Lantronix CWDM-CR-B Series User manual

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CWDM-xxxxxCR-B
Mux/Demux and Optical Add/Drop Multiplexer Modules
User Guide
Part Number 33794
Revision B November 2021

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Intellectual Property
© 2021 Lantronix, Inc. All rights reserved. No part of the contents of this publication may be transmitted
or reproduced in any form or by any means without the written permission of Lantronix.
Lantronix is a registered trademark of Lantronix, Inc. in the United States and other countries.
All other trademarks and trade names are the property of their respective holders.
Patented: https://www.lantronix.com/legal/patents/; additional patents pending.
Warranty
For details on the Lantronix warranty policy, please go to our web site at http://www.lantronix.com/support/warranty.
Contacts
Lantronix Corporate Headquarters
7535 Irvine Center Drive
Suite100
Irvine, CA 92618, USA
Toll Free: 800-526-8766
Phone: [phone]
Fax: [phone]
Technical Support
Phone: [phone] or 1.800.260.1312
Email: [e-mail]
Sales Offices
For a current list of our domestic and international sales offices, go to the Lantronix web site at
www.lantronix.com/about/contact.
Disclaimer
All information contained herein is provided “AS IS.” Lantronix undertakes no obligation to update the information in this
publication. Lantronix does not make, and specifically disclaims, all warranties of any kind (express, implied or otherwise)
regarding title, non-infringement, fitness, quality, accuracy, completeness, usefulness, suitability or performance of the
information provided herein. Lantronix shall have no liability whatsoever to any user for any damages, losses and causes
of action (whether in contract or in tort or otherwise) in connection with the user’s access or usage of any of the
information or content contained herein. The information and specifications contained in this document are subject to
change without notice.
Revision History
Date Rev Comments
6/26/19 A Initial release.
12/6/21 B Initial Lantronix re-brand.

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Table of Contents
Product Description................................................................................................................................................................. 4
Ordering Information ............................................................................................................................................................... 4
Optional Accessories (Sold Separately) ................................................................................................................................. 5
Product Views ......................................................................................................................................................................... 5
Connections ............................................................................................................................................................................ 6
Application Examples.............................................................................................................................................................. 6
CWDM-Add-Drop Mux Example:........................................................................................................................................ 7
CWDM-Mux-Demux Example:............................................................................................................................................ 8
CWDM Add/Drop Mux Connections........................................................................................................................................ 8
Unpacking ............................................................................................................................................................................... 9
Installation ............................................................................................................................................................................... 9
Safety Instructions for Rack Mount Installations................................................................................................................. 9
Front Panels .......................................................................................................................................................................... 12
Add/Drop Mux Front Panel ............................................................................................................................................... 12
CWDM Mux Front Panels ................................................................................................................................................. 12
Fiber Cable Handling & Installation....................................................................................................................................... 13
Handling Fiber Cables ...................................................................................................................................................... 13
Installing Fiber Cables ...................................................................................................................................................... 13
Theory of Operation .............................................................................................................................................................. 14
Coarse Wave Division Multiplexing .................................................................................................................................. 14
Optical Add/Drop Multiplexer (OADM).............................................................................................................................. 15
CWDM Wavelength-specific Optical Transceivers ........................................................................................................... 15
Technical Specifications........................................................................................................................................................ 16
Add/Drop Mux Specifications............................................................................................................................................ 16
CWDM Mux Specifications ............................................................................................................................................... 16
Troubleshooting .................................................................................................................................................................... 18

