Hi @KJG7077, welcome to our forum!
Do I understand correctly that you want the device to ring for a bit longer before a call is transferred to your voicemail? If that is correct, please get in touch with your operator and they will assist you with raising the amount of ring signals that will come through before the calls is transferred to the voicemail.
I hope that helps and if I misunderstood your question, please do elaborate a bit! 
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