ETSI ETS 300 417-4-1 ed.1 (1997-06)

Transmission and Multiplexing (TM); Generic requirements of transport functionality of equipment; Part 4-1: Synchronous Digital Hierarchy (SDH) path layer functions

DE/TM-01015-4-1

Prenos in multipleksiranje (TM) – Generične zahteve za prenosno funkcionalnost opreme – 4-1. del: Funkcije plasti poti pri sinhroni digitalni hierarhiji (SDH)

General Information

• Status: Published
• Publication Date: 29-Jun-1997
• Technical Committee: TM 1 - TM Core networks, fibres and cables
• Current Stage: 12 - Completion
• Due Date: 08-Jul-1997
• Completion Date: 30-Jun-1997
• Ref Project: SIST ETS 300 417-4-1 E1:2003 - Transmission and Multiplexing (TM); Generic requirements of transport functionality of equipment; Part 4-1: Synchronous Digital Hierarchy (SDH) path layer functions

Standards Content (Sample)

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: ETS 300 417-4-1 Edition 1
ICS:
33.040.20 Prenosni sistem Transmission systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN ETS 300 417-4-1
TELECOMMUNICATION June 1997
STANDARD
Source: ETSI TC-TM Reference: DE/TM 01015-4-1
ICS: 33.020
Key words: Transmission, SDH, interface
Transmission and Multiplexing (TM);
Generic requirements of transport
functionality of equipment;
Part 4-1: Synchronous Digital Hierarchy (SDH)
path layer functions
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [e-mail]
Tel.: [phone] - Fax: [phone]
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1997. All rights reserved.

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ETS 300 417-4-1: June 1997
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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ETS 300 417-4-1: June 1997
Contents
Foreword .9
1 Scope .11
2 Normative references.11
3 Definitions, abbreviations and symbols.13
3.1 Definitions .13
3.2 Abbreviations .13
3.3 Symbols and diagrammatic conventions .17
3.4 Introduction .17
4 VC-4 Path Layer Functions .18
4.1 VC-4 Layer Connection Function S4_C.21
4.1.1 SNC Protection.22
4.2 VC-4 Layer Trail Termination Functions .24
4.2.1 VC-4 Layer Trail Termination Source S4_TT_So .24
4.2.2 VC-4 Layer Trail Termination Sink S4_TT_Sk.26
4.3 VC-4 Layer Adaptation Functions .29
4.3.1 VC-4 Layer to P4x Layer Adaptation Source S4/P4x_A_So .29
4.3.2 VC-4 Layer to P4x Layer Adaptation Sink S4/P4x_A_Sk.32
4.3.3 VC-4 Layer to P4e Layer Adaptation Source S4/P4e_A_So.34
4.3.4 VC-4 Layer to P4e Layer Adaptation Sink S4/P4e_A_Sk .36
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 .38
4.3.5.1 VC-4 Layer to TUG Adaptation Source Function
S4/TUG_A_So.40
4.3.5.2 TUG Termination Source Function TUG_T_So .42
4.3.5.3 TUG to VC-3 Layer Adaptation Source Function
TUG/S3_A_So/K.0.0.43
4.3.5.4 TUG to VC-2 Layer Adaptation Source Function
TUG/S2_A_So/K.L.0.45
4.3.5.5 TUG to VC-12 Layer Adaptation Source Function
TUG/S12_A_So/K.L.M.48
4.3.5.6 TUG to VC-11 Layer Adaptation Source Function
TUG/S11*_A_So/K.L.M .51
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.54
4.3.6.1 VC-4 Layer to TUG Adaptation Sink Function
S4/TUG_A_Sk .56
4.3.6.2 TUG Termination Sink Function TUG_T_Sk.58
4.3.6.3 TUG to VC-3 Layer Adaptation Sink Function
TUG/S3_A_Sk/K.0.0.59
4.3.6.4 TUG to VC-2 Layer Adaptation Sink Function
TUG/S2_A_Sk .61
4.3.6.5 TUG to VC-12 Layer Adaptation Sink Function
TUG/S12_A_Sk/K.L.M.63
4.3.6.6 TUG to VC-11 Layer Adaptation Sink Function
TUG/S11*_A_Sk/K.L.M .65
4.3.7 VC-4 Layer to P0s Layer Adaptation Source S4/P0s_A_So .67
4.3.8 VC-4 Layer to P0s Layer Adaptation Sink S4/P0s_A_Sk.69
4.3.9 VC-4 Layer to DQDB Layer Adaptation Source S4/DQDB_A_So.70
4.3.10 VC-4 Layer to DQDB Layer Adaptation Sink S4/DQDB_A_Sk .73
4.3.11 VC-4 Layer to TSS1 Adaptation Source S4/TSS1_A_So .76
4.3.12 VC-4 Layer to TSS1 Adaptation Sink S4/TSS1_A_Sk.77
4.3.13 VC-4 Layer to ATM Virtual Path Layer Compound Adaptation Source
function S4/Avp_A_So .78

