Tag Archives: Acme

Taming the Dial Plan Spaghetti Monster

I have been making and answering telephone calls for over 50 years and yet I still struggle when it comes to remembering the numbers of most of the people I see and work with on a daily basis. Heck, I couldn’t even tell you the telephone numbers of my kid’s cell phones. That’s not because […]

High Availability Session Border Controllers Down and Dirty

Any subject worth learning is like an onion. No, not because it will make you cry (although some sure bring out the tears for me). Rather, it’s because a worthwhile subject consists of multiple layers and every time you think you completely understand the whole thing, you find something new to capture your time and […]

When the Session Border Controller Became the Toaster

This week’s article for No Jitter discusses the commoditization of the session border controller (SBC). It’s far from a rant, though. Instead, I write about how SBCs need to be positioned differently than they have been in the past. It’s not enough to talk about simultaneous sessions and adaptations. I want to hear about what […]

Why I Still Get Excited About Session Border Controllers

I remember my first DVD player. I couldn’t tell you the exact year I bought it, but it must have been sometime in the 1990s. However, I do remember that it cost me around $400 and it wasn’t even the most expensive one on the market. There were quite a few that went for more […]

Virtual Communications

In my perfect communications world there are no gateways, analog and digital trunk cards, ringtone generators, T1 clock controllers, or any of the other components of a TDM infrastructure.  Everything runs on off-the-shelf servers, using standard operating systems, across an IP network.  Of course, my perfect world is pure SIP and because of some recent […]

A Quick Primer on Transcoding

Transcoding is the process of converting one protocol to another.  In the IP communications world, this might entail converting H.323 to SIP.  H.323 was the first widely used VoIP protocol and many older systems have not been updated to speak SIP.  Through transcoding, these older systems can still participate in a SIP communications cloud. Transcoding […]

Andrew’s Session Border Controller Checklist

A Session Border Controller (SBC) is an integral part of any SIP solution that has a public edge.  It might be easiest to think of it as a firewall for SIP, but it’s so much more than that.  An SBC can perform Network Address Translation (NAT) between an enterprise’s private to public IP space (and […]