I was called out to work on a FreePBX system for only the second time ever at a customer in the telemarketing business. They wanted their outgoing caller id to only show up as “Private” on their prospective customers phones. I found they had 23 channels on a single trunk, rather than multiple POTS lines and their service did not respond to *67.
After checking this forum for hints and LOTS of trial and error I got it to work via the following:
Set Outbound CID on trunk to: “” <>
Set each extension Outbound CID to: “hidden” <1-1-1-1>
The result was all calls to both local and long distance numbers show “Private call” on the dialed phone. If somebody has a slicker way to do this, I’m all ears!