Cisco Analog Optics | Prisma II Optical Receivers | Cisco Prisma II Hybrid


Headend Optics

Headend Optics

The Headend Optics product family comprises a large and solid portfolio of optical products used in HFC applications. Considering that the optical network keeps getting closer to the end user, it is imperative to have a robust product portfolio that supports the heavy load of data and video deployed by cable operators, as well as manufacturer interoperability and compatibility with previous analog optics. 

 Cisco’s Prisma II product family is the most deployed and reliable platform in the industry, by providing a future proof, dense, easy to operate and efficient variety of optical products to grow and support the demands of modern cable operations. 

 Digicomm International has been a Cisco Partner for over two decades. Our engineering team is trained to design the most complex scenarios in HFC deployments, moreover, we can support the implementation process of such networks and provide training on installation, operation and maintenance of the headend optical components. Learn more about our Engineering Services.

Digicomm International also carries a large stock of Cisco Prisma II equipment, ready to be shipped. Please contact us for more information. 

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Prisma II Optical Receivers

Cisco Prisma II Dual Reverse Optical Receivers 300 MHz

The Prisma II Dual Reverse Optical Receiver modules are available in the half-height high-density form factor. 

The modules contain two independent reverse optical receivers and two RF output ports. A single module occupies one slot in a Prisma II XD chassis. Two such modules can be vertically stacked in an associated Prisma II host module that occupies a single-wide slot in the Prisma II standard chassis. Up to 26 Prisma II Dual Reverse Receiver 300 MHz modules can operate in a standard 6RU chassis, while up to 16 Prisma Dual Reverse Receiver modules 300 MHz can operate in the 3RU Prisma II XD chassis. 

The ability to mix high-density receivers with other Prisma II modules in the same chassis greatly enhances the flexibility of the platform. Prisma II Dual Reverse Optical Receiver 300 MHz modules are available in two versions: standard input level and low input level. 

Data Sheet: Cisco Prisma II Dual Reverse Optical Receivers 300MHz

Cisco Prisma II Forward Optical Receivers

The High Density Forward Receiver (HDRx-F) module is primarily used to receive signals fed from a narrowcast (QAM) optical transmitter. Two HDRx-F modules can be vertically stacked in an associated Host Module which occupies a single wide slot in the Prisma II chassis. Up to 26 HDRX-F modules can operate in a standard 6RU chassis*. The ability to mix high density receivers with other Prisma II modules in the same chassis greatly enhances the flexibility of the platform. The Full Height Single Forward Receiver module may be used to receive signals from either a broadcast optical transmitter or a narrowcast (QAM) optical transmitter. It contains a single forward optical receiver with one RF output port and occupies a single wide slot in the Prisma II chassis


Cisco Prisma II Hybrid QAM Transmitter

The Cisco Prisma II Hybrid QAM Transmitter (HQT) offers superior MER complete with 4k QAM and Orthogonal Frequency Division Multiplexing (OFDM) capabilities.

Data Sheet: Cisco Prisma II Hybrid QAM Transmitter

Cisco Prisma II SuperQAM 1.2 Transmitter

 The Cisco Prisma II SuperQAM 1.2 transmitter offers increased bandwidth and uses existing directly-modulated QAM transmitter designs to support DOCSIS® 3.1 networks. This transmitter combines the enhanced channel carrying capacity of the Prisma II 1-GHz SuperQAM Full Spectrum transmitter with the narrowcast support in multi-wavelength systems inherent in the original Prisma II 1-GHz SuperQAM transmitter to provide unprecedented performance in a directly modulated transmitter.

Data Sheet: Cisco Prisma II SuperQAM 1.2 Transmitter

Cisco Prisma II 1310 nm 1.2 GHz Transmitter

The 1310 nm high-density transmitters (HDTx) are designed for use in the standard Prisma II or the Prisma II XD chassis containing standard power supplies and fan trays. The ability to mix high-density transmitter modules with other Prisma II modules in the same chassis greatly enhances the flexibility of the platform. Up to 26 transmitters can operate in a standard 6-rack-unit (6RU) Prisma II chassis, effectively doubling the density for 1310 nm transmitters in that chassis. Up to 16 HDTx modules fit in the Prisma II XD chassis for even higher density. The transmitters have a 1.2 GHz passband to permit the inclusion of high-order modulation types consistent with DOCSIS 3.1 advances. Microprocessor control allows ease of installation and flexibility of application. The transmitters are offered in two performance levels and a range of output powers from 3 to 15 dBm.

