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Optical Transport Network & Optical Transport Module "Digital Wrapper" Maarten Vissers Consulting Member of Technical Staff Lucent Technologies email:

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Presentation on theme: "Optical Transport Network & Optical Transport Module "Digital Wrapper" Maarten Vissers Consulting Member of Technical Staff Lucent Technologies email:"— Presentation transcript:

1 Optical Transport Network & Optical Transport Module "Digital Wrapper" Maarten Vissers Consulting Member of Technical Staff Lucent Technologies April 2002

2 2 Contents OTN Rationale OTN Layer Networks Multi level Connection Monitoring OTM Signals Maintenance Signals Mapping Client Signals Multiplexing Virtual Concatenation OTN Standards

3 3 April 2002 Contents OTN Rationale OTN Layer Networks Multi level Connection Monitoring OTM Signals Maintenance Signals Mapping Client Signals Multiplexing Virtual Concatenation OTN Standards OTN Characteristics Transitional Approaches Final Phase O/E/O processing objectives Digital processing objectives

4 4 April 2002 OTN Characteristics New transport networking layer (carrier grade solution) Next step (after SDH/SONET) to support ever growing data driven needs for bandwidth and emergence of new broadband services –Terrabit/second per fiber via DWDM lines (transport level) –Gigabit/second paths at 2.5 Gb/s, 10 Gb/s, 40 Gb/s (networking level) Service transparency for SDH/SONET, ETHERNET, ATM, IP, MPLS –No change of SDH/SONET! –One exception; interpretation of STM-LOF alarm  + STM- AIS due to OTN fail Enhanced OAM & networking functionality for all services Shortest physical layer stack for data services (IP  OTN  Fiber)

5 5 April 2002 OTN Characteristics Gigabit level bandwidth granularity required to scale and manage multi-Terabit networks Wavelength level switching maximizes nodal switching capacity, the gating factor for reconfigurable network capacity Avoids very large numbers of fine granularity pipes that stress network planning, administration, survivability, and management

6 6 April 2002 Transitional Approaches - Assessment Extended SDH (attempt at creating a new layer using SDH elements) Bandwidth multiplication by means of TDM  more Gigabit/s on fiber (4x) Proprietary approaches attempting to carry lower rate STM-N [including all overhead] as a “service” within a higher rate STM-M (M>N) –strongly limited: SDH multiplexing hierarchy not designed to carry the STM-N (i.e. “itself”) as a service  No timing transparency  90% of STM-N/OC-N overhead bytes not passed through  No STM-N/OC-N independent monitoring –Multiple proprietary implementations created in industry  no interworking

7 7 April 2002 Transitional Approaches - Assessment Pre-OTN WDM (simple transport - vs. networking - solution) Bandwidth multiplication by means of WDM  Terabit/s on fiber (100x) Client signal (e.g. STM-N, GbE) direct on wavelength –simple transport, no monitoring –or client specific non-intrusive monitoring  per client type a monitor is needed  additional client type implies additional monitor to be added –alarm suppression signal (e.g. AIS) specific per client type  additional client type implies additional alarm suppression signal to be added Point-to-point application that can transport STM-N/OC-N as a service

8 8 April 2002 Final Phase OTN (networking solution) Management enabler of WDM network by means of addition of: –Overhead to " " and "multi- " signals  "non-associated" or "out-of-channel" overhead; e.g. preventing alarm storms –Optical Channel (OCh) layer  STM-N, IP, ATM and Ethernet signals mapped ("wrapped") into OCh frame (OCh Data Unit (ODUk)) First transmission technology in which each stakeholder gets its own (ODUk) connection monitoring In addition ODUk supports/provides: –STM-N independent monitoring, becoming a service signal "itself", shortest physical layer stack for data services, TDM muxing, STM- N inverse multiplexing, client independent protection switching, plesiochronous timing (no sync network required)

9 9 April 2002 O/E/O Objectives Minimise O/E/O processing in OTN O/E/O processing at edges of administrative/vendor (sub)domains –Span engineering O/E/O processing at edges of protected or switched domain –Span engineering (short/long route effects) –Signal Fail & Signal Degrade condition determination  If more than 1 optical transparent subnetwork is included O/E/O processing at intermediate points –Span engineering (long line sections) –Losses in optical fabrics O/E & E/O processing around electrical fabric

10 10 April 2002 Digital Processing Objectives Digital processing at locations where O/E/O is already performed Fault and degradation detection Service Level Agreement (SLA) verification Signal Fail & Signal Degrade condition determination for protection and restoration (e.g. if high accuracy is required)

