Tag Archives: Session Border Controller

The VPN is Dead…

My job used to be a place I went to.  If my car broke down, I didn’t work.   If the roads were too icy to drive on, I didn’t work.  If I had to stay home waiting for a repair person, I didn’t work.  I suppose I could have sat down with a pad of […]

Nine Good Reasons to Own a Session Border Controller

SIP has been around since the late 1990’s, but confusion still exists about what it exactly is and what it can do. Most telephony people understand that SIP changes the way we make voice and video calls, but their understanding is often sketchy. The confusion surrounding SIP is often greatest when it comes to the […]

SIP Security at Converge2015

When you think about security in terms of SIP and VoIP, you need to consider four different areas.  First, you want to protect the SIP signaling.  Second, you need to protect the media stream.  Third, you need to ensure that people are who they say they are.  Lastly, you need to create a secure network […]

A Practical Look at DTMF and RFC 2833/4733

It’s easy to get lost in the technological babble of our industry. We are awash in acronyms, product names, standards (real and pseudo), protocols, and vendor specific terminology. I can’t tell you how many times I thought I was hearing something new only to realize it was just another way of expressing an old idea. […]

Enterprise Connect Revisited

“Time is the longest distance between two places.” Tennessee Williams Time is a curious thing. Enterprise Connect 2015 ended only a short time ago and yet it already feels like the distant past. It doesn’t help that I’ve done about a million things since leaving Orlando, but even so, it wasn’t that long ago, was […]

Multiple Registration and Call Forking With SIP

In legacy telephony, everything revolves around hardware. There is the telephone receiver you hold in your hand and the buttons you press to make calls. The telephone is connected back to a central brain by one or more dedicated wires. Those wires eventually connect the telephone to a line card that feeds signals into a […]

The Fine Art of Choosing the Right SBC

I wear many different hats during the day, but the one that pays most of the bills is that of “The SIP Guy.” While I can’t take credit for coming up with SIP (that honor goes to Henning Schulzrinne and Mark Handley), I did start working with it early on and co-developed a SIP stack […]

A Necessary Guide to the Avaya traceSBC Utility

A few months ago, I wrote what has become the most popular guide for the Avaya Session Manager SIP tracing tool, traceSM. Of course, it doesn’t hurt that I may have written the only guide, but I will take recognition in any way that I can. Today, I hope to do the same for the […]

Striking the Right WebRTC Balance

I stir up controversy every time I say this, but I will say it anyway. WebRTC does not define a signaling protocol. This means that developers are free to use whatever method or protocol they want when they create their solutions. In my latest article for No Jitter, I introduce my readers to the AudioCodes […]

A Primer on Communications Security

You can’t apply security in just one place and be done with it. In my latest article for No Jitter, I explore the fundamentals of  keeping prying eyes and ears away from your enterprise communications.  In a world where hackers are everywhere and the damage they do can be enormous, this is not a subject […]