SIST EN 300 417-4-1 V1.2.1:2003

• Abstract:

  Functional requirements for VC path layers of SDH interfaces on all ty pes of equipment based on the generic principles described in part 1-1

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.040.20 - Transmission systems
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: ETSI EN 300 417-4-1 V1.2.1 (2001-10) - Transmission and Multiplexing (TM); Generic requirements of transport functionality of equipment; Part 4-1: Synchronous Digital Hierarchy (SDH) path layer functions

SIST EN 300 417-4-1 V1.2.1:2003 is the Slovenian adoption of ETSI EN 300 417-4-1 Version 1.2.1, published by SIST. It covers Synchronous Digital Hierarchy (SDH) path layer functions for equipment and defines how VC-4, VC-3, VC-2, VC-12 and VC-11 transport functionality is built from functional blocks.

The standard is for equipment designers, integrators, test labs and network operators who need a common way to describe, implement and verify SDH path-layer behavior. It is based on the generic principles in EN 300 417-1-1 and turns them into concrete source, sink, monitoring, protection and adaptation functions.

What does SIST EN 300 417-4-1 V1.2.1:2003 specify?

SIST EN 300 417-4-1 V1.2.1:2003 specifies a library of basic building blocks and the rules for combining them into a description of transport functionality. A compliant piece of equipment must be describable as an interconnection of a subset of those blocks, and the interconnections must follow the combination rules given in the standard.

The document is organized around the SDH path layers:

• Clause 3 gives definitions, abbreviations and symbols.
• Clause 4 covers VC-4 path layer functions.
• Clause 5 covers VC-3 path layer functions.
• Clause 6 covers VC-2 path layer functions.
• Clause 7 covers VC-12 path layer functions.
• Annex F covers VC-11 path layer functions.

Annex	What it covers
A	VC-n phase accuracy, timing error, jitter and wander; pointer processor introduced phase error measurement; SDH/PDH and PDH/PDH mapping introduced phase error measurement
B	SDH/PDH interconnection examples
C	Interaction between 2 Mbit/s and VC-12 signals for byte synchronous mapping
D	Examples of linear trail and SNC protection models
E	VC-3 to 44 736 kbit/s adaptation functions
F	VC-11 Path Layer Functions

What are the key requirements of SIST EN 300 417-4-1 V1.2.1:2003?

SIST EN 300 417-4-1 V1.2.1:2003 defines the same functional pattern for several SDH layers: a connection function, trail termination functions, adaptation functions, monitoring functions, trail protection functions and tandem connection sublayer functions. In practice, that means the standard tells you what a VC layer must do at the interface, how it handles defects and trace information, and how it maps to and from client signals.

Connection functions route VC layer characteristic information

The connection functions in clauses 4.1, 5.1, 6.1, 7.1 and Annex F route Characteristic Information (CI) between input and output connection points. They use management information such as connection type, directionality, protection type and restoration timing. For implementers, this is the part that defines the connection matrix and the control points needed to build add-drop, cross-connect or protected paths.

Trail termination adds and checks overhead

Trail termination functions in clauses 4.2, 5.2, 6.2, 7.2 and Annex F add or recover the path overhead used for trace, error monitoring and status reporting. The VC-4 and VC-3 functions use bytes such as J1, B3, G1 and C2; the sink side extracts the accepted signal label, trail trace and defect indications, while the source side inserts the transmitted trace identifier and parity information. In practice, this is what lets equipment confirm the signal identity, monitor errors and react to AIS, UNEQ, RDI and REI conditions.

Adaptation functions map client signals into the VC layers

The adaptation functions in clauses 4.3, 5.3, 6.3, 7.3 and Annex F map many different client signals into SDH payloads. The standard includes mappings for P4x, P4e, P0s, DQDB, TSS1, P31x, P31e, P32x, P12x, P12s, P0-31c and ATM Virtual Path signals, as well as clock adaptation and compound adaptation through TUG structures. In practice, this is where the equipment either uses an elastic store, slip buffering, fixed stuffing or pointer adjustments to match the client rate to the SDH clock.

Some of the adaptation functions have specific timing or recovery behavior that matters in testing:

• P0s and other 64 kbit/s mappings use slip buffering.
• P4x, P4e, P31x, P31e, P32x and similar functions use justification decisions and pointer-related phase control.
• The sink functions detect signal-label mismatches, loss of frame, loss of pointer and AIS conditions, and then force all-ONEs output for a defined recovery behavior.

Compound VC-4 to VC-3/VC-2/VC-12/VC-11 adaptation uses TUG access

Clause 4.3.5 and 4.3.6 define compound adaptation between VC-4 and VC-3/VC-2/VC-12/VC-11 through TUG access. The standard uses parameters K, L and M to identify the TUG-3, TUG-2 and TU-12 timeslots, and it defines separate source and sink functions for TUG termination and for adaptation to the lower-order VC layers. For readers, this means the document is not just about payload formats - it also defines how lower-order tributaries are selected, multiplexed and recovered inside VC-4.