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Product Description
Lantronix CWDM products use a passive technology that allows for any protocol to be transported over the fiber
link, as long as it is at a specific wavelength. Lantronix CWDM Mux/Demux and Add/Drop Mux can provide a simple
and affordable method to maximize existing fiber capacity with little or no increased cost.
Passive optical CWDM devices utilize thin-film filter technology. They are available in various wavelength
combinations based on the entire wavelength spectrum (1270nm–1610nm in 20nm increments) defined by the
ITU-T G.694.2 CWDM standard. These CWDM devices are available in two main configurations:
Multiplexer/Demultiplexer (Mux/Demux) modules and Optical Add/Drop Multiplexer (OADM) modules.
Each module is a pluggable device that slides into a one rack unit (1RU) chassis that can hold two modules and
mount into a 19” equipment rack.
Ordering Information
#
Model
Description
CWDM-MXxxLCR-B Series
Coarse Wavelength Division Multiplexing (CWDM) Mux/Demux
1
CWDM-M551LCR-B
4 Channels + OSC,1510/1530/1550/1570nm, Duplex LC Mux/Demux
2
CWDM-M947LCR-B
8 Channels + OSC,1470-1610nm, Duplex LC Mux/Demux
3
CWDM-M1631LCR-B
16 Channels ,1310-1610nm, Duplex LC Mux/Demux
CWDM-A2A8xxLCR-B Series
Add/Drop Mux (CWDM); 1 Channel with E/W Lines
4
CWDM-A2A831LCR-B
1 Channel 1310nm port with E/W lines (wideband (+/- 50nm))
5
CWDM-A2A833LCR-B
1 Channel 1330nm port with E/W lines
6
CWDM-A2A835LCR-B
1 Channel 1350nm port with E/W lines
7
CWDM-A2A837LCR-B
1 Channel 1370nm port with E/W lines
8
CWDM-A2A839LCR-B
1 Channel 1390nm port with E/W lines
9
CWDM-A2A841LCR-B
1 Channel 1410nm port with E/W lines
10
CWDM-A2A843LCR-B
1 Channel 1430nm port with E/W lines
11
CWDM-A2A845LCR-B
1 Channel 1450nm port with E/W lines
12
CWDM-A2A847LCR-B
1 Channel 1470nm port with E/W lines
13
CWDM-A2A849LCR-B
1 Channel 1490nm port with E/W lines
14
CWDM-A2A851LCR-B
1 Channel 1510nm port with E/W lines
15
CWDM-A2A853LCR-B
1 Channel 1530nm port with E/W lines
16
CWDM-A2A855LCR-B
1 Channel 1550nm port with E/W lines
17
CWDM-A2A857LCR-B
1 Channel 1570nm port with E/W lines
18
CWDM-A2A859LCR-B
1 Channel 1590nm port with E/W lines
19
CWDM-A2A861LCR-B
1 Channel 1610nm port with E/W lines

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Optional Accessories (Sold Separately)
Model
Description
CWDM-MB19R2
19” Rack Mount chassis, 1RU High, holds 2 CWDM Modules
SFP Modules
Lantronix offers a full line of small form factor pluggable (SFP) modules.
See our SFP product webpage for more information.
Features
•Increase bandwidth on existing fiber infrastructure
•Alleviate fiber exhaustion
•Transmit multiple protocols over existing duplex fiber link by combining fiber outputs of multiple media converters
•Provide scalable bandwidth of up to 10 Gbps per channel over existing fiber links
•Plug-and-Play, no configuration of CWDM components
•Use existing standard optical ports on switches and routers (utilize Optical Line Converter as transponder)
Product Views
CWDM-A2A855LCR-B Add/Drop Mux (CWDM)
CWDM-M1631LCR-B (16-Ch. Mux/Demux)
CWDM-M551LCR-B (4-Ch. Mux/Demux)
CWDM-M947LCR-B (8-Ch. Mux/Demux)

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Connections
CWDM-xxxxxCR-B Mux/Demux Optical Add/Drop Multiplexer Modules
Figure 1: CWDM-xxxxxCR-B Mux/Demux and Optical Add/Drop Multiplexer Modules
Application Examples
The figure below shows an existing copper switch at a Central Office or Point-of-Presence (POP) converting the electrical
signal to the appropriate optical wavelength. The signals are then multiplexed together and sent across the fiber
infrastructure. At the remote side the signals are de-multiplexed and sent to the customer location.
Figure 2: CWDM-xxxxxCR-B Application Example

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CWDM-Add-Drop Mux Example:

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CWDM-Mux-Demux Example:
CWDM Add/Drop Mux Connections
The figure below shows Lantronix CWDM Mux/Demux & Add/Drop Mux modules. In the figure, λ1 indicates Lambda 1
(for one particular wavelength).

