Hello All, I am using Freeswitch on Debain 8. Configured few DIDs. Calls coming from provider and I am trying to send Call to a Asterisk server but getting an error "MANDATORY_IE_MISSING". DID Provider (3.3.3.3) => FS (192.168.1.70) => Asterisk (192.168.1.92) => Ext 8001 *FS dialplan =>* <extension name="public"> <condition field="destination_number" expression="(.*)"> <action application="bridge" data="sofia/external/$1@192.168.1.92"/> <action application="hangup"/> </condition> </extension> Added DID Provider IP and Asterisk IP in ACL. When I checked on Asterisk, got an error in sngrep, "401 Unauthorized". Attached image is of error. *On Asterisk =>* SIP.conf [freeswitch_1] type=peer host=192.168.1.70 port=5080 disallow=all allow=ulaw trustrpid=yes sendrpid=yes context=from-internal EXTENSIONS.conf exten => _XXX.,1,Dial(SIP/8001,30,oT) exten => _XXX.,n,Hangup Tried on port 5080 and 5060. Error both time same. My point is, this is Asterisk issue or Freeswitch? Please advice. -- Thanks & Regard Uday. Mobile:- +91-9377579349