System Description NT7E65DJ What s inside... SONET Transmission Products S/DMS TransportNode OC-3/OC-12 NE TBM

Transcription

1 NT7E65DJ SONET Transmission Products S/DMS TransportNode / NE TBM System Description Standard Rel 14 February 2001 What s inside... Introduction to S/DMS TransportNode TBM network element / TBM terminal network element / TBM linear ADM network element TBM ring ADM network element TBM regenerator network element TBM control shelf SONET DCC bridge System interfaces Network synchronization Breaker interface panel (BIP) SONET

2 Copyright Nortel Networks, All Rights Reserved The information contained herein is the property of Nortel Networks and is strictly confidential. Except as expressly authorized in writing by Nortel Networks, the holder shall keep all information contained herein confidential, shall disclose it only to its employees with a need to know, and shall protect it, in whole or in part, from disclosure and dissemination to third parties with the same degree of care it uses to protect its own confidential information, but with no less than reasonable care. Except as expressly authorized in writing by Nortel Networks, the holder is granted no rights to use the information contained herein. Nortel Networks and S/DMS TransportNode are trademarks of Nortel Networks. VT100 is a trademark of Digital Equipment Corporation. UNIX is a trademark of X/Open Company Ltd. Printed in Canada

3 iii Contents What s inside... About this document References in this document x ix Introduction to S/DMS TransportNode 1-1 The SONET standard for optical transport 1-1 S/DMS product family 1-2 S/DMS TransportNode 1-3 Transport Bandwidth Manager 1-3 Transport Bandwidth Manager 1-4 Express network element 1-4 OC-48 network element 1-5 OC-192 network element 1-5 SONET Radio 4/40 network element 1-6 Preside, Integrated Network Management, and Network Manager 1-7 TBM network element 2-1 Shelf configurations 2-1 Transport services 2-2 TBM network element 2-2 TBM network element 2-4 DS3 clear channel 2-11 STS-1 timeslot assignment 2-11 VT timeslot assignment 2-12 VT1.5 timeslot assignment on BLSR 2-13 VT management on /STS-1 tributaries 2-14 Equipment features 2-15 Traffic protection 2-15 Upgrades 2-16 Full cable connectorization 2-16 Orderwire 2-16 Bay and shelf equipment 2-16 TBM shelf and cooling cable organizer panel (COP) kit (NT7E51AA) 2-16 Bay packages with the TBM shelf and cooling COP kit (NT7E51AA) 2-17 Standard bay packages 2-17 Enhanced bay packages 2-18 Bay frames 2-18 TBM shelves 2-18 Other bay and shelf accessories 2-19 System Description Rel 14 Standard Feb 2001

4 iv Contents Shelf circuit packs 2-22 Breaker interface panel (BIP) 2-34 Fiber storage panels 2-37 Fiber splice tray 2-38 / TBM terminal network element 3-1 Shelf layout 3-1 Minimum circuit pack requirement 3-1 Equipping rules 3-3 Tributaries 3-3 Operations controller (OPC) 3-4 Additional considerations 3-4 Shelves with DS3 and STS-1 tributaries 3-4 Upgrade to ADM 3-5 multishelf linear configurations 3-5 External synchronization interface 3-5 terminal shelf layouts 3-7 All DS1 tributaries (with OPC) 3-7 DS1, DS3, and STS-1 tributaries (with OPC) 3-8 DS3 or STS-1 tributaries (with OPC) 3-12 terminal shelf layouts 3-13 All DS1 tributaries (with OPC) 3-13 DS1, DS3, and STS-1 tributaries (with OPC) 3-14 DS3 or STS-1 tributaries (with OPC) 3-18 All tributaries (with OPC) 3-20 DS1 and tributaries (with OPC) 3-21 DS3, STS-1, and tributaries (with OPC) 3-23 DS1, DS3, STS-1, and tributaries (with OPC) 3-27 All tributaries (without OPC) 3-28 DS1 and tributaries (without OPC) 3-29 DS3, STS-1, and tributaries (without OPC) 3-32 DS1, DS3, STS-1, and tributaries (without OPC) 3-34 / TBM linear ADM network element 4-1 Overview 4-1 Shelf layout 4-2 Minimum circuit pack requirement 4-2 Equipping rules 4-4 Tributaries 4-4 Operations controller (OPC) 4-5 Additional considerations 4-6 Shelves with DS3 and STS-1 tributaries 4-6 multishelf linear configurations 4-6 circuit packs 4-6 linear ADM shelf layouts 4-7 All DS1 tributaries (with OPC) 4-9 DS1, DS3, and STS-1 tributaries (with OPC) 4-10 DS3 and STS-1 tributaries (with OPC) 4-11 All DS1 tributaries (without OPC) 4-12 DS1 and DS3 or STS-1 tributaries (without OPC) 4-13 S/DMS TransportNode / NE TBM Vol Rel 14 Standard Feb 2001

