Detail information about audio subsystem configuration can be found in the Administrator's Guidedocument document.
On the Intercom Subsystem Server Subsystem Server of security intercom terminal, go to the Hardware tab of System settings dialog box. Image Modified
Select the Computer object corresponding to the configured Client from the object tree on the Hardware tab.
On the basis of this object, create and configure the Audio card object corresponding to the audio card installed on the Client.
On the basis of Audio Card object, create and configure the Microphone object corresponding to the Client microphone which will be in use while communication sessions with SIP-device.