4 Rev. G category for urban and suburban areas (9)
7 Device with a drum (7)
8 An FAA determination (8)
9 Major tower firm with corporate headquarters in Israel (5)
11 Alternate process instead of welding on tower (8)
13 Tower developer indicted for perjury and bankruptcy fraud (6)
15 Major acquisition by Verizon Wireless (6)
17 Inventor of the first commercial cellular portable telephone (8)
19 President and CEO of major tower trade association (5)
21 Used frequently to access a tower (8)
23 Lock for connection hardware (6)
24 AT&T Wireless began as: (13)
25 American Tower Company is a: (12)