5 Contents v DS1, DS3, and STS-1 tributaries (without OPC) 4-14 DS3 and STS-1 tributaries (without OPC) 4-16 linear ADM shelf layouts 4-17 All DS1 tributaries (with OPC) 4-19 DS1, DS3, and STS-1 tributaries (with OPC) 4-20 DS3 and STS-1 tributaries (with OPC) 4-21 DS1 and tributaries (with OPC) 4-22 DS3 or STS-1, and tributaries (with OPC) 4-23 All tributaries (with OPC) 4-24 All DS1 tributaries (without OPC) 4-25 DS1, DS3, and STS-1 tributaries 4-26 DS3 and STS-1 tributaries (without OPC) 4-30 DS1 and tributaries (without OPC) 4-31 DS1, DS3, STS-1, and tributaries (without OPC) 4-33 DS3, STS-1, and tributaries (without OPC) 4-34 All tributaries (without OPC) DS1 multishelf configuration 4-36 TBM ring ADM network element 5-1 Overview 5-1 NWK ring ADM 5-1 Shelf layout 5-2 Minimum circuit pack requirement 5-2 Equipping rules for the NWK ring ADM 5-4 Tributaries 5-4 Operations controller (OPC) 5-5 Additional considerations 5-6 Shelves with DS3 and STS-1 tributaries 5-6 multishelf ring configurations 5-6 circuit packs in an NWK ring 5-6 NWK ring ADM shelf layouts 5-7 All DS1 tributaries (with OPC) 5-9 DS1 and DS3 or STS-1 tributaries (with OPC) 5-10 DS3 and STS-1 tributaries (with OPC) 5-11 DS1 and tributaries (with OPC) 5-12 DS3 or STS-1, and tributaries (with OPC) 5-13 All tributaries (with OPC) 5-14 All DS1 tributaries (without OPC) 5-15 DS1, DS3, and STS-1 tributaries (without OPC) 5-16 DS3 and STS-1 tributaries (without OPC) 5-20 DS1 and tributaries (without OPC) 5-21 DS1, DS3 or STS-1, and tributaries (without OPC) 5-24 DS3, STS-1, and tributaries (without OPC) 5-25 All tributaries (without OPC) 5-26 Collocated NWK ring ADMs 5-27 VTM ring ADM 5-29 Shelf layout 5-29 Minimum circuit pack requirement 5-30 Equipping rules for the VTM ring ADM 5-32 Tributaries 5-32 System Description Rel 14 Standard Feb 2001

6 vi Contents Operations controller (OPC) 5-33 Additional considerations 5-33 multishelf ring configurations 5-33 circuit packs in a VTM ring 5-33 VTM ring ADM shelf layouts 5-33 All DS1 tributaries 5-36 DS1 and DS3 tributaries 5-37 All DS3 tributaries 5-41 Collocated VTM ring ADMs 5-42 TBM regenerator network element 6-1 Overview 6-1 Shelf layout 6-2 Equipping rules 6-3 TBM control shelf 7-1 Overview 7-1 Shelf layout 7-1 Equipping rules 7-1 SONET DCC bridge 8-1 CNet LAN 8-1 SONET DCC bridge 8-2 System interfaces 9-1 Optical transport interfaces for network elements other than VTM ring ADMs 9-1 Optical transport interfaces for VTM ring ADMs 9-2 Digital transport interfaces 9-2 OAM interfaces 9-3 Network element user interfaces 9-3 OPC ports 9-4 E2A TBOS ports 9-4 Parallel telemetry ports 9-4 Ethernet port 9-4 Orderwire interfaces 9-6 Orderwire channels 9-7 Orderwire operation 9-7 Processor circuit pack 9-8 Maintenance interface controller circuit pack 9-9 Operations controller (OPC) 9-10 Solid state OPC (NT7E24EA or NT7E24FA) 9-10 OPC communications 9-13 OPC software 9-14 Network surveillance 9-16 Network provisioning 9-16 OPC backup 9-16 TL1 interface 9-17 OSI interface 9-17 TL1 access from the network elements of other vendors 9-17 S/DMS TransportNode / NE TBM Vol Rel 14 Standard Feb 2001

7 Contents vii Overview of the TARP protocol 9-17 TARP message types 9-19 TARP transparency on the TBM network element 9-19 TARP support on the OPC in mixed-vendor networks 9-20 Network synchronization 10-1 Introduction to network synchronization 10-1 Timing sources 10-1 Stratum clocks 10-2 Synchronization hierarchy 10-3 Building-integrated timing supply (BITS) 10-5 Introduction to synchronization status messaging 10-6 Shelf timing 10-7 Breaker interface panel (BIP) 11-1 Features 11-3 Power distribution 11-5 ACO pushbutton 11-8 Lamp test 11-8 BIP power failure 11-8 Office alarm relays 11-8 Control 11-8 Office relay drive 11-9 Bay status and alarm lamps 11-9 Optional modem 11-9 BIP interfaces Office alarm interface Shelf power interface Shelf alarm interface Modem interface SONET 12-1 STS-1 building block 12-1 Overhead 12-2 STS path (9 bytes) 12-3 STS line (18 bytes) 12-3 STS section (9 bytes) 12-3 STS layers 12-4 Overhead layers 12-5 Virtual tributaries 12-8 VT grouping 12-8 DS1 visibility 12-9 Pointers Concatenated payloads System Description Rel 14 Standard Feb 2001

8 viii Contents S/DMS TransportNode / NE TBM Vol Rel 14 Standard Feb 2001

9 About this document ix This document provides a system level description of the S/DMS TransportNode synchronous fiber-optic transmission system. Information in the subsequent chapters includes an introduction to the S/DMS TransportNode family, and network element features, and equipment configurations. A brief introduction to the synchronous optical network (SONET) standard is provided at the end of this document. Audience This document is for the following members of the operating company: strategic planners current planners provisioners transmission standards engineers network administrators Although this document is primarily for those listed above, it serves as a concise introduction to the equipment and is recommended reading for anyone working with an / network element. System Description Rel 14 Standard Feb 2001

10 x About this document References in this document This document refers to the following documents: Circuit Pack Descriptions, Signal Flow and Protection Switching Descriptions, System Applications Description, Technical Specifications, TL1 Interface Description, Installation Procedures, Commissioning Procedures, Provisioning and Operations Procedures, Alarm and Trouble Clearing Procedures, Module Replacement Procedures, System Applications Description, System Applications Description, User Interfaces Description, Network Manager User Guide, System Description, Introduction, S/DMS TransportNode / NE TBM Vol Rel 14 Standard Feb 2001

