These devices comprise of a transmitter and a receiver unit.
The transmitter unit has an AUX2 connector. Pins 3 (MONITOR_P) and 6 (MONITOR_N) 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).
The receiver unit has a REM connector. Pins 3 (LINE_P) and 6 (LINE_N) 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).
However, this product have full support for EUROCAE ED-137 and when in use on such networks you should consider using the EUROCAE ED-137 recording interface provided by Total Recall VR. This interface is all IP based and uses IP recording channels instead of analogue.