C H A P T E R 1 Product Overview This chapter describes the Cisco Metro 1500 series metropolitan area network (MAN) dense wavelength division multiplexing (DWDM) system, and includes the following sections: • Product Description, page 1-1 • Communication Channels, page 1-2 • Chassis, page 1-11 • System Modules, page 1-15 Product Description The Cisco Metro 1500 series system is a high-performance, wavelength division multiplexer that provides bidirectional data communication.
Chapter 1 Product Overview Communication Channels The Cisco Metro 1500 series operates using the International Telecommunication Union (ITU) wavelength grid of 200-GHz channel spacing. It receives the signal from the local device and converts it to the desired wavelength. Only single-mode fibers (remote or trunk fibers) are used for multiplexed data transmission. The Cisco Metro 1500 series system provides communication within a broad range of data rates, up to 2.
Chapter 1 Product Overview Communication Channels Figure 1-1 shows the multiplexer architecture.
Chapter 1 Product Overview Communication Channels Primary and Extension Chassis The Cisco Metro 1500 series system has a modular structure so you can expand the system while it is in use. Adding or removing channels does not affect the other working channels. Figure 1-2 shows a typical Cisco Metro 1500 series system configuration containing a primary chassis and three extension chassis.
Chapter 1 Product Overview Communication Channels Figure 1-2 Typical Cisco Metro 1500 Series Configuration Ethernet cables Ethernet hub DC Input NEMI master Uplink 6x 5x 4x 3x METRO 1500 SERIES 2x 1x OK FAIL POWER Power MUX DMX 1-8(32) 1-8(32) on Serial On/Err Loop L/R L/T R/R R/T Primary chassis: WCM 1-8 On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop
Chapter 1 Product Overview Communication Channels Expansion Modules The Cisco Metro 1500 series system requires two identical WCMs to complete a full communications link, one at each end of the link. Each system unit includes a primary chassis (see Figure 1-3) that holds up to eight WCMs. The WCMs transport up to eight independent channels.
Chapter 1 Product Overview Communication Channels Figure 1-4 Extension Chassis A WCM MUX DMX BSM Power 1 Power 2 DEMI METRO 1500 SERIES POWER Power BSM MUX DMX 1-8(32) 1-8(32) on On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T L/R L/R L/R L/R L/R L/R L/R L/R L/T L/T L/T L/T L/T L/T L/T L/T FAN P
Chapter 1 Product Overview Communication Channels Figure 1-6 Extension Chassis C DMX WCM MUX DEMI Power 1 METRO 1500 SERIES Power 2 OK FAIL POWER Power MUX DMX 1-8(32) 1-8(32) on On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T L/R L/R L/R L/R L/R L/R L/R L/T L/T L/T L/T L/T L/T L/T L/T R/R R/R
Chapter 1 Product Overview Communication Channels Figure 1-7 Rear View of the Chassis Fan module Fuse 2 Voltage: Max. Current: Power Consumption: Fuse: Power 1 Fuse 1 115/230 V 50/60 Hz 2.5 A max. 100W 2x T2.5A / 250V For continued protection against risk of fire replace only with same type and ratings of fuse. For proper selection of power supply cord refer to instruction manual. Always remove both power cords when disMade in Germany connecting from power March 1998 source 1.
Chapter 1 Product Overview Communication Channels Each WCM has fiber-optic cables attached to its front panel. The remote lines of each WCM are connected to the MUX and DMX of the chassis. The common input and output connections of MUXs and DMXs (M1 to M4/D1 to D4) are connected to the BSM (M1 to M4/D1 to D4) in extension chassis A. For more information on the MUX/DMX modules, see the “Multiplexer and Demultiplexer Modules” section on page 1-22.
Chapter 1 Product Overview Chassis frames constitutes a single unified network element with a unique Ethernet address. For more details, refer to the Cisco Metro 1500 Series Software Configuration Guide. Chassis Each chassis of the Cisco Metro 1500 series can be mounted in a 19-inch cabinet or in open racks. Each chassis requires five rack units. The chassis houses all of the system modules required to achieve the optical communications link.
Chapter 1 Product Overview Chassis Figure 1-8 Outer Dimensions of the Housing 440 mm 482 mm 305 mm 32270 222 mm Labeling A label at the back of the unit identifies the system. Each WCM, RSM, and NEMI have unique serial numbers and specification codes printed on the front panels of the modules. WCMs are labeled with alphanumeric and pictographic descriptions of their main properties. Table 1-1 provides descriptions of the WCM labels.