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ETS 300 417-4-1: June 1997
4.3.14 VC-4 Layer to ATM Virtual Path Layer Compound Adaptation Sink
function S4/Avp_A_Sk. 78
4.3.15 VC-4 Layer Clock Adaptation Source S4-LC_A_So . 78
4.4 VC-4 Layer Monitoring Functions. 79
4.4.1 VC-4 Layer Non-intrusive Monitoring Function S4m_TT_Sk. 79
4.4.2 VC-4 Layer Supervisory-Unequipped Termination Source S4s_TT_So. 82
4.4.3 VC-4 Layer Supervisory-unequipped Termination Sink S4s_TT_Sk. 84
4.5 VC-4 Layer Trail Protection Functions . 87
4.5.1 VC-4 Trail Protection Connection Functions S4P_C . 87
4.5.1.1 VC-4 Layer 1+1 uni-directional Protection Connection
Function S4P1+1u_C. 87
4.5.1.2 VC-4 Layer Protection bi-directional Connection Function
S4P1+1b_C. 89
4.5.2 VC-4 Layer Trail Protection Trail Termination Functions. 91
4.5.2.1 VC-4 Protection Trail Termination Source S4P_TT_So . 91
4.5.2.2 VC-4 Protection Trail Termination Sink S4P_TT_Sk. 92
4.5.3 VC-4 Layer Linear Trail Protection Adaptation Functions. 93
4.5.3.1 VC-4 trail to VC-4 trail Protection Layer Adaptation
Source S4/S4P_A_So. 93
4.5.3.2 VC-4 trail to VC-4 trail Protection Layer Adaptation Sink
S4/S4P_A_Sk . 94
4.6 VC-4 Tandem Connection Sublayer Functions. 95
4.6.1 VC-4 Tandem Connection Trail Termination Source function
(S4D_TT_So). 95
4.6.2 VC-4 Tandem Connection Trail Termination Sink function (S4D_TT_Sk). 98
4.6.3 VC-4 Tandem Connection to VC-4 Adaptation Source function
(S4D/S4_A_So) . 104
4.6.4 VC-4 Tandem Connection to VC-4 Adaptation Sink function
(S4D/S4_A_Sk) . 105
4.6.5 VC-4 Tandem Connection Non-intrusive Monitoring Trail Termination Sink
function (S4Dm_TT_Sk). 106
5 VC-3 Path Layer Functions. 110
5.1 VC-3 Layer Connection Function S3_C . 113
5.1.1 SNC Protection . 114
5.2 VC-3 Layer Trail Termination Functions . 116
5.2.1 VC-3 Layer Trail Termination Source S3_TT_So. 116
5.2.2 VC-3 Layer Trail Termination Sink S3_TT_Sk . 118
5.3 VC-3 Layer Adaptation Functions . 121
5.3.1 VC-3 Layer to P31x Layer Adaptation Source S3/P31x_A_So. 121
5.3.2 VC-3 Layer to P31x Layer Adaptation Sink S3/P31x_A_Sk . 124
5.3.3 VC-3 Layer to P31e Layer Adaptation Source S3/P31e_A_So . 126
5.3.4 VC-3 Layer to P31e Layer Adaptation Sink S3/P31e_A_Sk. 128
5.3.5 VC-3 Layer to P0s Layer Adaptation Source S3/P0s_A_So. 131
5.3.6 VC-3 Layer to P0s Layer Adaptation Sink S3/P0s_A_Sk . 133
5.3.7 VC-3 Layer to TSS3 Adaptation Source S3/TSS3_A_So. 134
5.3.8 VC-3 Layer to TSS3 Adaptation Sink S3/TSS3_A_Sk . 135
5.3.9 VC-3 Layer to ATM Virtual Path Layer Compound Adaptation Source
function S3/Avp_A_So. 136
5.3.10 VC-3 Layer to ATM Virtual Path Layer Compound Adaptation Sink
function S3/Avp_A_Sk. 136
5.3.11 VC-3 Layer Clock Adaptation Source S3-LC_A_So . 136
5.4 VC-3 Layer Monitoring Functions. 137
5.4.1 VC-3 Layer Non-intrusive Monitoring Function S3m_TT_Sk. 137
5.4.2 VC-3 Layer Supervisory-Unequipped Termination Source S3s_TT_So. 140
5.4.3 VC-3 Layer Supervisory-unequipped Termination Sink S3s_TT_Sk. 142
5.5 VC-3 Layer Trail Protection Functions . 145
5.5.1 VC-3 Trail Protection Connection Functions S3P_C . 145
5.5.1.1 VC-3 Layer 1+1 uni-directional Protection Connection
Function S3P1+1u_C. 145
5.5.1.2 VC-3 Layer bi-directional Protection Connection Function
S3P1+1b_C. 147
5.5.2 VC-3 Layer Trail Protection Trail Termination Functions. 149