Monitoring functions support non-intrusive supervision

Clauses 4.4, 5.4, 6.4, 7.4 and Annex F define Type 1 and Type 2 non-intrusive monitoring functions, plus supervisory-unequipped termination functions. These functions recover trail status and performance information without taking the traffic out of service. In practice, they are used for maintenance, alarm supervision and performance monitoring, so an operator can observe the path while the service keeps running.

Trail protection defines 1+1 switching behavior

Clauses 4.5, 5.5, 6.5, 7.5 and Annex F define trail protection connection, termination and linear protection adaptation functions. The standard covers 1+1 uni-directional and bi-directional protection, with revertive and non-revertive operation, and a switch time of not more than 50 ms for the protection process. For network design and acceptance, this is the part that tells you how fast the equipment should move traffic from working to protection paths during a fault.

Tandem connection sublayer functions support segment monitoring

Clauses 4.6, 5.6, 6.6, 7.6 and Annex F define tandem connection trail termination, tandem connection adaptation and non-intrusive monitoring. These functions use N1 and related bytes to carry incoming error information, AIS information and trace identifiers, and they compensate B3 so that errors can be counted across a managed segment of the path. In practice, this supports fault localization and performance measurement within a carrier network rather than only end-to-end.

Annex A gives the measurement basis for timing effects

Annex A provides the method family for VC-n phase accuracy, timing error, jitter and wander, including pointer processor introduced phase error measurement. That matters when you need to test how stuffing and pointer adjustments affect timing stability, especially for interworking and conformance measurements.

What terms does SIST EN 300 417-4-1 V1.2.1:2003 define?

• Characteristic Information (CI) is the framed signal at a layer interface, including the payload and the layer-specific overhead used by that function.
• Adaptation function (A) is the function that maps one signal format into another, typically by rate matching, stuffing, pointer handling or fixed stuffing.
• Trail Termination (TT) is the end function that adds or extracts overhead for trace, defect detection and performance monitoring.
• Virtual Container (VC) is the SDH path-layer container that carries the adapted signal and its overhead.
• Tributary Unit Group (TUG) is the multiplex structure used to access and combine lower-order tributary units inside higher-order SDH payloads.
• Alarm Indication Signal (AIS) is the all-ONEs signal used to indicate that the carried traffic is unusable or has been replaced.
• Asynchronous Transfer Mode (ATM) is one of the client signal types covered by the adaptation functions through the ATM Virtual Path layer.

Who uses SIST EN 300 417-4-1 V1.2.1:2003?

SIST EN 300 417-4-1 V1.2.1:2003 is used by manufacturers of SDH transport equipment, especially designers of multiplexers, add-drop equipment, cross-connects and protection-capable network nodes. It is also used by test laboratories and acceptance teams that need to check payload mapping, trace handling, AIS behavior, protection switching and tandem connection monitoring.

Quality managers and buyers use it to compare equipment functions against a common SDH path-layer model. Network engineers use it when they need to confirm that a product can carry PDH, ATM, DQDB or test signals through the SDH path layers and still support the expected monitoring and protection behavior.

Which standards are used with SIST EN 300 417-4-1 V1.2.1:2003?

Reference	What it contributes
EN 300 417-1-1	The generic functional definitions, symbols, pointer generation and interpretation, defect handling, protection operation and performance monitoring rules used throughout the document
EN 300 147	The SDH multiplexing structure and byte locations used by the payload labels, overhead bytes and pointer-related fields
EN 300 166	The 64 kbit/s section signal used for P0s adaptation
ETS 300 216	The DQDB mapping and loss of slot delineation behavior used in the DQDB adaptation functions
ETS 300 337	The 2 048 kbit/s frame structure used in the byte synchronous mapping examples
IEEE 802.6	The DQDB payload and Link Status Signal codes used by the DQDB functions
ITU-T O.181	The Test Signal Structure TSS1 PRBS used in the VC-4 test-signal adaptation
EN 301 163-2-1	The ATM transport functional model used by the ATM Virtual Path adaptation references

What does the SIST EN 300 417-4-1 V1.2.1:2003 document contain?

The document contains many block diagrams for atomic and compound SDH functions, together with tables of input and output signals for each layer function. It also includes figures for payload layouts, pointer and justification mechanisms, protection models, tandem connection processing and mapping examples.

Annex A adds calculation and measurement methods for phase error, jitter and wander. Annexes B, C and D give practical interconnection and protection examples, while Annex E and Annex F extend the same functional approach to VC-3 to 44 736 kbit/s adaptation and VC-11 path layer functions.

