Hello When need to assign variable value with XML symbols requires escaping is suggested to use dialplan contractions like example <action application="set"><![CDATA[ sip_h_Call-Info=<urn:nena:uid:callid:72270801514820004831: lng.001.experient.co.us>;purpose=nena-CallId]]></action> But more elegant will be <action application="set" data="sip_h_Call-Info=<urn:nena:uid:callid:72270801514820004831: lng.001.experient.co.us>;purpose=nena-CallId"/> I want add this functionality to FS. Could you give me reference to FS code where is used escaping/unescaping. Sergey