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5.5.2.1 VC-3 Protection Trail Termination Source S3P_TT_So .149
5.5.2.2 VC-3 Protection Trail Termination Sink S3P_TT_Sk.150
5.5.3 VC-3 Layer Linear Trail Protection Adaptation Functions .151
5.5.3.1 VC-3 trail to VC-3 trail Protection Layer Adaptation
Source S3/S3P_A_So .151
5.5.3.2 VC-3 trail to VC-3 trail Protection Layer Adaptation Sink
S3/S3P_A_Sk.152
5.6 VC-3 Tandem Connection Sublayer Functions .153
5.6.1 VC-3 Tandem Connection Trail Termination Source function
(S3D_TT_So) .153
5.6.2 VC-3 Tandem Connection Trail Termination Sink function (S3D_TT_Sk).156
5.6.3 VC-3 Tandem Connection to VC-3 Adaptation Source function
(S3D/S3_A_So).162
5.6.4 VC-3 Tandem Connection to VC-3 Adaptation Sink function
(S3D/S3_A_Sk).163
5.6.5 VC-3 Tandem Connection Non-intrusive Monitoring Trail Termination Sink
function (S3Dm_TT_Sk).164
6 VC-2 Path Layer Functions .168
6.1 VC-2 Layer Connection Function S2_C.172
6.1.1 SNC Protection.173
6.2 VC-2 Layer Trail Termination Functions .175
6.2.1 VC-2 Layer Trail Termination Source S2_TT_So .175
6.2.2 VC-2 Layer Trail Termination Sink S2_TT_Sk.177
6.3 VC-2 Layer Adaptation Functions .180
6.3.1 VC-2 Layer to TSS4 Adaptation Source S2/TSS4_A_So .180
6.3.2 VC-2 Layer to TSS4 Adaptation Sink S2/TSS4_A_Sk.181
6.3.3 VC-2 Layer to ATM Virtual Path Layer Compound Adaptation Source
function S2/Avp_A_So .182
6.3.4 VC-2 Layer to ATM Virtual Path Layer Compound Adaptation Sink
function S2/Avp_A_Sk.182
6.3.5 VC-2 Layer Clock Adaptation Source S2-LC_A_So.182
6.4 VC-2 Layer Monitoring Functions .183
6.4.1 VC-2 Layer Non-intrusive Monitoring Function S2m_TT_Sk .183
6.4.2 VC-2 Layer Supervisory-Unequipped Termination Source S2s_TT_So .186
6.4.3 VC-2 Layer Supervisory-unequipped Termination Sink S2s_TT_Sk .188
6.5 VC-2 Layer Trail Protection Functions.191
6.5.1 VC-2 Trail Protection Connection Functions S2P_C.191
6.5.1.1 VC-2 Layer 1+1 uni-directional Protection Connection
Function S2P1+1u_C .191
6.5.1.2 VC-2 Layer 1+1 dual ended Protection Connection
Function S2P1+1b_C .193
6.5.2 VC-2 Layer Trail Protection Trail Termination Functions .195
6.5.2.1 VC-2 Protection Trail Termination Source S2P_TT_So .195
6.5.2.2 VC-2 Protection Trail Termination Sink S2P_TT_Sk.196
6.5.3 VC-2 Layer Linear Trail Protection Adaptation Functions .197
6.5.3.1 VC-2 trail to VC-2 trail Protection Layer Adaptation
Source S2/S2P_A_So .197
6.5.3.2 VC-2 trail to VC-2 trail Protection Layer Adaptation Sink
S2/S2P_A_Sk.198
6.6 VC-2 Tandem Connection Sublayer Functions .199
6.6.1 VC-2 Tandem Connection Trail Termination Source function
(S2D_TT_So) .199
6.6.2 VC-2 Tandem Connection Trail Termination Sink function (S2D_TT_Sk).202
6.6.3 VC-2 Tandem Connection to VC-2 Adaptation Source function
(S2D/S2_A_So).207
6.6.4 VC-2 Tandem Connection to VC-2 Adaptation Sink function
(S2D/S2_A_Sk).208
6.6.5 VC-2 Tandem Connection Non-intrusive Monitoring Trail Termination Sink
function (S2Dm_TT_Sk).209
7 VC-12 Path Layer Functions .213
7.1 VC-12 Layer Connection Function S12_C.217

