Our deployment guide contains an application note on how to record solutions based on the Zetron DCS-5020 digital radio console.
In summary:
Total Recall VR does NOT support recording via an E1 connection to a DE1M module as this does not accurately reflect exact audio. Instead, it is easy to connect Total Recall VR directly to BDRM, DEM and DSM modules.
BDRM Recording
The BDRM provides the summed receive and transmit audio for each of the two channels on pins 4 and 5 of the LOCAL connector for the channel. The audio is available on pins 4 and 5 of the LOCAL connector regardless of whether the LOCAL or the RMT jack is used as interface to the radio.
Connect a Total Recall VR analogue channel to pins 4 and 5 of a LOCAL port to capture audio from a radio channel on the BDRM module.
DSM Recording
This interface allows connection of telephones (or equipment that appear as telephone). It is a standard two wire telephone interface basically.
Connect a Total Recall VR analogue channel in parallel with the telephone capture audio from a channel on the DSM module.
DEM Recording
This interface allows connection of standard analogue telephone subscriber (trunk) lines. It is a standard two wire telephone interface basically.
Connect a Total Recall VR analogue channel in parallel with the trunk line to capture audio from a channel on the DEM module.