SLOVENSKI STANDARD
01-december-2003
3UHQRVLQPXOWLSOHNVLUDQMH70±*HQHULþQH]DKWHYH]DSUHQRVQRIXQNFLRQDOQRVW
RSUHPH±GHO)XQNFLMHSODVWLSRWLSULVLQKURQLGLJLWDOQLKLHUDUKLML6'+
Transmission and Multiplexing (TM); Generic requirements of transport functionality of
equipment; Part 4-1: Synchronous Digital Hierarchy (SDH) path layer functions
Ta slovenski standard je istoveten z: EN 300 417-4-1 Version 1.2.1
ICS:
33.040.20 Prenosni sistem Transmission systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

European Standard (Telecommunications series)

Transmission and Multiplexing (TM);
Generic requirements of transport functionality of equipment;
Part 4-1: Synchronous Digital Hierarchy (SDH)
path layer functions
2 ETSI EN 300 417-4-1 V1.2.1 (2001-10)

Reference
REN/TM-01042-4-1
Keywords
architecture, SDH, transmission, interface
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© European Telecommunications Standards Institute 2001.
All rights reserved.
ETSI
3 ETSI EN 300 417-4-1 V1.2.1 (2001-10)
Contents
Intellectual Property Rights.8
Foreword.8
1 Scope.10
2 References.10
3 Definitions, abbreviations and symbols .11
3.1 Definitions.11
3.2 Abbreviations.11
3.3 Symbols and diagrammatic conventions .14
3.4 Introduction.14
4 VC-4 Path Layer Functions.14
4.1 VC-4 Layer Connection Function S4_C .17
4.1.1 SNC Protection.19
4.2 VC-4 Layer Trail Termination Functions.20
4.2.1 VC-4 Layer Trail Termination Source S4_TT_So.20
4.2.2 VC-4 Layer Trail Termination Sink S4_TT_Sk .22
4.3 VC-4 Layer Adaptation Functions .24
4.3.1 VC-4 Layer to P4x Layer Adaptation Source S4/P4x_A_So .24
4.3.2 VC-4 Layer to P4x Layer Adaptation Sink S4/P4x_A_Sk .27
4.3.3 VC-4 Layer to P4e Layer Adaptation Source S4/P4e_A_So.28
4.3.4 VC-4 Layer to P4e Layer Adaptation Sink S4/P4e_A_Sk.29
4.3.5 VC-4 Layer to VC-3, VC-2, VC-12, and VC-11 Layer Compound Adaptation Source Function
S4/SX_A_So.31
4.3.5.1 VC-4 Layer to TUG Adaptation Source Function S4/TUG_A_So .33
4.3.5.2 TUG Termination Source Function TUG_T_So.35
4.3.5.3 TUG to VC-3 Layer Adaptation Source Function TUG/S3_A_So/K.0.0 .35
4.3.5.4 TUG to VC-2 Layer Adaptation Source Function TUG/S2_A_So/K.L.0.37
4.3.5.5 TUG to VC-12 Layer Adaptation Source Function TUG/S12_A_So/K.L.M .40
4.3.5.6 TUG to VC-11 Layer Adaptation Source Function TUG/S11*_A_So/K.L.M .43
4.3.6 VC-4 Layer to VC-3, VC-2, VC-12, and VC-11 Layer Compound Adaptation Sink Function
S4/SX_A_Sk.46
4.3.6.1 VC-4 Layer to TUG Adaptation Sink Function S4/TUG_A_Sk.48
4.3.6.2 TUG Termination Sink Function TUG_T_Sk.49
4.3.6.3 TUG to VC-3 Layer Adaptation Sink Function TUG/S3_A_Sk/K.0.0.50
4.3.6.4 TUG to VC-2 Layer Adaptation Sink Function TUG/S2_A_Sk.51
4.3.6.5 TUG to VC-12 Layer Adaptation Sink Function TUG/S12_A_Sk/K.L.M.52
4.3.6.6 TUG to VC-11 Layer Adaptation Sink Function TUG/S11*_A_Sk/K.L.M.53
4.3.7 VC-4 Layer to P0s Layer Adaptation Source S4/P0s_A_So .55
4.3.8 VC-4 Layer to P0s Layer Adaptation Sink S4/P0s_A_Sk .56
4.3.9 VC-4 Layer to DQDB Layer Adaptation Source S4/DQDB_A_So .57
4.3.10 VC-4 Layer to DQDB Layer Adaptation Sink S4/DQDB_A_Sk .59
4.3.11 VC-4 Layer to TSS1 Adaptation Source S4/TSS1_A_So .61
4.3.12 VC-4 Layer to TSS1 Adaptation Sink S4/TSS1_A_Sk .63
4.3.13 VC-4 Layer to ATM Virtual Path Layer Compound Adaptation Source function S4/Avp_A_So .64
4.3.14 VC-4 Layer to ATM Virtual Path Layer Compound Adaptation Sink function S4/Avp_A_Sk.64
4.3.15 VC-4 Layer Clock Adaptation Source S4-LC_A_So.64
4.4 VC-4 Layer Monitoring Functions.64
4.4.1 Type 1 VC-4 Layer Non-intrusive Monitoring Function S4m_TT_Sk .64
4.4.2 VC-4 Layer Supervisory-Unequipped Termination Source S4s_TT_So.66
4.4.3 VC-4 Layer Supervisory-unequipped Termination Sink S4s_TT_Sk .68
4.4.4 Type 2 VC-4 Layer Non-intrusive Monitoring Function S4m2_TT_Sk .70
4.5 VC-4 Layer Trail Protection Functions .72
4.5.1 VC-4 Trail Protection Connection Functions S4P_C .72
4.5.1.1 VC-4 Layer 1+1 uni-directional Protection Connection Function S4P1+1u_C.72
