Hi, The delay I am getting from delay_echo is roughly half of what I pass as parameter in its data. This is the snippet, and the log shows on screen that I am passing what I intend to <extension name="delay_echo"> <condition field="destination_number" expression="^\*7(\d)$"> <action application="answer"/> <action application="set" data="delta=${expr(1+1000*$1)}"/> <action application="log" data=" *** delta = ${delta} "/> <action application="delay_echo" data="${delta}"/> </condition> </extension> I am running FreeSWITCH Version 1.5.12b~64bit ( 64bit) (as per command "version" in fs_cli) in a VMware VM with OS=Windows Server 2012. Thanks.