No camera video during conversation using SIP intercom stations

Symptoms 
 The intercom is online and connected; calls can be made, but there is no video signal. 
 Cause 
 Bug in Asterisk Connector v5.4.2 
 The disruption of the video signal is usally caused by a conflict in handling video and call recording. The intercom connector / asterisk connector needs to be updated / downgraded.  
 Network Issue 
 
 Configuration Issue 
 
 How To 
 
 
 
 Update Asterisk connector to v5.2.3 or higher.