4.5.1.2 VC-4 Layer Protection bi-directional Connection Function S4P1+1b_C .74
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4 ETSI EN 300 417-4-1 V1.2.1 (2001-10)
4.5.2 VC-4 Layer Trail Protection Trail Termination Functions .75
4.5.2.1 VC-4 Protection Trail Termination Source S4P_TT_So.75
4.5.2.2 VC-4 Protection Trail Termination Sink S4P_TT_Sk .76
4.5.3 VC-4 Layer Linear Trail Protection Adaptation Functions .77
4.5.3.1 VC-4 trail to VC-4 trail Protection Layer Adaptation Source S4/S4P_A_So .77
4.5.3.2 VC-4 trail to VC-4 trail Protection Layer Adaptation Sink S4/S4P_A_Sk.78
4.6 VC-4 Tandem Connection Sublayer Functions.79
4.6.1 VC-4 Tandem Connection Trail Termination Source function (S4D_TT_So).79
4.6.2 VC-4 Tandem Connection Trail Termination Sink function (S4D_TT_Sk).82
4.6.3 VC-4 Tandem Connection to VC-4 Adaptation Source function (S4D/S4_A_So) .86
4.6.4 VC-4 Tandem Connection to VC-4 Adaptation Sink function (S4D/S4_A_Sk) .87
4.6.5 VC-4 Tandem Connection Non-intrusive Monitoring Trail Termination Sink function
(S4Dm_TT_Sk) .88
5 VC-3 Path Layer Functions.91
5.1 VC-3 Layer Connection Function S3_C .94
5.1.1 SNC Protection.96
5.2 VC-3 Layer Trail Termination Functions.97
5.2.1 VC-3 Layer Trail Termination Source S3_TT_So.97
5.2.2 VC-3 Layer Trail Termination Sink S3_TT_Sk .99
5.3 VC-3 Layer Adaptation Functions .101
5.3.1 VC-3 Layer to P31x Layer Adaptation Source S3/P31x_A_So .101
5.3.2 VC-3 Layer to P31x Layer Adaptation Sink S3/P31x_A_Sk .104
5.3.3 VC-3 Layer to P31e Layer Adaptation Source S3/P31e_A_So.105
5.3.4 VC-3 Layer to P31e Layer Adaptation Sink S3/P31e_A_Sk.107
5.3.5 VC-3 Layer to P0s Layer Adaptation Source S3/P0s_A_So .109
5.3.6 VC-3 Layer to P0s Layer Adaptation Sink S3/P0s_A_Sk .110
5.3.7 VC-3 Layer to TSS3 Adaptation Source S3/TSS3_A_So .111
5.3.8 VC-3 Layer to TSS3 Adaptation Sink S3/TSS3_A_Sk .112
5.3.9 VC-3 Layer to ATM Virtual Path Layer Compound Adaptation Source function S3/Avp_A_So .113
5.3.10 VC-3 Layer to ATM Virtual Path Layer Compound Adaptation Sink function S3/Avp_A_Sk.113
5.3.11 VC-3 Layer Clock Adaptation Source S3-LC_A_So.113
5.4 VC-3 Layer Monitoring Functions.114
5.4.1 Type 1 VC-3 Layer Non-intrusive Monitoring Function S3m_TT_Sk .114
5.4.2 VC-3 Layer Supervisory-Unequipped Termination Source S3s_TT_So.116
5.4.3 VC-3 Layer Supervisory-unequipped Termination Sink S3s_TT_Sk .117
5.4.4 Type 2 VC-3 Layer Non-intrusive Monitoring Function S3m2_TT_Sk .119
5.5 VC-3 Layer Trail Protection Functions .122
5.5.1 VC-3 Trail Protection Connection Functions S3P_C .122
5.5.1.1 VC-3 Layer 1+1 uni-directional Protection Connection Function S3P1+1u_C.122
5.5.1.2 VC-3 Layer bi-directional Protection Connection Function S3P1+1b_C .123
5.5.2 VC-3 Layer Trail Protection Trail Termination Functions .125
5.5.2.1 VC-3 Protection Trail Termination Source S3P_TT_So.125
5.5.2.2 VC-3 Protection Trail Termination Sink S3P_TT_Sk .126
5.5.3 VC-3 Layer Linear Trail Protection Adaptation Functions .127
5.5.3.1 VC-3 trail to VC-3 trail Protection Layer Adaptation Source S3/S3P_A_So .127
5.5.3.2 VC-3 trail to VC-3 trail Protection Layer Adaptation Sink S3/S3P_A_Sk.127
5.6 VC-3 Tandem Connection Sublayer Functions.128
5.6.1 VC-3 Tandem Connection Trail Termination Source function (S3D_TT_So).128
5.6.2 VC-3 Tandem Connection Trail Termination Sink function (S3D_TT_Sk).131
5.6.3 VC-3 Tandem Connection to VC-3 Adaptation Source function (S3D/S3_A_So) .136
5.6.4 VC-3 Tandem Connection to VC-3 Adaptation Sink function (S3D/S3_A_Sk) .137
5.6.5 VC-3 Tandem Connection Non-intrusive Monitoring Trail Termination Sink function
(S3Dm_TT_Sk) .138
6 VC-2 Path Layer Functions.141
6.1 VC-2 Layer Connection Function S2_C .145
6.1.1 SNC Protection.146
6.2 VC-2 Layer Trail Termination Functions.148
6.2.1 VC-2 Layer Trail Termination Source S2_TT_So.148
6.2.2 VC-2 Layer Trail Termination Sink S2_TT_Sk .149
6.3 VC-2 Layer Adaptation Functions .151