11 1-1 Introduction to S/DMS TransportNode 1- This chapter describes the members of the S/DMS TransportNode family. The S/DMS TransportNode family includes the and Transport Bandwidth Manager (TBM), Express, OC-48, OC-192, and Radio 4/40 network elements. The SONET standard for optical transport Synchronous optical network (SONET) is the standard for optical transport developed by the Exchange Carriers Standards Association (ECSA) for the American National Standards Institute (ANSI). The standard has been incorporated into the recommendations of the International Telecommunication Union Telecommunication Standardization Sector (ITU T, formerly CCITT). For more information about the SONET standard, see SONET on page SONET advantages include: multivendor environment (mid-span meet) synchronous networking enhanced operations, administration, maintenance, and provisioning (OAM&P) positioning of the network for transport of new services SONET defines optical carrier (OC) levels and the synchronous transport signals (STS) that are their electrical equivalents. The base rate is Mbit/s. Higher rates are direct integer multiples of the base rate. The SONET line rates are illustrated in Table 1-1. SONET defines a physical layer, (the photonic layer). SONET requires the photonic layer to interconnect equipment from different vendors. This capability is based on the Open Systems Interconnect (OSI) seven-layer model for data communications. Efforts are currently under way to define the upper layers. System Description Rel 14 Standard Feb 2001

12 1-2 Introduction to S/DMS TransportNode Table 1-1 SONET line rates Optical carrier level Electrical equivalent Line rate (Mbit/s) OC-1 STS STS STS OC-48 STS OC-192 STS Note: The higher line rates are integer multiples of the base rate of Mbit/s. For example, OC-48 = 48 x Mbit/s = Mbit/s. S/DMS product family The Nortel Networks S/DMS family of SONET-based products meets the evolving needs of the telecommunications industry. Nortel Networks offers fiber and radio transmission systems, digital switches, and access equipment. The S/DMS product family consists of: S/DMS TransportNode: S/DMS AccessNode: S/DMS SuperNode: SONET fiber and radio products designed for high-capacity transport applications. Fiber products designed for multiservice access applications. A digital switch developed for the new generation of switching products. Deployed together, the S/DMS family can provide a single synchronous network (see Figure 1-1). S/DMS TransportNode / NE TBM Vol Rel 14 Standard Feb 2001

13 Introduction to S/DMS TransportNode 1-3 Figure 1-1 S/DMS networking FW-0001 Fiber Center S/DMS TransportNode SONET Radio S/DMS SuperNode / S/DMS AccessNode OC-48 OC-192 OC-48 OC-192 / S/DMS AccessNode S/DMS TransportNode The S/DMS TransportNode family provides for the increasing demand for new broadband services and high-capacity transport systems. To supply these needs and the need for multi-vendor compatibility, S/DMS TransportNode has been developed for full SONET compliance. S/DMS TransportNode addresses the trend toward future SONET networking. The S/DMS TransportNode family includes different types of network elements, which are used for high-capacity transport. A description of each network element follows. Transport Bandwidth Manager The Transport Bandwidth Manager (TBM) network element (see Figure 1-2) transports up to 12 DS3 signals, 12 STS-1 signals, four signals, 168 DS1 signals, or, in a multishelf configuration, 336 DS1s. The tributary signals are converted into a SONET optical signal for transmission over single-mode fiber or to an STS-12 signal for transmission over a coaxial cable to collocated equipment. STS-12 or signals originating from the TBM can be terminated as tributaries on the OC-48 network element. The TBM shelf can also be configured as a linear ADM, a hub (with tributaries), or an ADM node in a ring. For more information, see System Applications Description, System Description Rel 14 Standard Feb 2001

14 1-4 Introduction to S/DMS TransportNode Figure 1-2 TBM network element FW-0002 (R10) DS1, DS3, STS-1, TBM Transport Bandwidth Manager The Transport Bandwidth Manager (TBM) network element (see Figure 1-3) transports up to 3 DS3 signals, 3 STS-1 signals, or 84 DS1 signals. The tributaries are converted into a SONET optical signal for transmission over single-mode fiber. signals originating from an TBM shelf can be configured as tributaries for TBM network elements and for OC-48 network elements. For more information, see System Applications Description, Figure 1-3 TBM network element FW-1917 DS1, DS3, STS-1 TBM Express network element The Express network element (see Figure 1-4) transports up to 3 DS3 signals or 84 DS1 signals. The tributaries are converted into a SONET optical signal for transmission over single-mode fiber. signals originating from an Express shelf can be configured as tributaries for TBM network elements and for OC-48 network elements. For more information, see System Description, Figure 1-4 Express network element FW-1917 (exp) DS1, DS3 Express S/DMS TransportNode / NE TBM Vol Rel 14 Standard Feb 2001

15 Introduction to S/DMS TransportNode 1-5 OC-48 network element The OC-48 network element (see Figure 1-5) transports up to 48 STS-1 equivalent signals. These signals are provided by tributaries, which can be a mix of a number of signal types. Up to 48 level-3 digital signals (DS3s) are supported, each of which maps to a single STS-1 timeslot on the OC-48 optics. Similarly, there can be up to 48 STS-1 tributaries, four protected tributaries, eight unprotected tributaries, four STS-12 tributaries, or four tributaries. The tributary signals are converted into the SONET OC-48 optical format for transmission over single-mode (dispersion shifted or non-dispersion shifted) fiber. The OC-48 supports flexible timeslot assignment (TSA), which allows the various tributaries to be mapped to the 48 STS-1 timeslots on the transport optics. The OC-48 network element can also transport STS-3c (concatenated) signals originating on, STS-12, or tributaries and STS-12c signals originating on STS-12 or tributaries. An OC-48 terminal shelf that terminates, STS-12, or tributaries can indirectly terminate DS1 traffic that originates from connected, STS-12, or equipment. For example, a two-shelf TBM network element can indirectly provide an OC-48 terminal shelf with 336 DS1s (the capacity of one or STS-12 signal), and four two-shelf TBM network elements can provide 1344 DS1s. Network configurations are described in System Applications Description, Figure 1-5 OC-48 network element DS3, STS-1,, STS-12, OC-48 Network Element OC-48 FW-0003 (R12) OC-192 network element The OC-192 network element (see Figure 1-6) transports up to four OC-48 signals. The OC-48 tributary signals are multiplexed into a SONET OC-192 optical signal for transmission over single-mode fiber. You can configure the OC-192 network element shelf as either a terminal in a point-to-point system or as an ADM node for a ring. For more information, see System Description, System Description Rel 14 Standard Feb 2001

