I installed FreePBX on Hyper-V. Everything is fine, but sometimes agent’s voice is heard “robotic”. This problem occurs in both external and internal (extension -> extension) calls.
What is the cause of the problem do you think? What should I check?
CentOS 6.6 x86_64 (installed on Hyper-V)
Agents use Eyebeam (126.96.36.199 Build 30936) softphone and Jabra (UC 5550) headsets.