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The Optical Transport Network (OTN) defined in ITU-T G.709 is the default networking protocol that underpins today’s metro, regional and long-haul Dense Wavelength Division Multiplexing (DWDM) packet-optical transport networks. Two generations of OTN have already been widely deployed: OTN 1.0, which was based on 10G WDM transport; and OTN 2.0, which enabled the transition to Coherent 100G Metro OTN switched networks and is the de facto standard in transport networks today. OTN has proven to be extremely flexible for accommodating new client signals and line rates. It offers the highest network reliability, providing 50 ms protection against any number of failures and deterministic service isolation capable of supporting the strictest Service Level Agreements (SLAs).

A transition to next-generation OTN is needed to scale the optical transport infrastructure to meet the unprecedented growth in bandwidth requirements. OTN 3.0 introduces flexible, “beyond 100G” (B100G) optical transport capabilities, coupled with support for new services like 25GbE, 50GbE, 200GbE, 400GbE and Flexible Ethernet. While there will be an enduring market need for OTN 2.0, packet optical transport networks will require OTN 3.0 to address another wave of growth in network traffic.

Our OTN processors and OTN physical layers (PHYs) offer leading innovation, integration and power for Data Center Interconnect (DCI) networks. They deliver the quickest time to market and lowest R&D expense for the OEM and minimize the total cost of ownership for the service provider.

We also offer a comprehensive portfolio of optical networking solutions for Synchronous Optical Networking/Synchronous Digital Hierarchy (SONET/SDH), T1/E1 and Fiber-to-the-Home/Passive Optical Network (FTTH/PON) protocols.

Multi-Service OTN Processors

Our portfolio of the industry's most integrated OTN processors features our award-winning DIGI family of devices. These OTN processors deliver optimized power and footprints that uniquely address the requirements of DWDM transponders and muxponders, switchponders, OTN switching platforms, DCI and OTN mobile fronthaul architectures.

Key Features:

  • Support for 10GE, 25GE, 50GE, 100GE, 200GE, 400GE, FlexE and FlexO interfaces
  • Low per-port power consumption
  • Flexible high-performing SerDes up to 56G PAM-4
  • Glueless interfacing to OTN switches, Ethernet switches, packet processors and cross-connects


To extend OTN to the router, our multi-rate OTN PHYs enable a single management layer between optical transport and routing networks, resulting in lower operating costs and improved service availability for network operators.

Key Features:

  • Tri-Mode FEC at 10G and 40G OTN rates
  • Enable universal OTN/Ethernet router ports
  • Ultra-low latency OTN encryption for secure cloud connectivity
  • Low per-port power consumption
  • Enable router line card capacities of 1 Tbps and higher

OTN Mobile Fronthaul Solutions


DIGI Mobile Fronthaul Solution

  • Optimized for CPRI Option 5 and 7 into 100G OTU4
  • Supports CPRI, 10GE, 25GE, 40GE and 100GE
  • Supports optional link security
  • Based on PM5990 DIGI-G4 and PM5980 DIGI-100GX

HyPHY Mobile Fronthaul Solution


We offer a complete portfolio of SONET/SDH framers, ADM-on-a-Chip, and a family of SONET/SDH switching elements. These products enable you to design and deploy low-power, low-chip-count architectures suited for metro-access, aggregation and core SONET/SDH optical networking.

  • SONET/SDH PHYs and interface chips
  • Single-chip add/drop multiplexors
  • High-order cross-connects
  • Low-order cross-connects
  • Narrowband cross-connects
  • Tributary processors
  • T1/E1 LIUs and framers

Fiber-To-The-Home (FTTH) SoCs

We provide broadband fiber access SoCs with interoperable end-to-end solutions for all Passive Optical Network (PON) protocols.

