ETSI EN 300 417-2-1 V1.2.1 (2001-10)

Transmission and Multiplexing (TM); Generic requirements of transport functionality of equipment; Part 2-1: Synchronous Digital Hierarchy (SDH) and Plesiochronous Digital Hierarchy (PDH) physical section layer functions

REN/TM-01042-2-1

Prenos in multipleksiranje (TM) – Generične zahteve za prenosno funkcionalnost opreme – 2-1. del: Funkcije fizičnega odseka plasti za sinhrono digitalno hierarhijo (SDH) in pleziohrono digitalno hierarhijo (PDH)

General Information

• Status: Published
• Publication Date: 21-Oct-2001
• Technical Committee: TM 1 - TM Core networks, fibres and cables
• Current Stage: 12 - Completion
• Due Date: 29-Oct-2001
• Completion Date: 22-Oct-2001
• Ref Project: SIST EN 300 417-2-1 V1.2.1:2003 - Transmission and Multiplexing (TM); Generic requirements of transport functionality of equipment; Part 2-1: Synchronous Digital Hierarchy (SDH) and Plesiochronous Digital Hierarchy (PDH) physical section layer functions

Standards Content (Sample)

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 2-1: Synchronous Digital Hierarchy (SDH) and Plesiochronous Digital Hierarchy (PDH) physical section layer functions33.040.20Prenosni sistemTransmission systemsICS:Ta slovenski standard je istoveten z:EN 300 417-2-1 Version 1.2.1SIST EN 300 417-2-1 V1.2.1:2003en01-december-2003SIST EN 300 417-2-1 V1.2.1:2003SLOVENSKI
STANDARD
ETSI ETSI EN 300 417-2-1 V1.2.1 (2001-10)2
Reference REN/TM-01042-2-1 Keywords architecture, SDH, transmission, interface ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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© European Telecommunications Standards Institute 2001. All rights reserved.
ETSI ETSI EN 300 417-2-1 V1.2.1 (2001-10)3 Contents Intellectual Property Rights.6 Foreword.6 1 Scope.8 2 References.8 3 Definitions, abbreviations and symbols.9 3.1 Definitions.9 3.2 Abbreviations.9 3.3 Symbols and diagrammatic conventions.11 3.4 Introduction.12 4 STM-1 Optical Section Layer Functions.12 4.1 Optical Section Connection functions.13 4.2 Optical Section Trail Termination functions.13 4.2.1 Optical Section Trail Termination Source OS1-Xy.z_TT_So.13 4.2.2 Optical Section Trail Termination Sink OS1-Xy.z_TT_Sk.14 4.3 Optical Section Adaptation functions.15 4.3.1 Optical Section to Regenerator Section Adaptation Source OS1/RS1_A_So.15 4.3.2 Optical Section to Regenerator Section Adaptation Sink OS1/RS1_A_Sk.16 5 STM-4 Optical Section Layer Functions.18 5.1 Optical Section Connection functions.18 5.2 Optical Section Trail Termination functions.19 5.2.1 Optical Section Trail Termination Source OS4-Xy.z_TT_So.19 5.2.2 Optical Section Trail Termination Sink OS4-Xy.z_TT_Sk.20 5.3 Optical Section Adaptation functions.21 5.3.1 Optical Section to Regenerator Section Adaptation Source OS4/RS4_A_So.21 5.3.2 Optical Section to Regenerator Section Adaptation Sink OS4/RS4_A_Sk.22 6 STM-16 Optical Section Layer Functions.23 6.1 Optical Section Connection functions.24 6.2 Optical Section Trail Termination functions.24 6.2.1 Optical Section Trail Termination Source OS16-Xy.z_TT_So.24 6.2.2 Optical Section Trail Termination Sink OS16-Xy.z_TT_Sk.25 6.3 Optical Section Adaptation functions.26 6.3.1 Optical Section to Regenerator Section Adaptation Source OS16/RS16_A_So.26 6.3.2 Optical Section to Regenerator Section Adaptation Sink OS16/RS16_A_Sk.27 7 STM-64 Optical Section Layer Functions.28 7.1 Optical Section Connection functions.29 7.2 Optical Section Trail Termination functions.29 7.2.1 Optical Section Trail Termination Source OS64-Xy.z_TT_So.29 7.2.2 Optical Section Trail Termination Sink OS64-Xy.z_TT_Sk.30 7.3 Optical Section Adaptation functions.31 7.3.1 Optical Section to Regenerator Section Adaptation Source OS64/RS64_A_So.31 7.3.2 Optical Section to Regenerator Section Adaptation Sink OS64/RS64_A_Sk.32 8 STM-256 Optical Section Layer Functions.33 8.1 Optical Section Connection functions.34 8.2 Optical Section Trail Termination functions.34 8.2.1 Optical Section Trail Termination Source OS256-Xy.z_TT_So.34 8.2.2 Optical Section Trail Termination Sink OS256-Xy.z_TT_Sk.35 8.3 Optical Section Adaptation functions.36 8.3.1 Optical Section to Regenerator Section Adaptation Source OS256/RS256_A_So.36 8.3.2 Optical Section to Regenerator Section Adaptation Sink OS256/RS256_A_Sk.36 9 STM-1 Electrical Section Layer Functions.38 9.1 STM-1 Electrical Section Connection function ES1_C.38 SIST EN 300 417-2-1 V1.2.1:2003

