Most Voip Library

The MOST-Voip Library is a fast and lightweight library created for handling VOIP sessions.

Main features:

  • Sip Account creation and registration on a remote Sip Server (e.g Asterisk)
  • Sip Call handling (making, holding, unholding, answering incoming calls)
  • Buddies Subscription and Real Time Presence Notification

Supported platforms:

  • Mobile: Android
  • Desktop: Linux Ubuntu

So far, MOST-Voip for desktop platforms has been tested only on Linux Ubuntu v.14.04 distribution. However, it is written in Python 2.7, so other platforms should be supported as well.


Most-Voip Library is based on PJSIP 2.2.1 library. So, first of all, you have to install PJSip, by performing the following steps:

  1. Download the last svn revision from (revision 4818 works well). (tar.gz and zip archives don’t compile!)
  2. ./configure CFLAGS=’-fPIC’
  3. make dep
  4. make
  5. sudo make install
  6. cd pjsip-apps/src/python/
  7. sudo python install

If you intend to use Most-Voip on the Android platform, you also have to build Pjsip for Android, as explained here

Get the latest release from GitHub:


Project MOST - Moving Outcomes to Standard Telemedicine Practice

Copyright 2014, CRS4 srl. (

Dual licensed under the MIT or GPL Version 2 licenses.
See license-GPLv2.txt or license-MIT.txt



Detailed Dual Licensing Info

The MOST-Voip API is licensed under both General Public License (GPL) version 2 and the MIT licence. In practical sense, this means:

  • if you are developing Open Source Software (OSS) based on MOST-Voip, chances are you will be able to use MOST-Voip under GPL. Note that the Most-Voip Library depends on the PJSIP API, so please double check here for OSS license compatibility with GPL.
  • alternatively, you can release your application under MIT licence, provided that you have followed the guidelines of the PJSIP licence explained here.

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