Author Archives: Marc Spehalski

Marc started with VoIP Supply in August of 2015 as the senior VoIP engineer but now operates as outside consultant. He has a diverse background in communication systems acquired in both the military and civilian world but largely focuses on open source VoIP.

The VoIP Addict’s Guide – The Incredible Inedible 1531P

March 14, 2017

If you spend a great deal of time deploying VoIP systems or building IP networks for various customers, you quickly learn to appreciate things that ... READ MORE

The VoIP Addict’s Guide – VoIP Security Fact and Fiction

February 28, 2017

VoIP security is a hot topic, and rightfully so. A compromised system can cost you $$$ in phone bills, so how do you prevent a ... READ MORE

The VoIP Addict’s Guide – My Top 3 VoIP Systems

February 21, 2017

If you were expecting to read about ShoreTel, Cisco, or Avaya, you'd be wrong. While these are "VoIP" systems, I'd like to draw some attention ... READ MORE

Avaya Replacement Solution: Digium’s Switchvox

February 7, 2017

Another one bites the dust. It wasn't that long ago that we discovered Elastix had gone the way of the dodo and left us scratching our ... READ MORE

RIP Elastix – Hello Renegade and FreePBX

December 21, 2016

If you haven't heard, Elastix, which was once considered a permanent and trusted fixture in open source VoIP, is no longer a thing. At least, not ... READ MORE

Set Up Extensions on a Cloud Based FreePBX

December 9, 2016

One of the best things about modern VoIP systems is how flexible they are when it comes to how you deploy them. You can use ... READ MORE

The Grandstream UCM IP PBX Product Review: Choose the Right UCM for You

December 7, 2016

Note: This is part III of the three-part blog series. See part I & part II. If you like what you've read so far, you are ... READ MORE

The Grandstream UCM IP PBX Product Review: Asterisk and Auto-Provision

December 5, 2016

Note: This is part II of a three-part blog series. See Part I here. In the previous blog, you've learned why PoE, FXO and FXS matter ... READ MORE

The Grandstream UCM IP PBX Product Review: Why Do PoE, FXO and FXS Matter?

December 1, 2016

I am what you might call a "phone geek". I've developed, supported, and tinkered with just about every popular SIP (Session Initiation Protocol) based VoIP platform ... READ MORE