ETSI ETSI EN 300 417-2-1 V1.2.1 (2001-10)4 9.2 STM-1 Electrical Section Trail Termination functions.39 9.2.1 STM-1 Electrical Section Trail Termination Source ES1_TT_So.39 9.2.2 STM-1 Electrical Section Trail Termination Sink ES1_TT_Sk.40 9.3 STM-1 Electrical Section Adaptation functions.41 9.3.1 STM-1 Electrical Section to Regenerator Section Adaptation Source ES1/RS1_A_So.41 9.3.2 STM-1 Electrical Section to Regenerator Section Adaptation Sink ES1/RS1_A_Sk.42 10 E4 Section Layer Functions.43 10.1 E4 Connection function E4_C.44 10.2 E4 Trail Termination functions.44 10.2.1 E4 Trail Termination Source E4_TT_So.44 10.2.2 E4 Trail Termination Sink E4_TT_Sk.45 10.3 E4 Adaptation functions.46 10.3.1 E4 to P4x Adaptation Source E4/P4x_A_So.46 10.3.2 E4 to P4x Adaptation Sink E4/P4x_A_Sk.47 10.3.3 E4 to P4e Adaptation Source E4/P4e_A_So.48 10.3.4 E4 to P4e Adaptation Sink E4/P4e_A_Sk.48 10.3.5 E4 to P4s Adaptation Source E4/P4s_A_So.50 10.3.6 E4 to P4s Adaptation Sink E4/P4s_A_Sk.51 11 E31 Section Layer Functions.53 11.1 E31 Connection function E31_C.54 11.2 E31 Trail Termination functions.54 11.2.1 E31 Trail Termination Source E31_TT_So.54 11.2.2 E31 Trail Termination Sink E31_TT_Sk.55 11.3 E31 Adaptation functions.56 11.3.1 E31 to P31x Adaptation Source E31/P31x_A_So.56 11.3.2 E31 to P31x Adaptation Sink E31/P31x_A_Sk.57 11.3.3 E31 to P31e Adaptation Source E31/P31e_A_So.58 11.3.4 E31 to P31e Adaptation Sink E31/P31e_A_Sk.58 11.3.5 E31 to P31s Adaptation Source E31/P31s_A_So.60 11.3.6 E31 to P31s Adaptation Sink E31/P31s_A_Sk.61 12 E22 Section Layer Functions.63 12.1 E22 Connection function E22_C.64 12.2 E22 Trail Termination functions.64 12.2.1 E22 Trail Termination Source E22_TT_So.64 12.2.2 E22 Trail Termination Sink E22_TT_Sk.65 12.3 E22 Adaptation functions.66 12.3.1 E22 to P22x Adaptation Source E22/P22x_A_So.66 12.3.2 E22 to P22x Adaptation Sink E22/P22x_A_Sk.67 12.3.3 E22 to P22e Adaptation Source E22/P22e_A_So.68 12.3.4 E22 to P22e Adaptation Sink E22/P22e_A_Sk.68 13 E12 Section Layer Functions.70 13.1 E12 Connection function E12_C.71 13.2 E12 Trail Termination functions.71 13.2.1 E12 Trail Termination Source E12-Z_TT_So.71 13.2.2 E12 Trail Termination Sink E12-Z_TT_Sk.73 13.3 E12 Adaptation functions.74 13.3.1 E12 to P12x Adaptation Source E12/P12x_A_So.74 13.3.2 E12 to P12x Adaptation Sink E12/P12x_A_Sk.75 13.3.3 E12 to P12s Adaptation Source E12/P12s_A_So.76 13.3.4 E12 to P12s Adaptation Sink E12/P12s_A_Sk.77 14 T12 Section Layer Functions.78 14.1 T12 Connection function T12_C.79 14.2 T12 Trail Termination functions.79 14.2.1 T12 Trail Termination Source T12-Z_TT_So.79 14.2.2 T12 Trail Termination Sink T12-Z_TT_Sk.80 14.3 T12 Adaptation functions.81 14.3.1 T12 to SD Adaptation Source T12/SD_A_So.81 14.3.2 T12 to SD Adaptation Sink T12/SD_A_Sk.81 SIST EN 300 417-2-1 V1.2.1:2003

