iConverter Single-Fiber CWDM Multiplexers and Add/Drop

MUX/DEMUX and Optical Add/Drop Mux Modules


iConverter Single-Fiber CWDM/X

2 and 4 channels (wavelengths) multiplexer/demultiplexer modules

  • Scalable to 8 Channels using Band Splitter

iConverter Single-Fiber CWDM/AD

  • 1-Channel Optical Add and Drop Multiplexers modules
  • Add and Drop functions in both directions

Common Product Features

  • Protocol and rate transparent for applications up to 10Gbps
  • Minimal and uniform optical loss facilitates easy network planning
  • Industry standard LC connectors
  • Seamless integration with other iConverter media converters and chassis for multi-service platforms
  • Passive device that can be installed in a powered chassis for managed applications
  • Manageable via SNMPv1/v2c/v3, Telnet or serial console port
  • One (1) Year Warranty and Free 24/7 Technical Support


iConverter Single-Fiber Course Wave Division Multiplexing (CWDM) modules provide a flexible and cost effective solution for increasing fiber capacity over single fiber networks. CWDM over single-fiber increases network bandwidth capacity by enabling multiple wavelengths, or data channels that carry independent services over existing fiber infrastructure. Up to sixteen separate wavelengths can be transported on a single-fiber link with iConverter Single-Fiber CWDM modules.

Single-Fiber CWDM/X Multiplexer/Demultiplexer Modules

Single-Fiber iConverter CWDM/X modules are available in 2 and 4-Channel models, supporting a variety of wavelength combinations and port configurations.

The figure above shows a pair of 2-Channel, single-fiber CWDM/X units that operate using the 1550nm, 1570nm, 1590nm and 1610nm wavelengths. Note that each wavelength is unidirectional and only flows in one direction. The channel ports of iConverter CWDM/X model 8872 receive 1570nm and 1610nm, while the channel ports of model 8873 receive 1550nm and 1590nm.


Single-Fiber CWDM/AD Add & Drop Multiplexers

iConverter 1-Channel Single-Fiber CWDM/AD modules are Course Wave Division Multiplexing (CWDM) Optical Add and Drop Multiplexers (OADM). The CWDM/AD modules add (multiplex) and drop (de-multiplex) one channel on both directions of a CWDM single-fiber route. Nine standard models of the 1-Channel Single-Fiber CWDM/AD modules are available.

iConverter CWDM/AD modules add new access points anywhere on a single-fiber CWDM network, without impacting the remaining channels traversing the network. Access points can be added to linear, bus, and ring networks, where the dual-direction ring design provides redundant protected architecture.

The small and compact size of the iConverter CWDM/X and CWDM/AD modules yields one of the highest port densities in the industry. A 2U high 19-module iConverter chassis populated with modules can yield up to 120 wavelengths of capacity.

iConverter CWDM/X modules are passive devices that require no external power. They can also be installed in an iConverter powered chassis with a management module 1 and be managed using Omnitron’s NetOutlook® network management software, third-party SNMP software, Telnet or a serial console port.

The modules can be installed in any iConverter chassis equipped with other iConverter media converters and transponders to provide a multi-service platform capable of delivering Ethernet, TDM, SONET and other services across a CWDM fiber common link.

1 For complete management support, use a M2 series module (NMM2, GX/TM2, 2GXM2, 10/100M2, 2FXM2) or higher.

Two Networks on a Single-Fiber Protected Ring

The application below shows how the iConverter Single-Fiber CWDM/AD can enable protected path redundancy on a single-fiber ring.

Network A consists of two Fast Ethernet switches connected by two independent paths running Spanning Tree Protocol (STP). These switches are connected to the single-fiber ring using two 8878-55 iConverter Single-Fiber CWDM/AD modules. Both modules use 1550nm and 1570nm wavelengths. The 1550nm runs clockwise, and the 1570nm runs counterclockwise.

When the network is initialized, STP will choose an active path (segment) and a backup path (illustrated by the dotted line) for protection of the network. In the event of a fiber failure that interrupts the active path, both switches on Network A will switch paths and continue normal operation.

Network B consists of two Gigabit Ethernet switches connected by two independent paths, also running STP. Network B co-exists on the single-fiber ring in a separate CWDM channel, with no impact to Network A. Network B uses two 8878-59 iConverter Single-Fiber CWDM/AD modules. These modules use 1590nm and 1610nm wavelengths. Traffic on Network B is transparent to Network A. Both paths on Network B are also protected, and in the event of a fiber failure, both switches on Network B will switch paths and continue normal operation.

CWDM technology provides the flexibility to increase capacity of existing fiber infrastructure by enabling multiple channels (wavelengths) over the same fiber cabling. Each channel carries data independently from each other, allowing network designers to transport different data rates and protocols (T1, T3, Ethernet, Serial, etc) for different customers or applications.

