About

This service is a public testbed of the Open Secure Telephony Network (OSTN) project, with the goal of promoting the use of free, open protocols, standards and software, to power end-to-end secure voice communications on mobile devices, as well as with desktop computers.

This service is in public beta. Calls placed throug the system are encrypted and authenticated between peers. It is continually being tested and improved to ensure the best possible security. Logging is minimal and work is being done to ensure no unecessary IP addresses are stored on disk. We encourage you to build your own OSTN server with our cookbook.

Download

The Ostel.me Android app is based upon the open-source CSipSimple app, which utilizes the pjsip and ZRTP4PJ libraries to provide transport and media encryption and verification. Scan this code or download the APK directly Instructions to configure the app are in the activation email and on the wiki