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Project Clearwater is backed by Metaswitch Networks. We have discontinued active support for this project as of 1st December 2019. The mailing list archive is available in GitHub. All of the documentation and source code remains available for the community in GitHub. Metaswitch’s Clearwater Core product, built on Project Clearwater, remains an active and successful commercial offering. Please contact for more information. Note – this email is for commercial contacts with Metaswitch. We are no longer offering support for Project Clearwater via this contact.

Ellis Provisioning Server

This project contains the Clearwater provisioning server, named Ellis after Ellis Island. It provides a web GUI and underlying HTTP API for user and line creation, number allocation, and configuration of iFCs and call services.


Ellis contains the user database and the pool of numbers that can be allocated. It does not contain per-line configuration - it stores all this directly in Homestead and Homer, accessing them over their defined HTTP APIs.

Ellis is mainly written in Python. It uses Tornado for HTTP and MySQL as the underlying database. virtualenv is used to manage dependencies. The build system creates a Debian package, but the code can also be run directly.

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