11 11 April 2002 Contents OTN Rationale OTN Layer Networks Multi level Connection Monitoring OTM Signals Maintenance Signals Mapping Client Signals Multiplexing Virtual Concatenation OTN Standards Layer Networks Client Signals Optical Channel Structure Containment Relationships Example of Layer Network Trails OTN Interfaces Standardised and "Proprietary" Stacks

12 12 April 2002 OTN Layer Networks & Client Signals Three new layer networks: one "Gbit/s" path layer –OCh two section layers –OMSn –OTSn single channel section layer: –OPS0 Client signals: IP/MPLS ATM Ethernet STM-N Optical Multiplex Section (OMSn) layer network Optical Transmission Section (OTSn) layer network Optical Transport Module of order n (OTM-n, n  1) IP/MPLSATM ETHERNETSTM-N OTM Physical Section (OPSn) OTM-0 OTM-nr, n>1 STM-N GbE Interworking with pre-OTN Optical Channel (OCh) layer network

13 13 April 2002 Optical Channel Structure Optical Channel layer network consists of 3+1 structures: Digital: –OCh Data Unit (ODUk) –OCh Payload Unit (OPUk, k=1,2,3) –OCh Transport Unit (OTUk, OTUkV) Analogue: OCh Optical Channel Data Unit (ODUk) OPUm (m>k) ODUm (m>k) ODUk CF TDM Multiplexing (TDM) ODUk multiplexing ODUk virtual concatenation CF: Connection Function Optical Channel Transport Unit (OTUk, OTUkV) Optical Channel (OCh) OCh CF STM-N GbE IP ATM ETHERNETSTM-N Optical Channel Payload Unit (OPUk)

14 14 April 2002 Optical Transport Module OPSn OTUk Optical Channel (OCh) Optical Channel Carrier (OCC) OCC Client ODUkFECOH OCh Transport Unit (OTUk) OPUk OH OCh Data Unit (ODUk) ClientOH OCh Payload Unit (OPUk) Wrapper Associated overhead OTN Containment Relationships OPS0 Optical Physical Section OTM Overhead Signal Optical Supervisory Channel OSC OOS OSC OH Non-associated overhead OMSn OTSn Optical Multiplex Section Optical Transmission Section

15 15 April 2002 OTN Layer Network Trails Example of OTSn, OMSn, OCh, OTUk, ODUk, OPS0 trails Transport of STM-N signal via OTM-0, OTM-n and STM-N lines DXC 3R OTSn OMSn STM-N ODUk Client 3R DXC OPS0OSn OTM-0 OTM-n STM-N ODXC OCADMLTRR LT Line Terminal w/ optical channel multiplexing OCADM Optical Channel Add/Drop Multiplexer ODXC ODU Cross-Connect 3R O/E/O w/ Reamplification, Reshaping & Retiming and monitoring R Repeater OCh, OTUk k OCh, OTUk

16 16 April 2002 OTN Interfaces User to Network Interface (UNI) Network Node Interface (NNI) Inter Domain Interface (IrDI) Intra Domain Interface (IaDI)  between equipment of different vendors (IrVI)  within subnetwork of one vendor (IaVI) OTM UNI OTM NNI IaDI-IrVI OTM NNI IaDI-IaVI OTM NNI IaDI-IaVI Network Operator B Vendor XVendor Y OTM NNI IrDI Network Operator C USER A

17 17 April 2002 OMSn OTSn OTM-n.m Full functionality OCh OTUkV used within OTN transparent subnetworks; implementations are very much technology dependent OTUk ODUk Clients (e.g. STM-N, ATM, IP, Ethernet) OPUk ODUkP ODUkT OPSn OTM-0.m OTM-nr.m Reduced functionality OChr OCh substructure OTUk used between (and within) OTN transparent subnetworks Standardised & "Proprietary" stacks Proprietary elements: OTM-n.m optical parameters number of wavelengths bit rates of wavelengths supervisory channel OTUkV FEC frame format ODUk mapping

18 18 April 2002 Contents OTN Rationale OTN Layer Networks Multi level Connection Monitoring OTM Signals Maintenance Signals Mapping Client Signals Multiplexing Virtual Concatenation OTN Standards Application Nesting Overlapping