ETSI
5 ETSI EN 300 417-4-1 V1.2.1 (2001-10)
6.3.1 VC-2 Layer to TSS4 Adaptation Source S2/TSS4_A_So .151
6.3.2 VC-2 Layer to TSS4 Adaptation Sink S2/TSS4_A_Sk .152
6.3.3 VC-2 Layer to ATM Virtual Path Layer Compound Adaptation Source function S2/Avp_A_So .153
6.3.4 VC-2 Layer to ATM Virtual Path Layer Compound Adaptation Sink function S2/Avp_A_Sk.153
6.3.5 VC-2 Layer Clock Adaptation Source S2-LC_A_So.153
6.4 VC-2 Layer Monitoring Functions.153
6.4.1 Type 1 VC-2 Layer Non-intrusive Monitoring Function S2m_TT_Sk .153
6.4.2 VC-2 Layer Supervisory-Unequipped Termination Source S2s_TT_So.155
6.4.3 VC-2 Layer Supervisory-unequipped Termination Sink S2s_TT_Sk .156
6.4.4 Type 2 VC-2 Layer Non-intrusive Monitoring Function S2m2_TT_Sk .158
6.5 VC-2 Layer Trail Protection Functions .160
6.5.1 VC-2 Trail Protection Connection Functions S2P_C .160
6.5.1.1 VC-2 Layer 1+1 uni-directional Protection Connection Function S2P1+1u_C.160
6.5.1.2 VC-2 Layer 1+1 dual ended Protection Connection Function S2P1+1b_C.162
6.5.2 VC-2 Layer Trail Protection Trail Termination Functions .163
6.5.2.1 VC-2 Protection Trail Termination Source S2P_TT_So.163
6.5.2.2 VC-2 Protection Trail Termination Sink S2P_TT_Sk .164
6.5.3 VC-2 Layer Linear Trail Protection Adaptation Functions .165
6.5.3.1 VC-2 trail to VC-2 trail Protection Layer Adaptation Source S2/S2P_A_So .165
6.5.3.2 VC-2 trail to VC-2 trail Protection Layer Adaptation Sink S2/S2P_A_Sk.166
6.6 VC-2 Tandem Connection Sublayer Functions.167
6.6.1 VC-2 Tandem Connection Trail Termination Source function (S2D_TT_So).167
6.6.2 VC-2 Tandem Connection Trail Termination Sink function (S2D_TT_Sk).170
6.6.3 VC-2 Tandem Connection to VC-2 Adaptation Source function (S2D/S2_A_So) .174
6.6.4 VC-2 Tandem Connection to VC-2 Adaptation Sink function (S2D/S2_A_Sk) .175
6.6.5 VC-2 Tandem Connection Non-intrusive Monitoring Trail Termination Sink function
(S2Dm_TT_Sk) .176
7 VC-12 Path Layer Functions.179
7.1 VC-12 Layer Connection Function S12_C .183
7.1.1 SNC Protection.185
7.2 VC-12 Trail Termination Functions.186
7.2.1 VC-12 Trail Termination Source S12_TT_So.186
7.2.2 VC-12 Trail Termination Sink S12_TT_Sk.188
7.3 VC-12 Adaptation Functions.190
7.3.1 VC-12 to P12x Adaptation Source S12/P12x_A_So .190
7.3.2 VC-12 to P12x Adaptation Sink S12/P12x_A_Sk.192
7.3.3 VC-12 to P12s Adaptation Source S12/P12s_A_So.194
7.3.3.1 Type 1 VC-12 to P12s Adaptation Source S12/P12s-b_A_So.194
7.3.3.2 Type 2 VC-12 to P12s Adaptation Source S12/P12s-a_A_So .197
7.3.4 VC-12 to P12s Adaptation Sink S12/P12s_A_Sk.198
7.3.4.1 Type 1 VC-12 to P12s Adaptation Sink S12/P12s-x_A_Sk.198
7.3.4.2 Type 2 VC-12 to P12s Adaptation Sink S12/P12s-b_A_Sk.200
7.3.4.3 Type 3 VC-12 to P12s Adaptation Sink S12/P12s-a_A_Sk.202
7.3.5 VC-12 to P0-31c Adaptation Source S12/P0-31c_A_So.205
7.3.6 VC-12 to P0-31c Adaptation Sink S12/P0-31c_A_Sk.207
7.3.7 VC-12 Layer to TSS4 Adaptation Source S12/TSS4_A_So .208
7.3.8 VC-12 Layer to TSS4 Adaptation Sink S12/TSS4_A_Sk .209
7.3.9 VC-12 Layer to ATM Virtual Path Layer Compound Adaptation Source function S12/Avp_A_So .210
7.3.10 VC-12 Layer to ATM Virtual Path Layer Compound Adaptation Sink function S12/Avp_A_Sk.210
7.3.11 VC-12 Layer Clock Adaptation Source S12-LC_A_So.210
7.4 VC-12 Layer Monitoring Functions.210
7.4.1 Type 1 VC-12 Layer Non-intrusive Monitoring Function S12m_TT_Sk.210
7.4.2 VC-12 Layer Supervisory-Unequipped Termination Source S12s_TT_So.212
7.4.3 VC-12 Layer Supervisory-unequipped Termination Sink S12s_TT_Sk .214
7.4.4 Type 2 VC-12 Layer Non-intrusive Monitoring Function S12m2_TT_Sk.216
7.5 VC-12 Layer Trail Protection Functions .218
7.5.1 VC-12 Trail Protection Connection Functions S12P_C .218
7.5.1.1 VC-12 Layer 1+1 uni-directional Protection Connection Function S12P1+1u_C.218
7.5.1.2 VC-12 Layer 1+1 dual ended Protection Connection Function S12P1+1b_C .220
7.5.2 VC-12 Layer Trail Protection Trail Termination Functions .221