Chapter 1 Product Overview Chassis Table 1-1 WCM Labels Main Properties Specification WCM with clock recovery. The clock recovery is fixed to a single frequency as indicated below the symbol. 622 Mbps WCM with clock recovery. The clock recovery can be set to three frequencies. These frequencies are shown above and below the symbol. 200 Mbps 125, 155 Mbps 1250 Mbps Transparent WCM without clock recovery ranging from 100 to 1250 Mbps. 100 Mbps Local port description of WCM.
Chapter 1 Product Overview Chassis Airflow System The airflow system includes an air intake at the bottom front side of the chassis and a fan module with two fans at the rear of the chassis. Two redundant power supplies power the fan module. The chassis internal air temperature controls the rotational speed of the fans. The state of the fan module can either be observed through the NEMI-master or it can be read off the fan LEDs at the front side of the chassis.
Chapter 1 Product Overview System Modules System Modules The Cisco Metro 1500 series system is a modular system, in which modules can be added or exchanged during operation. You can adjust the system unit to meet your application requirements. Purchasing a chassis that is not fully populated with modules allows you to upgrade the system at a later time.
Chapter 1 Product Overview System Modules Wavelength Channel Modules Table 1-2 lists the seven WCMs that are available for the Cisco Metro 1500 series system, their part numbers, and their maximum remote receiver (R/R) input power in decibels per milliwatt (dBm).
Chapter 1 Product Overview System Modules The status of receivers and transmitters can be observed locally with SNMP-based network management tools. In addition, the front panel LEDs provide information on the operating status. Refer to the Cisco Metro 1500 Series Software Configuration Guide for more information about this feature. For service purposes, data can be looped. The loop function is switchable using the network management tools.
Chapter 1 Product Overview System Modules Data Rate Transparent Front Panel LEDs The WCM LEDs provide information about its operating status. Table 1-3 describes the LEDs. Table 1-3 Transparent WCM LED Descriptions Label Color1 Description On/Err Green Power is on. No software or hardware errors are detected. Red A hardware or software error was detected or the initialization is in progress (during system startup only). Red blinking WCM is in manual setting mode (not shown in case of error).
Chapter 1 Product Overview System Modules Only signals with the designated data rate can be transmitted within a guaranteed optical budget. Clock Recovery Front Panel LEDs The WCM LEDs provide information about its operating status. Table 1-4 describes the LEDs. Table 1-4 Clock Recovery WCM LED Descriptions Label Color1 Description On/Err Green Power is on. No software or hardware errors are detected.
Chapter 1 Product Overview System Modules Optical data that is sent by the module on the remote side enters the remote receiver of the local system through the DMX. The data is then electrically transmitted to the local transmitter, which delivers the optical data.
Chapter 1 Product Overview System Modules Optical Connectors of the WCM Four optical connectors are located on the front panel of the WCM: • One local Rx connector (L/R) for local signal input • One local Tx connector (L/T) for local signal output • One remote Rx connector (R/R) for remote signal input • One remote Tx connector (R/T) for remote signal output Use MiniSC connectors, also called MUPC connectors.
Chapter 1 Product Overview System Modules Figure 1-9 Optical Connectors of a WCM 2500 Mbps Mbps On/Err Loop L/R L/T R/R R/T Ch1 R2.0 L1310 M R1538.1 S Ch1 R2.0 L1310 M R1538.1 S Local receiver connector L/R Local transmitter connector L/T Remote receiver connector R/R Remote transmitter connector 39351 R/T Multiplexer and Demultiplexer Modules The Cisco Metro 1500 series system uses DWDM technology to convert channels of optical communication into separate wavelengths of the ITU-T grid.
Chapter 1 Product Overview System Modules Figure 1-10 MUX and DMX Locations MUX DMX METRO 1500 SERIES OK FAIL POWER Power MUX DMX 1-8(32) 1-8(32) on Serial On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err Loop L/R L/T R/R R/T On/Err On Loop A L/R L/T R/R R/T Lk B LkA LkB Auto OK FAIL FAN Power on Power Error Err.Int.BUS Err.Ext.