19 19 April 2002 Multi-level Connection Monitoring: Applications NO A NO B NO C USR1 USR2 ODUk Path CM Verify QoS CM UNI-UNI CM NNI-NNI CM Working Protection W/P CM Client Signal Client Signal QoS of client signal transport is monitored by UserQoS of provided leased circuit is monitored by Service ProviderQoS of provided leased circuit is monitored by Network OperatorQoS provided by leased circuit is monitored by User Status of working [protection] connection is monitored for SF and SD switch conditions ODUk switched circuit: UNI-UNI CM to initiate "connection re-establishment"

20 20 April 2002 Multi-level Connection Monitoring: Nesting

21 21 April 2002 Multi-level Connection Monitoring: Nesting and Overlapping

22 22 April 2002 Contents OTN Rationale OTN Layer Networks Multi level Connection Monitoring OTM Signals Maintenance Signals Mapping Client Signals Multiplexing Virtual Concatenation OTN Standards OTM Interface Signals OTM-16r.m OTM-0.m OTM-n.m OTM Signals versus OTN I/F OTM Overhead Signal Frame Formats OTUk, ODUk Overhead OTUk, ODUk OTUkV Overhead versus OTN I/F

23 23 April 2002 OTM-16r.m Signal (m=1,2,3,12,23,123) Up to 16 wavelengths carrying traffic, with fixed 200 GHz grid independent of bit rate (2G5, 10G, 40G) Optical parameters according to ITU-T Recommendation G Bit rate and format of the associated overhead according to ITU-T Recommendation G.709 No Optical Supervisory Channel (OSC) non-associated overhead not required; i.e. 3R points at each end, no repeaters

24 24 April 2002 OTM-0.m Signal (m=1,2,3) Single channel signal ("colourless": 1310 or 1550 nm) Optical parameters according to ITU-T Recommendation G Bit rate and format of the associated overhead according to ITU- T Recommendation G.709 No Optical Supervisory Channel (OSC) non-associated overhead not required; i.e. 3R points at each end, no repeaters

25 25 April 2002 OTM-n.m Signal (m=1,2,3,12,23,123) Up to "n" wavelengths carrying traffic, with a grid dependent on bit rate 1 "out-of-band" Optical Supervisory Channel (OSC) transporting the OTM Overhead Signal (OOS) OTM Overhead Signal transports OTS, OMS, OCh (non- associated) overhead and General management communications 3

26 26 April 2002 OTM Signals versus OTN Interfaces

27 27 April 2002 OTM Overhead Signal (OOS) «Non-associated overhead» BDI: Backward Defect Indication FDI-O: Forward Defect Indication - Overhead FDI-P: Forward Defect Indication - Payload OCI: Open Connection Indication PMI: Payload Missing Indication TTI: Trail Trace Identifier OOS functions subject to standardization OOS bit rate & format not standardized Non-Associated overhead OTSn n 3 2 OCh 1 General Management Communications Vendor Specific OMSn FDI-O FDI-P OCI OCh OH extensions may be expected in future to support e.g. OCh protection (e.g. OCh SPring) BDI-O BDI-P PMI FDI-P FDI-O BDI-O BDI-P PMI TTI

28 28 April 2002 OTUk and ODUk frame formats (k=1,2,3) OPU k Payload OPUk OH OPUk - Optical Channel Payload Unit ODUk ODUk - Optical Channel Data Unit Client Signal mapped in OPUk Payload Client Signal OTUk FEC OTUk OH OTUk - Optical Channel Transport Unit Alignm Alignment k indicates the order: 1 2.5G 2 10G 3 40G OTUk bit rate: 255/( 239 -k) * "STM-N" ODUk bit rate: 239/(239-k) * "STM-N"

29 29 April 2002 OTUk and ODUk Overhead (k=1,2,3) «Associated overhead» Alignm OPU k Payload OPUk OH ODUk OTUk OH PSI EXP TCM ACT TCM5TCM4 TCM3TCM2TCM1 TCM6GCC1GCC2 FTFL PM RES APS/PCCSMRESGCC0FAS MFAS Mapping & Concat Specific Mapping & Concat Specific PT TTIBIP PM BEI BDI STAT TCMi STATTTIBIP BEI/BIAE BDI MFAS: MultiFrame Alignment Signal PCC: Protection Communication Control channel PM: Path Monitoring PSI: Payload Structure Identifier RES: Reserved for future international standardisation SM: Section Monitoring TCM: Tandem Connection Monitoring ACT: Activation/deactivation control channel APS: Automatic Protection Swiching coordination channel EXP: Experimental FAS: Frame Alignment Signal FTFL: Fault Type & Fault Location reporting channel GCC: General Communication Channel

