I have a  Mitel contact center installed , i also have oaisys  and intelligent queue  .
I have being looking on how to solve an issue i have where the supervisor try to silent monitor an agent  but when it start the silent monitor  the agent start hearing a White Noise but if the agent speak the client can hear and also the supervisor but the agent only hear white noise .
 if the supervisor stop the silent monitor  the white noise disappear . (The white noise is occurring in some calls only and some days every time the supervisor try to do a silent monitor).
PSTN call arrive on a T1 to a  Cisco PBX and then it is delivered to the mitel 3300 .
Do someone have an idea of what could be the problem?