we are currently in the process to get our UC540 certified by a swiss cable SIP provider, the final test we need to pass is the anonymous outgoing call (hiding caller id) which is initiated by sending [email protected] in the SIP Invite-URI (see http://www.faqs.org/rfcs/rfc3323.html)
From: "Anonymous" <sip:[email protected]>;tag=1928301774
Now our questions:
- How can we set this (CLI preferred) permanently for a single extension
- Is it possible to do this case-by-case using a SPA525G phone?
Any help on this would be greatly appreciated, thank you!