Remove ringing sounds when trying to dial another number/extension in conference call
When on a call and another call is transferred to our lines, the new call will ring through the existing call preventing us from being able to hear the person we're talking to. We can't just transfer a call we need to have a separate window open with the other users to see if they're on the phone already and then we can transfer from yet another window. This program requires 3 different windows just to function.
If we figure out how to silence the new call from ringing through then we receive a surprise voicemail.

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Ericka commented
When on a call and another call is transferred to our lines, the new call will ring through the existing call preventing us from being able to hear the person we're talking to. We can't just transfer a call we need to have a separate window open with the other users to see if they're on the phone already and then we can transfer from yet another window. This program requires 3 different windows just to function.
If we figure out how to silence the new call from ringing through then we receive a surprise voicemail.