Chapter 1 Product Overview System Modules Figure 1-11 Primary Chassis MUX and DMX Connectors Common transmitter output DMX 1-8(32) nc D1 8 8 7 6 6 5 4 4 3 2 2 1 Unused connector Common receiver input WCM8 receiver output WCM7 receiver output WCM6 receiver output WCM5 receiver output WCM4 receiver output WCM3 receiver output WCM2 receiver output WCM1 receiver output 39349 Unused connector WCM8 transmitter input WCM7 transmitter input WCM6 transmitter input WCM5 transmitter input WCM4 transmit
Chapter 1 Product Overview System Modules The BSM is installed in chassis A to avoid service interruption on upgrading the unit to more than 16-channel WCM or 8-channel TDM4E, respectively. This also means that if you only have the primary chassis, you need a chassis A to install a BSM.
Chapter 1 Product Overview System Modules Figure 1-12 Optical Connectors of the BSM in a 32-Channel WCM System BSM Common transmitter output Common receiver input M D Chassis 1 transmitter input Wavelength band from WCMs 1-8 M1 D1 Chassis 2 transmitter input Wavelength band from WCMs 9-16 M2 D2 Chassis 2 receiver output Wavelength band from WCMs 9-16 Chassis 3 transmitter input Wavelength band from WCMs 17-24 M3 D3 Chassis 3 receiver output Wavelength band from WCMs 17-24 Chassis 4 trans
Chapter 1 Product Overview System Modules 50 ms. After switching, the former backup line, now the active line, operates as the standard line and the broken line becomes the backup line. The RSM does not switch back when the backup line recovers. The RSM can be controlled locally with push buttons at the front panel and remotely using the network element management interface (NEMI) and network management software.
Chapter 1 Product Overview System Modules Figure 1-13 RSM Optical Connectors Push buttons On A Lock line A Lock line B Automatic mode Lk B LkA LkB Auto Connectors A/T A/R Line A transmitter output Line A receiver input B/T B/R Line B transmitter output Line B receiver input M D Common transmitter intput 39350 Common receiver output RSM Push Buttons and LEDs Three push buttons control the RSM. Table 1-5 lists each push button and its function.
Chapter 1 Product Overview System Modules Four LEDs indicate the status of the RSM. Table 1-6 describes these LEDs. Table 1-6 RSM LED Descriptions Label Color Description On Power is on. No error is detected. Green Red, A hardware error is detected. continuous A B Lk Red, blinking Loss of signal is detected on both remote lines of the RSM. Both remote lines are broken or a hardware error is detected. Green Line A is active. Green, blinking Line A is inactive.
Chapter 1 Product Overview System Modules Table 1-7 RSM Optical Connector Descriptions (continued) Label1 Description B/T Line B transmitter B/R Line B receiver D Transmitter output to the BSM M Receiver input from BSM 1. All connectors are of the MiniSC type. Modes of Operation The RSM supports two operation modes: automatic mode and lock mode. Automatic mode is the normal mode that enables the switching function of the RSM. The lock mode is used for line testing and for servicing purposes.
Chapter 1 Product Overview System Modules If line B is the active line and you lock the RSM on line B, no switching takes place. The communication is locked on line B. Any automatic switching to the backup line (line A) is stopped. If line B is the active line and you lock the RSM to line A, the RSM checks the accessibility of line A. If line A is functional, the RSM switches the communication to line A and holds the communication on this line.
Chapter 1 Product Overview System Modules Note ESCON (Enterprise System Connection) is an IBM registered trademark. Each TDM4E contains four submodules (or interfaces) that guarantee optical receiving and transmission. These optical ESCON interfaces are connected to the MUX/DMX unit on the main board of the TDM4E. The MUX/DMX modules electrically multiplex and demultiplex asynchronously up to four ESCON channels to one optical channel for transmission.
Chapter 1 Product Overview System Modules All TDM4Es can be replaced or added at any time during operation of the system. Setting up a communication link requires a pair of fully identical TDM4Es. Up to four channels of optical communication of the TDM4E are converted to separate wavelengths of the ITU-T grid for DWDM. The multiplexer module (MUX) combines the optical signals into a combined signal for transportation using one single-mode fiber to the optional remote switch module (RSM).