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ETS 300 417-4-1: June 1997
7.1.1 SNC Protection . 218
7.2 VC-12 Trail Termination Functions . 220
7.2.1 VC-12 Trail Termination Source S12_TT_So. 220
7.2.2 VC-12 Trail Termination Sink S12_TT_Sk . 222
7.3 VC-12 Adaptation Functions . 225
7.3.1 VC-12 to P12x Adaptation Source S12/P12x_A_So . 225
7.3.2 VC-12 to P12x Adaptation Sink S12/P12x_A_Sk. 228
7.3.3 VC-12 to P12s Adaptation Source S12/P12s_A_So . 230
7.3.3.1 Type 1 VC-12 to P12s Adaptation Source S12/P12s-
b_A_So . 230
7.3.3.2 Type 2 VC-12 to P12s Adaptation Source S12/P12s-
a_A_So . 233
7.3.4 VC-12 to P12s Adaptation Sink S12/P12s_A_Sk. 235
7.3.4.1 Type 1 VC-12 to P12s Adaptation Sink S12/P12s-x_A_Sk235
7.3.4.2 Type 2 VC-12 to P12s Adaptation Sink S12/P12s-b_A_Sk237
7.3.4.3 Type 3 VC-12 to P12s Adaptation Sink S12/P12s-a_A_Sk240
7.3.5 VC-12 to P0-31c Adaptation Source S12/P0-31c_A_So. 243
7.3.6 VC-12 to P0-31c Adaptation Sink S12/P0-31c_A_Sk. 245
7.3.7 VC-12 Layer to TSS4 Adaptation Source S12/TSS4_A_So. 247
7.3.8 VC-12 Layer to TSS4 Adaptation Sink S12/TSS4_A_Sk . 248
7.3.9 VC-12 Layer to ATM Virtual Path Layer Compound Adaptation Source
function S12/Avp_A_So. 249
7.3.10 VC-12 Layer to ATM Virtual Path Layer Compound Adaptation Sink
function S12/Avp_A_Sk. 249
7.3.11 VC-12 Layer Clock Adaptation Source S12-LC_A_So . 249
7.4 VC-12 Layer Monitoring Functions. 250
7.4.1 VC-12 Layer Non-intrusive Monitoring Function S12m_TT_Sk. 250
7.4.2 VC-12 Layer Supervisory-Unequipped Termination Source S12s_TT_So. 253
7.4.3 VC-12 Layer Supervisory-unequipped Termination Sink S12s_TT_Sk. 255
7.5 VC-12 Layer Trail Protection Functions . 258
7.5.1 VC-12 Trail Protection Connection Functions S12P_C . 258
7.5.1.1 VC-12 Layer 1+1 uni-directional Protection Connection
Function S12P1+1u_C. 258
7.5.1.2 VC-12 Layer 1+1 dual ended Protection Connection
Function S12P1+1b_C. 260
7.5.2 VC-12 Layer Trail Protection Trail Termination Functions. 262
7.5.2.1 VC-12 Protection Trail Termination Source S12P_TT_So 262
7.5.2.2 VC-12 Protection Trail Termination Sink S12P_TT_Sk. 263
7.5.3 VC-12 Layer Linear Trail Protection Adaptation Functions. 264
7.5.3.1 VC-12 trail to VC-12 trail Protection Layer Adaptation
Source S12/S12P_A_So. 264
7.5.3.2 VC-12 trail to VC-12 trail Protection Layer Adaptation Sink
S12/S12P_A_Sk . 265
7.6 VC-12 Tandem Connection Sublayer Functions. 266
7.6.1 VC-12 Tandem Connection Trail Termination Source function
(S12D_TT_So). 266
7.6.2 VC-12 Tandem Connection Trail Termination Sink function
(S12D_TT_Sk). 270
7.6.3 VC-12 Tandem Connection to VC-12 Adaptation Source function
(S12D/S12_A_So) . 275
7.6.4 VC-12 Tandem Connection to VC-12 Adaptation Sink function
(S12D/S12_A_Sk) . 276
7.6.5 VC-12 Tandem Connection Non-intrusive Monitoring Trail Termination
Sink function (S12Dm_TT_Sk). 277
8 VC-4-4c Path Layer Functions. 281
Annex A (informative): Jitter/wander in justification processes . 282
A.1 VC-n phase accuracy/timing error/jitter/wander . 282
A.2 VC-n pointer processor introduced phase error measurement . 282

