Cisco Systems 1500 Communication Channels

Chapter1 Product Overview

Communication Channels

1-2

Cisco Metro 1500 Series Hardware Installation Guide

78-10588-03

TheCisco Metro 1500 series operates using the International Telecommunication

Union (ITU) wavelength grid of 200-GHz channel spacing. It receivesthe signal

from the local deviceand 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 2.488 Gbps, and within a guaranteed optical budget.The

system is transparent to any data communication protocol except wavelength

channel modules (WCMs) with clock recovery. For more details on data rates,

optical budgets, and supported protocols, see Appendix A, “Specifications.”

The Cisco Metro 1500 series system also provides monitoring and service

functions such as loss of light and bit-rate control, as well as local and remote

loopback.

Communication Channels

DWDM technology allows different channels to be combined for transportation

over one fiber pair. A pair of multiplexer (MUX) and demultiplexer (DMX)

modules assemble the channels into four groups of up to eight channels. The band

splitter module (BSM) assembles and disassembles the four groups for the two

remote fibers.

The optional remote switch module (RSM) providesline protection to the system.

If the working line fails, the RSM routes the combined service automatically to a

backup line. If used, the RSM is installed only in the primary chassis.

Contents

Main CHAPTER Product Overview Product Description Communication Channels Figure 1-1 shows the multiplexer architecture. Figure 1-1 Multiplexer Architecture Primary and Extension Chassis Cisco Metro 1500 Series Hardware Installation Guide 78-10588-03 Chapter1 Product Overview Communication Channels Figure 1-2 Typical Cisco Metro1500 Series Conguration Ethernet cables Ethernet hub DC Input Uplink 6x 5x 4x 3x 2x 1x External bus cable Expansion Modules Power 1 Power 2 WCM RSM Figure 1-3 Primary Chassis NEMI DMX Figure 1-4 Extension Chassis A Figure 1-5 Extension Chassis B WCM BSM DMX Power 1 Power 2 Figure 1-7 shows the rear view of the primary chassis and extension chassis. 78-10588-03 Figure 1-6 Extension Chassis C WCM MUX DMX Power 1 Power 2 Page 16-Channel WCM System 32-Channel WCM System 128-Channel ESCON System Chassis Dimensions Labeling Page Airflow System Power Supply Module System Modules Wavelength Channel Modules Data Rate Transparent WCMs Data Rate Transparent Front Panel LEDs WCMs with Fixed Clock Recovery Clock Recovery Front Panel LEDs WCMs with Settable Clock Recovery Optical Connectors of the WCM Multiplexer and Demultiplexer Modules Chapter1 Product Overview System Modules Figure 1-10 MUX and DMX Locations Optical Connectors of the MUX and DMX Each MUX and DMX has up to 10 optical connectors: One input or output connector for each of up to eight WCMs installed in a chassis. One common input (D1 to D4 WCM chassis location), depending on the Band Splitter Module Optical Connectors of the BSM Remote Switch Module Page Figure 1-13 RSM Optical Connectors RSM Push Buttons and LEDs Three push buttons control the RSM. Table1-5 lists each push button and its function. Table1-5 RSM Push Button Descriptions Optical Connectors of the RSM Modes of Operation TDM4E Wavelength Channel Modules Page Page System Modules Figure 1-15 TDM4E Multiplexer Architecture RSM DMX TDM4E1 TDM4E2 Optical Connectors of the TDM4E On the front panel of the TDM4E there are 10 MiniSC type optical connectors: Figure 1-16 shows the optical connectors on the front panel of the TDM4E. Figure 1-16 Optical Connectors of the TDM4E TDM4E LEDs Page Network Element Management Interface Chapter1 Product Overview System Modules NEMI Location Placement POWER FAN Ch.1-8 32262 Figure 1-17 NEMI Location in the Primary Chassis and Extension Chassis B Figure 1-18 NEMI Front Panel NEMI LEDs Device Element Management Interface System Modules METRO 1500 POWER FAN 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 Ports MUX Ch.9-16 DMX DEMI LEDs Ethernet Hub