Skip dial "1" by using VD dial out

Maybe this question is got answered before, but I did not find perfect posts.

I appreciate if anyone can help.

ATA is SPA 1001, the line 1 is for outcoming call by VD. I know I have to change dial plan if I want to skip dial "1" for US call. sometimes, I felt confuse about dial plan and am afraid to mess it up.

This is the current dial plant as default for line 1

(*xx|[3469]11|0|00|[2-9]xxxxxx|1xxx[2-9]xxxxxxS0|xxxxxxxxxxxx.)

Please advise

Many thanks