Check our secure data sheet portal for more information on the following:

  • Ethernet Passive Network (EPON) devices
  • Gigabit Passive Optical Network (GPON) devices
  • Network processors

Optical Networking Products

View All Parametrics
Product Description Max Bandwidth (Gbps) Max SERDES Rates (Gbps) OTN Line Rates
PM5420 HyPHY-20G OTN Processor 40 11 OTU2
PM5426 HyPHY-10G OTN Processor 20 11 OTU2
PM5440 DIGI-120G OTN Processor 240 11 OTU2/OTU3/OTU4
PM5441 DIGI-60G OTN Processor 120 28 OTU2/OTU3
PM5450 HyPHY-20Gflex OTN Processor 40 11 OTU2
PM5451 HyPHY-AXS OTN Processor 40 11 OTU2
PM5456 HyPHY-10Gflex OTN Processor 20 11 OTU2
PM5980 DIGI-100GX OTN Processor 200 28 OTU2/OTU3/OTU4
PM5981 DIGI-100GX OTN Processor (without encryption) 200 28 OTU2/OTU3/OTU4
PM5990 DIGI-G4 OTN Processor Family 800 28 OTU2/OTU3/OTU4
PM5991 DIGI-G4 OTN Processor (without encryption) 800 28 OTU2/OTU3/OTU4
PM6010 DIGI-G5 OTN Processor Family 1200 56 OTU2/OTU4/OTUCn
PM6011 DIGI-G5 OTN Processor (without encryption) 1200 56 OTU2/OTU4/OTUCn
View All Parametrics
Product Max Bandwidth (Gbps) Description Max SERDES Rates (Gbps) OTN Line Rates
PM5442 120 META-120G OTN/Ethernet PHY 11 OTU2/OTU3/OTU4
PM5984 120 META-120GX OTN/Ethernet PHY 28 OTU2/OTU3/OTU4
PM5985 120 META-120GX OTN/Ethernet PHY (without encryption) 28 OTU2/OTU3/OTU4
PM5992 240 META-240G OTN/Ethernet PHY 28 OTU2/OTU3/OTU4
PM5993 240 META-240G OTN/Ethernet PHY (without encryption) 28 OTU2/OTU3/OTU4
View All Parametrics
Product Status Documents Packages
PM4329 In Production http://www.microchip.com/wwwproducts/PM4329/documents/ 276\BBGA
PM4351 In Production http://www.microchip.com/wwwproducts/PM4351/documents/ 80\MQFP
PM4358 In Production http://www.microchip.com/wwwproducts/PM4358/documents/ 256\LBGA
PM5309 In Production http://www.microchip.com/wwwproducts/PM5309/documents/ 500\BBGA
PM5319 In Production http://www.microchip.com/wwwproducts/PM5319/documents/ 196\LBGA
PM5326 In Production http://www.microchip.com/wwwproducts/PM5326/documents/ 1292\BBGA
PM5329 In Production http://www.microchip.com/wwwproducts/PM5329/documents/
PM5336 In Production http://www.microchip.com/wwwproducts/PM5336/documents/ 1152\BBGA
PM5337 In Production http://www.microchip.com/wwwproducts/PM5337/documents/ 896\BBGA
PM5369 In Production http://www.microchip.com/wwwproducts/PM5369/documents/ 672\BBGA
PM5370 In Production http://www.microchip.com/wwwproducts/PM5370/documents/ 672\BBGA
PM5377 In Production http://www.microchip.com/wwwproducts/PM5377/documents/ 1152\BBGA
PM5384 In Production http://www.microchip.com/wwwproducts/PM5384/documents/ 196\LBGA
PM8310 In Production http://www.microchip.com/wwwproducts/PM8310/documents/ 896\HBBGA
PM8318 In Production http://www.microchip.com/wwwproducts/PM8318/documents/ 480\BBGA

White Paper

Title Download
OTN 3.0 Poster Download
The Need for OTN in Data Center Interconnect (DCI) Transport White Paper Download
Microsemi Optical Transport Networking (OTN) Processors: ECI and Microsemi Partnership Case Study Download
DIGI-G4 and DIGI-G5 White Paper: Enabling Pay-as-You-Grow Layer-1 Private Line Services for the Enterprise Cloud Download
Enabling Converged 4G and 5G Mobile Fronthaul Download
The Evolution of ITU-T G.709 Optical Transport Networks (OTN) Beyond 100Gbit/s Download
Benefits of OTN in Transport SDN Download
In-flight Encryption in Service Provider Networks Download
Making 100G OTN Economical: OTN Switching & Packet-Optical Transport Download
Enabling OTN Switching over Packet/Cell Fabrics Download