Open Secure Telephony or OSTel¶

Welcome to the public documentation portal for all things related to open source secure voice and video calling for mobile and desktop. OSTel is a public service in a larger network called OSTN (Open Secure Telephony Network). Please contribute to this document!

User Support email support@guardianproject.info

Server operator email support https://lists.mayfirst.org/mailman/admin/ostn-operators

IRC irc.freenode.net #guardianproject

Client Documentation¶

Server Documentation¶

Build Instructions¶

Inter-domain calling¶

World Wide Coverage Reports¶

Get Involved¶

Open Secure Telephony Network (OSTN) Standard¶

Standards Documentation¶