7.5.2.1 VC-12 Protection Trail Termination Source S12P_TT_So.221
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6 ETSI EN 300 417-4-1 V1.2.1 (2001-10)
7.5.2.2 VC-12 Protection Trail Termination Sink S12P_TT_Sk .222
7.5.3 VC-12 Layer Linear Trail Protection Adaptation Functions .223
7.5.3.1 VC-12 trail to VC-12 trail Protection Layer Adaptation Source S12/S12P_A_So .223
7.5.3.2 VC-12 trail to VC-12 trail Protection Layer Adaptation Sink S12/S12P_A_Sk.224
7.6 VC-12 Tandem Connection Sublayer Functions.225
7.6.1 VC-12 Tandem Connection Trail Termination Source function (S12D_TT_So).225
7.6.2 VC-12 Tandem Connection Trail Termination Sink function (S12D_TT_Sk).228
7.6.3 VC-12 Tandem Connection to VC-12 Adaptation Source function (S12D/S12_A_So) .232
7.6.4 VC-12 Tandem Connection to VC-12 Adaptation Sink function (S12D/S12_A_Sk) .233
7.6.5 VC-12 Tandem Connection Non-intrusive Monitoring Trail Termination Sink function
(S12Dm_TT_Sk) .234
Annex A (informative): Jitter/wander in justification processes .237
A.1 VC-n phase accuracy/timing error/jitter/wander.237
A.2 VC-n pointer processor introduced phase error measurement .237
A.3 SDH/PDH and PDH/PDH mapping introduced phase error measurement.240
Annex B (informative): SDH/PDH interconnection examples .241
Annex C (informative): Interaction between 2 Mbit/s and VC-12 signals for the case of byte
synchronous mapping.243
Annex D (informative): Examples of linear trail and SNC protection models .245
Annex E (informative): VC-3 to 44 736 Mbit/s adaptation functions.248
E.1 VC-3 Layer to P32x Layer Adaptation Source S3/P32x_A_So.248
E.2 VC-3 Layer to P32x Layer Adaptation Sink S3/P32x_A_Sk .250
Annex F (informative): VC-11 Path Layer Functions .253
F.1 VC-11 Layer Connection Function S11_C .257
F.1.1 SNC Protection.258
F.2 VC-11 Trail Termination Functions.260
F.2.1 VC-11 Trail Termination Source S11_TT_So .260
F.2.2 VC-11 Trail Termination Sink S11_TT_Sk .261
F.3 VC-11 Adaptation Functions.263
F.3.1 VC-11 to P11x Adaptation Source S11/P11x_A_So.263
F.3.2 VC-11 to P11x Adaptation Sink S11/P11x_A_Sk .265
F.3.3 VC-11 Layer to TSS4 Adaptation Source S11/TSS4_A_So .267
F.3.4 VC-11 Layer to TSS4 Adaptation Sink S11/TSS4_A_Sk.268
F.3.5 VC-11 Layer Clock Adaptation Source S11-LC_A_So .269
F.4 VC-11 Layer Monitoring Functions.269
F.4.1 Type 1 VC-11 Layer Non-intrusive Monitoring Function S11m_TT_Sk .269
F.4.2 VC-11 Layer Supervisory-Unequipped Termination Source S11s_TT_So .271
F.4.3 VC-11 Layer Supervisory-unequipped Termination Sink S11s_TT_Sk .273
F.4.4 Type 2 VC-11 Layer Non-intrusive Monitoring Function S11m2_TT_Sk .275
F.5 VC-11 Layer Trail Protection Functions.277
F.5.1 VC-11 Trail Protection Connection Functions S11P_C.277
F.5.1.1 VC-11 Layer uni-directional Protection Connection Function S11P1+1u_C.277
F.5.1.2 VC-11 Layer 1+1 dual ended Protection Connection Function S11P1+1b_C.279
F.5.2 VC-11 Layer Trail Protection Trail Termination Functions.280
F.5.2.1 VC-11 Protection Trail Termination Source S11P_TT_So .280
F.5.2.2 VC-11 Protection Trail Termination Sink S11P_TT_Sk .281
F.5.3 VC-11 Layer Linear Trail Protection Adaptation Functions .282
F.5.3.1 VC-11 trail to VC-11 trail Protection Layer Adaptation Source S11/S11P_A_So.282
F.5.3.2 VC-11 trail to VC-11 trail Protection Layer Adaptation Sink S11/S11P_A_Sk.283
ETSI
7 ETSI EN 300 417-4-1 V1.2.1 (2001-10)
F.6 VC-11 Tandem Connection Sublayer Functions.284
F.6.1 VC-11 Tandem Connection Trail Termination Source function (S11D_TT_So) .284
F.6.2 VC-11 Tandem Connection Trail Termination Sink function (S11D_TT_Sk) .287
F.6.3 VC-11 Tandem Connection to VC-11 Adaptation Source function (S11D/S11_A_So).291
F.6.4 VC-11 Tandem Connection to VC-11 Adaptation Sink function (S11D/S11_A_Sk).292
F.6.5 VC-11 Tandem Connection Non-intrusive Monitoring Trail Termination Sink function
(S11Dm_TT_Sk).293
Annex G (informative): Bibliography.297
History .298

