Monthly Archives: August 2013

Don’t “Call” Me With SIP

Even though I tell myself to stop, I continue to make the same mistake over and over again.   No, it’s nothing illegal, immoral, or fattening.  If only.   My problem is that I refer to the media connections established by SIP as “calls.”  While that might not seem like a big deal to you, it is […]

WebRTC and SIP

Over the past weeks and months, I’ve had a number of people ask me if WebRTC (Web Real-Time Communication) is going to replace SIP.  It’s a good question and the first time I was asked I didn’t have a good answer.  That’s because like many people, I really didn’t understand what WebRTC was.  Chances are […]

Session Management

If you have been following my blog it should be clear that I like SIP.  I like it for its simplicity, its ability to create sessions of any media type, and its synergy with the Internet and web.  However, it’s just a protocol and as such it’s basically a bunch of request and response messages.  […]

SIP vs. H.323

On a number of occasions I’ve mentioned how I prefer SIP over H.323.  Some of you, rightfully so, are probably wondering why?  Just because SIP is newer doesn’t make it better.  Well, here are a number of reasons why I’ll take SIP over H.323 any day of the week. First, let’s look at who controls […]

Where You Lead — Understanding TR/87

TR/87 (Technical Report 87) is an interesting off-shoot from SIP.  In the most basic sense, it is used for remote call control between two SIP-based systems.  If you have a SIP service somewhere in your network that needs to control a SIP entity somewhere else in your network, TR/87 can provide the glue.  Unlike traditional […]

Moving to SIP — How not to Wander in the Wilderness

If you are a fan of Tolkien’s “The Lord of the Rings,” you know that Aragorn was described by the words “Not all who wander are lost.”  Now, while that’s perfectly fine for a ranger and the future king of Gondor, it’s not fine for an IT department as they move their communications systems to […]

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 […]