Battling the GlobalCrossing CallerID blues

As a part of my job, I manage and maintain customer platform – usually operating in the Calling Cards and VoIP services market. Over the course of time, I’ve learned to rely on some providers in this world, knowing that they work 99.999% of the time. For example, i like working with DID numbers provided […]

Read my words – 3500 concurrent channels with Asterisk!

One of the biggest questions in the world of Asterisk is: “How many concurrent channels can be sustained with an Asterisk server?” – while many had tried answering the question, the definitive answer still alludes us. Even the title of this post says “3500 concurrent channels with Asterisk” doesn’t really say much about what really […]

Open Source SBC – Is there such a thing?

Session Border Controllers (SBCs) are utilized as a means to providing both load balancing and security structures for VoIP networks. To be completely honest, 90% of my customers utilize SBC appliances, be it Acme Packet, Juniper, NexTone or others. According to a report by Transnesus, a combination of OpenSER and Asterisk can be utilized as […]

We are to blame…

Lately I’ve come to the realization, that we are to blame for our own inability to promote Open Source and the adaptation of Open Source proficiency. Being an Open Source evangelist and consultant, this is very weird to be said by one like myself, however, this is my realization – and I will explain. In […]

DTMF – Damned Tone Maker Fuckedup

To those of you familiar with the SIP signalling protocol or any other VoIP protocol for all that matter, you are most probably familiar with the issue of traversing DTMF (Dual Tone Multi Frequency) tones correctly over a VoIP link. The main issue is that there is no one standard for doing this. While in […]