I have recently purchased the Cisco MG51E cellular gateway. I was hoping to use it as our failover internet connection. Since inserting the SIM card, the ISP has told me that it is not communicating correctly. It is duplicating contact to the 4G network. The current configuration I have is it is plugged directly into our Palo Alto firewall. Will this work or do I need to get a device between the firewall and the gateway? ... View more