ETSI ETSI EN 300 417-2-1 V1.2.1 (2001-10)5 15 E0 Section Layer Functions.81 15.1 E0 Connection function E0_C.81 15.2 E0 Trail Termination functions.82 15.2.1 E0 Trail Termination Source E0_TT_So.82 15.2.2 E0 Trail Termination Sink E0_TT_Sk.83 15.3 E0 Adaptation functions.84 15.3.1 E0 to P0s Adaptation Source E0/P0s_A_So.84 15.3.2 E0 to P0s Adaptation Sink E0/P0s_A_Sk.84 Annex A (informative): E32 Section Layer Functions.86 A.1 E32 Connection function E32_C.86 A.2 E32 Trail Termination functions.87 A.2.1 E32 Trail Termination Source E32_TT_So.87 A.2.2 E32 Trail Termination Sink E32_TT_Sk.88 A.3 E32 Adaptation functions.89 A.3.1 E32 to P32x Adaptation Source E32/P32x_A_So.89 A.3.2 E32 to P32x Adaptation Sink E32/P32x_A_Sk.90 Annex B (informative): E11 Section Layer Functions.91 B.1 E11 Connection function E11_C.91 B.2 E11 Trail Termination functions.92 B.2.1 E11 Trail Termination Source E11_TT_So.92 B.2.2 E11 Trail Termination Sink E11_TT_Sk.93 B.3 E11 Adaptation functions.94 B.3.1 E11 to P11x Adaptation Source E11/P11x-L_A_So.94 B.3.2 E11 to P11x Adaptation Sink E11/P11x-L_A_Sk.95 Annex C (informative): Bibliography.96 History.97
ETSI ETSI EN 300 417-2-1 V1.2.1 (2001-10)6 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 2, 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 EN 300 417. SIST EN 300 417-2-1 V1.2.1:2003

ETSI ETSI EN 300 417-2-1 V1.2.1 (2001-10)7 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 ETSI EN 300 417-2-1 V1.2.1 (2001-10)8 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 needs to be describable as an interconnection of a subset of these functional blocks contained within the present document. The interconnections of these blocks need to obey the combination rules given. The generic functionality is described in the EN 300 417-1-1 [8]. 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] ANSI T1.102: "Digital Hierarchy; Electrical Interfaces". [2] ANSI T1.107: "Digital Hierarchy; Formats Specifications". [3] ETSI EN 300 147: "Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH); Multiplexing structure". [4] 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". [5] ETSI EN 300 167: "Transmission and Multiplexing (TM); Functional characteristics of
2 048 kbit/s interfaces". [6] ITU-T Recommendation G.957 (1999): "Optical interfaces for equipments and systems relating to the synchronous digital hierarchy". NOTE: The former version of G.957 was modified and published under ETSI ETS 300 236 (1996). As no revision is ongoing, the ITU Reference is preferred. [7] 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". [8] ETSI EN 300 417-1-1: "Transmission and Multiplexing (TM); Generic requirements of transport functionality of equipment; Part 1-1: Generic processes and performance". [9] ETSI EN 300 417–6–1: "Transmission and Multiplexing (TM); Generic requirements of transport functionality of equipment; Part 6-1: Synchronization layer functions". [10] ITU-T Recommendation G.703: "Physical/electrical characteristics of hierarchical digital interfaces". [11] ITU-T Recommendation G.706: "Frame alignment and cyclic redundancy check (CRC) procedures relating to basic frame structures defined in Recommendation G.704". [12] ITU-T Recommendation G.742 (1988): "Second order digital multiplex equipment operating at 8 448 kbit/s and using positive justification". SIST EN 300 417-2-1 V1.2.1:2003