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Unpacking
Carefully unpack the CWDM-xxxxxCR-B. Verify that you have received:
•One CWDM-xxxxxCR-B
•One Documentation Postcard
•One printed Quick Start Guide, 33793
Please save the packaging for possible future use.
Installation
Safety Instructions for Rack Mount Installations
The instructions below (or similar) are intended for rackmount installation environments:
1. Elevated Operating Ambient Temperature: if installed in a closed or multi-unit rack assembly, the operating ambient
temperature of the rack environment may exceed room ambient. Install the equipment in an environment
compatible with the maximum ambient temperature (Tma) specified.
2. Reduced Air Flow: install the equipment in a rack so that the amount of air flow required for safe operation is not
compromised.
3. Mechanical Loading: Mount the equipment in the rack so that a hazardous condition does not occur due to uneven
mechanical loading (weight distribution/rack balance).
4. Circuit Overloading: give consideration to the connection of the equipment to the supply circuit and the effect that
overloading of the circuits might have on overcurrent protection and supply wiring. Consider all equipment
nameplate ratings when addressing this concern.
5. Reliable Earthing: maintain reliable earthing of rack-mounted equipment; pay particular attention to supply
connections other than direct connections to the branch circuit (e.g., use of power strips).

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Rack Mount Install Procedure
The CWDM modules install into the optional CWDM-MB19R2 Rack Mount chassis for installation in a free-standing rack.
To install the bracket and CWDM module into a rack, do the following:
1. Locate the CWDM module and bracket. See Figure 3.
Figure 3: Bracket and CWDM Module
2. Mount the Bracket to the equipment rack, using four screws as shown in Figure 4.
Figure 4: Bracket Installation
3. Pull the CWDM mounting plungers fully out, as shown in Figure 5.
4. Slide the CWDM module into one of the slots, as shown in Figure 5.
Figure 5: Slide CWDM Module into Front of Bracket

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5. Secure the CWDM module to the bracket, as shown in Figure 6.
Figure 6: CWDM Module Installation into Bracket

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Front Panels
Add/Drop Mux Front Panel
The Add/Drop Mux Front Panel is shown in Figure 7.
Figure 7: Add/Drop Mux Front Panel
CWDM Mux Front Panels
The CWDM modules have no LEDs as it does not require power. The front panels are shown in Figures 8a, 8b, and 8c.
Figure 8a: 4-Channel CWDM Mux Front Panel (CWDM-M551LCR-B)
Figure 8b: 8-Channel CWDM Mux Front Panel (CWDM-M947LCR-B)
Figure 8c: 16-Channel CWDM Mux Front Panel (CWDM-M1631LCR-B)

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Fiber Cable Handling & Installation
Handling Fiber Cables
Accurate and repeatable data transmissions require clean fiber-optic connections; therefore, inspect the ends of all
connectors for dust or imperfections. To achieve the best possible performance, follow these guidelines:
• To prevent damage, keep the connectors’ protective cover on when not in use.
• Use care in handling all fiber-optic connectors.
• Visually inspect fiber ends for signs of damage.
• Always clean and inspect fiber connectors prior to making a connection.
Installing Fiber Cables
To install the fiber cables, do the following:
1. Remove the protective cover from the port. See Figure 9.
Figure 9: LC Port and Dust Cover
2. Locate a 2-strand fiber cable with the appropriate male connectors installed on both ends.
3. Carefully insert the fiber cable into the CWDM and the device, as shown in Figure 10.
Figure 10: Fiber Cable Connections