30 30 April 2002 OTUkV (k=1,2,3) Frame format is vendor specific Forward Error Correction code is vendor specific Minimum overhead set to support is: Trail Trace Identifier Error Detection Code (e.g. BIP) Backward Defect Indicator Backward Error Indicator (Backward) Incoming Alignment Error Other overhead is vendor specific ODUk mapping into OTUkV is vendor specific

31 31 April 2002 Overhead versus OTN Interfaces OTM Interface Ports on IP Router, ATM Switch, Ethernet Switch and SDH equipment should support the following minimum set of overhead OPUk Client Specific OPUk Payload Structure Identifier (PSI) ODUk Path Monitoring (PM) OTUk Section Monitoring (SM) Frame Alignment (FAS, MFAS)

32 32 April 2002 Overhead versus OTN Interfaces Overhead passed through network OTM UNI to OTM UNI OTM NNI IrDI to OTM NNI IrDI

33 33 April 2002 Overhead versus OTN Interfaces Overhead passed through network from OTM UNI to OTM UNI interface OPUk PSI, Client Specific ODUk PM, TCM ACT, TCM1..TCMn, TCM ACT, RES ODUk GCC1, GCC2 according contract ODUk APS/PCC definition is under study

34 34 April 2002 Overhead versus OTN Interfaces Overhead passed through network from OTM NNI IrDI to OTM NNI IrDI interface OPUk PSI, Client Specific ODUk PM, TCM ACT, TCM1..TCMm, TCM ACT, FTFL, RES –"m" in TCMm > "n" in TCMn (UNI-UNI) ODUk GCC1, GCC2 according contract ODUk APS/PCC definition is under study

35 35 April 2002 Contents OTN Rationale OTN Layer Networks Multi level Connection Monitoring OTM Signals Maintenance Signals Mapping Client Signals Multiplexing Virtual Concatenation OTN Standards Forward Defect Indication (FDI, AIS) Backward Defect & Error Indication (BDI, BEI) Open Connection Indication (OCI) Locked (LCK) Fault Type & Fault Location (FTFL)

36 36 April 2002 OTN Maintenance Signals: Alarm Suppression R R R 1000 /fiber x 96 fibers/cable x 5 cables/duct = 500k lost signals ==> 500k LOS alarms in network OMS-FDI use of OTN maintenance signals FDI, AIS and PMI will reduce number of alarms from 500k to 1 per broken fiber 3R at 3R point OCh-FDI is converted into ODUk-AIS OTS-PMI use of OTN maintenance signal OTS-PMI (and OMS-PMI) will prevent OTS [OMS] LOS alarm when none of s is present OCh-FDI at line termination point OMS-FDI is converted into OCH-FDI

37 37 April 2002 OTN Maintenance Signals: Alarm Suppression (FDI, AIS) AIS/FDI at clients AIS at ODUk AIS at OTUk FDI at OCh FDI/PMI at OMSn PMI at OTSn

38 38 April 2002 OTN Maintenance Signals: Alarm Suppression (FDI, AIS) Generated at egress of OMSn, OCh and ODUk Link Connections Inserted on detection of Signal Fail OMSn-FDI and OCh-FDI is non-associated overhead ODUk-AIS is special ODUk signal pattern (0xFF)

39 39 April 2002 Generic-AIS [STM-AIS] New maintenance STM-N level a continuous repeating 2047-bit PN-11 (1 + x 9 + x 11 ) sequence Generated in OTN tributary ports ingress trib: on detection of STM-N LOS egress trib: on detection of ODUk signal fail type defect To be detected in SDH line/trib ports in addition to STM-LOF as "STM-AIS"  In existing equipment detected as STM-LOF  detection insertion

40 40 April 2002 OTN Maintenance Signals: Backward Information (BDI, BEI) RDI/REI at Clients BDI/BEI at ODUk OTUk No BI at OCh BDI at OTSn OMSn

41 41 April 2002 OTN Maintenance Signals: Open Connection Indication (OCI) Generated in a Fabric Inserted when output port is not connected to input port OCh-OCI is non-associated overhead ODUk-OCI special ODUk signal pattern (0x66)

42 42 April 2002 OTN Maintenance Signals: Locked (LCK) Generated in ODUk Tandem Connection endpoint Inserted when Administrative State is Locked to block a user to access the connection to prevent test patterns within the network entering a user domain ODUk-LCK special ODUk signal pattern (0x55)

