4_TT_So" with: - S4 => S4-Xc; - VC-4 => VC-4-Xc. SIST EN 300 417-9-1 V1.1.1:2003

ETSI ETSI EN 300 417-9-1 V1.1.1 (2001-09)16 5.4.2 VC-4-Xc Layer Trail Termination Sink Function S4-Xc_TT_So Refer to EN 300 417-4-1 [3], clause 4.2.2 "VC-4 Layer Trail Termination Sink S4_TT_Sk" with: - S4 => S4-Xc; - VC-4 => VC-4-Xc. 5.5 VC-4-Xc Layer Monitoring Functions 5.5.1 VC-4-Xc Non-intrusive Monitoring Function S4-Xcm_TT_Sk Refer to EN 300 417-4-1 [3], clause 4.4.1 "VC-4 Layer Non-intrusive Monitoring Function S4m_TT_Sk" with: - S4 => S4-Xc; - VC-4 => VC-4-Xc. 5.5.2 VC-4-Xc Supervisory Unequipped Termination Source Function S4-Xcs_TT_So Refer to EN 300 417-4-1 [3], clause 4.4.2 "VC-4 Layer Supervisory-Unequipped Termination Source S4s_TT_So" with: - S4 => S4-Xc; - VC-4 => VC-4-Xc. 5.5.3 VC-4-Xc Supervisory Unequipped Termination Sink Function S4-Xcs_TT_Sk Refer to EN 300 417-4-1 [3], clause 4.4.3 "VC-4 Layer Supervisory-Unequipped Termination Sink S4s_TT_Sk" and with: - S4 => S4-Xc; - VC-4 => VC-4-Xc. 5.6 VC-4-Xc Tandem Connection Sublayer Functions 5.6.1 VC-4-Xc Tandem Connection Trail Termination Source Function S4-XcD_TT_So Refer to EN 300 417-4-1 [3], clause 4.6.1 "VC-4 Tandem Connection Trail Termination Source function (S4D_TT_So)" with: - S4 => S4-Xc; - VC-4 => VC-4-Xc. SIST EN 300 417-9-1 V1.1.1:2003

ETSI ETSI EN 300 417-9-1 V1.1.1 (2001-09)17 5.6.2 VC-4-Xc Tandem Connection Trail Termination Sink Function S4-XcD_TT_Sk Refer to EN 300 417-4-1 [3], clause 4.6.2 "VC-4 Tandem Connection Trail Termination Sink function (S4D_TT_Sk)" with: - S4 => S4-Xc; - VC-4 => VC-4-Xc. 5.6.3 VC-4-Xc Tandem Connection Non-intrusive Monitoring Trail Termination Sink Function S4-XcDm_TT_Sk Refer to EN 300 417-4-1 [3], clause 4.6.5 "VC-4 Tandem Connection Non-intrusive Monitoring Trail Termination Sink function (S4Dm_TT_Sk)" with: - S4 => S4-Xc; - VC-4 => VC-4-Xc. 5.6.4 VC-4-Xc Tandem Connection to VC-4-Xc Adaptation Source Function S4-XcD/S4-Xc_A_So Refer to EN 300 417-4-1 [3], clause 4.6.3 "VC-4 Tandem Connection to VC-4 Adaptation Source function (S4D/S4_A_So)" with: - S4 => S4-Xc; - VC-4 => VC-4-Xc. 5.6.5 VC-4-Xc Tandem Connection to VC-4-Xc Adaptation Sink Function S4-XcD/S4-Xc_A_Sk Refer to EN 300 417-4-1 [3], clause 4.6.4 "VC-4 Tandem Connection to VC-4 Adaptation Sink function (S4D/S4_A_Sk)" with: - S4 => S4-Xc; - VC-4 => VC-4-Xc. 5.7 VC-4-Xv Layer Trail Termination Functions S4-Xc_TT Refer to ITU-T Recommendation G.783 [4], clause 12.5.1.1 "VC-n-Xv Layer Trail Termination Function Sn-Xv_TT" with n = 4. 5.7.1 VC-4-Xv/VC-4-X Adaptation Source Function S4-Xv/S4-X_A_So Refer to ITU-T Recommendation G.783 [4], clause 12.5.1.1.1 "VC-n-Xv/VC-n-X Adaptation Source Function Sn-Xv/Sn-X_A_So" with n = 4. 5.7.2 VC-4-Xv/VC-4-X Adaptation Sink Function S4-Xv/S4-X_A_Sk Refer to ITU-T Recommendation G.783 [4], clause 12.5.1.1.2 "VC-n-Xv/VC-n-X Adaptation Sink Function Sn-Xv/Sn-X_A_Sk" with n = 4. SIST EN 300 417-9-1 V1.1.1:2003

ETSI ETSI EN 300 417-9-1 V1.1.1 (2001-09)18 5.7.3 VC-4-Xv Layer Trail Termination Source Function S4-Xv_TT_So Refer to ITU-T Recommendation G.783 [4], clause 12.5.1.1.3 "VC-n-Xv/VC-n-X Adaptation Source Function Sn-Xv/Sn-X_A_So" with n = 4. 5.7.4 VC-4-Xv Layer Trail Termination Sink Function S4-Xv_TT_Sk Refer to ITU-T Recommendation G.783 [4], clause 12.5.1.1.4 "VC-n-Xv/VC-n-X Adaptation Sink Function Sn-Xv/Sn-X_A_Sk" with n = 4. 5.8 Interworking Functions 5.8.1 VC-4-Xc to VC-4-Xv Interworking Function S4-Xc>S4-Xv_I Refer to ITU-T Recommendation G.783 [4], clause 12.5.2.1 "VC-4-Xc to VC-4-Xv Interworking Function S4-Xc>S4-Xv_I" 5.8.2 VC-4-Xv to VC-4-Xc Interworking Function S4-Xv>S4-Xc_I Refer to ITU-T Recommendation G.783 [4], clause 12.5.2.2 "VC-4-Xv to VC-4-Xc Interworking Function S4-Xv>S4-Xc_I" 5.9 VC-4-X Layer Adaptation Functions 5.9.1 VC-4-X to P0s Adaptation Source Function S4-X/P0s_A_So Refer to EN 300 417-4-1 [3], clause 4.3.7 "VC-4 Layer to P0s Layer Adaptation Source S4/P0s_A_So" with: - S4 => S4-Xc; - VC-4 => VC-4-Xc. 5.9.2 VC-4-X to P0s Adaptation Sink Function S4-X/P0s_A_Sk Re
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