Open Optical & Packet Transport

Our goal is to accelerate innovation in optical and IP networks and ultimately help operators provide better connectivity for communities all around the world.

Open Optical & Packet Transport

The Open Optical & Packet Transport group is a project group within Telecom Infra Project that works on the definition of open technologies, architectures and interfaces in Optical and IP Networking.

The project is an engineering-focused effort led by major operators, technology vendors and research institutions. It concentrates on different parts of the Transport network architecture, including optical transponders, line systems, IP access devices, open APIs and network simulation and planning tools.

Open Optical & Packet Transport

Group Structure

The Open Optical & Packet Transport project group is currently divided into five different subgroups, focusing on different parts of the stack.

Co-Chaired by Hans-Juergen Schmidtke (Facebook)
Co-Chaired by Victor Lopez (Telefónica)

Disaggregated Cell Site Gateways (DCSG)

Led by Eva Rossi (Vodafone) and Luis MartinGarcia (Facebook)

This group works on the definition of open and disaggregated whitebox cell site gateway devices that operators can deploy in their current 2G/3G/4G cell sites, as well as in the upcoming 5G deployments. The team produces technical specifications that define software, hardware and API requirements that represent the needs of mobile network operators and also works with industry partners to develop devices that meet the specifications.

Physical Simulation Environment (PSE)

Led by Gert Grammel (Juniper) and Gabriele Galimberti (Cisco)

This group represents the first industry-wide effort to develop an open-source multi-vendor tool for optical network planning. The tool is in active development and with it, operators will no longer have to depend on their suppliers to plan routes and network capacity, but will have an independent way to lay out their requirements and simulate network conditions. Project group members — including Cisco, Facebook, Juniper, Microsoft, Orange, Politecnico di Torino and Telia Company — have made great contributions to build this tool.

Converged Architectures for Network Disaggregation & Integration (CANDI)

Led by Hirotaka Yoshioka (NTT) and Oscar González de Dios (Telefónica)

This group focused in defining operator use cases in open converged packet and optical networks. Also, prove that use cases can be met with architectures based on open technologies and finally leverage the opportunity provided by TIP to involve different players to accelerate technical developments and help operators in real-world scenarios.

Controls, Information Models & APIs (CIMA)

Led by Alan Gibbemeyer (Acacia), Harald Bock (Infinera), and Stephan Neidlinger (Adva)

The focus of this group is to drive practical, multi-vendor implementations supporting operator-driven open optical use cases Define a recommended set of control architectures, information models and APIs to enable focused implementation efforts and progress toward real-world deployment.

Disaggregated Optical Systems (DOS)

Led by José Antonio Gómez (Vodafone), Hideki Nishizawa (NTT), and Johan Hjortas (Telia Company)

This group focuses on defining a build open and disaggregated Optical devices and taking them to market.

Highlighted Technologies


DCSG is a 1RU fully-featured cell site router with a wide range of Ethernet connectivity options for client and network sides. As a cell site gateway, DCSG supports Layer-2, Layer-3 and MPLS features – with native time synchronization protocols such as IEEE-1588 v2 and Synchronous Ethernet for the mobile base stations.

For more information:


Industry’s first open and disaggregated converged packet/optical transponder. Voyager was an original design contributed by Facebook that is now being evolved and taken to market by Adva Optical, running software from Cumulus Networks.


A new open packet/optical transponder contributed by Edge-core. Cassini integrates 100GbE switching with Layer-1 optical transport functions as line-card modules, and covers data center interconnect, metro and access backhaul use cases.

For more information, download our Cassini at a glance PDF.


An open-source library for building route planning and optimization tools for real-world multi-vendor optical networks. GNPy is a community effort participated in by partners such as Orange, Microsoft, Telia Carrier, Cisco, Juniper, Politecnico di Torino and Facebook.

Recent News

TIP at OFC 2019: Collaboration with ONF, OOPT Project Group Updates

March 5, 2019

Following a successful Mobile World Congress (MWC) in Barcelona, where Vodafone, Telefónica, and TIM Brazil announced the results of their Requests For Information (RFI) on Disaggregated Cell Site Gateways (DCSG) technology, the OOPT team is excited to attend The Optical Networking and Communication Conference & Exhibition (OFC) in San Diego, California. We hope you are as excited about the DCSG RFI results as we are from MWC. Here is another opportunity to connect with us and learn about the work we have been doing around the optical technologies.

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DCSG: RFI Results Announced and New Partners Onboard!

February 26, 2019

In October 2018 during the TIP Summit in London, we announced the release of the Disaggregated Cell Site Gateway (DCSG) technical specification, spearheaded by four global mobile operators and that three of them – Vodafone, Telefonica, and TIM Brasil – issued an RFI, inviting hardware and software suppliers to provide detailed information on their engineering assets, capabilities, and intention to adopt and build solutions conforming to the DCSG specification.

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Driving Openness in Optical Networks: Update from OOPT Project Group

November 8, 2017

Working together within TIP, the OOPT project group has made great progress. We’re excited to see openness take hold across the entire industry, which is driving more collaboration and innovation across all aspects of the network. Before discussing the exciting developments happening within the project group, we wanted to give a brief overview of how the industry is rapidly changing to embrace open and disaggregated systems.

