Permanent Audio Stream
From Zenitel Wiki
IP Stations can be configured to permanently transmit two RTP streams (configurable). The RTP audio will be sent to a given ipaddress/port with configured codec.
The configuration web page for Permanent Audio is hidden: <ipaddress>/goform/zForm_stream_config
It is possible to change the condition for enabling RTP to only be during calls.
It is also possible to make only calls created using specified DAKs enable the stream in SIP mode.
Tools like VS-Recorder 2.0 can be used to record the actual RTP audio.