The wavelengths used with CWDM implementations are defined by the International Telecommunications Union, reference ITU-T G.694.2, listing eighteen wavelengths from 1270nm to 1610nm with 20nm wavelength spacing.

ITU-T G.652 single-mode fiber optic cable is not optimized for CWDM applications due to the high attenuation around the water peak region centered at 1383nm (wavelengths between 1390nm and 1410nm). When using the 1390 and 1410 wavelengths, the water peak attenuation should be factored into the design before implementing.

* Note: The ITU standard specifies the exact center wavelength as 1271nm, 1291nm, 1311nm, etc. However, for clarity (and to comply with general industry conventions) this data sheet refers to these wavelengths as 1270nm, 1290nm, 1310nm, etc.

Model Type Single-Fiber CWDM/X MUX/DEMUX
Channels 2 Channel
  4 Channel
Options Optional Expansion port
Common Link Single-Fiber
Connectors LC (UPC)
Dimensions W: 0.85” x D: 4.5” x H:2.8"
Weight 12 oz.
Compliances UL, CE, FCC Class A
Power Requirements Not powered for non-managed applications
0.025A max @ 3.3VDC for managed applications
Temperature Standard: 0 to 70o C
Storage: -40 to 80o C
Humidity 5 to 95% (non-condensing)
Altitude -100m to 4,000m
MTBF (hrs) > 1,000,000 hrs
Model Type Single-Fiber CWDM/AD Add/Drop MUX
Channels 1 Channel
Common Link Single-Fiber
Connectors LC (UPC)
Dimensions W: 0.85” x D: 4.5” x H:2.8"
Weight 12 oz.
Compliances UL, CE, FCC Class A
Power Requirements Not powered for non-managed applications
0.025A max @ 3.3VDC for managed applications
Temperature Standard: 0 to 70o C
Storage: -40 to 80o C
Humidity 5 to 95% (non-condensing)
Altitude -100m to 4,000m
MTBF (hrs) > 1,000,000 hrs
Model TypeModel NumberChannel Port
ITU Center Wavelength (nm)
Insertion LossAdjacent
Channel Port Isolation
Channel Port Isolation
Return Loss (filtered channel)
2-Channel MUX/DEMUXs* 8870-0 1471/1491, 1511/1531 < 1.9dB > 30dB > 40dB > 45dB
8871-0 1491/1471, 1531/1511 <1.9dB > 30dB > 40dB > 45dB
8872-0 1551/1571, 1591/1611 <1.9dB > 30dB > 40dB > 45dB
8873-0 1571/1551, 1611/1591 <1.9dB > 30dB > 40dB > 45dB
4-Channel MUX/DEMUXs* 8874-0 1271/1291, 1311/1331, 1351/1371, 1431/1451 <2.4dB > 30dB > 40dB > 45dB
8875-0 1291/1271, 1331/1311, 1371/1351, 1451/1431 <2.4dB > 30dB > 40dB > 45dB
8876-0 1471/1491, 1511/1531, 1551/1571, 1591/1611 < 2.4dB > 30dB > 40dB > 45dB
8877-0 1491/1471, 1531/1511, 1571/1551, 1611/1591 < 2.4dB > 30dB > 40dB > 45dB
8878-XX See Table Below <1.9dB > 30dB > 40dB > 45dB

Consult factory for customized CWDM models
* Single-fiber CWDM/X models must be used in pairs. The Tx wavelengths on one end has to match the Rx wavelengths on the other.

Chassis and Mounting Options Ordering Table

(60 watts)
(120 watts)
One (1) Power Supply 8200-1 8201-1 8206-1 8205-1 8220-1 8226-1 8225-1 8230-0 8235-0 8240-1 8240-2
One (1) Power Supply with Dying Gasp Support - - - - - - - 8230-1 8235-1 8241-1 8241-2
Two (2) Power Supplies 8200-2 8201-2 8206-2 8205-2 8220-2 8226-2 8225-2 - - 8245-111* 8245-112*
Three (3) Power Supplies 8200-3 8201-3 8206-3 8205-3 - - - - - - -
Spare Power Supply 8200-9 8201-9 8206-9 8205-9 8220-9 8226-9 8225-9 - - - -
23" Rack Mounting Kit 8091-2 8091-2 8091-2 8091-2 8092-2 8092-2 8092-2 - - - -
Blank Module Panel 8090-0 8090-0 8090-0 8090-0 8090-0 8090-0 8090-0 8090-0 8090-0 - -
Wall Mounting Hardware Kit -   - - - - - 8249-0 8249-0 8249-0 8249-0
1U 19" Rack Mount Shelf - - - - - - - 8260-0 8260-0 8260-0 8260-0
DIN Rail Mounting Kit -   - - - - - - - 8250-0 8250-0

When ordering a Wide Temperature chassis, add a W to the end of the part number. For example:8230-1W
Consult factory for extended temperature (-40 to +75º C) models.
* Click on part number for complete ordering information on the 1-Slot Redundant Power Chassis with Power over Ethernet

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