VOIP - transmiting data on the high priority channel

Hi there, can anyone assist me on advice on setting up high priority channels for VOIP. I have read that you assign a % of the link for high priority traffic to flow through. Is this the most effective way to setup for VOIP?? Any suggestions would be much appreciated.
:lol:

VOIP can be transmitted via high priority channels: SM TOS bit - Voice gateway & VOIP boxes would have to be setting the TOS bit.
AP- enable High priority channel.

Hardware scheduling active on AP’s & SM’s.
FYI: SM’s and AP’s have to be on version 7.2 to successfully run hardware and software scheduling together.