16 1-6 Introduction to S/DMS TransportNode Figure 1-6 OC-192 network element FW-0003 (192) OC-48/STS-48 OC-192 Network Element OC-192 SONET Radio 4/40 network element The SONET Radio 4/40 (see Figure 1-7) is a SONET-based digital microwave radio transmission system. The direct interface to the SONET Radio 4/40 system is an electrical STS-12 signal. The STS-12 signal is split between two radio channels (the lower and upper 4-GHz frequency bands, designated L4 and U4). Each radio channel can carry an STS-6 payload within a 40-MHz channel bandwidth through a 512-QAM (quadrature amplitude modulation) technique. To support lower-rate interfaces, you can incorporate an TBM shelf equipped with an STS-12 interface into the radio configuration. The SONET Radio 4/40 system can also be interfaced with an OC-48 network element by way of STS-12 tributaries. SONET Radio 4/40 equipment is available in terminal and regenerator configurations. For more information, see System Applications Description, Figure 1-7 SONET Radio 4/40 network element FW Radio frequency SONET Radio 4/40 regenerator Radio frequency 2 radio channels (40 MHz bandwidth each) DS1, DS3, STS-1, TBM shelf STS-12 SONET Radio 4/40 terminal Radio frequency Note: Each radio channel carries an STS-6 payload. FW S/DMS TransportNode / NE TBM Vol Rel 14 Standard Feb 2001

17 Introduction to S/DMS TransportNode 1-7 Preside, Integrated Network Management, and Network Manager Preside provides a graphical consolidated view of the network elements in a transmission network. It is an evolution of Integrated Network Management (M) Broadband and the Network Manager. These UNIX-based applications provide a graphical end-to-end view of S/DMS TransportNode systems and networks. They provide active alarm details collected from the NEs in the by way of the OPCs controlling the NEs. They also provide a single point of access to the OAM&P functions of all the OPCs and NEs in the network. The network can consist of several groups of network elements where each NE is managed by a primary OPC, and optionally, by a backup OPC module. For more information, see the Preside or M online help or Introduction, System Description Rel 14 Standard Feb 2001

18 1-8 Introduction to S/DMS TransportNode S/DMS TransportNode / NE TBM Vol Rel 14 Standard Feb 2001

19 2-1 TBM network element 2- This chapter describes the / TBM network element. The chapter includes an introduction to the TBM shelves typically configured in a TBM bay, and a description of the TBM shelf features common to all configurations.the chapter also describes tributary capacities of the TBM shelf and the effects of pass-through traffic on add-drop multiplexer (ADM) configurations. TBM shelves can be used for terminal, ADM, regenerator or control shelves. For more information on each shelf application, see the following chapters. Shelf configurations The / TBM network element configurations are based on a single shelf, with 1+1 or bidirectional line-switched ring (BLSR) protection for transport signals, 1+1 protection for tributaries, and 1:N protection for DS1, DS3, and STS-1 tributaries. A multishelf configuration terminates all 336 DS1 signals that can be transported by an optical signal. Note 1: In TBM network element configurations, you can equip working DS3 and STS-1 circuit packs in the same slots. The shelf layout examples in Chapters 3 to 5 show different variations and the general flexibility of DS3/STS-1 provisioning. Note 2: Two types of bidirectional line-switched rings (BLSR) are the NWK ring and the VTM ring. VT bandwidth management (VTM) is available in the VTM ring. System Description Rel 14 Standard Feb 2001

20 2-2 TBM network element Transport services The following transport services are available. TBM network element You can configure the TBM network element as a terminal or ADM. TBM terminal network element An TBM terminal network element can terminate up to 84 asynchronous DS1s, three asynchronous DS3s, three STS-1 tributaries, or a mixture (see Table 2-1). Table 2-1 Termination options for an TBM terminal network element TBM terminal network element configuration DS1 quantity DS3 or STS-1 quantity All DS DS1/DS3/STS-1 mix 56 1 DS1/DS3/STS-1 mix 28 2 All DS3 0 3 TBM ADM network element The TBM ADM network element can terminate all tributary signals from both the primary and secondary interfaces. This capability allows an add-drop ratio (the ratio of add-drop tributary quantity to capacity) of up to 2:1 if all tributary traffic is added and dropped. The TBM ADM network element can add-drop up to 168 asynchronous DS1 signals or up to 6 asynchronous DS3 or STS-1 signals, if there is no pass-through traffic. Figure 2-1 shows the effects of pass-through traffic on the capability of the TBM ADM to add and drop tributary traffic. Table 2-2 supplies numerical values for tributaries and the effects of pass-through traffic. S/DMS TransportNode / NE TBM Vol Rel 14 Standard Feb 2001

21 TBM network element 2-3 Figure 2-1 TBM ADM network element showing STS-1 pass-through traffic No pass through FW-2284 (R8) (secondary) (primary) STS-1 #3 STS-1 #3 STS-1 #2 STS-1 #1 STS-1 #2 STS-1 #1 6 STS-1s, 6 DS3s, 168 DS1s, or a mixture 1 STS-1 passed through (secondary) (primary) STS-1 #3 STS-1 #3 STS-1 #2 STS-1 #1 STS-1 #2 STS-1 #1 4 STS-1s, 4 DS3s, 112 DS1s, or a mixture 2 STS-1s passed through (secondary) (primary) STS-1 #3 STS-1 #3 STS-1 #2 STS-1 #1 STS-1 #2 STS-1 #1 2 STS-1s, 2 DS3s, 56 DS1s, or a mixture System Description Rel 14 Standard Feb 2001

