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 […]

In an opinion handed down on June 1st, 2007 the US Court of Appeals responds to Vonage v. FCC (USF) in the matter of the required contributions to the Universal Service Fund.
Vonage has challenged a Federal Communications Commission order requiring the contribution to the Universal Service Fund (USF).
“Specifically, [Vonage] claims that, in requiring such […]

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 […]