how to change adressbook URI integration from "callto:" into "sip:"

[steini]

Hello,

how is it possible to change the existing URI integration - e.g. in adress book from "callto:" into "sip:" ? Is there a config anywhere?

"sip:" is already a registered handler (by jabber) and dialing by a klick on the telephonenumber should trigger jabber.

Thank you.