Hi All, we have a number of out of band RB hAP routers out there which have a Sierra Wireless 320U 4G Modem connected to them and use the Telstra 4G LTE network, on the whole these work well, however they regularly, as in once every day or so, stop receiving data, however the LTE interface on the RB does not recognize that there is no data coming in and still thinks it's running and all is good. I have looked for a keepalive or something for the interface but can't find anything, I don't know if it's a Telstra network issue or the RB or perhaps just how it is but we need these to remain up as much as possible as they are for OOB access to our POP's, has anybody come across this issue before and have any suggestions ? As soon as you disable the LTE interface and re-enable it things work fine. I also have an SXT LTE router which does the same thing, so kind of thinking it's not a modem problem as they have the integrated one. Thanks Paul