ETSI ETSI EN 300 417-2-1 V1.2.1 (2001-10)9 [13] 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". [14] ITU-T Recommendation G.775: "Loss of Signal (LOS), Alarm Indication Signal (AIS) and Remote Defect Indication (RDI) defect detection and clearance criteria for PDH signals". [15] ITU-T Recommendation G.823: "The control of jitter and wander within digital networks which are based on the 2 048 kbit/s hierarchy". [16] ITU-T Recommendation G.825: "The control of jitter and wander within digital networks which are based on the synchronous digital hierarchy (SDH)". [17] Void. [18] ITU-T Recommendation G.691: "Optical interfaces for single-channel SDH systems with Optical Amplifiers, and STM-64 systems". [19] ETSI ETS 300 232: "Transmission and Multiplexing (TM); Optical interfaces for equipments and systems relating to the Synchronous Digital Hierarchy [ITU-T Recommendation G.957 (1993), modified]". 3 Definitions, abbreviations and symbols 3.1 Definitions The functional definitions are described in EN 300 417-1-1 [8]. 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: A Adaptation function AI Adapted Information AIS Alarm Indication Signal ALS Automatic Laser Shutdown ANSI American National Standards Institute AP Access Point ATM Asynchronous Transfer Mode AU Administrative Unit BBE Background Block Error BER Bit Error Rate BFA Basic Frame Alignment BIP Bit Interleaved Parity C Connection function CH CHannel CI Characteristic Information CID Consecutive Identical Digits CK ClocK CM Connection Matrix CMI Coded Mark Inversion Co Connection CP Connection Point CRC Cyclic Redundancy Check D Data DEC DECrement DEG DEGraded DL Data Link E0 Electrical interface signal 64 kbit/s SIST EN 300 417-2-1 V1.2.1:2003

ETSI ETSI EN 300 417-2-1 V1.2.1 (2001-10)10 E11 Electrical interface signal 1 544 kbit/s E12 Electrical interface signal 2 048 kbit/s E22 Electrical interface signal 8 448 kbit/s E31 Electrical interface signal 34 368 kbit/s E32 Electrical interface signal 44 736 kbit/s E4 Electrical interface signal 139 264 kbit/s EBC Errored Block Count ECC Embedded Communications Channel EDC Error Detection Code EQ EQuipment ES Electrical Section ES Errored Second ESR Errored Seconds Rate Ex ITU-T Recommendation G.703 [10] type electrical signal, bit rate order x F_B Far-end Block F_SES Far-end Severely Errored Second FAS Frame Alignment Signal FO Frame Offset information FS Frame Start signal HDB3 High Density Bipolar of order 3 HO Higher Order ID IDentifier IF In Frame state INC INCrement IS Intermediate System ITU-T International Telecommunications Union - Telecommunications Sector LC Link Connection LO Lower Order LOF Loss Of Frame LOM Loss Of Multiframe LOP Loss Of Pointer LOS Loss Of Signal LOT Loss of Octet Timing LT Line Termination MC Matrix Connection MFP MultiFrame Present MI Management Information MO Managed Object MON MONitored MS Multiplex Section MS1 STM-1 Multiplex Section MSP Multiplex Section Protection N_B Near-end Block N_SES Near-end Severely Errored Second NC Network Connection NCI No CRC-4 to CRC-4 Interworking NE Network Element NNI Network Node Interface NRZ Non-Return to Zero NU National Use (bits, bytes) OOF Out Of Frame state OS Optical Section OW Order Wire P Protection 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 [5] 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 SIST EN 300 417-2-1 V1.2.1:2003

ETSI ETSI EN 300 417-2-1 V1.2.1 (2001-10)11 P31s 34 368 kbit/s PDH path layer with synchronous 125 µs frame structure according to ETS 300 337 [7] 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 [7] P4x 139 264 kbit/s layer (transparent) PDH Plesiochronous Digital Hierarchy PS Protection Switching RI Remote Information RLT Regenerated Line Termination RS Regenerator Section RS1 STM-1 Regenerator Section RS16 STM-16 Regenerator Section RS4 STM-4 Regenerator Section S2 VC-2 path layer S3 VC-3 path layer S4 VC-4 path layer SD Synchronization Distribution layer, Signal Degrade SDH Synchronous Digital Hierarchy SES Severely Errored Second SF Signal Fail SHR Self Healing Ring Sk Sink SNC Sub-Network Connection So Source SOH Section OverHead SSF Server Signal Fail STM Synchronous Transport Module STM-N Synchronous Transport Module, level N T12 2 048 kHz signal TD Transmit Degrade TF Transmit Fail TG Timing Generator TI Timing Information TM Transmission_Medium TP Timing Point TR Threshold Report TS Time Slot TSF Trail Signal Fail TT Trail Termination function TU Tributary Unit TUG Tributary Unit Group UAT UnAvailable Time UAT_cmd UnAvailable Time command UI Unit Interval UNI User to Network Interface VC Virtual Container W Working 3.3 Symbols and diagrammatic conventions The symbols and diagrammatic conventions are described in EN 300 417-1-1 [8]. SIST EN 300 417-2-1 V1.2.1:2003

