System Information
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Kernel: 2.6.18-128.1.10.el5 (SMP)
Trixbox: 2.8.0.1
Running on Microsoft Hyper-V (2008)

Problem
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I'm out of my league a bit here; if anyone can offer some advice I'd be most appreciate it!

I have a new install of Trixbox running in a Hyper-V environment. I toyed around with an earlier version this year but had severe "stuttering" issues running in it in Hyper-V. The latest build doesn't seem to have the same issue. I'm not sure if everything is right -- but I also have an install of the "older" version of Trixbox on physical Dell machine which seems to act the same.

The issue is audio seems to cut-out, similar to dropped packets. It is more annoying (like a mediocre mobile call) than unable to understand. But it does makes it not acceptable as a replacement to any existing system we have.

The problem seems to exist on all connection points:
-LAN Phones (Grandstream and X-Lite SOftphone)
-Inbound call on SIP Trunk (BroadVox or Aretta)
-Remote SIP ATA

Internet connection is a fiber 10M connection with fairly low utilization. Latency of around 50 ms to sip provider. Minor Packet Loss.

Not running QoS on LAN segment being tested but there *should* be no congestion issues on the segment. 1 to 2 ms ping times.

Ideas? Let me know if any additional information can help. I appreciate anything!