ETSI
8 ETSI EN 300 417-4-1 V1.2.1 (2001-10)
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 one of a family of documents that has been produced in order to provide inter-vendor and
inter-operator compatibility of Synchronous Digital Hierarchy (SDH) equipment.
The present document is part 4, sub-part 1 of a multi-part deliverable covering the Generic requirements of transport
functionality of equipment, as identified below:
Part 1-1: "Generic processes and performance";
Part 1-2: "General information about Implementation Conformance Statement (ICS) proforma";
Part 2-1: "Synchronous Digital Hierarchy (SDH) and Plesiochronous Digital Hierarchy (PDH) physical section
layer functions";
Part 2-2: "Synchronous Digital Hierarchy (SDH) and Plesiochronous Digital Hierarchy (PDH) physical section
layer functions; Implementation Conformance Statement (ICS) proforma specification";
Part 3-1: "Synchronous Transport Module-N (STM-N) regenerator and multiplex section layer functions";
Part 3-2: "Synchronous Transport Module-N (STM-N) regenerator and multiplex section layer functions;
Implementation Conformance Statement (ICS) proforma specification";
Part 4-1: "Synchronous Digital Hierarchy (SDH) path layer functions";
Part 4-2: "Synchronous Digital Hierarchy (SDH) path layer functions; Implementation Conformance Statement
(ICS) proforma specification";
Part 5-1: "Plesiochronous Digital Hierarchy (PDH) path layer functions";
Part 5-2: "Plesiochronous Digital Hierarchy (PDH) path layer functions; Implementation Conformance Statement
(ICS) proforma specification";
Part 6-1: "Synchronization layer functions";
Part 6-2: "Synchronization layer functions; Implementation Conformance Statement (ICS) proforma specification";
Part 7-1: "Equipment management and auxiliary layer functions";
Part 9-1: "Synchronous Digital Hierarchy (SDH) concatenated path layer functions; Requirements".
Parts 2 to 7 specify the layers and their atomic functions.
NOTE: The SDH radio equipment functional blocks are addressed by ETSI WG TM4.
Various of the above parts have previously been published as parts of ETS 300 417.
ETSI
9 ETSI EN 300 417-4-1 V1.2.1 (2001-10)
They have been converted to parts of EN 300 417 without technical changes, but some editorial changes have been
necessary (e.g. references). In particular:
- Parts 2-1 and 3-2 have been modified to take account of editorial errors present in edition 1.
- Part 1-1 has had its title change of to align with other parts published at a later date.
Also note that in the meantime parts 8-1, 8-2 and 8-3 have been stopped.

