Solution : Check ACS proxy Outbound proxy and realm are FQDN, server address is an IP address 
13.6.14 No way to call from MTW conference 
Symptom : MyIC Desktop / MTW conference / select a participant or add a number to call / call 
Diagnosis : In SIPServer logs we find key words according to Invite from ACS 
17:59:47.595:(1) Received [12,UDP] 639 bytes from 192.168.6.131:5068 
<<<<< 
SIP/2.0 503 Service unavailable 
In TNS logs : 711 Critical: No boxes known to proxy incoming INVITE 
Solution : User configuration/ license / Max audio leg => 12 
 
13.6.15 No way for an Oxe user to enter in conference 
Symptom : when an oxe user call a conference, he can not enter in it 
Solution : uncheck the option “Confirm Callbacks with a keypress” 
 
13.6.16 How to delete a user conference 
Symptom : Need to delete a ACS conference 
Solution : Use the VCS command vcs_conf_delete to remove the conference, the user password need to be 
known 
Exp : Delete the scheduled conference with Leader code 0463669 owned by the user test8@alu.com. 
https://SERVERNAME/cgi-
bin/vcs_conf_delete?username=test8@alu.com&password=password&xml=raw&delete_vanity=0463669&all
_vanities=true 
13.6.17 MTW does not provide the right call number