This device has an Auxiliary connector. Pins 7 (AUDIO TAP IN) and 13 (AUDIO TAP OUT) can be connected to an analogue channel on the Total Recall VR recorder (to either pins 3 and 4, or pins 2 and 5 of an RJ12 connector on the recorder).
Note: the functions of the pins 7 (AUDIO TAP IN) and 13 (AUDIO TAP OUT) is programmable and should be set for Rx output (in Programmable I/O set Tap Out to R7 Busy Detect).