Hi list! When setting the caller id name to undefined like this: <action application="set" data="effective_caller_id_name=_undef_"/> the P-Asserted-Identity header in an outgoing invite looks like this: P-Asserted-Identity: "_undef_" <sip:123456@192.168.9.22> Other headers, for instance the From: header, do respect this. The From header in the same outgoing invite looks like this: From: <sip:123456@192.168.9.22>;tag=NcB07tpNK673p Is there something I'm missing here or is this a bug? Steven