Cradlepoint W1855 Series Quick Start Manual page 9

Step 3: Attach PoE Ethernet Cable
Insert an Ethernet cable connector into the adapter's port
labeled 2.5GbE 0 PoE which must run to a PoE capable
router/switch, or to the included PoE injector.
TIP: Due to the recessed position of the Ethernet ports, any
protective boots or snag-free attachments over the connector may
make it difficult to remove the connector once inserted into the
Ethernet port once your testing is complete.
Setup of the PoE injector is shown later in this guide.
Step 4: Attach Cellular Antennas
1. Remove the four covers from the N-type antenna sockets.
2. Remove the plastic port protectors from the antennas, and
slide off the cardboard sleeves.
3. Attach the four cellular antennas to the four N-type socket
connectors. The antennas screw onto the N-type socket
connectors. Be sure that you align the antennas carefully to
avoid cross-threading the connection. Tighten until finger
tight.