The solutions mentioned by Dan are all FDD, and have single (!!!) frequency channel. How can they fit at a dense urban to backhaul small dozens of small cells? Scalability and efficiency were not part of the design fundamental when those were made. Gigabit ports. Again, the solutions mentioned here all have single port and they also fail the size and shape criterion. Bear in mind: the only real small cell and street level solution, designed from scratch for dense urban environment while targeting all those important issues (and many more) is Siklu's EH-600T. Now take a look and realize what leading small cell outdoor backhaul pioneers already understood while bringing this innovative product to their trails.