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Theory of Operation
Coarse Wave Division Multiplexing
CWDM can be briefly described as a method of transmitting multiple signals over a fiber optic link using separate,
distinct wavelengths, based on the entire wavelength spectrum (1270nm – 1610nm in 20nm increments) defined by the
ITU-T G.694.2 CWDM standard. In general, CWDM components multiplex the optical signal outputs from ‘4’ or more
electronic devices. These signals are sent over a single optical fiber. The signals are then demultiplexed into separate,
distinct signals for input into electronic devices at the other end of the fiber optic link. See Figure 11.
Figure 11: Coarse Wave Division Multiplexing
Lantronix CWDM devices utilize thin-film filter technology. Since the CWDM devices are entirely passive, they can be
used in conjunction with lower-cost, noncooled laser sources. These CWDM devices are available in two main
configurations: Multiplexer/Demultiplexer (Mux/Demux) modules, and Optical Add/Drop Multiplexer (OADM) modules.

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Optical Add/Drop Multiplexer (OADM)
The optical add/drop multiplexer module provides the ability to add or drop a single wavelength or multi-wavelengths
from a fully multiplexed optical signal. This allows intermediate locations between remote sites to access the common,
point-to-point fiber segment linking them. Wavelengths that are not dropped pass through the OADM and continue in
the direction of the remote site. See Figure 12.
Figure 12: Add/Drop Module
CWDM Wavelength-specific Optical Transceivers
Lantronix full line of media converters and switches can incorporate CWDM wavelengths with the addition
of wavelength-specific small form-factor pluggable (SFP) optical transceivers or traditional fixed optical ports. CWDM
SFPs comply with ITU-T G.694.2 CWDM standard and are available for Fast Ethernet, Gigabit Ethernet, OC-3/STM-1,
OC-12/STM-4, and OC-48/STM-16 data rates. Fixed optical ports are available in Fast Ethernet and Gigabit Ethernet,
and in the same CWDM ITU wavelengths.

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Technical Specifications
Add/Drop Mux Specifications
Channel Wavelength ITU & ITU+1 (1260-1620nm)
Center Wavelength Accuracy +-0.5 (nm)
Channel Spacing 20 (nm)
Channel Passband bandwidth (nm) +-6.5 (nm)
Channel Ripple 0.3dB
Isolation Adjacent > 30dB
Non-Adjacent > 40dB
Insertion Loss Temperature Sensitivity <= 0.005dB/°C
Wavelength Temperature Shifting <0.002 nm/°C
Polarization Dependent Loss <0.1dB
Polarization Mode Dispersion <0.1 PS
Directivity >50dB
Return Loss >50 dB
Fiber Type Corning SM28E
Connector LC/PC
Mounting 19” Rack Mount
Dimensions (Unit) Width: 8.46” [215 mm] x Depth: 7.68” [195 mm] x Height: 1.24” [31.5 mm]
Dimensions (with Chassis) Width: 17.44” [443 mm] x Depth: 9.84” [250 mm] x Height: 1.73” [44 mm]
Operating Temperature: -20°C to +70°C
Storage Temperature: -40°C to +85°C
Weight 0.88 lbs [0.40 kg]
Warranty Lifetime
CWDM Mux Specifications
CWDM-M551LCR-B Specifications
Channel Wavelength ITU & ITU+1 (nm)
Center Wavelength Accuracy +-0.5 (nm)
Channel Spacing 20 (nm)
Channel Passband bandwidth (nm) +-6.5 (nm)
Insertion Loss with connector <= 1.6dB
Channel Ripple 0.3dB
Isolation Adjacent > 30dB
Non-Adjacent > 40dB
Insertion Loss Temperature Sensitivity <= 0.005dB/°C
Wavelength Temperature Shifting <0.002 nm/°C
Polarization Dependent Loss <0.1dB
Polarization Mode Dispersion <0.1 PS
Directivity >50dB
Return Loss >50 dB
Mounting 19” Rack Mount
Dimensions (Unit) Width: 8.46” [215 mm] x Depth: 7.68” [195 mm] x Height: 1.24” [31.5 mm]
Dimensions (with Chassis) Width: 17.44” [443 mm] x Depth: 9.84” [250 mm] x Height: 1.73” [44 mm]
Operating Temperature: -20°C to +70°C
Storage Temperature: -40°C to +85°C
Weight 0.88 lbs [0.40 kg]
Warranty Lifetime