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ETS 300 417-4-1: June 1997
A.3 SDH/PDH and PDH/PDH mapping introduced phase error measurement.285
Annex B (informative): SDH/PDH interconnection examples .286
Annex C (informative): Interaction between 2 Mbit/s and VC 12 signals for the case of byte
synchronous mapping .288
Annex D (informative): Examples of linear trail and SNC protection models.290
Annex E (informative): VC-3 to 44 736 Mbit/s adaptation functions.293
E.1 VC-3 Layer to P32x Layer Adaptation Source S3/P32x_A_So .293
E.2 VC-3 Layer to P32x Layer Adaptation Sink S3/P32x_A_Sk.296
Annex F (informative): VC-11 Path Layer Functions .298
F.1 VC-11 Layer Connection Function S11_C .302
F.1.1 SNC Protection .303
F.2 VC-11 Trail Termination Functions .305
F.2.1 VC-11 Trail Termination Source S11_TT_So.305
F.2.2 VC-11 Trail Termination Sink S11_TT_Sk .307
F.3 VC-11 Adaptation Functions .310
F.3.1 VC-11 to P11x Adaptation Source S11/P11x_A_So.310
F.3.2 VC-11 to P11x Adaptation Sink S11/P11x_A_Sk .313
F.3.3 VC-11 Layer to TSS4 Adaptation Source S11/TSS4_A_So.315
F.3.4 VC-11 Layer to TSS4 Adaptation Sink S11/TSS4_A_Sk.316
F.3.5 VC-11 Layer Clock Adaptation Source S11-LC_A_So .317
F.4 VC-11 Layer Monitoring Functions.318
F.4.1 VC-11 Layer Non-intrusive Monitoring Function S11m_TT_Sk.318
F.4.2 VC-11 Layer Supervisory-Unequipped Termination Source S11s_TT_So.321
F.4.3 VC-11 Layer Supervisory-unequipped Termination Sink S11s_TT_Sk.323
F.5 VC-11 Layer Trail Protection Functions .325
F.5.1 VC-11 Trail Protection Connection Functions S11P_C .325
F.5.1.1 VC-11 Layer uni-directional Protection Connection Function S11P1+1u_C325
F.5.1.2 VC-11 Layer 1+1 dual ended Protection Connection Function
S11P1+1b_C.327
F.5.2 VC-11 Layer Trail Protection Trail Termination Functions.329
F.5.2.1 VC-11 Protection Trail Termination Source S11P_TT_So.329
F.5.2.2 VC-11 Protection Trail Termination Sink S11P_TT_Sk .330
F.5.3 VC-11 Layer Linear Trail Protection Adaptation Functions.331
F.5.3.1 VC-11 trail to VC-11 trail Protection Layer Adaptation Source
S11/S11P_A_So.331
F.5.3.2 VC-11 trail to VC-11 trail Protection Layer Adaptation Sink
S11/S11P_A_Sk.332
F.6 VC-11 Tandem Connection Sublayer Functions.333
F.6.1 VC-11 Tandem Connection Trail Termination Source function (S11D_TT_So).333
F.6.2 VC-11 Tandem Connection Trail Termination Sink function (S11D_TT_Sk) .336
F.6.3 VC-11 Tandem Connection to VC-11 Adaptation Source function (S11D/S11_A_So) .341
F.6.4 VC-11 Tandem Connection to VC-11 Adaptation Sink function (S11D/S11_A_Sk).342
F.6.5 VC-11 Tandem Connection Non-intrusive Monitoring Trail Termination Sink function
(S11Dm_TT_Sk).343
Annex G (informative): Bibliography.346
History.347

