How do I modify the P-asserted Identity

[cynjut (Dave Burgess)]

If you want to modify a dial-plan, you add something like this:

SipAddHeader(P-Asserted-Identity: sip:${CALLERIDNUM})

If you want to do it in a dial-hook, you could use this:

Hooking for fun and income

Despite the frequency with which it arises here in the forum, there is not yet a good resource for learning to use dialplan hooks in FreePBX. This will probably end up in the wiki at some point, but until that happens, here are the broad strokes for leveraging dialplan hooks in FreePBX 14. What is a dialplan hook? A dialplan hook refers to several pre-defined FreePBX contexts that exist solely for users to add their own Asterisk Macros to be run at specific locations in the call flow. They all …

If this is a one-off, you could create a new outbound route and specify the outbound caller ID in that, and set it so that only your extension is identified as a possible caller.