Anonymous outbound (no callerid) call on Zap channel


We have Asterisk servers running in several european countries. So we’re able to forward calls via ENUM ( to the 0800 numbers of this countries. However, calls via ENUM (from unverified sources) to the PSTN should not contain a callerid!

Regular calls from knwon sources should send their cllerids.

How can I supress the callerid on individual outbound calls on Zap channels?