Hi, I have a SIP Trunk account. From some companys that call me, which also have a SIP Trunk account, I can only see the main number in the phone display but not the extension. The correct number with the right extension is only inside the sip_P-Asserted-Identity variable and not the caller_id_number. So I thought I could assign the sip_P-Asserted-Identity to effective_caller_id_number and all is fine but that is not working. conf/dialplan/public/voip_inbound.xml <extension name="telekom-voip-inbound-extension"> <condition field="${sip_h_P-Called-Party-ID}" expression="(XXXXXXX(\d{2}))"> <action application="set" data="domain_name=$${domain}"/> <action application="set" data="effective_caller_id_number=${sip_P-Asserted-Identity}"/> <action application="set" data="effective_caller_id_name=${sip_P-Asserted-Identity}"/> <action application="transfer" data="$2 XML default"/> </condition> </extension> What am I doing wrong? Best regards