22 2-4 TBM network element Table 2-2 Effects of pass-through traffic on the ADM Total tributaries (shelf limited) Max tributaries in one direction (bandwidth limited) STS-1s passed through DS1 circuits add-dropped DS3 or STS-1 circuits add-dropped DS1 circuits add-dropped DS3 or STS-1 circuits add-dropped TBM network element You can configure the TBM network element as a terminal, a linear ADM, an NWK ring ADM, a VTM ring ADM, or a regenerator. You can produce a multishelf terminal network element by combining a terminal shelf and a linear ADM shelf. TBM terminal network element A single shelf TBM network element can terminate up to 168 asynchronous DS1 tributaries, 12 asynchronous DS3 tributaries, 12 STS-1 tributaries, 4 protected tributaries, or a mixture (see Table 2-3). S/DMS TransportNode / NE TBM Vol Rel 14 Standard Feb 2001

23 TBM network element 2-5 Table 2-3 Termination options of a single shelf TBM network element TBM network element configuration DS1 quantity DS3 or STS-1 quantity quantity With OPC (no tributaries) All DS DS1/DS3/STS-1 mix DS1/DS3/STS-1 mix DS1/DS3/STS-1 mix DS3/STS tributaries with OPC DS1/ mix DS1/ mix DS1/DS3/STS-1/ mix DS3/STS-1/ mix DS3/STS-1/ mix DS3/STS-1/ mix All tributaries tributaries without OPC DS1/ mix DS1/ mix DS1/ mix DS1/DS3/STS-1/ mix DS1/DS3/STS-1/ mix DS1/DS3/STS-1/ mix DS1/DS3/STS-1/ mix DS3/STS-1/ mix DS3/STS-1/ mix All tributaries System Description Rel 14 Standard Feb 2001

24 2-6 TBM network element TBM linear ADM network element The TBM linear ADM network element can terminate tributaries from both the primary and secondary interfaces. A single shelf ADM network element can terminate a maximum of 168 DS1 signals, or 12 DS3 or STS-1. See Table 2-4 for the effects of pass-through traffic. Table 2-4 Effects of pass-through traffic on an linear ADM Total tributaries (shelf limited) Max tributaries in one direction (bandwidth limited) STS-1s passed through DS1 circuits add-dropped DS3 or STS-1 circuits add-dropped DS1 circuits add-dropped DS3 or STS-1 circuits add-dropped (see Note) 112 (see Note) (see Note) continued S/DMS TransportNode / NE TBM Vol Rel 14 Standard Feb 2001

25 Table 2-4 (continued) Effects of pass-through traffic on an linear ADM TBM network element 2-7 Total tributaries (shelf limited) Max tributaries in one direction (bandwidth limited) STS-1s passed through DS1 circuits add-dropped DS3 or STS-1 circuits add-dropped DS1 circuits add-dropped DS3 or STS-1 circuits add-dropped Note: Although bandwidth is available to carry this many DS1 circuits, shelf restrictions limit the number of DS1 signals to 84, when a DS3 or STS-1 circuit is present. end TBM multishelf terminal network element An linear ADM shelf and an terminal shelf can be collocated in a bay and interconnected using intra-office interface circuit packs. This configuration can terminate all 336 DS1 tributaries delivered by an fiber. In this configuration, up to half of the STS-1 signals are passed through the ADM to terminate on the terminal shelf (see Figure 2-2). The other half are terminated at the ADM. Table 2-5 shows possible tributary terminations and whether the configurations use the entire bandwidth of the STS-12 signal. In these examples, shelf 1 is fully provisioned, with overflow STS-1 tributaries routed to and terminated by shelf 2. System Description Rel 14 Standard Feb 2001

26 2-8 TBM network element Figure 2-2 TBM multishelf terminal FW (R8) Terminal STS-12 ADM OAM DS1, DS3, STS-1,, or mix OAM DS1, DS3, STS-1,, or mix Table 2-5 Possible tributary terminations on the shelf Shelf 1 (ADM) Shelf 2 (terminal) DS3 or STS-1 DS1 DS (see Note) (see Note) (see Note) Note:These configurations do not use the entire bandwidth of the STS-12 signal. S/DMS TransportNode / NE TBM Vol Rel 14 Standard Feb 2001

27 TBM network element 2-9 TBM NWK ring ADM network element The TBM NWK ring ADM network element can terminate tributaries originating from other NWK ring ADM nodes located both clockwise and counterclockwise of its location. A maximum of 84 DS1 signals, or 6 DS3 or STS-1 signals can be terminated in each direction, when no the traffic is pass-through. See Table 2-6 for the effects of pass-through traffic on the total tributary traffic added or dropped (from both directions). TBM VTM ring ADM network element The TBM VTM ring ADM network element can terminate DS1 and DS3 tributaries originating from other VTM ring ADM nodes located both clockwise and counterclockwise of its location. A maximum of 84 DS1 tributaries or 6 DS3 tributaries can be terminated in each direction, when no traffic is pass-through. See Table 2-6 for the effects of pass-through traffic. TBM regenerator network element The regenerator network element regenerates the optical signal. The regenerator network element does not terminate tributaries. TBM control network element If you equip an OPC in a terminal or ADM network element, you reduce the number of tributaries that can be added or dropped. In these cases, a control network element shelf is commissioned to hold the OPC. The control network element is defined as a terminal network element, but the control network element does not contain transport interface or tributary circuit packs. System Description Rel 14 Standard Feb 2001

28 2-10 TBM network element Table 2-6 Effects of pass-through traffic on an ring ADM Total tributaries (shelf limited) Max tributaries in one direction (bandwidth limited) STS-1s passed through DS1 circuits add-dropped DS3 or STS-1 circuits add-dropped DS1 circuits add-dropped DS3 or STS-1 circuits add-dropped (see Note) 112 (see Note) (see Note) continued S/DMS TransportNode / NE TBM Vol Rel 14 Standard Feb 2001

