CHICAGO--(BUSINESS WIRE)--Fitch Ratings affirms InSite Wireless Group, LLC's secured cellular site revenue notes, series 2013-1 as follows: --$123.9 million 2013-1 class A at 'BBBsf'; Outlook Stable; --$39.6 million 2013-1 class B at 'BB-sf'; Outlook Stable. Fitch does not rate the $14 million 2013-1 class C notes. KEY RATING DRIVERS The affirmations are the result of the cash flow growth since issuance due to the following: contractual rent bumps; additional leases; and acquisition of addition