Chapter 1 Product Overview System Modules Figure 1-15 TDM4E Multiplexer Architecture CH5 CH6 CH7 CH8 CH9 CH10 CH11 CH12 CH13 CH14 CH15 CH16 CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8 CH9 CH10 CH11 CH12 CH13 CH14 CH15 CH16 TDM4E1 1 TDM4E2 MUX 2 TDM4E3 3 TDM4E4 RSM 4 Transmission fiber lines TDM4E1 1 Receiving fiber lines TDM4E2 DMX 2 TDM4E3 3 TDM4E4 4 47262 CH1 CH2 CH3 CH4 Cisco Metro 1500 Series Hardware Installation Guide 1-34 78-10588-03
Chapter 1 Product Overview System Modules Optical Connectors of the TDM4E On the front panel of the TDM4E there are 10 MiniSC type optical connectors: • Four local Rx connectors (L/R) for local signal input • Four local Tx connectors (L/T) for local signal output • One remote Rx connector (R/R) for remote signal input • One remote Tx connector (R/T) for remote signal output Figure 1-16 shows the optical connectors on the front panel of the TDM4E.
Chapter 1 Product Overview System Modules TDM4E LEDs TheTDM4E LEDs provide information about its operating status. The Gigabit Ethernet connection is typically equipped on the remote receiver side with a fixed clock rate of 1250 mbit/s. A complete loss of optical signal on the remote receiver causes the remote laser to automatically shut down. Table 1-8 describes the functions of each LED.
Chapter 1 Product Overview System Modules Table 1-8 Label LR1 TDM4E LED Descriptions (continued) Color Description Solid green Data is received from a local port. Data rate matches clock frequency. Local port is enabled. Blinking green Blinking yellow Data is received from a local port. Data rate does not match clock frequency and the local clock is unlocked. Local port is disabled. LT4 Green Data is transmitted to a local port. LT3 Green Data is transmitted to a local port.
Chapter 1 Product Overview System Modules The TDM4E channel modules are double width. A maximum of four modules can be placed in one chassis. Network Element Management Interface The NEMI is a two-slot plug-in module that can be configured by software to be either a NEMI-master or a NEMI-slave. The NEMI resides in the following chassis: in the primary chassis (Figures 2-3 and 2-4), chassis B (Figure 2-6), chassis D, and chassis F. This interface provides status and configuration capabilities.
Chapter 1 Product Overview System Modules NEMI Location Placement The physical location of the NEMI module (either master or slave) in the chassis is the same. See Figure 1-17. Figure 1-17 NEMI Location in the Primary Chassis and Extension Chassis B NEMI master METRO 1500 SERIES OK FAIL POWER OK FAIL FAN 110/220V AC 110/220V AC Serial MUX Ch.
Chapter 1 Product Overview System Modules Figure 1-18 NEMI Front Panel Serial Serial port Power Error Err.Int.BUS Err.Ext.
Chapter 1 Product Overview System Modules NEMI LEDs Table 1-9 describes the functions of the LEDs shown in Figure 1-18. Table 1-9 NEMI LED Descriptions LED Color Description Power Green Power is on. Error Red An error is occurring. Err. Int. BUS Red An error on the internal bus is occurring. Err. Ext. BUS Red An error on the external bus is occurring. Receive Blinking green Link is active; traffic is on the network. Link Green Link is established.
Chapter 1 Product Overview System Modules The DEMI module in extension chassis A connects to the NEMI-master module in the primary chassis. The DEMI module in extension chassis C connects to the NEMI-slave module in extension chassis B. DEMI Location Placement The physical location of the DEMI module is shown in Figure 1-19. Figure 1-19 DEMI Placement in an Extension Chassis DEMI location METRO 1500 SERIES OK FAIL POWER 110/220V AC 110/220V AC MUX Ch.
Chapter 1 Product Overview System Modules Figure 1-20 shows the front panel of the DEMI. Figure 1-20 DEMI Front Panel On Err Bus interconnect ports BUS 1 32263 BUS 2 DEMI LEDs Table 1-10 describes the functions of the LEDs shown in Figure 1-20. Table 1-10 DEMI LED Descriptions LED Color Description On Green DEMI is on. Err Red An error is occurring. For more information about DEMIs, refer to the Cisco Metro 1500 Series Software Configuration Guide.
Chapter 1 Product Overview System Modules Ethernet Hub An Ethernet hub is necessary in systems consisting of more than two chassis. The hub is used to connect two or more NEMIs with each other and the Network Management System (NMS). It allows network management from a single point in the network.