ETSI ETSI EN 300 417-2-1 V1.2.1 (2001-10)12 3.4 Introduction The atomic functions defining the physical interface section layers are described below. They describe the physical and logical characteristics of the optical and electrical interfaces used in SDH equipments also with their adaptation functionality of PDH multiplex equipments described in the CCITT Recommendations G.751 [13] and G.742 [12] for signal hierarchies P4, P31 and P22, and adaptation functionality for SDH over PDH specified by ETS 300 337 [7] for signal hierarchies P4s and P31s and EN 300 167 [5] for P12s layer signals. The physical interface layers are defined for each of the synchronous and plesiochronous rates as defined in EN 300 147 [3] and EN 300 166 [4]. References to the signal structure are mentioned in the appropriate text clauses. 4 STM-1 Optical Section Layer Functions OS1-Xy.zOS1/RS1RS1_CIOS1_AIOS1_CIOS1-Xy.zOS1/RS1OS1_AIRS1_CIOS1_CIOS1OS1_CIOS1_CI NOTE: Xy.z will be one value out of the set: {I1, S1.1, S1.2, L1.1, L1.2, L1.3}.
Figure 1: STM-1 Optical Section atomic functions SIST EN 300 417-2-1 V1.2.1:2003

ETSI ETSI EN 300 417-2-1 V1.2.1 (2001-10)13 STM-1 Optical Section Layer CP Characteristic Information OS1_CI of the optical layer CP (see figure 2) is a digital, optical signal of defined power, bit rate, pulse width and wavelength. A range of such characteristic signals for different optical power budgets is defined in ETS 300 232 [19].
1 2 3 4 5 6 7 8 9 10 . 270 1 A1 A1 A1 A2 A2 A2
scrambled STM-1 bytes
Figure 2: OS1 characteristic information OS1_CI (optical) and adapted information OS1_AI (electrical) STM-1 Optical Section Layer AP The information passing across the OS1 AP takes the form of a scrambled, digital bitstream (including a block frame character at 125 µs intervals) with co-directional bit timing (see figure 2). Frame characters and the synchronous, scrambling polynomial are defined in EN 300 147 [3]. 4.1 Optical Section Connection functions For further study. 4.2 Optical Section Trail Termination functions 4.2.1 Optical Section Trail Termination Source OS1-Xy.z_TT_So NOTE: Xy.z will be one value out of the set: {I1, S1.1, S1.2, L1.1, L1.2, L1.3}. SIST EN 300 417-2-1 V1.2.1:2003

ETSI ETSI EN 300 417-2-1 V1.2.1 (2001-10)14 Symbol: OS1-Xy.zOS1_AIOS1_CIOS1_TT_So_MIX: I,S,Ly: 1z: 1,2,3 Figure 3: OS1-Xy.z_TT_So symbol Interfaces: Table 1: OS1-Xy.z_TT_So input and output signals Input(s) Output(s) OS1_AI_D OS1_CI_D
Processes: This function forms the optical STM-1 signal for transmission over the optical cable as defined in ETS 300 232 [19]. Optical characteristics: The function shall generate an optical STM-1 signal that meets the Xy.z characteristics defined in ETS 300 232 [19]. Defects:
None. Consequent Actions: None. Defect Correlations:
None. Performance Monitoring:
None. 4.2.2 Optical Section Trail Termination Sink OS1-Xy.z_TT_Sk NOTE 1: Xy.z will be one value out of the set: {I1, S1.1, S1.2, L1.1, L1.2, L1.3}. Symbol: OS1-Xy.zOS1_AIOS1_CIOS1_TT_Sk_MIX: I,S,Ly: 1z: 1,2,3 Figure 4: OS1-Xy.z_TT_Sk symbol SIST EN 300 417-2-1 V1.2.1:2003