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CWDM-M947LCR-B Specifications
Channel Wavelength ITU & ITU+1 (nm)
Center Wavelength Accuracy +-0.5 (nm)
Channel Spacing 20 (nm)
Channel Passband bandwidth (nm) +-6.5 (nm)
Insertion Loss with connector <= 2.5dB
Channel Ripple 0.3dB
Isolation Adjacent > 30dB
Non-Adjacent > 40dB
Insertion Loss Temperature Sensitivity <= 0.005dB/°C
Wavelength Temperature Shifting <0.002 nm/°C
Polarization Dependent Loss <0.1dB
Polarization Mode Dispersion <0.1 PS
Directivity >50dB
Return Loss >50 dB
Mounting 19” Rack Mount
Dimensions (Unit) Width: 8.46” [215 mm] x Depth: 7.68” [195 mm] x Height: 1.24” [31.5 mm]
Dimensions (with Chassis) Width: 17.44” [443 mm] x Depth: 9.84” [250 mm] x Height: 1.73” [44 mm]
Operating Temperature: -20°C to +70°C
Storage Temperature: -40°C to +85°C
Weight 0.9 lbs [0.41 kg]
Warranty Lifetime
CWDM-M1631LCR-B Specifications
Channel Wavelength ITU & ITU+1 (nm)
Center Wavelength Accuracy +-0.5 (nm)
Channel Spacing 20 (nm)
Channel Passband bandwidth (nm) +-6.5 (nm)
Insertion Loss with connector <= 3.2dB
Channel Ripple 0.3dB
Isolation Adjacent > 30dB
Non-Adjacent > 40dB
Insertion Loss Temperature Sensitivity <= 0.005dB/°C
Wavelength Temperature Shifting <0.002 nm/°C
Polarization Dependent Loss <0.1dB
Polarization Mode Dispersion <0.1 PS
Directivity >50dB
Return Loss >50 dB
Mounting 19” Rack Mount
Dimensions (Unit) Width: 8.46” [215 mm] x Depth: 7.68” [195 mm] x Height: 1.24” [31.5 mm]
Dimensions (with Chassis) Width: 17.44” [443 mm] x Depth: 9.84” [250 mm] x Height: 1.73” [44 mm]
Operating Temperature: -20°C to +70°C
Storage Temperature: -40°C to +85°C
Weight 1 lb [0.46 kg]
Warranty Lifetime

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Troubleshooting
1. Make sure the fiber connectors are clean; see theFOA.org termination cleaning webpage.
2. Make sure your model supports the feature or function attempted; see Ordering Information on page 4.
3. Verify the install process; see Installation on page 9.
4. Troubleshoot connected network devices to pinpoint the problem to the switch. See the related documentation.
5. When calculating optical loss, ensure that the total loss, plus a safety factor (typically 3dB) does not exceed the
optical power budget (the difference between the transmitter optical output power and the receiver’s optical
sensitivity). See the equipment manufacturers’ documentation for the transmitter optical output power and receiver
optical sensitivity values.
6. See the FOA.org Testing & Troubleshooting Fiber Optic Systems webpage.
7. Record device information and Contact Tech Support.

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Lantronix Corporate Headquarters
7535 Irvine Center Drive
Suite100
Irvine, CA 92618, USA
Toll Free: 800-526-8766
Phone: [phone]
Fax: [phone]
Technical Support
Online: http://www.transition.com/support.
Sales Offices
For a current list of our domestic and international sales offices, go to the Lantronix web site at
www.lantronix.com/about/contact.