Thank you for your response. Can you please tell me a bit about...
* RTP traffic is being blocked or consumed by a FireWall, (FW), or another security device.
Wouldn't that mean a complete loss of audio for the office workers? The description seems to say they can still hear some.
* Signalling issues, (call agent is not passing the correct ports or codec, or the communication is tagged as 'send only' or 'receive only')
How do I investigate this idea?
* RTP traffic is corrupted.
What would cause such severe corruption? The network is otherwise healthy.
Thank you for you effort Ratheesh!