The MX Security Appliances and the Z1 Teleworker Gateway both support a Cellular WAN connection. This allows the devices to be used in situations in which there may not be a convenient or steady wired connection, or as a failover in case of emergency. Information on model compatibility and details on this feature can be found here for an MX Security Appliance, or here for a Z1 Teleworker Gateway.
When using a cellular modem as a redundant uplink connection on an MX Security Appliance, there will still be a small amount of traffic over that connection, even though it is not being used for client traffic.
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