I am once again dealing with yet another so-called major carrier that when they cannot determine a reason for a call failure they blame the fact that our SIP signaling has two Via Headers.
However, it is my understanding from RFC 3261, that multiple Via headers are allowed and should not even be a […]

If you are new to the world of playing with SIP servers, you may not realize there are two different variations of the same basic platform. I have previously published an OpenSER tutorial however there is another SIP server called SER.
In September of 2001 Andrei Pelinescu at the Fraunhofer Fokus research institute in […]

If you are just getting started with VoIP, you have found the right blog. I am committed to providing relevant content to anyone that finds it.
I have an on going series called How To Configure Asterisk. This first article in this series walks you through a typical first installation […]

With the recent growing popularity of VoIP, it has gotten far easier for you to run your own SIP server. There are many different open-source software packages that you can download and run at your home or office.
Today I am going to discuss two solutions that you can download and have your own SIP Server […]

Many are now reporting the abrupt closing of SunRocket yesterday at the close of business.
I am calling for SunRocket to do the right thing and inform those that are inquiring about the procedure to ‘unlock’ SunRocket VoIP Adapters. This way previous SunRocket customers can easily take their business elsewhere.
However, if SunRocket refuses there is […]

OpenSER is a flexible, mature and stable SIP communications server. However unlike Asterisk, OpenSER requires extensive knowledge of the SIP Protocol and presumes nothing about your configuration or method of deployment.
I am basing this configuration on OpenSER v1.1.1 which is currently considered the most ’stable’ version. Although v1.2 has been released, I am going […]

Deploying your first Asterisk system can be a frustrating task, espcially if you attempt to utilize the more advanced features and functions of Asterisk without having a solid foundation of the basic concepts. This article will walk you through the process of downloading, compiling and configuring your first instance of Asterisk that will allow […]

On Feb 22nd, 2007 subscribers of the OpenSER users mailing list were informed that a SER/OpenSER Configuration generator is now available.
This is an excellent tool for those looking to quickly configure OpenSER v1.1.1 for their own VoIP Services. Currently his configuration generator supports basic routing, far-end NAT traversal using either rtpproxy or mediaproxy and […]