To support the explosive growth of cellular traffic, the build out of high capacity “wireless infrastructure” is working hard to keep pace. These mobile front-haul and back-haul networks link cell phone towers (2G, 3G, 4G and soon, 5G) with local base stations and remote Enterprise/Telecommunications networks, to ensure a smooth flow of information. Mobile front-haul has been quickly adopting wired optical communications to increase line rates while reducing weight, cost, power and susceptibility to nature’s challenges. Front-haul often uses CPRI or OBSAI interconnect standards, tailor made for these base station to remote radio head links. Mobile back-haul uses a variety of wired and free-space interconnects, depending on local and regional considerations. Fiber optics is commonly deployed for wired back-haul applications, using Ethernet or SONET/OTN communications. High reliability and wide temperature range of operation are key considerations for these applications.