These devices have an X10 AUDIO RX connector. Pins X10.2 (AUDIO_RX_A) and X10.3 (AUDIO_RX_B) 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). Make sure that the output is set to -10dBm.
However, the products 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.
It is also possible to define Total Recall VR as a SIP endpoint and appear as an R&S GB4000V unit on the network. Again, this type of recording requires only IP recording channels, not analogue.