Data Sheet: Cisco Prisma II 1310 nm 1.2 GHz Transmitter

Cisco Prisma II 1.2 GHz High Density Long Reach Multiwave Transmitter:

The Cisco® Prisma® II 1.2 GHz High Density Long Reach Multiwave (HD-LRMW) Transmitter is the CATV industry’s first monolithic hybrid optical source module. Based on quaternary indium phosphide semiconductors, it separates the functions of light generation from RF modulation. The result is a smaller size, lower cost, narrow linewidth component providing performance more often associated with discrete external modulator technologies. Longer distance transmission without the linearity degradation of directly modulated sources is possible, expanding the capabilities of dense wavelength division multiplexed (DWDM) optical links to facilitate best-in-class architectures with unprecedented versatility and flexibility. Consistent with other Prisma II transmitters, the HD-LRMW offers 1.2 GHz of RF spectrum and transports a multiplex of analog, quadrature amplitude modulation (QAM), and orthogonal frequency division multiplexed (OFDM) channels with unmatched performance for node segmentation, fiber reclamation, and fiber deep architectures. The features, characteristics, and value position this transmitter to address the broadest range of applications in the fluid broadband access market.

Data Sheet: Cisco Prisma II 1.2 GHz High Density Long Reach Multiwave Transmitter

Chassis and Accessories

Chassis and Accessories

In optical transmission systems, the network platform forms the foundation of the product family. The Cisco® Prisma® II platform provides network operators with the unique features that enable the deployment of a carrier class-type network. Advanced features such as high usable module density, broad operating temperature range for field deployment without environmental controls, and a unique design optimized for easy module insertion, setup, and administration make the Prisma II platform the key to increased network reliability, scalability, and more cost-effective deployments.  


  • 1 GHz capable 
  • High usable module density (up to 13 modules per chassis) 
  • Operating temperature range suitable for outdoor field deployment 
  • Solid metal construction 
  • Low power consumption 
  • Superior heat dissipation and air circulation 
  • Front access and rear access chassis available 
  • Technician-friendly design with easy module insertion and removal, setup, and administration 
  • High-speed passive backplane to support migration to digital transmission 
  • technologies such as Cisco’s BDR Digital Reverse System 
  • Excellent fiber, powering, and RF cable management 
  • Advanced SNMP-oriented network monitoring and control over multiple network interfaces 
  • Multiple connector and powering options 
  • User-friendly alarm setup 
  • Master / Slave Redundant switching between modules 
  • Supports Web Browser and Command Line Interface (CLI) 

Digicomm International has an extensive experience working with the Prisma II optical platform, we not only carry a large inventory of Prisma II products, but we also have the expertise and knowledge to design, configure and help you deploy the most complex optical system. Our team of experts can also provide training if needed. Please contact us to receive more information. 

Data Sheet: Cisco Prisma Chassis



The High Density (HD) Erbium Doped Fiber Amplifier (EDFA) is designed to fit into a Prisma XD chassis or a standard full height Prisma II chassis (with the use of a host module). Up to two HD EDFA modules can be populated into a host module which requires a single service slot in the Prisma II chassis. The gain-flattened EDFA incorporates an optical filter to eliminate variations in gain across the C-band. 


  • EDFA modules for optical amplification 
  • High density design allowing up to 16 EDFAs in a Prisma II XD chassis or up to 24 in a full height Prisma II chassis with redundant power supplies 
  • Energy-efficient design with low power consumption 
  • EDFA modules have constant power or constant gain modes of operation 
  • Master/Slave redundancy using Controller Area Network with no external wiring needed 
  • Multiple setup and control options 
  • Local Control via Local Craft Interface (LCI) 
  • Local monitoring via Intelligent Communications Interface Module (ICIM) 

Data Sheet: Prisma High-Density Gain-Flattened EDFA


Cisco EDR 85 System: Modules for Cisco GainMaker and GS7000

The Cisco EDR 85 System includes EDR Transmitter modules that install in GainMaker and GS7000 Nodes, and companion Cisco Prisma® high-density (HD) EDR PRX85 Receiver modules that install in a Prisma II or Prisma II XD chassis at the headend or hub. The transmitter and receiver use Small Form Factor Pluggable (SFP) optical pluggable modules (OPMs) for enhanced flexibility. The Cisco EDR 85 System operates over the 5-85 MHz range and supports all standard reverse frequency bandwidths at 40, 42, 55, 65, and 85 MHz. 


  •    High-performance digital reverse technology:
    • 12-bit encoding that enables transmission of analog video in the reverse band
    • High-order digital modulation signals (for example,16 quadrature amplitude modulation [QAM], 64 QAM, and 256 QAM) 
  •    Multiple operating modes in the EDR receiver that support the EDR transmitter and the older integrated 2:1bdrnode transmitter 
  •    Optical pluggable modules that provide flexible inventory management
  •    Long-reach transmission capabilities that eliminate the need for optical amplifiers, reducing cost and space requirements
  •    Capability to send 90 individual 5-85 MHz reverse signals over a single fiber:
    • Use of 2:1 multiplexing to reduce fiber usage
    • Compatibility with Cisco’s 45-wavelength DWDM system 
  •    Support for independent balancing of reverse traffic at EDR receiver RF ports
  •    Simplified setup that reduces installation time and expertise requirements
  •    Distance- and temperature-independent link performance that simplifies engineering and maintenance requirements
  •    Space-saving, high-density deployment in Prisma II or Prisma II XD chassis to increase deployment cost-efficiency
  •    Optional monitoring of node (GS7000) and transmitter (GS7000 andGainMaker) parameters available at the receiver