43 43 April 2002 Fault Type & Fault Location (FTFL) Helps Service Provider to automatically locate fault/degradation to specific Network Operator domain No need to call around any longer Section and Tandem Connection endpoints insert FTFL in forward direction on detection of SF or SD condition Specific FTFL function at UNI extracts forward info and sends it in opposite direction as backward info filters outgoing and incoming FTFL information (security issue) Specific FTFL extraction function reads FTFL forward and backward information at intermediate point along connection

44 44 April 2002 Contents OTN Rationale OTN Layer Networks Multi level Connection Monitoring OTM Signals Maintenance Signals Mapping Client Signals Multiplexing Virtual Concatenation OTN Standards CBR (e.g. STM-N) IP, ETHERNET ATM Test Signals Bit stream with/without octet timing Bit Rate Agnostic CBR

45 45 April 2002 Mapping STM-N (N=16,64,256) G.709 provides two mappings for STM-N signals bit synchronous asynchronous G.709 defines interworking between both mappings common demapper, and bit synchronous mapping has fixed Justification Control (JC) STM-16 STM-64 STM-256 D: Data, FS: Fixed Stuff, JC: Justification Control, N/PJO: Negative/Positive Justification Opportunity

46 46 April 2002 Mapping IP and Ethernet G.709 provides an encapsulation for packet based client signals There is no need for SDH or 10G-Ethernet to encapsulate IP A new protocol is being defined: Generic Framing Procedure a generic mechanism to carry any packet signal over fixed rate channels (e.g. SDH, SONET and OTN's ODUk) - ITU-T Rec. G.gfp Bandwidth for GFP stream in ODU1: kbit/s ODU2: kbit/s ODU3: kbit/s

47 47 April 2002 Generic Framing Procedure G.7041

48 48 April 2002 Mapping ATM G.709 provides a mapping for cell based client signals Mapping ATM into ODUk is similar to mapping into SDH Bandwidth for ATM stream in ODU1: kbit/s ODU2: kbit/s ODU3: kbit/s

49 49 April 2002 Mapping Test Signals G.709 provides a mapping for test signals Two test signals are defined NULL sequence (all-0's)

50 50 April 2002 Mapping Test Signals Two test signals are defined (continued) bit Pseudo Random Binary Sequence (PRBS) 1 + x 28 + x 31 –groups of 8 successive PRBS bits are mapped into a data byte

51 51 April 2002 Mapping bit stream with[out] octet timing G.709 provides a generic mapping for client signals encapsulated into a bit stream, with or without octet timing A regional standards organisation or an industry forum may deploy this mapping for a new client signal It must also define the OPUk Client Specific (CS) overhead

52 52 April 2002 Bit Rate Agnostic CBR Mapping New mapping method which maps a CBR signal of any rate (within a range up to OPUk payload capacity) Bit rate is a fixed bit rate with a small tolerance in the ppm range. For inclusion in G.709 version 2 Description in G.709 Living List Further development in 2001/2002 timeframe

53 53 April 2002 Contents OTN Rationale OTN Layer Networks Multi level Connection Monitoring OTM Signals Maintenance Signals Mapping Client Signals Multiplexing Virtual Concatenation OTN Standards Wavelength Division Multiplex (WDM) Time Division Multiplex (TDM) TDM Tributary Slots TDM Overhead TDM Mapping

54 54 April 2002 Wavelength Division Multiplex OTM-16r.m signal 16 channels fixed 200 GHz grid independent of bit rate of OCh signal designed for interworking purposes OTM-n.m signal no predefined number of channels no predefined grid grid may depend on bit rate of OCh signal –e.g. 25, 50, 100 GHz for OTU1, OTU2, OTU3 resp. developments in technology are driving capabilities

55 55 April 2002 Wavelength Division Multiplex - Structure

56 56 April 2002 Time Division Multiplex TDM muxing in the OTN will be applied for: lower rate service signal transport –in long distance line systems and/or sub-networks optimised for single (higher) bit rate increased throughput –in optical fabrics and/or sub-networks reduced administrative complexity –in large networks lower cost networks TDM muxing introduces additional complexity when tributary signal must be routed requires demux and mux stages around switch fabric

57 57 April 2002 Time Division Multiplex TDM muxing is muxing of ODUk signals into higher order ODUk signals ODU1 into ODU2 ODU1 and/or ODU2 into ODU3 –ODU1 into ODU2 into ODU3 is possible, but not the recommended method when ODU1s are the service signals that are to be switched/cross connected within an "ODU3 network" –if ODU1s enter such ODU3 network via ODU2, the ODU2 is terminated at the edge and the ODU1s are remultiplexed into an ODU3 –if ODU2 is service signal, of course no demuxing/remuxing will occur at edges Multiplexing via byte interleaving