National transposition dates
Date of adoption of this EN: 12 October 2001
Date of latest announcement of this EN (doa): 31 January 2002
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 July 2002
Date of withdrawal of any conflicting National Standard (dow): 31 July 2002

ETSI
10 ETSI EN 300 417-4-1 V1.2.1 (2001-10)
1 Scope
The present document specifies a library of basic building blocks and a set of rules by which they are combined in order
to describe transport functionality of equipment. The library comprises the functional building blocks needed to
completely specify the generic functional structure of the European Transmission Hierarchies. Equipment which is
compliant with the present document shall be describable as an interconnection of a subset of these functional blocks
contained within the present document. The interconnections of these blocks shall obey the combination rules given.
The generic functionality is described in EN 300 417-1-1 [6].
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, edition number, version number, etc.) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies.
[1] ETSI EN 300 147: "Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH);
Multiplexing structure".
[2] ETSI EN 300 166: "Transmission and Multiplexing (TM); Physical and electrical characteristics of
hierarchical digital interfaces for equipment using the 2 048 kbit/s - based plesiochronous or
synchronous digital hierarchies".
[3] ETSI EN 300 167: "Transmission and Multiplexing (TM); Functional characteristics of
2 048 kbit/s interfaces".
[4] ETSI ETS 300 216 (1992): "Network Aspects (NA); Metropolitan Area Network (MAN); Physical
layer convergence procedure for 155,520 Mbit/s".
[5] ETSI ETS 300 337: "Transmission and Multiplexing (TM); Generic frame structures for the
transport of various signals (including Asynchronous Transfer Mode (ATM) cells and
Synchronous Digital Hierarchy (SDH) elements) at the ITU-T Recommendation G.702
hierarchical rates of 2 048 kbit/s, 34 368 kbit/s and 139 264 kbit/s".
[6] ETSI EN 300 417-1-1: "Transmission and Multiplexing (TM); Generic requirements of transport
functionality of equipment; Part 1-1: Generic processes and performance".
[7] ETSI EN 300 417–6–1: "Transmission and Multiplexing (TM); Generic requirements of transport
functionality of equipment; Part 6-1: Synchronization layer functions".
[8] ITU-T Recommendation G.823: "The control of jitter and wander within digital networks which
are based on the 2 048 kbit/s hierarchy".
[9] IEEE Standard 802.6: "IEEE Standard for Information technology - Telecommunications and
information exchange between systems - Local and metropolitan area networks - Specific
requirements - Part 6: Distributed Queue Dual Bus (DQDB) access method and physical layer
specifications".
[10] ITU-T Recommendation O.151 (10/92): "Error performance measuring equipment operating at the
primary rate and above".
[11] ITU-T Recommendation O.181: "Equipment to assess error performance on STM-N interfaces".
[12] ITU-T Recommendation G.706: "Frame alignment and cyclic redundancy check (CRC)
procedures relating to basic frame structures defined in Recommendation G.704".
ETSI
11 ETSI EN 300 417-4-1 V1.2.1 (2001-10)
[13] 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, abbreviations and symbols
3.1 Definitions
The functional definitions are described in EN 300 417-1-1 [6].
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
A Adaptation function
AcSL Accepted Signal Label
AcTI Accepted Trace Identifier
AI Adapted Information
AIS Alarm Indication Signal
AP Access Point
APS Automatic Protection Switch
ARCH ARCHitecture
ATM Asynchronous Transfer Mode
AU Administrative Unit
Avp ATM virtual path
BIP Bit Interleaved Parity
C Connection function
CI Characteristic Information
CK ClocK
CLR CLeaR
CM Connection Matrix
CP Connection Point
CRC Cyclic Redundancy Check
CS Clock Source
D Data
DEC DECrement
DEG DEGraded
DEGM DEGraded Monitor period
DEGTHR DEGraded THreshold
DS Defect Second
DSTATUS Data STATUS
DTYPE Data TYPE
EBC Errored Block Count
ECC Embedded Communications Channel
EDC Error Detection Code
EDCV Error Detection Code Violation
EQ EQuipment
ES Electrical Section
ES Errored Second
EXER EXERcise
EXTCMD EXTernal CoMmanD
ExTI Expected Trace Identifier
F_B Far-end Block
FAS Frame Alignment Signal
FS Frame Start signal
FSw Forced Switch
HEC Header Error Control
HO Hold Off (used in HOTime)
ETSI
12 ETSI EN 300 417-4-1 V1.2.1 (2001-10)
HOB Head Of Bus
ID IDentifier
IM In Multiframe state
INC INCrement
LC Link Connection
LO Lockout Of protection
LOF Loss Of Frame
LOM Loss Of Multiframe
LOP Loss Of Pointer
LOS Loss Of Signal
LSS Loss of Sequence Structure
LSTATUS Link STATUS
LTC Loss of Tandem Connection
MC Matrix Connection
MFP MultiFrame Present
MFAS Multi Frame Alignment Signal
MFS Multi-Frame Start
MI Management Information
MO Managed Object
MON MONitored
MP Management Point
MS Multiplex Section
MS1 STM-1 Multiplex Section
MSP Multiplex Section Protection
MSw Manual Switch
N_B Near-end Block
N1[x][y] bit x (x=7,8) of byte N1 in frame y (y=1.76)
N2[x][y] bit x (x=7,8) of byte N2 in frame y (y=1.76)
NC Network Connection
NCI No CRC-4 multiframe Indication
NDF New Data Flag
NE Network Element
NU National Use (bits, bytes)
ODI Outgoing Defect Indication
OEI Outgoing Error Indication
OF Outgoing Far-end
OF_B Outgoing Far-end VC Block
OH OverHead
ON Outgoing Near-end
OOM Out Of Multiframe state
OPER OPERation
OS Optical Section
OSF Outgoing Signal Fail
OW Order Wire
P Protection
P_A Protection Adaptation
P_C Protection Connection
P_TT Protection Trail Termination
P0s synchronous 64 kbit/s layer
P11x 1 544 kbit/s layer (transparent)
P12s 2 048 kbit/s PDH path layer with synchronous 125 μs frame structure according to EN 300 167 [3]
P12x 2 048 kbit/s layer (transparent)
P22e 8 448 kbit/s PDH path layer with 4 plesiochronous 2 048 kbit/s
P22x 8 448 kbit/s layer (transparent)
P31e 34 368 kbit/s PDH path layer with 4 plesiochronous 8 448 kbit/s
P31s 34 368 kbit/s PDH p
...