[c-nsp] QoS for VoIP - clarification needed in non-congested times

[false]

Hello,


I need a little clarification / assistance please. I 
have a cable modem connection that is 50mb down and 3mb up. The most I 
ever do in the download direction is around 8 to 10 mb. It's the upload 
that gets me sometimes when it spikes to around 2.5mbps up. I need to 
make sure my voip traffic ALWAYS gets sent on the wire first, regardless if there is congestion or not. Would the policy below work? If not, how should I tweak it.

Thank you,

class-map match-any QOS_REAL-TIME_VOIP
 match access-group name VOIP_Traffic
 
ip access-list extended VOIP_Traffic
 permit ip any any eq x.x.x.x

 permit ip any any eq x.x.x.x

 
  policy-map VoIP

 class QOS_REAL-TIME_VOIP
  priority 784
 class class-default
  shape average 48000000
  bandwidth 50000000
Thank you,