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Four Major Operators Collaborate through the Telecom Infra Project to Disaggregate Cell Site Technology

October 16, 2018 Vodafone, Telefonica, Orange, and TIM Brazil define the next generation of open, disaggregated and interoperable devices for cell sites. Four major, global telecoms operators have collaborated through the Telecom Infra Project (TIP) to define the next-generation of a critical device within the mobile network which connects the equipment that serves people’s phones to the rest of the operator network, the Disaggregated Cell Site Gateway.

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Key Software, Device and Component Vendors in the Telecom Infra Project Create Industry-First Standard Software Interface for Optical Modules and Systems

October 16, 2018

Device, component and software vendors work together to create an industry-first interface for optical modules to allow fast integration of elements in disaggregated optical systems.

Disaggregation is a trend on the rise that speeds up innovations by breaking a technology into smaller discrete pieces that different companies can independently work on in parallel. This brings flexibility to choose the best technology for each piece at any point in time, but also requires integrating all the components into a final product.

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The New Transport Network: From Open Transponders to Disaggregated Cell Site Gateways

October 17, 2018

What a year 2018 has been for the Open Optical Packet Transport (OOPT) group! We are truly excited to share the results the group has delivered on several key initiatives, bringing its vision of unbundling IP and optical networks. Since the formation of the OOPT group, several leading operators, supplier partners, and technologists have come together to collaborate on key initiatives to enable more open and disaggregated network infrastructure, and providing more flexibility and a wider range of technological choices to build and operate telecom networks.

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Stay In The Know

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Events & Talks

Past Events

March 3-7, 2019

San Diego Convention Center
San Diego, CA

OFC Conference and Exhibition 2019

OOPT will be presenting the work around optical technologies – both hardware and software, as well as use cases and APIs. Check out the presentations and demos information here.

Open Platform Summit: Will Disaggregation Drive Core Network Deployments in 2025?

  • Open Source Software and White Box Hardware Driving Optical Network Disaggregation Andrea Campanella (ONF)
  • The Open and Disaggregated Networks Powering the Microsoft Cloud Mark Filer (Microsoft)
  • White Box as a Next Generation Transport Platform? Akira Hirano (NTT)
  • Opening up Long Distance Optical Networks: Pros, Cons, and Caveats Scott Mountford (AT&T)
  • Opportunities and Challenges of Disaggregation in Subsea Networks Tim Stuch (Facebook)

Session: The Disaggregated Transport Network

Presented by Víctor López (Telefónica), Gert Grammel (Juniper Networks), Jay Gill (Infinera), Hirotaka Yoshioka (NTT)

Session: The New Transport Network

Presented by Vittorio Curri (Politecnico di Torino), Scott Emery (Cumulus Networks), Wataru Ishida (NTT Electronics America), Hans-Juergen Schmidtke (Facebook)

October 16-17, 2018

ExCel Centre
London, UK

TIP Summit ’18

OOPT attended TIP Summit, in October in London, with several presentations and demos.

September 24, 2018

Fiera Roma
Rome, Italy

The ECOC Exhibition 2018

OOPT was present at ECOC, in September in Rome, with several presentations and demos.

March 11-15, 2018

San Diego Convention Center
San Diego, CA

OCF Conference 2018

Physical Simulation Environment
Presented by Presented by Gert Grammel, Juniper; Vittorio Curri, Politecnico di Torino; Jean-Luc Auge, Orange;

The Telecom Infra Project (TIP)
Presented by Hans-Juergen Schmidtke, Facebook

Opening Up the Transport Infrastructure
Presented by Luis MartinGarcia, Facebook

TIP-PSE: Planning Open Optical Line Systems
Presented by Gert Grammel, Juniper, USA; and Stefan Melin, Telia, Sweden

Towards a Route Planning Tool for Open Optical Networks in the Telecom Infrastructure Project
Presented by Brian Taylor and Gilad Goldfarb, Facebook; Saumil Bandyopadhyay; MIT, Vittorio Curri, Politecnico di Torino; Hans-Juergen Schmidtke, Facebook;

Role of Standards in Web-Scale Data centers
Presented by Mark Filer, Brad Booth, David Bragg, Microsoft

The Role of Open-Source Network Optimization Software in the SDN/NFV World
Presented by Pablo Pavon-Marino, Universidad Politécnica de Cartagena, Spain


Hans-Juergen Schmidtke, Director of Engineering, Facebook

Open Optical Packet Transport – PSE

Spotlight Session

Open Optical Packet Transport: CANDI

Spotlight presentation

Open Optical Packet Transport – TAI

Spotlight Session

Open Optical Packet Transport: DCSG

Spotlight Panel Session

Open Optical Packet Transport Update – Panel Discussion

Hans-Juergen Schmidtke, Facebook (Moderator); Philippe Lucas, Orange; Joao Gabriel Alexio, TIM Brasil; Gabriel Jaime Vivares, InterNexa S.A; George Tchaparian, Accton Group; Josh Leslie, Cumulus Networks

Open Optical Packet Transport: Driving Openness into the Optical Network

Hans-Juergen Schmidtke, Director of Engineering, Facebook

How to Participate

If you share our vision and goal of accelerating innovation in optical and IP networks, join us! To do so, just register as a member of our parent organization, Telecom Infra Project (TIP) and, during the application process, select the Open Optical & Packet Transport Project Group from the list of Project Group options.