iConverter® Multimode CWDM/X

4 and 8 Channel Multimode Multiplexer/Demultiplexer

Omnitron’s iConverter Multimode CWDM/X Multiplexer/Demultiplexer modules support are protocol and rate transparent allowing different services up to 10Gbps to be transported across the same multimode fiber link.


  • 4 and 8 channels (wavelengths) multiplexer/ demultiplexer modules for OM1 multimode fiber
  • Protocol transparent to combine individual wavelengths for services ranging from Ethernet, EPON, Fibre Channel, TDM and other protocols
  • Compact iConverter form factor yields one of the highest port densities in the industry
  • 10Gbps rates supported per wavelength
  • Minimal and uniform optical loss facilitates predictable network planning and efficient use of optical power budget
  • Seamless integration with other iConverter media converters and chassis for multi-service applications
  • Industry standard LC connectors
  • Compatible with LGXchassis using the iConverter LGX Adapter
  • Commercial (0 to 50°C) and wide (-40 to 60°C) temperature ranges
  • Made in the USA
  • One (1) Year Warranty and Free 24/7 Technical Support


The iConverter Multimode CWDM/X 4 and 8 Channel Coarse Wave Division Multiplexing (CWDM) Multiplexer and Demultiplexer plug-in modules increase in the capacity of existing multimode fiber networks. Multimode multiplexers are ideal for in-buildings or campuses where regulatory or economical limitations make it difficult to replace existing multimode fiber.

iConverter Multimode CWDM/X multiplexers are protocol and rate transparent, allowing Ethernet, Fibre Channel, SDH/SONET, and other services up to 10Gbps each to be transported across the same multimode fiber link. The CWDM/X Multimode modules support ITU-T G.694.2 standard CWDM wavelengths between 1270nm to 1610nm in 20nm increments.

iConverter Multimode CWDM/X modules are passive devices that require no external power. They can be installed in any iConverter chassis with iConverter media converters and transponders to enable connectivity between existing equipment and CWDM multiplexers.

The small and compact size of the Multimode CWDM/X modules yields one of the highest port densities in the industry. Using the 2U high iConverter compact chassis, 38 CWDM/X multimode modules can be installed, providing up to 684 connectors or up to 608 simplex channels or 304 duplex channels.



The application diagram below illustrates how transponders and Multimode CWDM/X multiplexers are used to expand the capacity of OM1 multimode fiber. The existing fiber is currently at capacity with two switches connected via multimode fiber (Before). Additional data channels are required between Location A and Location B, and additional switches are deployed (After). Multimode CWDM/X multiplexers will be used to increase the capacity of the expanded infrastructure.

The switches have fixed fiber multimode ports, so iConverter xFF transponders are used to convert the standard multimode wavelengths to CWDM single-mode wavelengths. Mode conditioning cables are used connect the transponder to the Multimode CWDM/X multiplexer.

The Multimode CWDM/X multiplexer multiplexes and demultiplexes the four data channels over the multimode CWDM common fiber between Location A and Location B.

The iConverter xFF transponders and 4-Channel Multimode CWDM/X multiplexer are installed in a high-density 19-module chassis. The Gigabit Ethernet traffic from the fiber switches is converted from standard 850 wavelengths to four CWDM wavelengths. Each CWDM SFP supports a wavelength that matches the appropriate channel port wavelength on the CWDM/X module and is connected to the CWDM/X module with mode conditioning cables.

NOTE: If the existing switches support SFP fiber transceivers, then CWDM SFPs can be installed in the switches and connected directly to the Multimode CWDM/X multiplexer with mode conditioning cables.

Before and After Diagram


 iConverter CWDM/X
 4 and 8 Channel Mulitmode Multiplexer/Demultiplexer
Regulatory Compliances
Port Types
4 or 8 Channels: LC (UPC)
Cable Types
Multimode: 62.5/125μm (OM1)
Channel Ports: Dual Fiber
Common Port: Dual Fiber
DC Power Requirements
DC Input 
3.3VDC, 0.025A @ 3.3VDC
(when management is required, otherwise passive operation)
W x D x H
0.85” x 4.5” x 2.8” (21.6 mm x 114.3 mm x 71.1 mm)
12 oz. (340.2 grams)
    0 to 50°C
 -40 to 60°C
 -40 to 80°C
 5% to 95% (non-condensing)
 -100m to 4,000m (operational)
MTBF (hrs)
> 1,000,000
One (1) year warranty with 24/7/365 free Technical Support


 Optical Characteristics
Common Port Operating Wavelength
nm 1270 - 1610
CWDM Center Channel nm

1271, 1291, 1311, 1331, 1351, 1371, 1431, 1451, 1431, 1451, 1471, 1491, 1511, 1531, 1551, 1571, 1591, 1611

CWDM Channel Spacing nm 20
4-Channel Insertion Loss dB < 1.8
8-Channel Insertion Loss dB < 2.3
Adjacent Channel Isolation dB > 30
Non-Adjacent Channel Isolation
dB > 40
Return Loss (filtered channel) dB > 20




Model NumberModel TypeChannel Port
ITU Center Wavelengths (nm)
8861-901t 4-Channel Multimode Lower Band MUX/DEMUX with LC UPC Connectors 1271, 1291, 1311, 1331
8861-900t 4-Channel Multimode Upper Band MUX/DEMUX with LC UPC Connectors 1511, 1531, 1551, 1571
8863-901t 8-Channel Multimode Lower Band MUX/DEMUX with LC UPC Connectors 1271, 1291, 1311, 1331, 1351, 1371, 1431, 1451
8863-900t 8-Channel Multimode Upper Band MUX/DEMUX with LC UPC Connectors 1471, 1491, 1511, 1531, 1551, 1571, 1591, 1611
Base Model Number: 88xx-xt
Select the model from ordering table above.
Add operating temperature range (t) to the model type selected.
Operating Temperature Options (t):
<leave blank> = Commercial temperature (0 to 50°C) W = Wide temperature (-40 to 60°C)
Contact Omnitron for other port configurations, extended temperature (-40 to 75°C) and RoHS (5/6) compliant models.
See chassis and mounting options at: iConverter Chassis and Mounting Option web page

 CWDM Symbols