ETSI ETSI EN 300 417-2-1 V1.2.1 (2001-10)15 Interfaces: Table 2: OS1-Xy.z_TT_Sk input and output signals Input(s) Output(s) OS1_CI_D
OS1_TT_Sk_MI_PortMode OS1_AI_D OS1_AI_TSF OS1_TT_Sk_MI_cLOS
Processes: This function recovers the optical STM-1 signal transmitted over the optical cables. The physical characteristics of the interface signal are defined in ETS 300 232 [19]. The function shall convert the received STM-1 signal, normally complying to the Xy.z characteristics defined in ETS 300 232 [19], into the internal OS1_AI signal. Port Mode: The function shall have a port mode as specified by clause 8.5 of EN 300 417-1-1 [8]. NOTE 2: The AUTO state of the port mode process is optional. Defects: The function shall detect Loss Of Signal defect (dLOS) according the optical STM-1 dLOS specification in clause 8.2.1.6 of EN 300 417-1-1 [8]. Consequent Actions: aTSF ← dLOS. Defect Correlations: cLOS ← MON and dLOS. Performance Monitoring: None. 4.3 Optical Section Adaptation functions 4.3.1 Optical Section to Regenerator Section Adaptation Source OS1/RS1_A_So Symbol: OS1/RS1RS1_CIOS1_AI Figure 5: OS1/RS1_A_So symbol SIST EN 300 417-2-1 V1.2.1:2003

ETSI ETSI EN 300 417-2-1 V1.2.1 (2001-10)16 Interfaces: Table 3: OS1/RS1_A_So input and output signals Input(s) Output(s) RS1_CI_D RS1_CI_CK OS1_AI_D
Processes: None. The function shall not add any jitter. NOTE: Jitter at the NNI is the combination of the jitter generated and transferred via the client layers. Defects: None. Consequent Actions: None. Defect Correlations: None. Performance Monitoring: None. 4.3.2 Optical Section to Regenerator Section Adaptation Sink OS1/RS1_A_Sk Symbol: OS1/RS1RS1_CIOS1_AIOS1/RS1_A_Sk_MI Figure 6: OS1/RS1_A_Sk symbol Interfaces: Table 4: OS1/RS1_A_Sk input and output signals Input(s) Output(s) OS1_AI_D OS1_AI_TSF
RS1_CI_D RS1_CI_CK RS1_CI_FS RS1_CI_SSF OS1/RS1_A_Sk_MI_cLOF
Processes: This function regenerates the received signal, recovers bit timing (CK) and Frame Start reference (FS) from the received signal. SIST EN 300 417-2-1 V1.2.1:2003

ETSI ETSI EN 300 417-2-1 V1.2.1 (2001-10)17 Regeneration: The function shall operate with a maximum BER as specified in EN 300 417-1-1 [8], clause 11.3.2.1 when any combination of the following signal conditions exist at the input: - any input optical power level within the range specified in ETS 300 232 [19]; - jitter modulation applied to the input signal as specified in EN 300 417-1-1 [8], clause 11.3.2.1; - the input signal bit rate has any value in the range 155 520 kbit/s ± 20 ppm. NOTE: The frequency and jitter / wander tolerance might be further constrained by the requirements of the client layers. To ensure adequate immunity against the presence of Consecutive Identical Digits (CID) in the STM-1 signal, the function shall comply with the specification in EN 300 417-1-1 [8], clause 11.3.2.4. The function shall process the signal such that in the absence of input jitter, the intrinsic jitter at the STM-1 output interface (in a regenerative repeater) shall not exceed: - 0,3 UI peak-to-peak when measured through a bandpass filter with corner frequencies at 500 Hz and 1,3 MHz and low pass roll off of 60 dB / decade and high pass roll off of 20 dB / decade; - 0,1 UI peak-to-peak when measured through a bandpass filter with corner frequencies at 65 kHz and 1,3 MHz and low pass roll off of 60 dB / decade and high pass roll off of 20 dB / decade. NOTE: 1 UI = 6,43 ns The function shall process the signal such that the jitter transfer (measured between an STM-1 input and STM-1 output in a regenerative repeater) shall be as specified in clause 11.3.3.1 of EN 300 417-1-1 [8]. Frame alignment: The frame alignment shall be performed as specified in clause 8.2.1.8 of EN 300 417-1-1 [8]. Defects: The function shall detect for dLOF according the specification in clause 8.2.1.8 of EN 300 417-1-1 [8]. Consequent Actions: aAIS ← dLOF or AI_TSF; aSSF ← dLOF or AI_TSF. On declaration of an aAIS the function shall output an all-ONEs (AIS) signal - complying to the frequency limits for this interface - within 250 µs; on clearing of aAIS the function shall output normal data within 250 µs. Defect Correlations: cLOF ← dLOF and (not AI_TSF). Performance Monitoring:
None. SIST EN 300 417-2-1 V1.2.1:2003