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ETS 300 417-4-1: June 1997
Foreword
This European Telecommunication Standard (ETS) was produced by the Transmission and Multiplexing
(TM) Technical Committee of the European Telecommunications Standards Institute (ETSI) in order to
provide inter-vendor and inter-operator compatibility of SDH equipments.
This ETS has been produced in order to provide inter-vendor and inter-operator compatibility for transport
functionality of equipment.
This ETS consists of 8 parts as follows:
Part 1: "Generic processes and performance" (ETS 300 417-1-1);
Part 2: "SDH and PDH physical section layer functions" (ETS 300 417-2-1);
Part 3: "STM-N regenerator and multiplex section layer functions" (ETS 300 417-3-1);
Part 4: "SDH path layer functions" (ETS 300 417-4-1);
Part 5: "PDH path layer functions" (ETS 300 417-5-1);
Part 6: "Synchronization distribution layer functions" (ETS 300 417-6-1);
Part 7: "Auxiliary layer functions" (ETS 300 417-7-1);
Part 8: "Compound and major compound functions" (ETS 300 417-8-1).
Transposition dates
Date of adoption: 4 April 1997
Date of latest announcement of this ETS (doa): 30 September 1997
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 March 1998
Date of withdrawal of any conflicting National Standard (dow): 31 March 1998

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ETS 300 417-4-1: June 1997
1 Scope
This European Telecommunication Standard (ETS) 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 this ETS shall be describable
as an interconnection of a subset of these functional blocks contained within this ETS. The
interconnections of these blocks shall obey the combination rules given. The generic functionality is
described in ETS 300 417-1-1 [1].
2 Normative references
This ETS incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references subsequent amendments to, or revisions of, any of these publications
apply to this ETS only when incorporated in it by amendments or revisions. For undated references the
latest edition of the publication referred to applies.
[1] ETS 300 417-1-1: "Transmission and Multiplexing (TM); Generic functional
requirements for Synchronous Digital Hierarchy (SDH) equipment; Part 1-1:
Generic processes and performance".
[2] ETS 300 147: "Transmission and Multiplexing (TM); Synchronous Digital
Hierarchy (SDH) Multiplexing structure".
[3] ETS 300 166 (1993): "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".
[4] ETS 300 417-3-1: "Transmission and Multiplexing (TM); Generic requirements
of transport functionality of equipment; Part 3-1: STM-N regenerator and
multiplex section layer functions".
[5] prETS 300 417-6-1: "Transmission and Multiplexing (TM); Generic requirements
of transport functionality of equipment; Part 6-1: Synchronization distribution
layer functions".
[6] ETS 300 216 (1992): "Network Aspects (NA); Metropolitan Area Network (MAN)
Physical layer convergence procedure for 155,520 Mbit/s".
[7] ITU-T Recommendation G.823: "The control of jitter and wander within digital
networks which are based on the 2 048 kbit/s hierarchy".
[8] ITU-T Recommendation G.751 (1988): "Digital multiplex equipments operating
at the third order bit rate of 34 368 kbit/s and the fourth order bit rate of 139 264
kbit/s and using positive justification".
[9] ITU-T Recommendation O.151: "Error performance measuring equipment
operating at the primary rate and above".
[10] ITU-T Recommendation O.181: "Equipment to assess error performance on
STM-N interfaces".
[11] IEEE Standard 802.6: "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".
[12] ETS 300 167 (1993): "Transmission and Multiplexing (TM); Functional
characteristics of 2 048 kbit/s interfaces".