29 Table 2-6 (continued) Effects of pass-through traffic on an ring ADM TBM network element 2-11 Total tributaries (shelf limited) Max tributaries in one direction (bandwidth limited) STS-1s passed through DS1 circuits add-dropped DS3 or STS-1 circuits add-dropped DS1 circuits add-dropped DS3 or STS-1 circuits add-dropped Note: Although bandwidth is available to carry this many DS1 circuits, shelf restrictions limit the number of DS1 tributaries to 84, when a DS3 or STS-1 circuit is present. end DS3 clear channel A DS3 clear channel transports unframed DS3 payloads. Services such as special video encoding and interoffice computer-to-computer exchanges are carried on DS3 clear channels. STS-1 timeslot assignment STS-1 timeslot assignment (TSA) is the capability of assigning a tributary signal to any STS-1 timeslot on either the primary or secondary optical interface. A tributary signal can be a DS3, STS-1,, or a set of 28 DS1 signals. Figure 2-3 shows the concept of timeslot assignment. System Description Rel 14 Standard Feb 2001

30 2-12 TBM network element Figure 2-3 ADM example showing effect of TSA FW-2285 (Rel 11) DS3 G1 port 1 is assigned to STS-1 #1 at G1S/G2 DS3 G1 port 2 is assigned to STS-1 #2 at G1 DS1 G7, G8 circuits 1 to 28 are assigned to STS-1 #2 at G1S/G2 DS1 G9, G10 circuits 1 to 28 are assigned to STS-1 #1 at G1 STS-1 #3 G1S/ G2 STS-1 pass-through G1 STS-1 #3 STS-1 #2 STS-1 #2 STS-1 #1 STS-1 # DS3 mapper DS1 mapper pair DS1 mapper pair cp G1 cp G7,G8 cp G9,G10 VT timeslot assignment VT timeslot assignment (VT TSA) is the capability of assigning a DS1 tributary signal to a VT time slot on the primary optical interface. VT TSA is supported only in systems that support VTM. VT TSA is possible only in systems in which the primary optical interface is handled by VTM circuit packs. Only VTM rings support VT TSA. In such a system, you can specify the VT time slot in which a DS1 travels through the system. This capability is called VT TSA. You can access the VT signals in an STS-1 only if you specify that the STS-1 pipe is VT-managed. A VT-managed STS-1 is one in which the cross-connects on the optics at the endpoint network elements involve VT signals. S/DMS TransportNode / NE TBM Vol Rel 14 Standard Feb 2001

31 TBM network element 2-13 To perform VT-level traffic management, provision VT-managed STS-1 paths in such a way that all VT-level end-to-end connections are carried by one or more end-to-end VT-managed STS-1 paths. To set up the path, provision VT-managed STS-1 add/drop at the two end network elements and any intermediate elements. To specify VT-level traffic management, use the OPC Connection Manager tool. Sub-level screens and commands are available on the Connection Manager to provision VT connections. For information on the Connection Manager, see User Interfaces Description, Note: Once assigned to a VT timeslot, the DS1 travels through the network to its destination in that timeslot. If the VT must pass through one or more intermediate network elements on its way to its destination, those network elements do not switch the VT into another timeslot in the SONET signal. VT1.5 timeslot assignment on BLSR VT1.5-level connections are only supported in BLSR systems which have all their ring ADM network elements equipped with VTM optical interface circuit packs (NT7E05). Provisioning guidelines The following guidelines apply to provisioning BLSR systems: Minimize the total number of STS-1 paths by centralizing the VT add/drop traffic in a VTM-based network element managing add/drop VT1.5 connections. By minimizing the number of STS-1 paths provisioned in a network, the remaining network bandwidth remains available for either VT or STS-level traffic. Provision VTs in ascending order starting at the lowest group number. For example, in STS number 1, provision VT 1, VT 2 and so on for VT group 1. Do the same for VT group 2, 3, and so on. This will simplify the provisioning of VT groups in the future. Provision STS traffic in ascending order starting at the lowest group number. That is, provision STS-1 number 1, then STS-1 number 2, and so on. This is especially important for linear systems which may later be converted to ring systems (all traffic on STS-1 channel number 7 and above must be rolled over or rerouted in the linear system before it can be reconfigured into a BLSR system since the BLSR accommodates six STS-1 channels in each direction). Note: Users may also want to create rules of their own depending on their network configuration. For example, provisioning all STS-managed traffic (DS3s which cannot be VT managed) on STS-1s number 1 to 3, and all VT-managed traffic on the remaining STS-1s. System Description Rel 14 Standard Feb 2001

32 2-14 TBM network element VT management on /STS-1 tributaries The following guidelines apply to VT management on /STS-1 tributaries: Virtual tributaries from /STS-1 tributaries must be connected in sequence to the corresponding VTs in the STS-1 path on the transport side equipment (that is, the line). The VTs must be connected in this manner since the bandwidth on the current STS-1 (NT7E09AA) and (NT7E01CA/CB/CC/CD and NT7E01DA/DB/DC/DD) circuit packs cannot be VT-managed; therefore, VTs from these tributary types towards the transport side cannot be VT managed. Note: Once the VTs are received at the next sequential network element, they will be VT synchronized and can then be VT managed. VTs from a port of an STS-1/ tributary card must be carried on the same VT-managed STS-1 path. This also implies that the VT-managed STS-1 path cannot be shared by other tributaries or another port of the once it is set up to carry traffic of an STS-1/ tributary. For example, do not set up a DS1-to-DS1 connection through the VT-managed STS-1 path which terminates on an /STS-1 tributary or a misconnection may occur. This can happen even if you use that channel, VT group, VT number as a VT1.5 pass-through. VTs from an STS-1 channel of the STS-1/ tributary card must be connected to the corresponding VTs of the VT-managed STS-1 path. For example, the VT group and VT number of the tributary STS-1 must match the VT group and VT number of the VT-managed STS-1. See Table 2-7. Table 2-7 Correspondence of VT group and number of and STS-1 tributaries Tributary Port VT group VT number Optics Port VT group VT number OC3 G OC12 G OC3 G OC12 G STS1 G OC12 G STS1 G OC12 G STS1 G OC12 G Note: Provision VTs in any order. The STS-1 path overhead (POH) is not connected in the VTM optical interface circuit pack (NT7E05) from the line to the STS-1/ tributary and must be ignored by the external path termination equipment attached to the STS-1/ tributary. S/DMS TransportNode / NE TBM Vol Rel 14 Standard Feb 2001

