WAN 3

[JDavie]

Both our WAN ports on our MX450 are occupied. We also have an cellular backup device (bundled from ISP). It only outputs RJ45. Is there a way to set one of the RJ45 ports on the SD-WAN to act as another WAN interface, or adapt the ethernet cable from our cellular modem to the USB port for cellular devices on the SD-WAN?

[KarstenI]

Sadly, no! The MX only supports two WAN connections. One solution is to put another device in front of one MX-WAN and terminate two ISP connections on that device. 

[MartinS]

I would take the SIM out of the ISP provided device and put it in a USB cellular dongle?