58 58 April 2002 Time Division Multiplex - Structure

59 59 April 2002 Time Division Multiplex - artist impression 4x ODU1 into ODU2 payload ODU1 adapted to ODU2 clock via justification adapted ODU1 signals byte interleaved into OPU2 ODU2 and OTU2 overhead added ODU1 floats in ¼ of the OPU2 ODU1 frame will cross an ODU2 frame boundary

60 60 April 2002 Time Division Multiplex - ODU2 Tributary Slot Allocation

61 61 April 2002 Time Division Multiplex - ODU3 Tributary Slot Allocation

62 62 April 2002 Time Division Multiplex - Overhead MSI, JC, PJO1, PJO2

63 63 April 2002 Time Division Multiplex - Mapping Asynchronous mapping of ODU information bytes -1, 0, +1, +2 byte justification control ODU1 into ODU3 mapping includes Fixed Stuff column ODU1 into ODU2 and ODU2 into ODU3 mapping is without fixed stuff

64 64 April 2002 Contents OTN Rationale OTN Layer Networks Multi level Connection Monitoring OTM Signals Maintenance Signals Mapping Client Signals Multiplexing Virtual Concatenation OTN Standards ODUk-Xv OPUk-Xv Overhead Mapping Client signals

65 65 April 2002 Virtual Concatenation Virtual Concatenated ODUk's ODUk-Xv, with X= Provide Ability to transport STM-64 and STM-256 signals via fibers not supporting 10G and/or 40G wavelengths –STM-64 into ODU1-4v –STM-256 into ODU2-4v or ODU1-16v Finer granularity bandwidth for data signals –X * 2G5 [10G] [40G] via ODU1-Xv [ODU2-Xv] [ODU3-Xv] –Application of Link Capacity Adjustment Scheme (LCAS, Rec. G.7042) offers  Hitless bandwidth modification  Build in resilience when signal components routed via two or more diverse routes

66 66 April 2002 Virtual Concatenation - Inverse muxing Mapping of client signal into OPUk-X Inverse muxing of OPUk-X signal into X OPUk signals ODUk overhead is added to each of the X OPUk signals ODUk signals are transported

67 67 April 2002 Virtual Concatenation - Overhead PSI vcPT VCOH MFI1, MFI2 SQ LCAS –CTRL –GID –RSA –MST –CRC8 –Res

68 68 April 2002 Virtual Concatenation - Mapping STM-N asynchronous bitsynchronous ATM GFP (IP, ETH, MPLS) Test signals STM-256 into OPU2-4v STM-64 into OPU1-4v STM-256 into OPU1-16v

69 69 April 2002 Contents OTN Rationale OTN Layer Networks Multi level Connection Monitoring OTM Signals Maintenance Signals Mapping Client Signals Multiplexing Virtual Concatenation OTN Standards

70 70 April 2002 OTN Standards in ITU-T - Transport Plane Framework Network Architecture Structures and bit rates Equipment Equipment Management Function Protection Data Communication Network Jitter & Wander Performance Error Performance Physical Information Model Optical Safety Generic Framing Procedure Link Capacity Adjustment Scheme Bringing into Service & Maintenance Q factor measurement G.871 (10/00) G.872 (10/01) G.709 (02/01), G.709 am.1 (10/01) G.798 (10/01) G.874 (10/01), G.7710 (11/01) G.gps (2002), G.otnprot (2002) G.7712 (10/01) G.8251 (2002) G.optperf (2002) G (02/01), G.693, G.dsn (2003) G (10/01), G.875 (2002) G.664 (06/99) G.7041 (10/01) G.7042 (10/01) M.24otn (2003) O.qfm (?)

71 71 April 2002 OTN Standards in ITU-T - Control Plane Automatic Switched Transport Network Automatic Switched Optical Network Distributed Connection Management Automatic Discovery Techniques Routing Signalling Communication Network Link Resource Manager G.807 (05/01) G.8080 (10/01) G.7713 (10/01) G.7714 (10/01) G.7715 (2002) G.7712 (10/01) G.7716 (2002?)

72 72 April 2002 OTN Standards in ITU-T

73 73 April 2002 OTN Standards in ITU-T

74 THANK YOU


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