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ETS 300 417-4-1: June 1997
[13] 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 CCITT
Recommendation G.702 hierarchical rates of 2 048 kbit/s, 34 368 kbit/s and
139 264 kbit/s".
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ETS 300 417-4-1: June 1997
3 Definitions, abbreviations and symbols
3.1 Definitions
The functional definitions are described in ETS 300 417-1-1 [1].
3.2 Abbreviations
For the purposes of this ETS, the following abbreviations apply:
A Adaptation function
AcSL Accepted Signal Label
AcTI Accepted Trace Identifier
ADM Add-Drop Multiplexer
AI Adapted Information
AIS Alarm Indication Signal
AP Access Point
APId Access Point Identifier
APS Automatic Protection Switch
ARCH ARCHitecture
ATM Asynchronous Transfer Mode
AU Administrative Unit
AUG Administrative Unit Group
AU-n Administrative Unit, level n
Avp ATM virtual path
BER Bit Error Ratio
BIP Bit Interleaved Parity
BIP-N Bit Interleaved Parity, width N
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
DCC Data Communications Channel
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
ECC(x) Embedded Communications Channel, layer x
EDC Error Detection Code
EDCV Error Detection Code Violation
EMF Equipment Management Function
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
FOP Failure Of Protocol
FORCEDN FORCE DowN
FS Frame Start signal
FSw Forced Switch
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ETS 300 417-4-1: June 1997
HEC Header Error Control
HO Hold Off (used in HOTime)
HOB Head Of Bus
HOVC Higher Order Virtual Container
HP Higher order Path
ID IDentifier
IF In Frame state
IM In Multiframe state
INC INCrement
incAIS incoming AIS
LC Link Connection
LO Lockout Of protection
LOA Loss Of Alignment; generic for LOF, LOM, LOP
LOF Loss Of Frame
LOM Loss Of Multiframe
LOP Loss Of Pointer
LOS Loss Of Signal
LOVC Lower Order Virtual Container
LSS Loss of Sequence Structure
LSTATUS Link STATUS
LTC Loss of Tandem Connection
MC Matrix Connection
MCF Message Communications Function
MDT Mean Down Time
mei maintenance event information
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
MS16 STM-16 Multiplex Section
MS4 STM-4 Multiplex Section
MSB Most Significant Bit
MSOH Multiplex Section OverHead
MSP Multiplex Section Protection
MSPG Multiplex Section Protection Group
MSw Manual Switch
MTIE Mean Time Interval Error
N.C. Not Connected
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
NMON Not MONitored
NNI Network Node Interface
NU National Use (bits, bytes)
NUx National Use, bit rate order x
OAM Operation, Administration and Management
ODI Outgoing Defect Indication
OEI Outgoing Error Indication
OF Outgoing Far-end
OF_B Outgoing Far-end VC Block
OFS Out of Frame Second
OH OverHead
ON Outgoing Near-end
OOF Out Of Frame state
OOM Out Of Multiframe state
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ETS 300 417-4-1: June 1997
OPER OPERation
OS Optical Section
OSF Outgoing Signal Fail
OSI(x) Open Systems Interconnection, layer x
OW Order Wire
P Protection
P_A Protection Adaptation
P_C Protection Connection
P_TT Protection Trail Termination
P0_31c 1 984 kbit/s layer
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 ETS 300 167 [12]
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 path layer with synchronous 125 μs frame structure
according to ETS 300 337 [13]
P31x 34 368 kbit/s layer (transparent)
P32x 44 736 kbit/s layer (transparent)
P4e 139 264 kbit/s PDH path layer with 4 plesiochronous 34 368 kbit/s
P4s 139 264 kbit/s PDH path layer with synchronous 125 μs frame structure
according to ETS 300 337 [13]
P4x 139 264 kbit/s layer (transparent)
PDH Plesiochronous Digital Hierarchy
PJE Pointer Justification Event
PLM PayLoad Mismatch
PM Performance Monitoring
Pn Plesiochronous signal, level n
POH Path OverHead
ppm part per million
PRBS Pseudo Random Binary Sequence
PRC Primary Reference Clock
PROT PROTection
PS Protection Switching
PSC Protection Switch Count
PTR PoinTeR
QOS Quality Of Service
RD ReaD
RDI Remote Defect Indicator
REI Remote Error Indicator
RFI Remote Failure Indicator
RI Remote Information
RP Remote Point
RS Regenerator Section
RS1 STM-1 Regenerator Section
RS16 STM-16 Regenerator Section
RS4 STM-4 Regenerator Section
RSOH Regenerator Section OverHead
RxSL Received Signal Label
RxTI Received Trace identifier
S11 VC-11 path layer
S11D VC-11 tandem connection sublayer
S11P VC-11 protection sublayer
S12 VC-12 path layer
S12D VC-12 tandem connection sublayer
S12P VC-12 protection sublayer
S2 VC-2 path layer
S2D VC-2 tandem connection sublayer
S2P VC-2 protection sublayer
S3 VC-3 path layer
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ETS 300 417-4-1: June 1997
S3D VC-3 tandem connection sublayer
S3P VC-3 protection sublayer
S4 VC-4 path layer