ETSI ETSI EN 300 417-2-1 V1.2.1 (2001-10)18 5 STM-4 Optical Section Layer Functions NOTE: Xy.z will be one value out of the set: {I4, S4.1, S4.2, L4.1, L4.2, L4.3}. OS4-Xy.zOS4/RS4RS4_CIOS4_AIOS4_CIOS4-Xy.zOS4/RS4OS1_AIRS4_CIOS4_CIOS4OS4_CIOS4_CI Figure 7: STM-4 Optical Section atomic functions STM-4 Optical Section Layer CP Characteristic Information OS4_CI of the optical layer CP (see figure 8) is a digital, optical signal of defined power, bit rate, pulse width and wavelength. A range of such characteristic signals for different optical power budgets is defined in ETS 300 232 [19]. 123456789123456789101112131415161718192021222324252627282930313233343536371080scrambled STM-4 bytesA1A1A1A1A1A1A1A1A1A1A1A1A2A2A2A2A2A2A2A2A2A2A2A2 Figure 8: OS4 characteristic information OS4_CI (optical) and adapted information OS4_AI (electrical) STM-4 Optical Section Layer AP The information passing across the OS4 AP takes the form of a scrambled, digital bitstream (including a block frame character at 125 µs intervals) with co-directional bit timing (see figure 8). Frame characters and the synchronous, scrambling polynomial are defined in EN 300 147 [3]. 5.1 Optical Section Connection functions For further study. SIST EN 300 417-2-1 V1.2.1:2003

ETSI ETSI EN 300 417-2-1 V1.2.1 (2001-10)19 5.2 Optical Section Trail Termination functions 5.2.1 Optical Section Trail Termination Source OS4-Xy.z_TT_So NOTE: Xy.z will be one value out of the set: {I4, S4.1, S4.2, L4.1, L4.2, L4.3}. Symbol: OS4-Xy.zOS4_AIOS4_CIOS4_TT_So_MIX: I,S,Ly: 4z: 1,2,3 Figure 9: OS4-Xy.z_TT_So symbol Interfaces: Table 5: OS4-Xy.z_TT_So input and output signals Input(s) Output(s) OS4_AI_D OS4_CI_D
Processes:
This function forms the optical STM-4 signal for transmission over the optical cable as defined in ETS 300 232 [19]. Optical characteristics: The function shall generate an optical STM-4 signal that meets the Xy.z characteristics defined in ETS 300 232 [19]. Defects:
None. Consequent Actions: None. Defect Correlations:
None. Performance Monitoring:
None. SIST EN 300 417-2-1 V1.2.1:2003

ETSI ETSI EN 300 417-2-1 V1.2.1 (2001-10)20 5.2.2 Optical Section Trail Termination Sink OS4-Xy.z_TT_Sk NOTE 1: Xy.z will be one value out of the set: {I4, S4.1, S4.2, L4.1, L4.2, L4.3}. Symbol: 123456789123456789101112131415161718192021222324252627282930313233343536371080scrambled STM-4 bytesA1A1A1A1A1A1A1A1A1A1A1A1A2A2A2A2A2A2A2A2A2A2A2A2 Figure 10: OS4-Xy.z_TT_Sk symbol Interfaces: Table 6: OS4-Xy.z_TT_Sk input and output signals Input(s) Output(s) OS4_CI_D
OS4_TT_Sk_MI_PortMode OS4_AI_D OS4_AI_TSF OS4_TT_Sk_MI_cLOS
Processes: This function recovers the optical STM-4 signal transmitted over the optical cables. The physical characteristics of the interface signal are defined in ETS 300 232 [19]. The function shall convert the received STM-4 signal, normally complying to the Xy.z characteristics defined in ETS 300 232 [19], into the internal OS4_AI signal. Port Mode: The function shall have a port mode as s
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