Hello @simoncope,
If you upgrade to GA release of Firmware 8.1.1 for the SDX (not test by myself) & EPX (tested by myself), you can turn on PoE for the WAN ports allowing you to connect Pepwave MAX HD1 & HD2 Domes and also Pepwave Device Connectors. You could also connect PoE 802.3at/af compatable Point to Point links in.
Happy to Help,
Marcus 
3 Likes