33 TBM network element 2-15 Equipment features The S/DMS TransportNode family provides several equipment features that ensure fast and efficient equipment installation and maintenance. The features available with the and network elements are discussed in the following paragraphs. Traffic protection The / TBM network element provides single failure protection for low-speed tributary interfaces (DS1, DS3, STS-1) and high speed tributary and transport interfaces (, ). Each protection mechanism operates independently, providing high protection availability. All protection switching is initiated automatically by the equipment. Protection switching can also be initiated or prevented by maintenance personnel. Low speed tributary interfaces are protected in a 1:N configuration. With this scheme, a single protection module protects up to N working modules. tributaries are protected on a 1+1 basis. In linear configurations, transport interfaces are protected on a 1+1 basis; one transport channel provides the redundancy to fully protect another channel. This protection is non-revertive: it does not switch back to the original channel once the cause of the protection switch has been removed. Linear transport protection can be optionally selected for either unidirectional switching (switch in the faulty direction only) or bidirectional switching (switch in both directions, regardless of which is the faulty path). Bidirectional protection switching is recommended. Protection is provided independently for both primary and secondary transport signal interfaces. In the case of NWK ring ADMs and VTM ring ADMs, protection channels for signals arriving from an adjacent network element are provided on the optical fiber travelling in the opposite direction to the same network element. STS-1 channels 1 through 6 are designated as working channels and STS-1 channels 7 to 12 are designated as protection channels. When protection is activated, incoming signals on STS-1 channels 1 through 6 are switched back to the originating network element over corresponding STS-1 channels 7 through 12 in the opposite direction. The matched nodes feature on BLSRs provides a survivable path between BLSRs interconnected with one or more or OC-48 BLSRs as well as,, or OC-48 unidirectional path-switched rings (UPSRs). Matched nodes protect interconnected rings against link and node failures by having STS-1 signals cross ring boundaries at two different network elements. See Signal Flow and Protection Switching Descriptions, , for additional information. System Description Rel 14 Standard Feb 2001

34 2-16 TBM network element Upgrades / TBM network elements support in-service configuration upgrades to permit SONET networks to evolve easily, and therefore provide greater service flexibility. For example, a terminal network element can be upgraded to an ADM configuration, permitting extension of the optical route while allowing access to tributaries at the intermediate site. For improved survivability, linear ADM systems can be upgraded to an NWK ring systems in service. Tributary upgrades include installation of new tributary types and changes to the mix of DS1s, DS3s, STS-1s, and s. Full cable connectorization Cable installation for the / TBM network element is performed with fully connectorized cables. This connectorization eliminates the wire-wrapping associated with the conventional DS1 interface equipment. The DS1 signals use type 608 or 1249C 14-pin cables, while DS3 and STS-1 signals use type 734 coaxial cable with BNC terminations. Orderwire Orderwire channels permit technicians to perform coordinated fault isolation and equipment upgrades. The / TBM network element orderwire supports both local channels (accessible at all network elements) and express channels (accessible at all network elements except regenerators). A 4-wire voice frequency (VF) compatible interface is provided for bridging into other orderwire systems. Bay and shelf equipment The / TBM systems are designed for a wide range of system configurations. The following section describes bay and shelf components, and configuration packages which include combinations of bay and shelf components. For more information, see Ordering Information, TBM shelf and cooling cable organizer panel (COP) kit (NT7E51AA) The TBM shelf and cooling COP kit (NT7E51AA) replaces the TBM shelves and enhanced cooling required for VTM applications. The TBM shelf and cooling COP kit offers the following advantages: The shelf can be equipped with (NT7E02xx) or VTM (NT7E05xx) optical interface circuit packs allowing either TBM or VTM functionality. Each shelf is cooled as an independent unit. This integrated cooling eliminates the need for extra bay cooling (enhanced transport common equipment shelf NT4K19AC, through-flow cooling unit NT4K18BA and fan modules NT4K17BA) previously required for VTM applications. S/DMS TransportNode / NE TBM Vol Rel 14 Standard Feb 2001

35 TBM network element 2-17 The shelf occupies 13 mounting spaces. A bay equipped with three TBM shelf and cooling COP kits (NT7E51AA) gains two mounting spaces for optional equipment such as fiber storage panels. The shelf incorporates four NT7E55AA fans, a cable organizer panel (COP), a plugin section, and an air filter drawer. The NT7E55AA fans can be used on or OC-48 shelves. The housing for the fan assembly is plastic rather than sheet metal, making the fans easier to install. Note: OC-48 fans NT8E55AA cannot be used in the TBM shelf and cooling COP kit (NT7E51AA). Bay packages with the TBM shelf and cooling COP kit (NT7E51AA) Bay configuration packages NT7E78GA, NT7E78GB, NT7E78GC, and NT7E78GD include the following: one, two or three TBM shelf and cooling COP kits (NT7E51AA) in a 2.13-m (7-ft) bay breaker interface panel (BIP) shelf alarm cables filler panels (1 3/4-in. and 21-in) regular anchor bolts a grounding strip a ground bar an ac outlet blank all necessary attachment screws cable ties Note: Earthquake anchor bolts are recommended for Zone 4. Order these bolts separately. For a single shelf in the 2.13 m (7 ft) bay configuration, order the overhead cabling configuration if the shelf is equipped in position 2. Order the raised floor cabling configuration if the shelf is equipped in position 1. Standard bay packages Standard bay configuration packages include TBM transport common equipment shelves (NT4K19AB) but do not include the extra cooling capacity required for VTM applications. The standard bay packages are NT7E78AC, NT7E78BC, and NT7E78CC. System Description Rel 14 Standard Feb 2001

