Cisco Systems ONS 15200 manual Optical System Description, Optical Channels, Unprotected Channels

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C H A P T E R 1

Product Technology

This chapter presents the general system technology and the available protection architectures for Cisco’s dense wavelength division multiplexing (DWDM) metro system, the Cisco ONS 15200.

1.1 Optical System Description

The ONS 15200 DWDM metro system transports data over wavelengths using fiber-optic cables. The ONS 15200 operates in the 1550 nm transmission window. Over a single optical fiber pair, the ONS

15200 can carry up to sixteen channels of data in the following bit rates and formats:

•155 Mbps – SONET OC-3 or SDH STM-1

•622 Mbps – SONET OC-12 or SDH STM-4

•2.5 Gbps – SONET OC-48 or SDH STM-16

•100 Mbps – 1.25 Gbps, pass-through mode/2R operation Protected or unprotected data can transmit over the ONS 15200.

The optical layer is independent of the electronic protocol that is external to the ONS 15200 system. You can use any higher-level protocol, including proprietary products, within the ONS 15200 system. Any protocol used must fulfill the requirements listed in this book, including the bit rates listed in this section.

1.2 Optical Channels

In the ONS 15200 system, optical channels transport information between two client-layer interface ports. All optical channels in the ONS 15200 system are duplex channels, which means that traffic flows in both directions. The optical channels can be unprotected, as described in the “Unprotected Channels” section on page 1-1, or protected, as described in the “Protected Channels” section on page 1-2.

1.2.1 Unprotected Channels

In an unprotected channel, protection fiber is not available. Only one fiber sends traffic to the client layer of the receiving node. You can use unprotected channels where protection is not needed or if the client layer provides protection. Cisco recommends that you only use protection in one layer and avoid

Cisco ONS 15200 Product Description

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Contents Corporate Headquarters Cisco ONS 15200 Product DescriptionCisco ONS 15200 Product Description N T E N T S Alarms Acronyms A-1 Contents Cisco ONS 15200 Product Description 78-13766-01 G U R E S Viii NCB Indicators Tables Cisco ONS 15200 Product Description 78-13766-01 Related Documentation Manual StructureWorld Wide Web Relevant StandardsObtaining Documentation Ordering Documentation Optical Networking Product Documentation CD-ROMDocumentation Feedback Obtaining Technical AssistanceTechnical Assistance Center Cisco.comCisco TAC Escalation Center Xvi Unprotected Channels Optical System DescriptionOptical Channels Unprotected channels in an ONS 15200 system Protected ChannelsOptically-fiber protected channels in an ONS 15200 system Software Configurable ProtectionPage Bus Configuration ONS 15200 Network ConfigurationsLogical Connections Ring ConfigurationMultichannel Point-to-Point Configuration Dual-Home ConfigurationRing Configuration with Hubbed and Meshed Traffic Ring configuration with hubbed and meshed traffic Full-Mesh ConfigurationNetwork Protection Four ONS 15252 MCUs in a full-mesh configurationONS 15252 MCU Modularity and Ancillary EquipmentClip ONS 15201 SCU Status Cause Power Distribution PanelFan Unit Fiber Organizer ONS 15252 MCU Physical ConfigurationPhysical Layout Configuration of the ONS 15252 Multichannel Unit Internal BUS Clip NAM Clip NCB HFM ONS 15201 SCU Physical ConfigurationPhysical layout of the ONS 15201 SCU Power and GroundingONS ONS 15252 MCU Power and GroundingElectromagnetic Compatibility Safety SpecificationsEnvironmental Compliance Channel Number Frequency THz Wavelength nm Product SafetyWavelength Grid Page Network Management Overview Network ControlCisco ONS 15200 Product Description 78-13766-01 Hardware Platforms EIA/TIA-232 RS-232 InterfaceSpeed Kbps Data Bits Parity None Stop Bits Flow Control Parameter ValueEthernet interface Command Line InterfaceMA interface Maintenance ManagerInternal Data Bus Web-Based InterfaceONS 15252 MCU internal data bus extension ports Cisco Transport Manager AlarmsSimple Network Management Protocol Interface Condition Name Definition Alarm NameAlarm Name Definition Page Client Layer Interface Port Module OverviewCommunication Interface Module Equipment Version CLIPs Restriction TemperatureONS MaximumStatus Network Adaptation ModuleNetwork Control Board Module Collector Filter Module Bridge ModuleConnection Module Connection Module YTermination Module Hub Filter ModuleLine Module Page Parameter Condition Maximum OperationalOptical Performance OpticalOptical Frequencies Parameter Condition Minimum UnitOptical Loss Includes Connectors Equipment Maximum dBEquipment Maximum dB Includes15201 SCU unprotected optical path 100/0 or 0/100 Parameter Condition Min Max Unit EnvironmentalParameter Units MechanicalParameter Max Unit ElectricalAcronyms Control area network Electronic Industries Association International Electrotechnical Commission Internet protocol National Fire Protection Association Subnetwork Manager D E IN-2 IN-3 IN-4