How to make outboud call selecting trunk

Hi all!

I have 3 different SIP accounts with 3 diferent numbers. I have inbound routes allready configured based on DID number, but I don't know how to call outside, and select the trunk depending on the sip account I want to use.

I know I can configure prefixes to do this, but it's not very confortable for recalling calls from the phone call history.

Is there any elegant way to do this? I have Yealink T26 phones with possibility for 4 extensions.

Any idea?

Thanks!!