Couple of things to check/consider:
First, ensure you actually associated the policy to the interface(s).
Next, check to see if it may be related to an ip cef bug by disabling ip cef oif it is enabled on your router (you would not be the first to run into ip cef bugs).
Then, limit the bandwidth in the region setup to max. 4 calls (since you only have 4 phones on the branch location there is really no need to put it to unlimited (the default)).
Why would you put your priority percentage to 60%on a 1Mbps call if you have max. 4 calls? If you are using G.729a your real need is appr. 108kbps and not 600kbps.
This is based on 20ms samples (50 pps) for G729 + 7 bytes L2 overhead for your wan link per packet. If you use VPN you may need to increase. Check you bandwidth calculation.
Ensure you are actually running G.729a over the WAN (packet trace/snif) and not G.711
Last but ot least, I am kinda puzzled with how you connection actually looks like. You stated in your original post it is DSL but you're not doing any VPN. Does this mean you have some sort of private IP line running over DSL? I can not imagine someone sending VoIP traffic directly over the Internet without encrypting.
And one hing I have to say: Keep in mind that the forum is not an official support channel. It is best effort, people willing to help out. So posting multiple replies as a reminder is not a good practice. If your issue is that urgent you may just open up a case with Cisco TAC or your partner/reseller and they will assyst you if you have a contract with them.
HTH,
Leo