36 2-18 TBM network element Enhanced bay packages Enhanced bay configuration packages include TBM common equipment shelves (NT4K19AB) and the extra cooling capacity required for VTM applications (through-flow cooling unit NT4K18BA for single-shelf, two-shelf and three-shelf configurations, and the enhanced TBM common equipment shelf NT4K19AC for three-shelf configurations). Bay configuration packages with TBM shelf and cooling COP kits (NT7E78GA, NT7E78GB, NT7E78GC, and NT7E78GD) replace the enhanced bay configuration packages (NT7E78DA, NT7E78DB, NT7E78DC, and NT7E78DD). These packages will be manufacturer discontinued in the future. Bay frames A bay frame which houses up to three network elements includes the following components: a bay frame regular anchor bolts a grounding strip a ground bar an ac outlet blank all necessary attachment screws Note: Earthquake anchor bolts are recommended for Zone 4. Order these bolts separately. Bay frames are 658 mm (26 in.) wide and 305 mm (12 in.) deep. Front and rear access bay frames are available in six different heights: 2.13 m (7 ft) 2.29 m (7.5 ft) 2.44 m (8 ft) 2.65 m (8.7 ft) 2.74 m (9 ft) 3.51 m (11.5 ft) TBM shelves The TBM mechanical shelf, configured as a terminal, is shown in Figure 2-6. The mechanical features of the TBM shelf are outlined as follows: Connectors, circuit packs, and cables are completely accessible from the front of the bay. S/DMS TransportNode / NE TBM Vol Rel 14 Standard Feb 2001

37 TBM network element 2-19 The local craft access panel (LCAP) provides access to shelf alarms, a user interface port, the orderwire handset/headset jacks and call pushbutton, the grounding jack, and the alarm cutoff (ACO)/lamp test pushbutton. This panel is accessible without removing the shelf front cover. The left side wing provides connector fields for parallel telemetry, serial telemetry, user interface ports, OPC port, and shelf alarm interface. A power terminal block within the breaker interface panel provides office battery connections. Heat deflectors allow equipment shelves to be mounted directly above one another. One shelf is required for each terminal, regenerator, ADM, or ring ADM each terminal or ADM each TBM control shelf The TBM shelf and cooling COP kit (NT7E51AA) The TBM shelf and cooling COP kit (NT7E51AA) replaces the transport common equipment shelf (NT4K19AB) the enhanced common equipment shelf (NT4K19AC) the through-flow cooling unit (NT4K18BA) These items will be manufacturer discontinued in the year Adding the TBM shelf and cooling COP kit (NT7E51AA) to existing bays The TBM shelf and cooling COP kit (NT7E51AA) can be added to TBM single-shelf and TBM two-shelf bay configurations. The NT7E51AA shelf cannot be integrated into existing three-shelf bay configurations. Only one NT7E51AA shelf can be installed in the NT7E78DA TBM configuration (single-shelf enhanced 2.13 m with raised floor cabling) because the through-flow cooling unit (NT4K18BA) takes up one mounting space. The NT7E51AA shelf can be installed only in position 3, in the NT7E78DD TBM configuration (single-shelf enhanced 2.13 m with overhead cabling). In position 1, the shelf obstructs the air flow of the cooling unit because of the louver air control design of the shelf. Other bay and shelf accessories Bay-mounted units such as the BIP, the cooling unit shelf, and the optional fiber storage panel or fiber splice panel are common to all configurations. A typical bay layout is illustrated in Figure 2-5. System Description Rel 14 Standard Feb 2001

38 2-20 TBM network element Cooling units Cooling units are equipped with fans that force cooling air through the TBM shelves to prevent damage to equipment caused by unusually high temperatures. Cooling unit (NT4K18AA) is installed in standard TBM bays, immediately below TBM shelf position 1. The cooling unit contains three replaceable fan modules (NT4K17AA), each containing two variable-speed fans. The fans force cooling air upwards through the TBM shelves. Through-flow cooling unit (NT4K18BA) is installed in enhanced TBM bays, immediately below TBM shelf position 1. Enhanced TBM bays are used for all VTM applications. The through-flow cooling unit contains three replaceable fan modules (NT4K17BA) that operate at constant high speed. The fans force cooling air upwards through the TBM shelves. COP cooling unit NT7E7802 is required when enhanced TBM bays are equipped with a third shelf (NT4K19AC). The COP cooling unit is part of the TBM shelf. The COP cooling unit contains four fan modules that operate at constant high speed. Figure 2-4 Cooling COP for the TBM shelf and cooling COP kit (NT7E51AA) FW-3373 (TBM,113) To/from Breaker interface panel Connects to A2 and B2 or P2 and P3 of the preceding network element installed Strain relief Tie wrap LCAP cable Power harness cable Alarms cable CO alarms LCAP interface Cooling unit interface S/DMS TransportNode / NE TBM Vol Rel 14 Standard Feb 2001

39 TBM network element 2-21 Figure 2-5 TBM three-shelf bay configuration (NT7E78GC) with TBM shelf and cooling COP kits (NT7E51AA) FW-4116 (TBM, 113) TBM shelf and cooling COP kit (NT7E51AA) Cooling COP (NT7E51CA) TBM shelf (NT7E51BA) Breaker interface panel (NT7E56CA) Filler panels (NT7E52CA) Bay power harness J2 connectors NT7E7804 power cables J1 connectors System Description Rel 14 Standard Feb 2001

40 2-22 TBM network element Shelf circuit packs The TBM shelf has two vertically separate areas to accommodate circuit packs. The slots in the lower level are numbered from 1 to 23 and accommodate optical signal, protection switching, and control circuit packs. These packs are 292 mm (11.5 in.) high and 258 mm (10.15 in.) deep. The slots in the upper level are numbered from 30 to 55 and accommodate I/O circuit packs that terminate the peripheral DS1, DS3, and STS-1 cabling. These smaller packs are 57 mm (2.25 in.) high and 180 mm (7.1 in.) deep. The shelf is configured for a specific application by inserting the required circuit packs into the appropriate locations. Figure 2-7 to Figure 2-13 show the standard locations for transport interface circuit packs and for control circuit packs in the following shelf configurations: terminal, linear ADM, multishelf terminal, NWK ring ADM, VTM ring ADM, regenerator, and control shelf. S/DMS TransportNode / NE TBM Vol Rel 14 Standard Feb 2001