E.164 format on called number but not calling number and want to add e.164 to calling number

My C15 currently sends called number digits in E.164 format but not the calling number. I want to also send the calling number in E.164 format. Do I need to make any changes in the SBC to do this, or can I just start sending the calling number in E.164 format from my C15 now?

Thanks,

I thought I could get an answer here by support in 24 hours or so?