Welcome to the Smartvox Knowledgebase


Smartvox is a Limited company established in 2004 and registered in the UK. Our main focus is the design and provision of OpenSIPS solutions for ITSP’s. We can provide solutions based on OpenSIPS and rtpengine to secure your network-edge without having to pay crazy prices for a commercial SBC.

We provide outstanding expertise in this field and have extensive experience of SIP and all versions of OpenSIPS up to v2.4. This is complemented by familiarity with Asterisk, Kamailio, MySQL, Teams, fail2ban, Docker, Pacemaker, Homer, FreeSWITCH, LetsEncrypt, iptables, etc. We have experience developing bespoke scripts, mostly using bash, and are happy working on various Linux distros. Our range of test facilities includes cloud-based SIP servers and automated utilities to generate or receive traffic.

The articles you will find on this web-based knowledgebase are original material derived from the results of internal research projects, almost entirely self funded. If you find the material useful, please use the “Like” buttons on each article to show your appreciation. There is a Facebook Like button at the start of each article and an internal “Like” counter at the end.

Smartvox is a small consultancy business providing a one-to-one friendly service. You are welcome to call and speak to me, John, to discuss your IP Telephony requirements. We can provide assistance with any of the following:

  • Consultancy for all OpenSIPS projects (configuration – system/network integration – test)
  • Design and setup of secure/resilient solutions for Internet Telephony Service Providers
  • Problem debugging assistance and Solution integration with fail2ban, rtpengine, etc

Get in touch to discuss your requirements РSmartvox Contact Details or call +44 1727 221221
Please note, John is retiring at the end of 2020 so we are unable to take on any new large projects.

The technical articles on this site are aimed at VoIP professionals and other users of open source VoIP products. They are organised in categories for ease of navigation. Use the Category headings shown on the right or the tabs along the top of the page to find the information of interest to you. Please also use the like button at the end of each article to show your appreciation – or leave a comment. Your feedback is most welcome.

Stay safe in these strange times.

John Quick, Smartvox Limited, August 2020.