S4-4c contiguous concatenated VC-4-4c path layer
S4D VC-4 tandem connection sublayer
S4P VC-4 protection sublayer
SASE Stand-Alone Synchronization Equipment
SD synchronization distribution layer, Signal Degrade
SDH Synchronous Digital Hierarchy
SEC SDH Equipment Clock
SF Signal Fail
Sk Sink
SNC Sub-Network Connection
SNC/I Inherently monitored Sub-Network Connection protection
SNC/N Non-intrusively monitored Sub-Network Connection protection
SNC/S Sublayer monitored Sub-Network Connection protection
So Source
SOH Section OverHead
SPRING Shared Protection RING
SR Selected Reference
SSD Server Signal Degrade
SSF Server Signal Fail
SSM Synchronization Status Message
SSU Synchronization Supply Unit
STM Synchronous Transport Module
STM-N Synchronous Transport Module, level N
SW SWitching
TC Tandem Connection
TCn Tandem Connection level n
TCP Termination Connection Point
TI Timing Information
TI Trace Identifier
TIM Trace Identifier Mismatch
TIMdis Trace Identifier Mismatch disable
TM Transmission_Medium, Transmission & Multiplexing
TMN Telecommunications Management Network
TP Timing Point
TPmode Termination Point mode
TS Time Slot
TSD Trail Signal Degrade
TSE Test Signal Error
TSF Trail Signal Fail
TSS Test Signal Structure
TT Trail Termination function
TTI Trail Trace Identifier
TTs Trail Termination supervisory function
TU Tributary Unit
TUG Tributary Unit Group
TxTI Transmitted Trace Identifier
UNEQ UNEQuipped
UNI User Network Interface
UOF Under/Over Flow
USR USeR channels
VC Virtual Container
VC-n Virtual Container, level n
W Working
WR WRite
WTR Wait To Restore
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ETS 300 417-4-1: June 1997
3.3 Symbols and diagrammatic conventions
The symbols and diagrammatic conventions are described in ETS 300 417-1-1 [1].
3.4 Introduction
The atomic and some compound functions used in the SDH Path Layers are defined below (clause 4
onwards).
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ETS 300 417-4-1: June 1997
4 VC-4 Path Layer Functions
SD_CI
S3_CI S12_CI S12_CI S3_C I
S4-LC
Avp_CI Avp_CI
S2_CI S11_CI S11_CI S2_CI
S4_TI
S4/Avp S4/SX S4/SX S4/Avp
P4x_CI P4e_CI DQ DB_CI P4e_CI P4x_CI
P0s_CI DQDB_C I P0s_C I
S4/TSS1 S4/P0s S4/P4x S4/P4e S4/DQ DB S4/DQ DB S4/P4e S4/P4x S4/P0s S4/TSS1
F2 F2
S4_AI S4_AI
S4 RI_R DI, R I_R EI S4
TSF
TS D
S4m
S4s S4s
RI_RDI
TSF, TSD
RI_REI
S 4D/S4 S4D /S4
S4
S4D_AI S4D_AI
S4Dm
S4D S4D
RI_RDI
RI_R EI
RI_ODI
TSF, TSD
RI_O EI
S4_CI S4_CI
Figure 1: VC-4 Path layer atomic functions
VC-4 Layer CP
The CI at this point is octet structured with an 125 μs frame (see figure 2). Its format is characterized as
S4_AI plus the VC-4 trail termination overhead in the J1, B3, and G1 locations as defined in
ETS 300 147 [2] or as an unequipped signal as defined in ETS 300 417-1-1 [1], subclause 7.2. For the
case the signal has passed the tandem connection sublayer, S4_CI has defined VC-4 tandem connection
trail termination overhead in location N1.
NOTE 1: N1 will be undefined when the signal S4_CI has not been processed in a tandem
connection adaptation and trail termination function. N1 is all "0"s in a (supervisory)
unequipped VC-4 signal.
VC-4 Layer AP
The AI at this point is octet structured with an 125 μs frame (see figure 2). It represents adapted client
layer information comprising 2 340 bytes of client layer information, the signal label byte C2, and 2 bytes
F3 and H4 of client specific information combined with an 1 byte user channel F2. For the case the signal
has passed the trail protection sublayer, S4_AI has defined APS bits (1 to 4) in byte K3.
NOTE 2: Bits 1 to 4 of byte K3 will be undefined when the signal S4_AI has not been processed
in a trail protection connection function S4P_C.
NOTE 3: Bits 5 to 8 of byte K3 are reserved for future international standardization. Currently,
their values are undefined.
NOTE 4: Bytes F2 and F3 will be undefined when the adaptation functions sourcing these bytes
are not present in the network element.
NOTE 5: Byte H4 will be undefined when the VC-4 transports a 140 Mbit/s, an ATM signal, or a
Test Signal Structure (TSS1).
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ETS 300 417-4-1: June 1997
A VC-4 comprises one of the following payloads:
- a 139 264 kbit/s signal asynchronous mapped into a C-4;
- a TUG-structured signal;
- an ATM 149 760 kbit/s cell stream signal;
- a DQDB 149 888 kbit/s signal;
- a Test Signal Structure (TSS1).
Figure 1 shows that more than one adaptation function exists in the S4 layer that can be connected to one
S4 access point. For such case, 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 (TU) timeslot. Access to
the same (TU) 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
(e.g. cLOP) to be detected and reported. To
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