When it discusses cost transformation, AT&T generally hits the headlines for radical new architectures, but there are far more pragmatic tactics which will also be important to keeping 5G total cost of ownership under control. One is the relationship which the telco has with its tower operators. It has been trying to improve its balance of power with site providers over the past few years, aware that 5G will require far more locations – dense networks for high capacity urban applications and millimeter wave spectrum will both drive this. That means telcos must expand into new types of sites, such as lamp-posts, in numbers which will only be affordable if rental prices are negotiated on a very different basis to…