Have you ever left just one phone number you can be reached at with someone that will absolutely need to get ahold of you in an emergency? Probably not. When it is absolutely critical that a message reach you, you leave a second number as a back-up, just in case. Your industrial network is no different. To avoid the risk and expense of system outages and downtime, ensure your communications (and operations) keep flowing with a back-up or redundant network.