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T-mobile Ericsson Cell Equipment For Ericsson markets t-mobile uses what is known as AIR antenna units which have the radio unit integrated with the antenna. This type of setup significantly reduces signal loss from the radio to the antenna since they're both practically next to each other and not sepearated by coax jumper cables like that of a remote radio unit. Basic Ericsson AIR21 setup (Note typically there are 2 Ericsson AIR per sector) Ericsson AIR21 + Band 12 700 mhz Equipment Note the addition of a new low band 700 mhz capable antenna + Ericsson RRUS11 B12 (remote radio units) in addition to new TMA (tower mounted amplifiers) connected to the AIR antenna. The new Ericsson RRUS11 B12 + Antenna addition is for tmobiles band 12 700mhz (L700) deployment. (Credit: tmo.rocks) Credit for the photographs belong to whoever took it. You know who you are!