T46S Call Hiccups

[igendreau]

We just launched our VOIP system. We are using Vonage's Business Cloud service with Yealink T46S handsets on the desk. We've had really bad repeated pauses on our calls, and have had Vonage and our networking company searching for something in the firewall, switches, you name it. Everything looks like it's setup correctly.

After a few days online, it appears that all of the issues are occurring when using the Yealink. The call is crystal clear, it just hiccups. Short bursts of total silence that break up the voice. I've timed them to look for a pattern, but no luck. I've attached a sample (of some weird number where people just read phrases) and the hiccups occur at :03, :18, and :38. The recording is a pretty mild case. It can be difficult to understand the person on the other end sometimes.

New to Yealinks, but familiar with the web interface by now. Anyone have any ideas of where I should look to see if I can tweak the config to get rid of the hiccup? Any direction is much appreciated. Thanks!